Faculty Profiles - BAN Syuhei

Papers - BAN Syuhei

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Cumulative reproduction model to quantify the production of the invasive species Arctodiaptomus dorsalis (Calanoida, Copepoda) Reviewed

Takahashi A., Ban S., Papa R.D.S., Tordesillas D.T., Dur G.

Ecological Modelling 482 2023.8

Language：English Publishing type：Research paper (scientific journal) Publisher：Ecological Modelling

Arctodiaptomus dorsalis is an invasive calanoid copepod originally from America and has recently established a population in Lake Taal in the Philippines. It has been proposed that eutrophication due to aquaculture contributes to the establishment and success of this species. This study aimed to clarify this hypothesis by quantifying the effect of increasing food concentration on the reproduction of A. dorsalis using an Individual-Based Model. We parameterized food concentration-dependent equations to simulate the effect of different food concentration on the reproductive traits (latency time, embryonic development time, clutch size, and hatching success) of this species using data from the literature and simulated the reproduction of 1000 independent females for 20 days at different food concentration, taking into account the variability among individuals. The simulation results showed that the cumulative production of eggs and offspring increased continuously with time when the food concentration was above 3.2 × 104 cells mL−1, suggesting that this value was the threshold concentration required for stable reproduction of A. dorsalis. This value is not particularly low compared to other copepods. Hence, our result revealed that the food use efficiency of A. dorsalis is not particularly outstanding and urge the need of a comparison with native species to confirm a possible superiority. We suggest that A. dorsalis has filled the ecological niche left vacant by the disappearance of the original species due to the deterioration of water quality caused by the eutrophication of the lake. The reproductive cycle model developed in this study constitutes a necessary step in the development of a complete population dynamics model, which can help clarify the invasive abilities of A. dorsalis.

DOI： 10.1016/j.ecolmodel.2023.110398

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Sedimentary DNA can reveal the past population dynamics of a pelagic copepod Reviewed

Nakane K., Liu X., Doi H., Dur G., Kuwae M., Ban S., Tsugeki N.

Freshwater Biology 2023.1

Language：English Publishing type：Research paper (scientific journal) Publisher：Freshwater Biology

Copepods play a key trophic role as secondary producers, transferring primary production to higher trophic levels such as fish. Copepod production contributes significantly to successful fish recruitment. Despite their importance, knowledge of copepod dynamics over several decades remains limited due to the lack of long-term data series with adequate sampling and analysis. However, an understanding of long-term copepod dynamics is urgently required to strive toward better management for sustainable aquatic ecosystems and fish recruitment. Sedimentary DNA (sedDNA) has been developing as a useful tool for reconstructing past plankton dynamics. This study evaluates whether sedDNA targeting the pelagic copepod, Eodiaptomus japonicus, in Lake Biwa (Japan) can be an effective tool for elucidating its past population dynamics. We applied a quantitative polymerase chain reaction method targeting the mitochondrial cytochrome c oxidase subunit I gene on two sediment cores and compared the detected sedDNA concentrations with the unique long-term dataset of demographic traits, biomass, specific growth rate, production, subitaneous eggs, and resting eggs of E. japonicus. The sedDNA concentration of E. japonicus recovered from sediment layers correlated significantly with in situ production, biomass, and production of immediately hatching eggs but not with resting eggs or specific growth rate. Our study provides evidence for the effective use of sedDNA as a tracking tool for assessing past copepod production dynamics.

DOI： 10.1111/fwb.14096

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The first report of the non-indigenous Chydorus brevilabris Frey, 1980 (Crustacea: Cladocera) in Asian freshwaters Reviewed

Makino, W., H. Suzuki, Y. Otake, S. Ban and J. Urabe

Limnology 2023

Causal networks of phytoplankton diversity and biomass are modulated by environmental context Reviewed

Chang C.W., Miki T., Ye H., Souissi S., Adrian R., Anneville O., Agasild H., Ban S., Be’eri-Shlevin Y., Chiang Y.R., Feuchtmayr H., Gal G., Ichise S., Kagami M., Kumagai M., Liu X., Matsuzaki S.I.S., Manca M.M., Nõges P., Piscia R., Rogora M., Shiah F.K., Thackeray S.J., Widdicombe C.E., Wu J.T., Zohary T., Hsieh C.h.

Nature Communications 13 ( 1 ) 2022.12

Language：English Publishing type：Research paper (scientific journal) Publisher：Nature Communications

Untangling causal links and feedbacks among biodiversity, ecosystem functioning, and environmental factors is challenging due to their complex and context-dependent interactions (e.g., a nutrient-dependent relationship between diversity and biomass). Consequently, studies that only consider separable, unidirectional effects can produce divergent conclusions and equivocal ecological implications. To address this complexity, we use empirical dynamic modeling to assemble causal networks for 19 natural aquatic ecosystems (N24◦~N58◦) and quantified strengths of feedbacks among phytoplankton diversity, phytoplankton biomass, and environmental factors. Through a cross-system comparison, we identify macroecological patterns; in more diverse, oligotrophic ecosystems, biodiversity effects are more important than environmental effects (nutrients and temperature) as drivers of biomass. Furthermore, feedback strengths vary with productivity. In warm, productive systems, strong nitrate-mediated feedbacks usually prevail, whereas there are strong, phosphate-mediated feedbacks in cold, less productive systems. Our findings, based on recovered feedbacks, highlight the importance of a network view in future ecosystem management.

DOI： 10.1038/s41467-022-28761-3

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A new sampling method with zirconium-loaded resin for phosphate oxygen isotope analysis in oligotrophic freshwater systems Reviewed

Ishida T., Tayasu I., Onodera S.i., Ban S., Okuda N.

Rapid Communications in Mass Spectrometry 36 ( 22 ) 2022.11

Language：English Publishing type：Research paper (scientific journal) Publisher：Rapid Communications in Mass Spectrometry

Rationale: The phosphate oxygen isotope ratio ((Formula presented.)) is a useful technique to trace the sources and biogeochemical cycles of phosphorus (P) in aquatic ecosystems. However, (Formula presented.) has not been widely used in oligotrophic freshwater systems due to technical and methodological difficulties in collecting sufficient phosphate (PO4) for the (Formula presented.) analysis, which sometimes requires hundreds of liters of the water sample. In this study, a new approach (PaS-Zir) was developed for the (Formula presented.) analysis in oligotrophic freshwater systems using zirconium (Zr)-loaded (ZrIRC) resin, which has a high affinity for PO4. Methods: ZrClO2 was added to Amberlite IRC748 to obtain the ZrIRC resin. The adsorption/desorption experiment using KH2PO4 with a known value of (Formula presented.) was conducted to determine the adsorption/desorption properties of the resin and the likelihood of isotopic fractionation. By installing mesh bags filled with the resin, the PaS-Zir approach was used in two rivers with low PO4 concentrations (0.2 and 5.3 μmol/L). A conventional sampling method was also performed in the study river with a higher PO4 concentration to validate the efficacy of the PaS-Zir method. Results: The adsorption/desorption experiment demonstrated that the ZrIRC resin possessed a sufficient adsorption capacity (153 μmol/resin-mL) and exhibited little isotopic fractionation during the adsorption/desorption processes. Using the PaS-Zir method, we were able to collect sufficient PO4 samples for the (Formula presented.) analysis from the rivers within at least 4 days of mesh bag installation. The (Formula presented.) values (14.2‰ ± 0.2‰) obtained using the PaS-Zir method were comparable to those obtained using the conventional method (14.0‰ ± 0.03‰). Conclusion: We proved that the PaS-Zir method is applicable to oligotrophic freshwater systems and is generally more efficient than the conventional method. In addition, our method is useful for improving the understanding of the P dynamics of oligotrophic ecosystems because of the extremely low concentration of PO4 commonly found in them, which are often prone to P pollution.

DOI： 10.1002/rcm.9393

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Disrupted seasonal cycle of the warm-adapted and main zooplankter of Lake Biwa, Japan Reviewed

Dur G., Liu X., Sakai Y., Hsieh C.h., Ban S., Souissi S.

Journal of Great Lakes Research 2022.1

Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Great Lakes Research

The seasonal cycle is an important feature of life, leading to the succession of different species and allowing them to share a common environment. Disruption in the seasonal cycle of many species has been reported, but the source of disruption varies from species to species. Lacustrine zooplankton species are widely acknowledged to respond to climate-induced, thermal and trophic variations. Here, we discuss the case of a warm-adapted copepod in Lake Biwa (i.e., Eodiaptomus japonicus), which experienced changes in trophic status and thermal regime over four decades (1966–2010). We investigated the phenological response of E. japonicus to these changes over this period and aimed to identify the sources of the observed variations. The combined results of wavelet analysis and cluster analysis indicated that E. japonicus exhibited different seasonal cycles during the study period. The common unimodal seasonal cycle of the copepod was disrupted on several occasions during which it presented sometimes two or three modes. Wavelet coherence analysis revealed a strong stationary correlation with lake temperature for the total abundance, the clutch size, and the birth rate, but a transient correlation with the body size of females at the annual scale. No coherence was found with food proxies. Discriminant analysis between unimodal and plurimodal seasonal cycles highlighted the effect of low temperature and high predation in leading to plurimodal cycles. Our study emphasizes the need for considering the seasonality of both lower and higher trophic levels for understanding zooplankton phenology.

DOI： 10.1016/j.jglr.2022.06.001

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Mate-seeking behavior in the calanoid copepod Eodiaptomus japonicus. Reviewed International journal

Journal of Plankton Research 44 961 - 965 2022

Effect of acute acidic stress on survival and metabolic activity of zooplankton from Lake Biwa, Japan. Reviewed International journal

Gao, H., X. Liu* and S. Ban

Inland Waters 12 488 - 498 2022

A new method for phosphate purification for oxygen isotope ratio analysis in freshwater and soil extracts using solid-phase extraction with zirconium-loaded resin Reviewed International journal

Ishida, T., H. Kamiya, Y. Uehara, T. Kato, S. Sugahara, S.-i. Onodera, S. Ban, A. Payton, I. Tayasu and N. Okuda

Rapid Communications in Mass Spectrometry 36 ( e9384 ) 2022

Enhancement of algal growth by Mg<sup>2+</sup> released from anaerobic digestion effluent of aquatic macrophytes through photolysis Reviewed

Qian J., Shimotori K., Liu X., Ban S., Akizuki S.i., Fujiwara M., Kodera T., Toda T., Imai A.

Biochemical Engineering Journal 172 2021.8

Language：English Publishing type：Research paper (scientific journal) Publisher：Biochemical Engineering Journal

Anaerobic digestion effluent (ADE) from aquatic macrophytes (Egeria densa, Elodea nuttallii, Ceratophyllum demersum and Potamogeton maackianus) contains insufficient available magnesium ions (Mg2+) to achieve maximum algal yield and nutrient removal, although Mg concentrations are not scarce at 6–10 mg L−1. Unavailable Mg2+ may be bound into complexes with dissolved organic matter (DOM). We determined the effects of ADE exposure to ultraviolet C (UVC), and degradation of DOM, on Mg availability for growth of Chlorella sorokiniana. Molecular sizes of DOM binding Mg2+ were identified with high-performance size-exclusion chromatography. The results demonstrated that 3 h exposure to UVC can decompose DOM, and release sufficient amounts of available Mg2+, i.e. 0.09 mg from 1 mg of dissolved organic carbon, thus enhancing algal yield and nutrient removal. Almost 50 % of Mg in the ADE was bound by DOM with a molecular size of 400–1170 Da as organic complexes, and the remaining Mg was bound by DOM of < 240 Da and/or Mg2+ and inorganic Mg complexes.

DOI： 10.1016/j.bej.2021.108065

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Climate change drives widespread shifts in lake thermal habitat Reviewed

Kraemer B.M., Pilla R.M., Woolway R.I., Anneville O., Ban S., Colom-Montero W., Devlin S.P., Dokulil M.T., Gaiser E.E., Hambright K.D., Hessen D.O., Higgins S.N., Jöhnk K.D., Keller W., Knoll L.B., Leavitt P.R., Lepori F., Luger M.S., Maberly S.C., Müller-Navarra D.C., Paterson A.M., Pierson D.C., Richardson D.C., Rogora M., Rusak J.A., Sadro S., Salmaso N., Schmid M., Silow E.A., Sommaruga R., Stelzer J.A.A., Straile D., Thiery W., Timofeyev M.A., Verburg P., Weyhenmeyer G.A., Adrian R.

Nature Climate Change 11 ( 6 ) 521 - 529 2021.6

Language：English Publishing type：Research paper (scientific journal) Publisher：Nature Climate Change

Lake surfaces are warming worldwide, raising concerns about lake organism responses to thermal habitat changes. Species may cope with temperature increases by shifting their seasonality or their depth to track suitable thermal habitats, but these responses may be constrained by ecological interactions, life histories or limiting resources. Here we use 32 million temperature measurements from 139 lakes to quantify thermal habitat change (percentage of non-overlap) and assess how this change is exacerbated by potential habitat constraints. Long-term temperature change resulted in an average 6.2% non-overlap between thermal habitats in baseline (1978–1995) and recent (1996–2013) time periods, with non-overlap increasing to 19.4% on average when habitats were restricted by season and depth. Tropical lakes exhibited substantially higher thermal non-overlap compared with lakes at other latitudes. Lakes with high thermal habitat change coincided with those having numerous endemic species, suggesting that conservation actions should consider thermal habitat change to preserve lake biodiversity.

DOI： 10.1038/s41558-021-01060-3

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Temporal variation in community structure of zoosporic fungi in Lake Biwa, Japan Reviewed

Song P., Yi R., Tanabe S., Goto N., Seto K., Kagami M., Ban S.

Aquatic Microbial Ecology 87 17 - 28 2021.1

Language：English Publishing type：Research paper (scientific journal) Publisher：Aquatic Microbial Ecology

Zoosporic fungi play an important role in aquatic environments, but their diversity, especially that of parasitic fungi of phytoplankton, has still not been fully revealed. We conducted monthly analyses of the community structure of zoosporic fungi at a pelagic site in Lake Biwa, Japan, from May to December 2016. Metabarcoding analysis, targeted to a large subunit region of ribosomal DNA in the nano-size fraction of particles (2-20 μm), was carried out on the samples. We also counted large phytoplankton and chytrid sporangia attached to the hosts. We detected 3 zoosporic fungal phyla (Blastocladiomycota, Chytridiomycota and Cryptomycota) within 107 operational taxonomic units (OTUs), in which Chytridiomycota was the most diverse and abundant phylum. Few fungal OTUs overlapped between months, and specific communities were detected in each month. These results showed that diverse zoosporic fungi with high temporal variability inhabited the lake. Five large phytoplankton species were found to be infected by chytrids: Staurastrum dorsidentiferum, S. rotula, Closterium aciculare, Asterionella formosa and Aulacoseira granulata. Some chytrids were detected by metabarcoding analysis: Zygophlyctis asterionellae infecting A. formosa, Staurastromyces oculus infecting S. dorsidentiferum and Pendulichytrium sphaericum infecting A. granulata. One OTU detected in association with infected C. aciculare by microscopic counting might have been an obligate parasitic chytrid of C. aciculare. The results indicated that a combination of metabarcoding and microscopic analysis revealed more information on zoosporic fungi, including those that are parasitic.

DOI： 10.3354/AME01970

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Quasi-decadal periodicities in growth and production of the copepod Eodiaptomus japonicus in Lake Biwa, Japan, related to the Arctic Oscillation Reviewed

Liu X., Dur G., Ban S., Sakai Y., Ohmae S., Morita T.

Limnology and Oceanography 2021.1

Language：English Publishing type：Research paper (scientific journal) Publisher：Limnology and Oceanography

Copepods are important secondary producers that support higher trophic levels in aquatic food webs. Large-scale climate events such as climate oscillations and global warming force on physical and chemical conditions in aquatic ecosystems might regulate copepod production through physiological and biochemical processes. We evaluated how large climatic and anthropogenic events impacted secondary production of copepods in Lake Biwa, the largest lake in Japan. We determined demographic traits such as body size, growth rate, biomass and production of the dominant copepod Eodiaptomus japonicus in this lake over four decades (1971–2010). To evaluate in situ food conditions and estimate growth and production for this omnivorous species, we firstly defined a size-based food index (f), that is the ratio of in situ body size to ideal body size in adult females. Values of f were mostly < 1 even during eutrophication (1970s to the early 1980s), suggesting that this copepod continuously suffered from a food shortage in this lake. Quasi-decadal periodicities were detected in f, growth and production (but not biomass) for this copepod throughout the study period. These periodicities were correlated with the Arctic Oscillation, implying that long-term trends in climate could regulate copepod food availability and production. This correlation weakened after 1990, which might be due to a regime shift in lake water temperature, which increased abruptly in the mid-1980s. Global warming might now be disrupting historical quasi-decadal periodicity in growth and production of copepods in Lake Biwa.

DOI： 10.1002/lno.11918

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Size-mediated temperature effect on embryonic development in Eodiaptomus japonicus (Copepoda, Calanoida) in Lake Biwa, Japan Reviewed

Liu X., Ban S.

Journal of Plankton Research 42 ( 6 ) 779 - 782 2020.11

Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Plankton Research

Egg size has numerous ecological implications for zooplankton, and can influence hatching duration and female fecundity. In this study, temperature functions of embryonic development time (EDT) were determined in the copepod Eodiaptomus japonicus from Lake Biwa, in the cold and warm seasons, to clarify synergistic effects of egg size and temperature on EDT. EDT was longer for cold season eggs than warm ones, but both seasons were well fitted by Bělehrádek's function. Egg size was significantly correlated with female body size within seasons, but the relationship did not differ significantly between seasons. These results suggest that seasonal variation in EDT, which was associated with egg size, may result from temperature-mediated variation of female body size, because larger females produced larger eggs as temperature decreased. Larger eggs may enhance fitness under severe food conditions in winter due to high hatchability and naupliar survival.

DOI： 10.1093/plankt/fbaa045

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Are egg production and respiration of the marine pelagic copepod Acartia steueri influenced by crowding? Reviewed

Takayama Y., Hirahara M., Liu X., Ban S., Toda T.

Aquaculture Research 51 ( 9 ) 3741 - 3750 2020.9

Language：English Publishing type：Research paper (scientific journal) Publisher：Aquaculture Research

© 2020 John Wiley & Sons Ltd The understanding of the biological responses of copepods under crowding conditions contributes to establish their stable cultures at high densities for aquaculture industry, which are preferred live feeds for fish larvae. The present study investigated survivorship, fecundity, hatching success and respiration rate, of Acartia steueri raised under five densities, from 100 to 2,000 ind. L−1, to clarify the biological responses of the copepod under dense culture. There were no significant differences in survival, fecundity and hatching success among all density conditions, whereas the respiration rate at 2,000 ind. L−1 decreased by 80% as compared with a condition at 100 ind. L−1. The female copepods raised under a copepod density of >500 ind. L−1 probably invested a larger proportion of energy in reproduction in relation to total assimilated energy as compared with females under lower copepod densities. This change of energy allocation may allow A. steueri under high densities to maintain high fecundity. Acartia steueri might be a promising species for dense culture because its mortality and fecundity were independent of the effect of crowding, and the density-dependent reduction in the metabolic rate might increase reproductive investment to maintain a constant rate of reproduction even under high densities.

DOI： 10.1111/are.14723

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Novel wet-solid states serial anaerobic digestion process for enhancing methane recovery of aquatic plant biomass Reviewed

Iweh N.S., Koyama M., Akizuki S., Ban S., Toda T.

Science of the Total Environment 730 2020.8

Language：English Publishing type：Research paper (scientific journal) Publisher：Science of the Total Environment

© 2020 Elsevier B.V. Aquatic plant biomass is characterised by high moisture content and a lignocellulose structure. To apply the anaerobic digestion (AD) treatment to aquatic plants, the simultaneous achievement of high methane (CH4) recovery per biomass volume and high biodegradability have been a challenge owing to these characteristics. Herein, we propose a novel two-stage serial wet- and solid-state AD (SS-AD) system that quickly digests the labile cytoplasm fraction in the first wet AD reactor in a short retention time while slowly digesting the lignocellulosic fraction in the later SS-AD with long retention time. In this study, the effect of this serial AD on CH4 recovery and chemical oxygen demand (COD) balance from aquatic plant biomass was examined in a semi-continuous operation. Elodea nuttallii, which grows excessively in the southern basin of Lake Biwa, Japan, was used as the substrate. For comparison, single-stage AD with different hydraulic retention times (HRTs) (30 d and 15 d) was performed. The CH4 conversion efficiency in single-stage AD deteriorated from 47.6 to 33.1% COD with shortened HRT, probably owing to the low degradability of slowly degrading fraction (i.e. lignocellulose) in the short retention time. In contrast, the serial AD under the same HRT (15 d) as a single-stage AD exhibited higher CH4 conversion efficiency of 65.1% COD, mainly owing to the enhanced degradation of slowly degrading fraction because of the prolonged solid retention time (52.2 d) of the entire system. The CH4 recovery from the wet AD alone in the serial AD system surpassed that from the 30 d-HRT of the single-stage AD, possibly due to the appropriate HRT for labile fraction and/or the microbial recirculation. The serial wet and SS-AD was suggested as a suitable technology for the treatment of aquatic plant biomass with recalcitrant cell walls and a labile cytoplasm.

DOI： 10.1016/j.scitotenv.2020.138993

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Conditions for continuous cultivation of Chlorella sorokiniana and nutrient removal from anaerobic digestion effluent of aquatic macrophytes Reviewed

Liu X., Fujiwara M., Kodera T., Watanabe K., Akizuki S., Kishi M., Koyama M., Toda T., Ban S.

International Biodeterioration and Biodegradation 149 2020.4

Language：English Publishing type：Research paper (scientific journal) Publisher：International Biodeterioration and Biodegradation

© 2020 Elsevier Ltd Continuous cultivations of the microalga Chlorella sorokiniana using 10-L flat-panel bioreactors were conducted at different pH levels and hydraulic retention times (HRT) under natural light conditions to accomplish the maximum algal yields and high nutrient removal from anaerobic digestion effluent (ADE) of aquatic macrophytes, which contained high concentrations of ammonium-nitrogen and phosphate-phosphorus, but less available magnesium (Mg). In subsequent experiments, Mg was enriched directly or indirectly by lowering the pH in the original ADE as source medium of a flow-through system to increase the amount of available Mg for algal growth. In the Mg-enrichment experiment, a constant maximum algal yield, 0.7 g dry-weight L−1, was obtained at HRT of 5 days, and removal efficiencies in both ammonium-nitrogen and phosphate-phosphorus were >94%. The pH-controlled experiment was conducted at HRTs of 5 and 10 days at two different pH levels (5.0 and 6.5) of the source ADE. Finally, similar algal yields and nutrient removals were obtained using source ADE at pH 6.5 and 10 days HRT as those in the Mg-enrichment experiment. We demonstrated that pH control in the source ADE through continuous cultivation at the relatively longer HRT can help to maximize algal yield and improve nutrient removal without Mg enrichment.

DOI： 10.1016/j.ibiod.2020.104923

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琵琶湖南湖で過剰繁茂する水草を原料としたメタン発酵消化液の水耕栽培における培養液としての利用可能性 Reviewed

畑直樹, 刘鑫, 田口夏帆・金本良成, 吉田弦, 瀬山智博, 戸田龍樹, 伴修平

水資源・環境研究 2020.1

Resting eggs of the perennial copepod Eodiaptomus japonicus in Lake Biwa (Japan) Reviewed

Liu X., Ban S., Beyrend D., Dur G., Kuwae M., Makino W., Urabe J.

Inland Waters 2020.1

Language：English Publishing type：Research paper (scientific journal) Publisher：Inland Waters

© 2019, © 2020 International Society of Limnology (SIL). Egg dormancy is a key life history strategy in copepods to temporarily escape catastrophic or repetitive detrimental events and ensure permanent colonization. In Lake Biwa, although the copepod Eodiaptomus japonicus dominates the zooplankton community year-round, it has been known to produce resting eggs, yet little is known about its dormancy. To clarify the nature of dormancy in E. japonicus, we collected a sediment core from Lake Biwa, isolated resting eggs, and conducted hatching experiments to determine the life-cycle traits of the hatched individuals. We isolated 242 eggs (maximum age, 60 years) from the upper 17 cm depth sediments, and although no strict catastrophic event such as seasonal drying up was found, the findings implied that E. japonicus might have a “bet-hedging” strategy. Accumulated egg density above 17 cm was 2.5 × 104 m−2, and mean annual egg flux was 103 m−2 per year. Over the first 10 cm sediments, average egg hatching success was 17%. No egg hatchings were confirmed below 10 cm depth. Embryonic development times of the resting eggs were longer than those of subitaneous eggs, indicating that a lag phase existed until development resumed; 33% of hatched nauplii molted to adulthood, and 80% of females produced offspring. These results suggest potential recruitment from resting eggs in the bottom sediments, which partly serve as an egg bank in this copepod.

DOI： 10.1080/20442041.2019.1671766

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pH treatments in continuous cultivation to maximize microalgal production and nutrient removal from anaerobic digestion effluent of aquatic macrophytes Reviewed

Qian J., Liu X., Ban S., Fujiwara M., Kodera T., Akizuki S., Toda T.

Journal of Applied Phycology 2020.1

Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Applied Phycology

© 2020, Springer Nature B.V. Green algae have great potential for removing inorganic nutrients from anaerobic digestion effluent (ADE), but there is insufficient available magnesium (Mg) in the ADE from aquatic macrophytes for effective algal growth. In this study, we determined suitable pH and hydraulic retention time (HRT) for maximizing growth of the alga Chlorella sorokiniana and nutrient removal efficiency with a flow-through continuous cultivation system. This used ADE from aquatic macrophytes, adjusted to pH 5.0, 6.0, 6.5 and 7.0 at two HRTs of 6 and 8 days. The highest C. sorokiniana biomass concentration was obtained in the pH 6.5 treatment, being 0.50 and 0.67 g L−1 at 6 and 8 days of HRT, respectively, without Mg enrichment. Both were equivalent to 83.6 mg L−1 day−1 of biomass productivity. Removal rates of both ammonium nitrogen and phosphate phosphorus were almost 100% in pH 6.5 and 7.0 treatments and declined to below 60% in pH 5.0 and 6.0 treatments during the study period. The results demonstrated that a source medium pH of 6.5 using a continuous cultivation system (irrespective of the two HRTs), and increasing available Mg, was suitable for maximizing C. sorokiniana biomass productivity and nutrient removal from the ADE.

DOI： 10.1007/s10811-020-02196-z

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Nutrient removal from anaerobic digestion effluents of aquatic macrophytes with the green alga, Chlorella sorokiniana Reviewed

Kimura S., Yamada T., Ban S., Koyama M., Toda T.

Biochemical Engineering Journal 142 170 - 177 2019.2

Language：English Publishing type：Research paper (scientific journal) Publisher：Biochemical Engineering Journal

© 2018 Elsevier B.V. Green microalgae have great potential for removing inorganic nutrients from wastewater and anaerobic digestion effluent (ADE). We investigated the cultivation conditions for maximum algal yield and nutrient (ammonium and phosphate) removal rates. The green microalga, Chlorella sorokiniana, was cultured using ADE from anaerobic digestion by two dominant macrophytes, Elodea nuttallii and Egeria densa, which cause environmental problems in Lake Biwa, Japan, because of excessive growth. Available magnesium (Mg) in the ADEs from both macrophytes was not sufficient for maximum algal growth and nutrient removal. We demonstrated that Mg-enrichment was essential for enhancing algal yield in, and nutrient removal rate from, ADEs.

DOI： 10.1016/j.bej.2018.12.001

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Determining suitable submerged macrophyte biomass in terms of dissolved oxygen concentration and biodiversity in the South Basin of Lake Biwa, Japan Reviewed International journal

Ishikawa, K., H. Haga, E. Inoue and S. Ban

Limnology 2019.1

Differences in dissolved phosphate in shallow-lake waters as determined by spectrophotometry and ion chromatography Reviewed

Yi R., Song P., Liu X., Maruo M., Ban S.

Limnology 2019.1

Language：English Publishing type：Research paper (scientific journal) Publisher：Limnology

© 2019, The Japanese Society of Limnology. Phosphorus (P) plays important roles in aquatic ecosystems, but accurately determining phosphorus species (particularly bioavailable phosphate) is difficult. When phosphate concentrations are spectrophotometrically measured as soluble reactive P (SRP), the actual values are often overestimated. Ion chromatography is one method for accurately measuring orthophosphate concentrations. To clarify how the spectrophotometrical measurement overestimates actual phosphate concentrations, we compared estimates of phosphate concentrations in lake waters using both methods. SRP and orthophosphate concentrations in water samples collected from four shallow lakes around Lake Biwa, Japan, were determined monthly for 1 year by spectrophotometry and ion chromatography, respectively. SRP concentrations were frequently higher than those for orthophosphate in all lakes throughout the study period, suggesting that SRP and orthophosphate are not equivalent, although a significant relationship was found between them. Orthophosphate/SRP (ortho/SRP) ratios varied spatiotemporally in all lakes (range 0.11–1.04; mean 0.56), being well predicted by biological-mediated relevant parameters using a stepwise multiple logistic regression analysis (R 2 = 0.76). The results implied that organic matter associated with biological activity contributes to the variability in ortho/SRP ratios. Such large variability in ortho/SRP ratios emphasizes the importance of accurate orthophosphate estimates for understanding P dynamics in aquatic ecosystems.

DOI： 10.1007/s10201-019-00574-2

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Planktivorous fish predation masks anthropogenic disturbances on decadal trends in zooplankton biomass and body size structure in Lake Biwa, Japan Reviewed

Liu X., Dur G., Ban S., Sakai Y., Ohmae S., Morita T.

Limnology and Oceanography 2019.1

Language：English Publishing type：Research paper (scientific journal) Publisher：Limnology and Oceanography

© 2019 Association for the Sciences of Limnology and Oceanography Pelagic zooplankton samples from Lake Biwa, Japan, collected monthly since 1971, were analyzed for biomass and body size structure. Our aim was to clarify the relative effects of food availability and global warming vs. top-down control by fish predation on long-term trends. Annual mean biomass and density-weighted body size were calculated and compared with water temperature, total phosphorus (TP), as a proxy of food amount, and catch per unit effort (CPUE) of Ayu (Plecoglossus altivelis altivelis), as a proxy of planktivorous fish predation pressure. Mean water temperature above 20 m increased by 0.94°C. TP increased until 1974 and then decreased until 1985, becoming stable after that. Ayu CPUE increased until 1987 and then declined. The study period can be divided into two nutritional phases: a high TP phase (1971–1985) and a low-stable TP phase (1986–2010). Five zooplankton taxa, Eodiaptomus japonicus, Cyclopoida spp., Daphnia spp., Bosmina longirostris, and Diaphanosoma orientalis, were continuously dominant. Annual mean total crustacean biomass varied from 0.3 to 3.6 g dry weight m−2, slightly decreasing until 1993 but increasing thereafter. Generalized linear models showed that annual mean body sizes were affected by temperature and CPUE, whereas annual mean biomass was affected by TP and CPUE. These had no effect during the high TP phase, whereas only CPUE affected both traits during the low-stable TP phase. We concluded that zooplankton biomass and body size long-term trends were mostly influenced by fish predation and that eutrophication and global warming impacts might be affected by top-down control.

DOI： 10.1002/lno.11336

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Validation of a high-resolution acoustic imaging sonar method by estimating the biomass of submerged plants in shallow water Reviewed

Mizuno K., Asada A., Ban S., Uehara Y., Ishida T., Okuda N.

Ecological Informatics 46 179 - 184 2018.7

Language：English Publishing type：Research paper (scientific journal) Publisher：Ecological Informatics

© 2018 Acoustic sensing is often used for mapping and monitoring aquatic plants in shallow waters. Recently, high-resolution imaging sonar was applied to study a variety of aquatic organisms. This method can provide high-resolution, three-dimensional (3D) acoustic data on the spatial distribution of submerged plants. However, no commercial software packages are available to digitalize the images of submerged plants generated from imaging sonar data, and the high-resolution imaging sonar method has not been standardized because of a lack of empirical data. In this study, we measured the biomass of submerged plants in the north basin of Lake Biwa using high-resolution acoustic imaging sonar and compared the results to directly measured biomass values to validate the utility of high-resolution acoustic imaging sonar as a quantitative method. Biomass was calculated in 10 randomly selected quadrats (1 × 1 m) in Lake Biwa. The analysis of the resulting data indicated a strong correlation between the number of pixels in the digital images of submerged plants and their directly calculated biomass (R2= 0.91, p <.0001). The results suggest that the high-resolution imaging sonar method is a promising tool for estimating the biomass of submerged plants. Thus, this method is expected to contribute to a better understanding of aquatic ecology.

DOI： 10.1016/j.ecoinf.2018.07.002

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Fungal community structure at pelagic and littoral sites in Lake Biwa determined with high-throughput sequencing Reviewed International journal

Song, P., S. Tanabe, R. Yi, M. Kagami, X. Liu, S. Ban

Limnology 2018.4

Effects of temperature and nutritional conditions on physiological responses of freshwater copepod Eodiaptomus japonicus in Lake Biwa Reviewed

Liu, X. and S. Ban

Limnological Study 2018.4

Modern lake ecosystem management by sustainable harvesting and effective utilization of aquatic macrophytes Reviewed International journal

Ban, S., T. Toda, M. Koyama, K. Ishikawa, A. Kohzu and A. Imai

Limnology 2018.4

Effects of different algal diets and carbon supplies on larval development, growth and survival in the freshwater copepod Mongolodiaptomus malaindosinensis (Copepoda: Calanoida) Reviewed

Boonmak P., Liu X., Ban S., Sanoamuang L.

Plankton and Benthos Research 13 ( 4 ) 163 - 172 2018.1

Language：English Publishing type：Research paper (scientific journal) Publisher：Plankton and Benthos Research

© 2018, Plankton Society of Japan. All rights reserved. The freshwater calanoid copepod Mongolodiaptomus malaindosinensis is an endemic species of the lower Mekong basin, including Malaysia. The relationships between environmental factors and life history traits have been reported for many copepods, while they have never been assessed in this tropical species. Post-embryonic development time (post-EDT), body size and survival rate of M. malaindosinensis were determined under different algal concentrations of Chlamydomonas reinhardtii and Cryptomonas tetrapyrenoidosa at 25°C, to clarify the effects of algal species and carbon supply on their somatic growth and survival. Post-EDT until adult in M. malaindosinensis decreased with increasing food carbon supply regardless of the algal species tested. Although naupliar developments were the shortest at 10 4 cells mL −1 of C. reinhardtii, food shortage delayed the development time and also induced high mortality during the copepodid stages. The highest survival rate of 93% was obtained in the copepods fed on C. tetrapyrenoidosa at 5×10 4 cells mL −1 , whereas the survival rates in the remaining lower carbon supply were <23%. The most sensitive stages were the 1st copepodid stage, as indicated by high stage-specific mortalities, because of large morphological and physiological changes in this transitional stage. Prosome length of adult M. malaindosinensis positively correlated with food carbon supplies, though females were larger than males. Somatic growth rate exponentially increased with increasing food carbon supplies with a threshold at around 4.0 mgC L −1 . These results suggest that tropical copepods may be adapted to higher food quantities due to their high metabolic rates under high temperature conditions.

DOI： 10.3800/pbr.13.163

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Effect of operating temperature on anaerobic digestion of the Brazilian waterweed Egeria densa and its microbial community Reviewed International journal

Watanabe, K., M. Koyama, J. Ueda, S. Ban, N. Kurosawa, T. Toda

Anaerobe 47 8 - 17 2017.4

Effects of acclimatization on metabolic plasticity of Eodiaptomus japonicus (Copepoda: Calanoida) determined using an optical oxygen meter Reviewed International journal

Liu, X. and S. Ban

Journal of Plankton Research 39 111 - 121 2017.4

Effect of alkaline pretreatment on mesophilic and thermophilic anaerobic digestion of a submerged macrophyte: Inhibition and recovery against dissolved lignin during semi-continuous operation Reviewed International journal

Koyama, M., K. Watanabe, N. Kurosawa, K. Ishikawa, S. Ban and T. Toda

Bioresource Technology 238 2017.4

Effects of food concentration on the reproductive capacity of the invasive freshwater calanoid copepod Arctodiaptomus dorsalis (Marsh, 1907) in the Philippines Reviewed International journal

Tordesillas D.T., P.M.F. Paredes, K.P.E. Villaruel, C.A.A.M. Queneri, J.L. Rico, S. Ban and R.D.S. Papa

J. Crustacean Biol. 2017.4

Anaerobic co-digestion of alkali-pretreated submerged macrophytes and acidified food waste for reduction of neutralizing agents Reviewed International journal

Koyama, M., N. Nakahashi, K. Ishikawa, S. Ban, T. Toda

International Biodeterioration & Biodegradation 125 208 - 213 2017.4

Possibility of a recycling-oriented society through sustainable utilization of aquatic weed biomass Invited

Ban S., T.i Toda, K. Ishikawa and A. Kozu

Kankyo-gijutsu 45 ( 9 ) 30 - 35 2016.4

Effect of temperature on life history traits of the invasive calanoid copepod Arctodiaptomus dorsalis (Marsh, 1907) from Lake Taal, Philippines Reviewed

Tordesillas, D.T., N.K.P. Abaya, M.A.S. Dayo, L.E.B. Marquez, R.D.S. Papa and S. Ban

Plankton Benthos Res. 11 1 - 7 2016.4

Inhibition of anaerobic digestion by dissolved lignin derived from alkaline pre-treatment of an aquatic macrophyte Reviewed International journal

Koyama, M., S. Yamamoto, K. Ishikawa, S. Ban and T. Toda

Chemical Engineering Journal 311 55 - 62 2016.4

Enhancing anaerobic digestibility of lignin-rich submerged macrophyte using thermochemical pre-treatment Reviewed

Koyama, M., S. Yamamoto, K. Ishikawa, S. Ban, T. Toda

Biochem. Eng. J. 2015.4

Characterization and mosquitocidal potential of neem cake-synthesized silver nanoparticles: genotoxicity and impact on predation efficiency of mosquito natural enemies Reviewed International journal

Chandramohan, B., K. Murugan, C. Panneerselvam, P. Madhiyazhagan, R. Chandirasekar, D. Dinesh, P.M. Kumar, K. Kovendan, U. Suresh, J. Subramaniam, R. Rajaganesh, A.T. Aziz, S. Ban, M.S. Alsalhi, S. Devanesan, M. Nicoletti, H. Wei and G. Benelli

Parasitol. Res. 2015.4

Combined effects of temperature and food concentration on growth and reproduction of Eodiaptomus japonicus (Copepoda: Calanoida) from Lake Biwa (Japan). Reviewed International journal

Liu, X., D. Beyrend-Dur, G. Dur, S. Ban

Freshwater Biology 60 2003 - 2018 2015.4

Effectiveness of preservatives and poisons on sediment trap material in freshwater environments Reviewed

Goto, N., K. Hisamatsu, C. Yoshimizu and S. Ban

Limnology 17 87 - 94 2015.4

Fighting arboviral diseases: low toxicity on mammalian cells, dengue growth inhibition (in vitro), and mosquitocidal activity of Centroceras clavulatum-synthesized silver nanoparticles Reviewed International journal

Murugan, K., P. Aruna, C. Panneerselvam, P. Madhiyazhagan, M. Paulpandi, J. Subramaniam, R. Rajaganesh, H. Wei, M.S. Alsalhi, S. Devanesan, M. Nicoletti, S. Ban, A. Canale and G. Benelli

Parasitol. Res. 2015.4

Anaerobic digestion of submerged macrophytes: Chemical composition and anaerobic digestibility Reviewed

Koyama, M., S. Yamamoto, K. Ishikawa, S. Ban and T. Toda

Ecological Engineering 15 85 - 97 2014.4

Effects of temperature on life history traits of Eodiaptomus japonicus (Copepoda: Calanoida) from Lake Biwa (Japan) Reviewed

Liu, X., D. Beyrend-Dur, G. Dur, S. Ban

Limnology 2013.10

クロロフィル蛍光を用いた現場植物プランクトン一次生産力測定法の検討 Reviewed

太田洋平・後藤直成・伴修平

陸水学雑誌 74 173 - 181 2013.1

稲作水田におけるホンモロコGnathopogon caerulescens 仔稚魚の育成 Reviewed

亀甲武志, 根本守仁, 伴修平, 三枝仁, 澤田宣雄, 石崎大介, 中橋富久, 寺本憲之, 藤岡康

水産増殖 61 303 - 309 2013.1

Annual variation in biomass and the community structure of crustacean zooplankton over five years in Lake Toya, Japan. Reviewed

Ban, S., W. Makino, H. Sakano, H. Haruna and H. Ueda

Limnology 14 59 - 70 2012.10

稲作水田におけるゲンゴロウブナ Carassius cuvieri 仔稚魚の育成 Reviewed

亀甲武志・根本守仁・伴修平・三枝仁・澤田宣雄・石崎大介・中橋富久・寺本憲之・藤岡康弘

水産増殖 61 19 - 26 2012.1

Eutrophication and warming effects on long-term variation of zooplankton in Lake Biwa Reviewed

Hsieh, C.H., Y. Sakai, S. Ban, K. Ishikawa, T. Ishikawa, S. Ichise, N. Yamamura and M. Kumagai

Biogeosicences 8 1383 - 1399 2011.5

Spring ammonium maximum in the mid-depth layer of Lake Biwa. Reviewed

Tanaka, L.L., S. Ban and M. Kumagai

Canadian Journal of Civil Engineering 37 515 - 523 2010.3

Within-lake and watershed determinants of carbon dioxide in the surface water: A comparative analysis for a variety of lakes in Japanese Islands Reviewed

Urabe, J., T. Iwata, Y. Yagami, E. Kato, T. Suzuki, S. Hino and S. Ban

Limnol. Oceanogr. 56 49 - 60 2010.3

Inhibitory effects of Acacia extract on growth of blue-green algae Microcystis spp. Reviewed

An-qui Yin, Hong-Wu Lee, Kotomi Watanabe, Koya Nakamura, Ho-Dong Park and Syuhei Ban

The Plankton Society of Japan 57 73 - 78 2010.3

Comprehensive analysis of an Antarctic bacterial community with the adaptability of growth at higher temperatures than those in Antarctica Reviewed

Hosoi-Tanabe, S., H. Zhang, D. Zhu, S. Nagata, S. Ban and S. Imura

Biocontrol Science 15 57 - 62 2010.3

Psychroflexus lacisalisi sp. nov., a moderate halophilic bacterium isolated from a hypersline Lake Hunazoko-Ike in Antarctica Reviewed

Zhang, H.-Y., S. Hosoi-Tanabe, S. Nagata, S. Ban and S. Imura

Journal of Microbiology 48 160 - 164 2010.3

The spatial and temporal distribution of rice herbicides in Lake Biwa, Japan. Reviewed

Tanaka, L.L., M. Sudo and S. Ban

Hydrological Research Letter 3 45 - 49 2009.10

Effects of physical interference on life history shifts in Daphnia pulex Reviewed

Ban, S., H. Tenma, T. Mori and K. Nishimura

Journal of Experimental Biology 212 3174 - 3183 2009.9

Limnological characteristics of vertical structure in the lakes of Syowa Oasis, East Antarctica. Reviewed

Kimura, S., S. Ban, S. Imura, S. Kudoh and M. Matsuzaki

Polar Science 3 262 - 271 2009.8

Is negative effect of crowding on ingestion rate in Daphnia pulex induced physically or chemically? Reviewed

Ban, S., T. Ohnishi, T. Mori and H.-W. Lee

Limnology 9 13 - 18 2008.1

Seasonal changes in the planktonic food web off Cape Esan, southwestern Hokkaido, Japan Reviewed

Shinada, A., S. Ban and T. Ikeda

Plankton and Benthos Reserch 3 18 - 26 2008.1

琵琶湖固有種アナンデールヨコエビ（Jesogammarus annandalei）の代謝および水平分布に与える水温の影響 Reviewed

神戸道典・伴　修平

陸水学雑誌 68 ( － ) 375 - 389 2007.4

Effect of solar ultraviolet radiation on survival of krill larvae and copepods in Antarctic Ocean Reviewed

Ban, S., N. Ohi, S.C.Y. Leong, K.T. Takahashi, C.W. Riser and S. Taguchi

Polar Biol. 30 ( － ) 1295 - 1302 2007.4

琵琶湖の植物プランクトン成長に及ぼす農業排水の影響評価の試み Reviewed

木村成子・伴　修平・吉川　徹・須戸　幹

陸水学雑誌 68 ( － ) 403 - 413 2007.4

Dimethyl sulfoxide-respiring bacteria in Suribati Ike, a hypersaline lake, in Antarctica and the marine environment Reviewed

Matsuzaki, M., K. Kubota, T. Satoh, M. Kunugi, S. Ban and S. Imura

Polar Biosci. 20 ( － ) 73 - 81 2006.4

In situ generation of refractory organic compounds in Lake Biwa, Japan Reviewed

Nohda, C., M. Maruo, S. Ban and K. Ohta

Proceeding of the Second Japan-Korea Joint Sympoium on Limnology (2005, Osaka) － ( － ) 18 - 23 2006.4

Depth distribution of euryhaline halophilic bacteria in Suribati Ike, a meromictic lake in East Antarctica Reviewed

Naganuma, T., P.N. Hua, T. Okamoto, S. Ban, S. Imura and H. Kanda

Polar Biol. 28 ( － ) 964 - 970 2005.4

Colloquium on diatom-copepod interactions Reviewed

Paffenh?fer, G.A., A. Ianora, A. Miralto, J.T. Turner, G.S. Kleppel, M. Ribera d'Alcala, R. Casotti, G.S. Caldwell, G. Pohnert, A. Fontana, D. M?ller-Navarra, S. Jonasdottir, V. Armbrust, U. Bamstedt, S. Ban, M.G. Bentley, M. Boersma, M. Bundy, I. Buttino, A. Calbet, F. Carlotti, Y. Carotenuto, G. d'Ippolito, B. Frost, C. Guisande, W. Lampert, R.F. Lee, S. Mazza, M.G. Mazzocchi, J.C. Nejstgaard, S.A. Poulet, G. Romano, V. Smetacek, S. Uye, S. Wakeham, S. Watson, T. Wichard

Mar. Ecol. Prog. Ser. 286 ( － ) 293 - 305 2005.4

Seasonal variations of plankton food web structure in the coastal water off Usujiri southwestern Hokkaido, Japan Reviewed

Shinada, A., S. Ban, Y. Yamada and T. Ikeda

J. Oceanogr. 61 ( － ) 645 - 654 2005.4

Morphological features and hatching patterns of eggs in Acartia steueri from Sagami Bay, Japan Reviewed

Onoue, Y., T. Toda and S. Ban

Hydrobiologia 511 17 - 25 2004.1

Microbial communities in oligotrophic Lake Toya, Japan Reviewed

Nakano, A. and S. Ban

Limnology 4 19 - 24 2003.1

動物プランクトンに見られる捕食者誘引性防御機構 Reviewed

伴　修平

日本プランクトン学会報 50 109 - 113 2003.1

Seasonal changes in nano/micro-zooplankton herbivory and heterotrophic nano-flagellates bacterivory off Cape Esan, southwestern Hokkaido, Japan Reviewed

Shinada, A., S. Ban and T. Ikeda

Journal of oceanography 59 609 - 618 2003.1

Stay cool: Habitat selection of a cyclopoid copepod in a north temperate oligotrophic lake Reviewed

Makino, W., T. Yoshida, H. Sakano and S. Ban

Freshwater Biology 48 1551 - 1562 2003.1

Effect of temperature on development, growth and reproduction in the marine copepod Pseudocalanus newmani at satiating food condition Reviewed

Lee, H.-W., S. Ban, T. Ikeda, T. Matsuishi

Journal of plankton research 25 261 - 271 2003.1

Fecal pellet production between molts in a cyclopoid copepod: Patterns, individual variability and implications for growth and development Reviewed

Makino, W. and S. Ban

Hydrobiologia 501 101 - 107 2003.1

The interaction between lacustrine sockeye salmon (Oncorhynchus nerka) and pond smelt (Hypomesus nipponensis) in relation to the decline of zooplankton biomass in Lake Toya, northern Japan Reviewed

Sakano, H., S. Ban, M. Kaeriyama, H. Ueda and K. Shimazaki

Verh. Internat. Verein. Limnol. 27 3881 - 3885 2001.1

Analysis of the change in dominant phytoplankton species in unstratified Lake-Ohnuma estimated by a bottle incubation experiment Reviewed

Takano, K. Y. Ishikawa, H. Mikami, S. Ban, T. Yoshida, T. Aono, K. Imada, R. Yasutomi, K. Takeuchi and S. Hino

Limnology 2 29 - 35 2001.1

The consequences of individual variability in moulting probability and the aggregation of stages for modelling copepod population dynamics Reviewed

Souissi, S. and S. Ban

Journal of plankton research 23 1279 - 1296 2001.1

Seasonal dynamics of planktonic food chain in the Oyashio region, western subarctic Pacific Reviewed

Shinada, A., T. Ikeda, S. Ban

Journal of plankton research 23 1237 - 1248 2001.1

Metabolism, body composition (C and N) and estimated net growth efficiency of a clanoid copepod Pseudocalanus newmani raised at different tempreatures in the aboratory Reviewed

Lee, H.-W., T. Ikeda, S. Ban

Plankton biology and ecology 48 114 - 120 2001.1

橈脚類と珪藻との関係をめぐる近年の理解

伴　修平

月刊海洋号外 27 111 - 115 2001.1

Seasonal abundance of resting spores and vegetative cells of Chaetoceros diatoms in Funka Bay, southern Hokkaido, Japan Reviewed

Asami, H. and S. Ban

Plankton biology and ecology 47 26 - 29 2000.1

Daily variability in height-related settlement-pattern in an intertidal barnacle Reviewed

Noda, T., K. Fukushima, T. Mori, S. Ban

journal of the marine biological association of the U.K. 80 545 - 546 2000.1

Effects of chelators (EGTA, EDTA) and calcium ions on nematode capture by the nematode-trapping fungus Arthrobotrys ellipsospora Reviewed

Mori, T., C. Morikawa, T. Noda and S. Ban

Mycoscience 41 455 - 460 2000.1

親潮域における低次食物連鎖構造の季節変化 Reviewed

品田晃良・伴　修平・池田　勉・津田　敦・斉藤宏明

日本プランクトン学会報 47 119 - 124 2000.1

Seasonal changes in micro-zooplankton grazing on phytoplankton assemblages in the Oyashio region, western subarctic Pacific Reviewed

Shinada, A., T. Ikeda, S. Ban and A. Tsuda

Plankton biology and ecology 47 85 - 92 2000.1

Top-down cotrol of population dynamics of the dominant rotifers in two mesotrophic lakes in Hokkaido, Japan Reviewed

Yoshida, T., S. Ban, T. Takenouchi, T. Aono, Y. Ishikawa, H. Mikami, K. Takano, K. Imada, R. Yasutomi and K. Takeuchi

Archive fur hydrobiologie 148 481 - 498 2000.1

In situ egg production and hatching success of the marine copepod Pseudocalanus newmani in Funka Bay and adjacent waters off southwestern Hokkaido, Japan: associated to diatom bloom Reviewed

Ban, S., H.-W. Lee, A. Shinada and T. Toda

Journal of plankton research 22 907 - 922 2000.1

Response of life history traits to food conditions in a cyclopoid copepod from an oligotrophic environment Reviewed

Makino, W. and S. Ban

limnology and oceanography 45 396 - 407 2000.1

シンポジウム「噴火湾の物質循環における春季珪藻ブルームの役割」のまとめ

伴　修平・磯田　豊

沿岸海洋研究 38 1 - 2 2000.1

珪藻ブルーム前後の捕食食物連鎖と微生物食物連鎖

伴　修平

沿岸海洋研究 38 23 - 28 2000.1

古典的食物連鎖のパラドックス Reviewed

伴　修平

日本プランクトン学会報 46 88 - 95 1999.1

Origin of Thalassiosira diatoms that cause the spring phytoplankton bloom in Funka Bay, southwestern Hokkaido, Japan Reviewed

Shinada, A., N. Shiga and S. Ban

Plankton biology and ecology 46 89 - 93 1999.1

Effects of salinity on survival, and embryonic and postembryonic development of Eurytemora affinis from a freshwater lake Reviewed

Ishikawa, A., S. Ban and N. Shiga

Plankton biology and ecology 46 113 - 119 1999.1

Deleterious effect of diatom diets on egg production and hatching success in the marine copepod Pseudocalanus newmani Reviewed

Lee, H.-W., S. Ban, Y. Ando

Plankton biology and ecology 46 104 - 112 1999.1

Effect of crowding on growth and reproduction of Simocephalus vetulus O.F. Muller Reviewed

Lee, H.-W. and S. Ban

Hydrobiologia 390 135 - 145 1999.1

Structure and magnitude of diatom spring bloom in Funka Bay, southwestern Hokkaido, Japan, as influenced by the intrusion of Coastal Oyashio Water Reviewed

Shinada, A., N. Shiga and S. Ban

Plankton biology and ecology 46 24 - 29 1999.1

Effect of high population density on growth and reproduction of Daphnia pulex DeGeer Reviewed

Nishikawa, J. and S. Ban

Plankton biology and ecology 45 55 - 60 1998.1

Life cycles of two limnetic cyclopoid copepods, Cyclops vicinus and Thermocyclops crassus, in two different habitats Reviewed

Kobari, T. and S. Ban

Journal of plankton research 20 1073 - 1086 1998.1

Diel changes in vertical overlap between Cyclops strenuus (Copepoda; Cyclopoida) and its prey animals in Lake Toya Reviewed

Makino, W. and S. Ban

Journal of marine system 15 139 - 148 1998.1

橈脚類の休眠 Reviewed

伴　修平

海の研究 7 21 - 34 1998.1

Succession of calanoid copepod community in Funka Bay during spring phytoplankton bloom

Ban, S., Y. Miyagawa, Y. Okuda and N. Shiga

Memoirs of the Faculty of Fisheries, Hokkaido University 45 42 - 47 1998.1

海色リモートセンシングと船舶集中観測による噴火湾における春季ブルームの時空間変動解析 -COMPAS (Coastal Oyashio Multidisciplinary Advanced Study) プログラム

笹岡晃征・斉藤誠一・伴　修平・工藤　勲・三宅秀男

水産海洋研究 62 403 - 404 1998.1

春期ブルーム期の噴火湾におけるカラノイダ橈脚類群集の遷移

伴　修平・宮川八尋・奥田義行・志賀直信

水産海洋研究 62 407 - 409 1998.1

渡島大沼、小沼、蓴莱沼の底泥表面から抽出されたリン濃度と植物プランクトン現存量

高野敬志・石川　靖・三上英敏・伴　修平・今田和史・安富亮平・竹内勝巳

北海道衛生研究所　所報 48 55 - 60 1998.1

Coastal Oyashio Multi-disciPlinary and Advanced Study (COMPAS) program using new ocean color remote sensing and intensive ship observations

Sasaoka, K., S.-i. Saitoh, S. Ban, I. Kudoh and H. Miyake

Memoirs of the Faculty of Fisheries, Hokkaido University 45 11 - 17 1998.1

The paradox of diatom-copepod interactions Reviewed

Ban, S., C. Burns, J. Castel, Y. Chaudron, E. Christou, R.Escribano, S.F.Umani, S.Gasparini, F.G. Ruiz, M.Hoffmeyer, A. Ianora, H.-K. Kang, M. Laabir, A. Lacoste, A. Miralto, X. Ning, S. Poulet, V. Rodriguez, J. Runge, J. Shi, M. Starr, S.-i. Uye and Y. Wang

Marine ecology progress series 157 287 - 293 1997.1

Diel vertical migration and feeding rhythm of Daphnia longispina and Bosmina corgoni in Lake Toya, Hokkaido, Japan. Reviewed

Makino, W., H. Haruna and S. Ban

Hydrobiologia 337 133 - 143 1996.1

Induction of diapause egg production in Eurytemora affinis by their own metabolites. Reviewed

Ban, S. and T. Minoda

Hydrobiologia 292/293 185 - 189 1994.1

Effect of temperature and food concentration on post-embryonic development, egg production and adult body size of calanoid copepod Eurytemora affinis. Reviewed

Ban, S

Journal of plankton research 16 721 - 735 1994.1

Hatching of diapause eggs of Eurytemora affinis (Copepoda: Calanoida) collected from Lake-bottom sediments Reviewed

Ban, S. and T. Minoda

Journal of Crustacean Biology 12 51 - 56 1992.1

Seasonal distribution, abundance and viability of diapause eggs of Eurytemora affinis (Copepoda: Calanoida) in the sediment of Lake Ohnuma, Hokkaido. Reviewed

Ban, S

Bulletin of Plankton Society Japan 39 41 - 48 1992.1

Effects of photoperiod, temperature and population density on induction of diapause egg production in Eurytemora affinis (Copepoda: Calanoida) in Lake Ohnuma, Hokkaido, Japan. Reviewed

Ban, S

Journal of Crustacean Biology 12 361 - 367 1992.1

The effect of temperature on the development and hatching of diapause and subitaneous eggs in Eurytemora affinis (Copepoda: Calanoida) in Lake Ohnuma, Japan. Reviewed

Ban, S. and T. Minoda

Bulletin of Plankton Society Japan special volume 299 - 308 1991.1

Seasonal distribution of Eurytemora affinis (Poppe, 1880)(Copepoda; Calanoida) in freshwater Lake Ohnuma, Hokkaido

Ban, S. and T. Minoda

Bulletin of the Faculty of Fisheries, Hokkaido University 40 147 - 153 1989.1

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