Faculty Profiles - BAN Syuhei

Papers - BAN Syuhei

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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

Scopus

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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

Scopus

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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

Scopus

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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

Scopus

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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

Scopus

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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

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Papers - BAN Syuhei