2024/10/01 更新

写真a

イイムラ ヤスオ
飯村 康夫
IIMURA Yasuo
所属
環境科学研究院
部局
環境科学部 生物資源管理学科
職名
講師
外部リンク

私の一言メッセージ

  • 土壌中の様々な物質の動態と機能について生物地球化学的視点をベースに研究を行っています。また、これら土壌を軸とした自然界の仕組みを理解しつつ環境を考慮した農業への活用を探求しています。

学位

  • 博士(農学) ( 2011年3月   神戸大学 )

研究キーワード

  • 土壌学

  • 生態系生態学

  • 生物地球化学

  • プライミング効果

  • バイオ炭

経歴

  • 滋賀県立大学   環境科学部 生物資源管理学科   講師

    2019年4月 - 現在

  • 滋賀県立大学   環境科学部 生物資源管理学科   助教

    2013年11月 - 2019年3月

所属学協会

  • International Humic Substances Society

    2017年4月 - 現在

  • 日本腐植物質学会

    2006年8月 - 現在

  • 日本土壌肥料学会

    2005年8月 - 現在

研究分野

  • ライフサイエンス / 植物栄養学、土壌学

  • 環境・農学 / 環境動態解析

  • ライフサイエンス / 生態学、環境学

委員歴

  • Soil Science and Plant Nutrition編集委員  

    2023年10月 - 現在   

  • 日本腐植物質学会会計監査  

    2023年1月 - 現在   

研究シーズ

  • 土壌から地球温暖化問題を考える

論文

  • Effects of the co-application of glucose, nitrogen, and elevated temperature on buried black soil carbon in a cool temperate deciduous broad-leaved forest 査読

    Iimura Y, Tanaka D

    Forests   2024年6月

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  • Biomass recovery of coastal young mangrove plantations in Central Thailand 査読

    Scientific Reports   14 ( 1 )   2024年5月

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1038/s41598-024-61979-3

    その他リンク: https://www.nature.com/articles/s41598-024-61979-3

  • Decrease in Inorganic Nitrogen and Net Nitrogen Transformation Rates with Biochar Application in a Warm-Temperate Broadleaved Forest 査読

    Yasuki N, Saso W, Koizumi H, Iimura Y, Ohtsuka T, Yoshitake S

    Forests   2024年

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  • The Nitrogen Cycle of a Cool-Temperate Deciduous Broad-Leaved Forest 査読

    Ruoming Cao, Siyu Chen, Shinpei Yoshitake, Takeo Onishi, Yasuo Iimura, Toshiyuki Ohtsuka

    Forests   2024年

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  • Effect of livestock manure and compost on the quality and quantity of humic substances in soil 査読

    Kato T, Kondo M, Iimura Y, Ohshima H, Maeda Y, Fujitake N

    Humic Substances Research   19   9 - 15   2023年

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    記述言語:英語  

  • Organic carbon stock and composition in 3.5-m core mangrove soils (Trat, Thailand) 査読

    Kida M., Watanabe I., Kinjo K., Kondo M., Yoshitake S., Tomotsune M., Iimura Y., Umnouysin S., Suchewaboripont V., Poungparn S., Ohtsuka T., Fujitake N.

    Science of the Total Environment   801   149682 - 149682   2021年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Science of the Total Environment  

    Mangroves are increasingly recognized as an important component of regional and global carbon cycles especially for their high carbon storage capacity. Global estimation of mangrove soil organic carbon (SOC) storage requires detailed regional studies, but estimates of SOC data in deep soils are currently missing in many countries. Furthermore, little is explored on the molecular composition of mangrove SOC. Here, we assessed the SOC stock in a Trat mangrove forest (Thailand) by collecting deep soils (3.5 m) and analyzed the SOC composition for better understanding its potential sources and influencing factors. The Trat mangrove forest had four times higher SOC stock than has been considered for Thai mangrove forests, with the per-area SOC stock of nearly 1000 Mg C ha–1 which rivals that of Indo-Pacific mangrove forests. The SOC composition analyzed by C/N ratios and spectroscopic techniques differed by tree species and depth. Compositional data principal component analysis revealed that a biological factor (root abundance) had stronger influences than the soil texture (sand versus clay) on the abundance and composition of mangrove SOC. Although surface soil (~1 m) C density was largely controlled by the recent vegetation, deep soil C density reflected other historical processes. This study contributed to a refined estimate of Thailand mangrove SOC stock and revealed that factors influencing SOC abundance and composition differ by tree species and depth.

    DOI: 10.1016/j.scitotenv.2021.149682

    Scopus

  • Plant Species and biomass, soil respiration, soil environment data on Whapmagoostui-Kuujjuarapik, Quebec, Canada 査読

    Masumoto S, Kitagawa R, Nishizawa K, Kaneko R, Osono T, Hasegawa M, Iimura Y, Moti AS, Uchida M

    Polar Data Journal   5   80 - 88   2021年

  • Lateral export of dissolved inorganic and organic carbon from a small mangrove estuary with tidal fluctuation 査読

    Ohtsuka T., Onishi T., Yoshitake S., Tomotsune M., Kida M., Iimura Y., Kondo M., Suchewaboripont V., Cao R., Kinjo K., Fujitake N.

    Forests   11 ( 10 )   1 - 15   2020年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Forests  

    © 2020 by the authors. Licensee MDPI, Basel, Switzerland. The significance of aquatic lateral carbon (C) export in mangrove ecosystems highlights the extensive contribution of aquatic pathways to the net ecosystem carbon budget. However, few studies have investigated lateral fluxes of dissolved organic carbon (DOC) and inorganic carbon (DIC), partly due to methodological difficulty. Therefore, we evaluated area-based lateral C fluxes in a small mangrove estuary that only had one exit for water exchange to the coast. We sampled water from the mouth of the creek and integrated discharge and consecutive concentration of mangrove-derived C (∆C). Then, we estimated the area-normalized C fluxes based on the inundated mangrove area. DIC and DOC concentrations at the river mouth increased during ebb tide during both summer and winter. We quantified the ∆C in the estuary using a two-component conservative mixing model of freshwater and seawater. DIC and DOC proportions of ∆C concentrations at the river mouth during ebb tide was between 34% and 56% in the winter and 26% and 42% in the summer, respectively. DIC and DOC fluxes from the estuary were estimated to be 1.36 g C m−2 d−1 and 0.20 g C m−2 d−1 in the winter and 3.35 g C m−2 d−1 and 0.86 g C m−2 d−1 in the summer, respectively. Based on our method, daily fluxes are mangrove area-based DIC and DOC lateral exports that can be directly incorporated into the mangrove carbon budget.

    DOI: 10.3390/f11101041

    Scopus

  • Integrative assessment of the effects of shrub coverage on soil respiration in a tundra ecosystem 査読

    Masumoto S., Kitagawa R., Nishizawa K., Osono T., Hasegawa M., Iimura Y., Matsuoka S., Kaneko R., Uchida M., Mori A.S.

    Polar Science   27   2020年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Polar Science  

    © 2020 Elsevier B.V. and NIPR Shrub encroachment and soil respiration (SR) are predicted to increase in the tundra ecosystem under climate warming, but little is known regarding potential causal relationships between shrubs and SR at a local scale. Multiple and complex belowground processes exist between the two phenomena, and consolidation is logistically difficult. Our study aimed to identify and integrate multiple belowground processes to elucidate the impact of shrub coverage on SR, using structural equation modeling (SEM). Results indicated that shrub coverage enhanced SR through root biomass, fungal community composition and soil temperature. SEM also revealed a potential indirect effect via interactions among those soil factors. Soil factors relating heterotrophic respiration affected on SR through more complex interaction among the factors. However, total effect sizes on SR were similar between factors relating autotrophic respiration and that relating heterotrophic respiration, suggesting that SR increases with shrub coverage would be unlikely to result from decreases in soil organic matter.

    DOI: 10.1016/j.polar.2020.100562

    Web of Science

    Scopus

  • The mineralization rate of black soil carbon in the deep layers of Japanese volcanic ash soil may be easily accelerated by labile carbon supply 査読

    Iimura Y., Tanaka D., Nagao S., Fujitake N., Ohtsuka T.

    Soil Science and Plant Nutrition   2020年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Soil Science and Plant Nutrition  

    © 2020, © 2020 Japanese Society of Soil Science and Plant Nutrition. The stability of black soil carbon in the deep layers of Japanese volcanic ash soil (i.e., buried A horizons) is often explained by its unique chemical (molecular structure) and physical (associated with short-range-order minerals) recalcitrance. However, the stability of black soil C in buried A horizons may be changed by labile C supply for soil microbes. Here, we hypothesized that the mineralization of black soil C in buried A horizons of Japanese volcanic ash soil could be easily accelerated by a supply of labile C (i.e., a priming effect; PE). To test our hypothesis, we investigated the direction and magnitude of the PE with a buried A horizon in Japan using 13C-labeled glucose (2.188 atom %) in a short-term (21 days) incubation study. We also investigated the effect of mineral nitrogen (N), which could contribute to microbial activity in this incubation study. We found that a positive PE occurred by glucose supply with (182%) or without (181%) mineral N input over the 21-day incubation, and its values were very similar to the PE ratios previously reported in other deep soils. The estimated mean residence time (MRT) of black soil C considering PE was clearly accelerated by glucose supply, regardless of mineral N input, compared with the initial soil MRT. These results strongly support our hypothesis that the mineralization rate of black soil C in buried A horizons is easily accelerated by a labile C supply, and it also demonstrates important implications for the effects of global warming on buried A horizons (e.g., increased root exudation, fine root biomass supply, and N deposition) in Japanese volcanic ash soils.

    DOI: 10.1080/00380768.2020.1753481

    Scopus

  • 大白川ブナ・ミズナラ成熟林(old-growth forest)における土壌窒素無機化速度の空間変動解析 査読

    飯村 康夫, Vilanee Suchewaboripont, 廣田 充, 吉竹 晋平, 大塚 俊之

    日本土壌肥料学雑誌   2019年8月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  • 冷温帯落葉広葉樹林における林床ササ群落(Sasa senanensis)の有無が火山灰土壌の窒素無機化速度に及ぼす影響 査読

    飯村 康夫, 森田 悠介, 大塚 俊之

    日本土壌肥料学雑誌   2019年7月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  • Stand dynamics and aboveground net primary productivity of a mature subtropical mangrove forest on Ishigaki Island, south-western Japan 査読

    Ohtsuka T., Tomotsune M., Suchewaboripont V., Iimura Y., Kida M., Yoshitake S., Kondo M., Kinjo K.

    Regional Studies in Marine Science   27   2019年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Regional Studies in Marine Science  

    © 2019 Elsevier B.V. There are insufficient data regarding forest productivity of mature mangroves near the northern limit of mangrove distribution in subtropical East Asia. We conducted the present study to determine the stand dynamics and net primary production (NPP) of a mature mangrove forest on Ishigaki Island in south-western Japan over three successive years, using a large permanent plot. The two mangrove species present were Bruguiera gymnorrhiza and Rhizophora stylosa. The aboveground biomass in the plot was high, despite the high latitude (24 ∘ 29 ′ N) of the site, gradually increasing from 158.4 Mg ha −1 to 164.6 Mg ha −1 over the three-year study period. This increase was attributable to an increase in the biomass of B. gymnorrhiza. The biomass of R. stylosa, however, decreased during the same period because of a threefold-higher mortality rate and a lower relative growth rate of this species compared with B. gymnorrhiza. The mangrove forest was in the late successional stage, following a pioneer R. stylosa forest that was widely distributed throughout the study plot as standing dead trees and logs. The aboveground NPP of the mangrove forest was 10.66 ± 1.46 Mg ha −1 y −1 , partitioned into 3.10 ± 0.51 Mg ha −1 y −1 as woody NPP (net increase in aboveground woody parts, SI), and 7.56 ± 0.99 Mg ha −1 y −1 as foliage NPP (litter production, including foliage and reproductive organs, L n ). The mature mangrove forest had a relatively low SI/L n ratio (0.41 ± 0.03), although litter fall production was within the range previously recorded for mangroves. The lower woody NPP in the mature mangroves was due to the exclusion of R. stylosa once the stand was in a late successional stage dominated by B. gymnorrhiza.

    DOI: 10.1016/j.rsma.2019.100516

    Scopus

  • Soil carbon stocks and their primary origin at mature mangrove ecosystems in the estuary of Fukido River, Ishigaki Island, southwestern Japan 査読

    Iimura Y., Kinjo K., Kondo M., Ohtsuka T.

    Soil Science and Plant Nutrition   65 ( 5 )   435 - 443   2019年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Soil Science and Plant Nutrition  

    © 2019, © 2019 Japanese Society of Soil Science and Plant Nutrition. Mangrove ecosystems play an important role in carbon (C) accumulation in tropical and subtropical regions. Below-ground deep anoxic soil is especially important for C accumulation. However, quantitative data on below-ground soil C stocks in mangrove ecosystems are lacking compared with data on above-ground biomass. In addition, soil C accumulation processes in mangrove ecosystems have not been sufficiently clarified. In this study, we quantified soil C stocks and focused on the mass of fallen litter and below-ground roots, which are produced by tree and that may directly influence soil C stocks in a mature subtropical mangrove in the estuary of Fukido River, Ishigaki Island, southwestern Japan. The principal species in this study site were Bruguiera gymnorhiza and Rhizophora stylosa, and total above-ground biomass at the site was 80.7 ± 1.3 (mean ± SD) Mg C ha−1 over the period from 2014 to 2016. Litter was collected in six litter traps from May 2013 to November 2016, it ranged from 7.8 to 11.5 Mg C ha−1, with the major proportion of litter being from foliage (leaves and stipules). The root C density at 90-cm depth was 27.1 ± 11.3 Mg C ha−1. The soil C stock in the mangrove forest at a depth of 90 cm at the study site was 251.0 ± 34.8 Mg C ha−1, and it seems to be lower value in the tropical region but it to be higher in subtropical East Asian mangrove sites. Dead roots, especially dead fine roots, but not fallen litter, were significantly positively correlated with soil C stocks. The δ13C values obtained from soils ranged from −29.3‰ to −27.0‰; these values are consistent with those for below-ground fine roots. These results strongly suggest that dead fine roots could be a main factor controlling soil C stocks at this study site.

    DOI: 10.1080/00380768.2019.1660589

    Scopus

  • Harmonized data on early stage litter decomposition using tea material across Japan 査読

    Satoshi N. Suzuki, Mioko Ataka, Ika Djukic, Tsutomu Enoki, Karibu Fukuzawa, Mitsuru Hirota, Takuo Hishi, Tsutom Hiura, Kazuhiko Hoshizaki, Hideyuki Ida, Akira Iguchi, Yasuo Iimura, Takeshi Ise, Tanaka Kenta, Yoshifumi Kina, Hajime Kobayashi, Yuji Kominami, Hiroko Kurokawa, Kobayashi Makoto, Michinari Matsushita, Rie Miyata, Hiroyuki Muraoka, Tatsuro Nakaji, Masahiro Nakamura, Shigeru Niwa, Nam J. Noh, Takanori Sato, Tatsuyuki Seino, Hideaki Shibata, Ryo O. Suzuki, Koichi Takahashi, Tomonori Tsunoda, Tasuhiro Ustumi, Kenta Watanabe

    Ecological Research   34   575 - 576   2019年

  • Priming effect of Miscanthus sinensis derived biochar on brown forest soil 査読

    Iimura Y., Natsuhara M., Ohtsuka T., Tomotsune M., Yoshitake S., Koizumi H.

    Soil Science and Plant Nutrition   65 ( 6 )   550 - 556   2019年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Soil Science and Plant Nutrition  

    © 2019, © 2019 Japanese Society of Soil Science and Plant Nutrition. The role of biochar in the mitigation of CO2 emissions has been extensively studied in agricultural soils but is not well understood in Japanese forest soils, especially in relation to CO2 emissions from applied biochar and native soil C (i.e., the priming effect; PE). We hypothesized that the type of biochar and/or the application method (mixed or sprinkled) affect the direction and magnitude of PE in forest soil, and in particular, negative PE can be achieved relatively easily if biochar produced under higher temperature conditions were sprinkled on the soil surface. To test our hypothesis, we measured CO2 emissions from biochar-amended brown forest soil in Japan and examined its PE by conducting a medium-term (~4 months) incubation study. As substrates, we used plain straw from the C4 grass Miscanthus sinensis (SU) and two qualities of biochar produced from it at either 300°C (BC300) or 800°C (BC800) and compared two application methods: mixed into or sprinkled onto the soil. BC800 had a greater C content and C:N ratio as well a lower volatile matter content and higher nonvolatile matter content than BC300. SU had the lowest C content and C:N ratio of all the substrates. We found that biochar quality (volatile and nonvolatile matter content) was clearly related to the decomposition rate when mixed into the soil, but we could not find this relationship when biochar was sprinkled onto the soil. The addition of biochar to the soil induced a positive PE in the early stages (except for BC800 sprinkled) but suppressed CO2 emissions from native soil organic matter (negative PE) in the later stages, whereas the PE with SU application was always positive regardless of application method. Our results suggest that when biochar is sprinkled onto soil it is more likely to suppress soil-derived CO2 emission than when mixed in soil; however, the trend based on biochar quality was unclear.

    DOI: 10.1080/00380768.2019.1672101

    Scopus

  • Priming effect of the addition of maize to a Japanese volcanic ash soil and its temperature sensitivity: a short-term incubation study 査読

    Iimura Y., Tabara I., Izumitsu K., Fujitake N.

    Soil Science and Plant Nutrition   2019年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Soil Science and Plant Nutrition  

    © 2019, © 2019 Japanese Society of Soil Science and Plant Nutrition. The response of soil organic matter (SOM) to global warming is a crucial subject. However, the temperature sensitivity of SOM turnover remains largely uncertain. Changes in the mineralization of native SOM, i.e., priming effect (PE) may strongly affect the temperature sensitivity of SOM turnover in the presence of global warming. We investigated the direction and magnitude of the PE in a Japanese volcanic ash soil at different temperatures (15°C, 25°C, and 35°C) using a natural 13C tracer (C4-plant, maize leaf) in a short-term (25 days) incubation study. In addition, we evaluated the temperature sensitivity expressed as Q10 value with and without the addition of maize to the soil and their relations to PE. We found that positive PE occurred at each temperature condition and tended to increase with decreased temperature, and these PE results were consistent with the microbial biomass at the end of the incubation period. CO2 emission from control soil (without maize) increased with increasing temperature (Q10 = 2.6), but CO2 emission from the soil with added maize did not significantly change with increasing temperature (Q10 = 1.0). This was caused by the suppression of CO2 emission from the soil with increasing temperature (Q10 = 0.9). On the other hand, soil-originated CO2 emission clearly increased with increasing temperature (Q10 = 3.4) when Q10 values were calculated on the assumption that the temperature and substrate supply increase at the same time (from 25°C). These results suggest that not only the temperature increase but also the labile carbon supply may be important for the temperature sensitivity of Japanese volcanic ash soil.

    DOI: 10.1080/00380768.2019.1665969

    Scopus

  • Contribution of humic substances to dissolved organic matter optical properties and iron mobilization 査読

    Kida M., Fujitake N., Suchewaboripont V., Poungparn S., Tomotsune M., Kondo M., Yoshitake S., Iimura Y., Kinjo K., Maknual C., Ohtsuka T.

    Aquatic Sciences   80 ( 3 )   2018年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Aquatic Sciences  

    © 2018, Springer International Publishing AG, part of Springer Nature. Humic substances (HS) are the primary constituents of dissolved organic matter (DOM) and play pivotal roles in aquatic systems. Optical indices of DOM, such as specific UV absorbance (SUVA254), the fluorescence index (FI) and biological index (BIX), have gained wide interest because of their ease of use. In this study, we explored the relationship between HS and the indices in the Trat River Basin (eastern Thailand) from headwaters to the river mouth through the distinct dry and rainy seasons to examine whether changes in index values reflect variability in the relative contribution of HS to DOM, or %HS. The results show that %HS and the indices did not exhibit significant linear relationships (FI and BIX, P > 0.05), or the relationships changed seasonally (SUVA254). However, analyzing the indices versus %HS did show clear DOM composition changes by season with more humic-like or terrestrial material in the rainy season. Relationships between DOM and dissolved iron (dFe) concentrations were also explored. Separating the relationships of DOM versus dFe into HS versus dFe and non-HS versus dFe provides us the opportunity to better understand which fraction contributes more to dFe mobilization. The results indicate stronger positive linear relationships between HS and dFe concentrations independent of river tributary. Overall, this study highlights the importance of quantifying HS for the study of DOM dynamics or compositional changes along a river transect as well as for DOM-induced iron mobilization.

    DOI: 10.1007/s00027-018-0578-z

    Scopus

  • Soil microbial succession along a chronosequence on a High Arctic glacier foreland, Ny-Ålesund, Svalbard: 10 years’ change 査読

    Yoshitake S., Uchida M., Iimura Y., Ohtsuka T., Nakatsubo T.

    Polar Science   16   59 - 67   2018年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Polar Science  

    © 2018 Elsevier B.V. and NIPR Rapid glacial retreat in the High Arctic causes the expansion of new habitats, but the successional trajectories of soil microbial communities are not fully understood. We examined microbial succession along a chronosequence twice with a 10-year interval in a High Arctic glacier foreland. Soil samples were collected from five study sites with different ages and phospholipid fatty acids analysis was conducted to investigate the microbial biomass and community structure. Microbial biomass did not differ significantly between the two sampling times but tended to increase with the chronosequence and showed a significant correlation with soil carbon (C) and nitrogen (N) content. Microbial community structure clearly differed along the chronosequence and was correlated with C and N content. The largest shift in community structure over 10 years was observed in the newly exposed sites after deglaciation. The accumulation of soil organic matter was regarded as an important determinant both of microbial biomass and community structure over the successional period. In contrast, the initial microbial community on the newly exposed soil changed rapidly even in the High Arctic, suggesting that some key soil processes such as C and N cycling can also shift within the relatively short period after rapid glacial retreat.

    DOI: 10.1016/j.polar.2018.03.003

    Scopus

  • Effects of soil temperature and tidal condition on variation in CO2 flux from soil sediment in a subtropical mangrove forest 査読

    Tomotsune M, Yoshitake S, Iimura Y, Kida M, Fujitake N, Koizumi H, Ohtsuka T

    Journal of Tropical Ecology   34 ( 268 )   275   2018年

  • Dissolved organic carbon (DOC) input to the soil: DOC fluxes and their partitions during the growing season in a cool-temperate broad-leaved deciduous forest, central Japan 査読

    Chen S., Yoshitake S., Iimura Y., Asai C., Ohtsuka T.

    Ecological Research   32 ( 5 )   713 - 724   2017年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Ecological Research  

    © 2017, The Ecological Society of Japan. Dissolved organic carbon (DOC) plays an important role in C cycling in forest ecosystems. Here we measured the concentrations and fluxes of DOC in a cool-temperate broad-leaved deciduous forest (Takayama Forest) to quantify the contribution of DOC from different forest water flux conditions. Mean DOC concentration during the growing season increased in the sequence from bulk precipitation (2.98 ± 0.45 mg L−1), throughfall above dwarf bamboo (6.84 ± 0.45 mg L−1), throughfall below dwarf bamboo (7.08 ± 0.42 mg L−1), stemflow (15.05 ± 0.98 mg L−1), and litter leachate (21.33 ± 1.01 mg L−1). Litter leachate DOC concentration, being high in spring and autumn, which was fairly correlated with the amount of litterfall of bamboo and trees. In stemflow, the DOC concentration was high during early summer and gradually decreased, in addition, it also showed dramatic variation among different plant species. Litter leachate (72.5%) accounted for most of the DOC input to the soil during the growing season (311.5 kg C ha−1 7 months−1), while stemflow (1.6%) contributed the least. A great quantity of precipitation at the study site was associated with a subsequent high atmospheric contribution of DOC flux (8.6%), which was more than half of throughfall (16.5%). The high input of DOC to the soil and andisol soil characteristics at the Takayama Forest suggest that the DOC fluxes are vital to the soil carbon sequestration. Therefore, DOC fluxes should be taken into account when the carbon balance is assessed at forest ecosystems.

    DOI: 10.1007/s11284-017-1488-6

    Web of Science

    Scopus

  • High salinity leads to accumulation of soil organic carbon in mangrove soil 査読

    Kida M., Tomotsune M., Iimura Y., Kinjo K., Ohtsuka T., Fujitake N.

    Chemosphere   177   51 - 55   2017年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Chemosphere  

    © 2017 Although mangrove forests are one of the most well-known soil organic carbon (SOC) sinks, the mechanism underlying SOC accumulation is relatively unknown. High net primary production (NPP) along with the typical bottom-heavy biomass allocation and low soil respiration (SR) have been considered to be responsible for SOC accumulation. However, an emerging paradigm postulates that SR is severely underestimated because of the leakage of dissolved inorganic carbon (DIC) in groundwater. Here we propose a simple yet unique mechanism for SOC accumulation in mangrove soils. We conducted sequential extraction of water extractable organic matter (WEOM) from mangrove soils using ultrapure water and artificial seawater, respectively. A sharp increase in humic substances (HS) concentration was observed only in the case of ultrapure water, along with a decline in salinity. Extracted WEOM was colloidal, and ≤70% of it re-precipitated by the addition of artificial seawater. These results strongly suggest that HS is selectively flocculated and maintained in the mangrove soils because of high salinity. Because sea salts are a characteristic of any mangrove forest, high salinity may be one of mechanisms underlying SOC accumulation in mangrove soils.

    DOI: 10.1016/j.chemosphere.2017.02.074

    Web of Science

    Scopus

  • Spatial upscaling of soil respiration under a complex canopy structure in an old-growth deciduous forest, central Japan 査読

    Suchewaboripont V., Ando M., Yoshitake S., Iimura Y., Hirota M., Ohtsuka T.

    Forests   8 ( 2 )   2017年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Forests  

    © 2017 by the authors; licensee MDPI, Basel, Switzerland. The structural complexity, especially canopy and gap structure, of old-growth forests affects the spatial variation of soil respiration (Rs). Without considering this variation, the upscaling of Rs from field measurements to the forest site will be biased. The present study examined responses of Rs to soil temperature (Ts) and water content (W) in canopy and gap areas, developed the best fit model of Rs and used the unique spatial patterns of Rs and crown closure to upscale chamber measurements to the site scale in an old-growth beech-oak forest. Rs increased with an increase in Ts in both gap and canopy areas, but the effect of W on Rs was different between the two areas. The generalized linear model (GLM) analysis identified that an empirical model of Rs with the coupling of Ts and W was better than an exponential model of Rs with only Ts. Moreover, because of different responses of Rs to W between canopy and gap areas, it was necessary to estimate Rs in these areas separately. Consequently, combining the spatial patterns of Rs and the crown closure could allow upscaling of Rs from chamber-based measurements to the whole site in the present study.

    DOI: 10.3390/f8020036

    Web of Science

    Scopus

  • Change in biomass of an old-growth beech-oak forest on the eastern slope of Mt. Hakusan over a 17-year period. 査読

    Suchewaboripont V, Iimura Y, Yoshitake S, Kato S, Komiyama A, Ohtsuka T

    Journal of Forest Environment   2015年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  • The effect of canopy structure on soil respiration in an old-growth beech forest in central Japan. 査読

    Suchewaboripont V, Ando M, Iimura Y, Yoshitake S, Ohtsuka T

    Ecological Research   2015年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  • Role of coarse woody debris in the carbon cycle of Takayama forest, central Japan. 査読

    Ohtsuka T, Shizu Y, Hirota M, Yashiro Y, Jia S, Iimura Y, Koizumi H

    Ecological Research   2014年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  • Investigations of environmental changes based on chemical analyses of humic substances. 査読

    Kawahigashi M, Ono K, Iimura Y, Fujitake N

    Humic Substances Research   2013年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  • Carbon cycling and sequestration in a Japanese red pine (Pinus densiflora) forest on lava flow of Mt Fuji. 査読

    Ohtsuka T, Negishi M, Sugita K, Iimura Y, Hirota M

    Ecological Research   2013年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   参加形態:共同(副担当)  

  • Comparison of quantity and quality of soil organic carbon between matured and gap areas in an old-growth beech forest. 査読

    Iimura Y, Hirota M, Ida H, Ohtsuka T

    Journal of Geography   2013年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   参加形態:共同(主担当)  

  • Investigation of the composition and origin of particle organic matter in a forested river. 査読

    Li W, Numata T, Kobayashi S, Yamada T, Li F, Ohtsuka T, Iimura Y

    Journal of Water and Environment Technology   2013年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   参加形態:共同(副担当)  

  • Black humic acid dynamics during natural reforestation of Japanese pampas grass (Miscanthus sinensis). 査読

    Iimura Y, Fujimoto M, Tamura K, Higashi T, Kondo M, Uchida M, Yonebayashi K, Fujitake N

    Soil Biology and Biochemistry   2013年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   参加形態:共同(主担当)  

  • Characterization of DAX-8 adsorbed soil fulvic acid fractions by various types of analyses. 査読

    Iimura Y, Ohtani T, Chersich S, Tani M, Fujitake N

    Soil Science and Plant Nutrition   2012年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  • The effect of dense dwarf bamboo (Sasa senanensis) understory on soil respiration before and after clearcutting of cool temperate deciduous broad-leaved forest. 査読

    Yashiro Y, Shizu Y, Adachi T, Ohtsuka T, Lee N, Iimura Y, Koizumi H

    Ecological Research   2012年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  • Molecular size fractionation of soil humic acids using preparative high performance size-exclusion chromatography. 査読

    Asakawa D, Iimura Y, Kiyota T, Yanagi Y, Fujitake N

    Journal of Chromatography A   2011年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  • Effects of ecological succession on surface mineral horizons in Japanese volcanic ash soil. 査読

    Iimura Y, Fujimoto M, Hirota M, Tamura K, Higashi T, Yonebayashi K, Fujitake N

    Geoderma   2010年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

▼全件表示

書籍等出版物

  • 琵琶湖集水域の環境メタロミクス

    原田, 英美子 他( 担当: 分担執筆)

    アグネ技術センター  2024年8月  ( ISBN:9784867070185

     詳細を見る

    総ページ数:xviii, 299p   記述言語:日本語  

    CiNii Books

  • Ecological significance of throughfall and stemflow to he carbon cycle in forest ecosystems

    Chen S, Cao R, Yoshitake S, Iimura Y, Ohtsuka T( 担当: 共著)

    Springer  2022年 

     詳細を見る

    記述言語:英語   著書種別:学術書

  • Biometric-Based Estimations of Net Primary Production (NPP) in Forest Ecosystems.

    Ohtsuka T, Muraoka H, Saigusa N, Iimura Y, Koizumi H( 担当: 共著)

    Springer, UK.  2015年 

     詳細を見る

    記述言語:英語   著書種別:学術書

MISC

  • 伊吹山のヨモギと黒色火薬の生産・琵琶湖集 水域の環境メタロミクス連載第 12 回

    飯村康夫・水野隆文・原田英美子

    金属   92   1092 - 1099   2022年

  • 水稲インディカ品種 Kasakath に由来する 2 種類の低リン応答性 QTL のコシヒカリへの集積

    山本竜也・小梶裕之・田端友樹・飯村康夫・清水顕史

    作物研究   60   2015年

  • 日本の土壌炭素賦存量を量・質の両面から考える

    川東正幸・高橋正・藤井一至・高橋正通・三浦覚・石塚成宏・金子進司・白戸康人・矢 ケ崎秦海・高田祐介・和穎郎太・岸本文紅・米村正一郎・平館俊太郎・渡邊眞紀子・泉 岳樹・藤嶽暢英・飯村康夫

    日 本土壌肥料学会誌   84   145 - 150   2013年

  • 野外研究サイトから(23) 高山(たかやま) サイト

    飯村康夫・大塚俊之・村岡裕由

    日本生態学会誌   2013年

  • 志賀高原カヤノ平ブナ成熟林における 土壌有機物の特徴

    飯村康夫・廣田充・井田秀行・大塚俊之

    信州大学教育学部付属志賀自然教育研究施設研究業績   49   1 - 5   2012年

  • 志賀高原カヤノ平ブナ成熟林における 土壌有機物の特徴

    飯村康夫・廣田充・井田秀行・大塚俊之

    信州大学教育学部付属志賀自然教育研究施設研究業績   49   1 - 5   2012年

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    記述言語:日本語  

  • Potential of soil carbon sequestration at Takayama flux site

    Iimura Y, Ohtsuka T

    Proceedings of the 3th ASIA HORCs joint symposium   2011年

  • 志賀高原カヤ の平ブナ林における炭素循環モニタリング I. 時空間的に不均一な土壌呼吸量の測定法 の検討

    廣田充・八代裕一郎・飯村康夫・志津庸子・大塚俊之・井田秀行

    信州大学教育学部付属志賀自然教育研究施設研究業績   48   9 - 14   2011年

  • Effects of ecological succession on chemical characteristics of humic and fulvic acids in a Japanese volcanic ash soil

    Iimura Y, Hirota M, Tamura K, Higashi T, Fujitake N

    Proceedings of the 19th World Congress of Soil Science, Soil Solutions for a changing   2010年

  • Effects of ecological succession on the characteristics of soil humic substances in a Japanese volcanic ash soil II. Chemical properties and stabilities of different size fractions of humic acids

    Iimura Y, Hirota M, Tamura K, Higashi T, Fujitake N

    Proceedings of the International Symposium on Soil Organic Matter Dynamics: Land use, Management and Global Change, p196 in Abstract book   2009年

  • Effects of ecological succession on the characteristics of soil humic substances in a Japanese volcanic ash soil I. Concentration and chemical properties of humic substances

    Fujitake N, Iimura Y, Hirota M, Tamura K, Higashi T

    Proceedings of the International Symposium on Soil Organic Matter Dynamics: Land use, Management and Global Change   2009年

▼全件表示

共同研究・競争的資金等の研究課題

  • 降水レジーム変動を考慮した複合影響因子による土壌炭素の温暖化ダイナミクス

    2024年4月 - 2027年3月

    科研費 

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    担当区分:研究代表者 

  • 重炭酸化に着目したマングローブ林における新たな二酸化炭素吸収経路の探究

    2024年4月 - 2025年3月

    アサヒグループ財団学術研究助成 

      詳細を見る

    担当区分:研究代表者 

  • 水田でのバイオ炭施用は正味のCO2吸収量をどれだけ向上できるのか?

    2023年4月 - 2024年3月

    滋賀県立大学特別研究(脱炭素) 

      詳細を見る

    担当区分:研究代表者 

  • 森林へのバイオ炭施用によるCO2放出の削減と生態系サービスの強化に関する関する研究

    2022年4月 - 2025年3月

    環境研究総合推進費 

      詳細を見る

    担当区分:研究分担者 

  • 荒廃地へのマングローブの植林は生態系炭素貯留量をどのくらい増大させるか

    2021年4月 - 2026年3月

    科研費  国際共同研究加速基金(国際共同研究強化(B))

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    担当区分:研究分担者 

  • バイオ炭を活用した次世代型水田稲作農法:生態系サービスの向上を目指して

    2020年4月 - 2023年3月

    滋賀県立大学高度化研究教育促進費 

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    担当区分:研究代表者 

  • 温暖化インパクトを包括的に考慮した土壌炭素応答解析:プライミング効果に着目して

    2020年4月 - 2023年3月

    科研費  基盤研究(C)

      詳細を見る

    担当区分:研究代表者 

  • プライミング効果による土壌炭素分解:温暖化応答メカニズムの解明

    2017年4月 - 2020年3月

    科研費  基盤研究(C)

      詳細を見る

    担当区分:研究代表者 

  • 植生履歴が草原の生物圏に与える影響:古い草原の歴史的価値

    2017年4月 - 2020年3月

    科研費  基盤研究(C)

      詳細を見る

    担当区分:研究分担者 

  • バイオチャーを活用した次世代型水田土壌の創生

    2017年4月 - 2018年3月

    滋賀県立大学特別研究 

      詳細を見る

    担当区分:研究代表者 

  • バイオチャーを用いた森林における炭素隔離効果と生態系応答応答機構の解明

    2015年4月 - 2019年3月

    科研費  基盤研究(A)

      詳細を見る

    担当区分:研究分担者 

  • タイ王国トラート川河口マングローブ林における土壌生態学的研究

    2015年4月 - 2018年3月

    科研費  基盤研究(B)

      詳細を見る

    担当区分:研究協力者 

  • マングローブ林のミッシング炭素-分解呼吸によるCO2はどこに行く?-

    2015年4月 - 2017年3月

    科研費  挑戦的萌芽研究

      詳細を見る

    担当区分:研究分担者 

  • 土壌炭素の温暖化応答に及ぼすプライミング効果の定量的評価

    2015年4月 - 2017年3月

    科研費  若手研究(B)

      詳細を見る

    担当区分:研究代表者 

  • バイオ炭を用いた水田稲作農法の科学的検証-高生産性と環境負荷低減の両立は可能か?-

    2014年4月 - 2015年3月

    ニッセイ財団助成 

      詳細を見る

    担当区分:研究代表者 

  • 多様な土壌炭素の分解反応に及ぼすプライミング効果の定量的評価

    2013年4月 - 2015年3月

    科研費  若手研究(B)

      詳細を見る

    担当区分:研究代表者 

  • ギャップ・モザイク構造を考慮した成熟林の炭素吸収能力の再評価

    2012年4月 - 2016年3月

    科研費  基盤B

      詳細を見る

    担当区分:研究分担者 

  • 森林の窒素吸収速度が難分解性土壌有機物分解プロセスに及ぼす影響の定量的評価

    2012年4月 - 2013年3月

    岐阜大学活性化経費 

      詳細を見る

    担当区分:研究代表者 

  • 植物-土壌間での窒素循環が腐植特性変化に及ぼす影響の定量的評価

    2011年4月 - 2012年3月

    岐阜大学活性化経費 

      詳細を見る

    担当区分:研究代表者 

▼全件表示

講演・口頭発表等

  • タイ王国トラート川河口マングローブ林における植生・深度別土壌有機物の分光学的特徴

    渡邉育弥, 木田森丸, SUCHEWABORIPONT Vilanee, POUNGPARN Sasitorn, 友常満利, 友常満利, 近藤美由紀, 吉竹晋平, 飯村康夫, 金城和俊, MAKNUAL Chatree, 大塚俊之, 藤嶽暢英

    日本土壌肥料学会講演要旨集(Web)  2019年 

     詳細を見る

    開催年月日: 2019年

  • マングローブの生態系純生産量(NEP)は本当に大きいのか?

    大塚俊之, 荒井秀, 友常満利, 吉竹晋平, 大西健夫, 藤嶽暢英, 木田森丸, 近藤美由紀, 飯村康夫, 金城和俊

    日本生態学会大会講演要旨(Web)  2018年 

     詳細を見る

    開催年月日: 2018年

    記述言語:日本語  

  • 石垣島吹通川マングローブ林における炭素循環と生態系純生産量

    大塚俊之, 大西健夫, 吉竹晋平, 荒井秀, 友常満利, 藤嶽暢英, 木田森丸, 近藤美由紀, 飯村康夫, 金城和俊

    日本地球惑星科学連合大会予稿集(Web)  2018年 

     詳細を見る

    開催年月日: 2018年

    記述言語:日本語  

  • 異なる植生,地形および地質特徴のマングローブ林内の堆積炭素

    金城和俊, 木田森丸, 飯村康夫, 藤嶽暢英, SASITORN Poungparn, 大塚俊之

    日本土壌肥料学会講演要旨集  2018年 

     詳細を見る

    開催年月日: 2018年

  • マングローブ林内土壌への海水塩によるフミン酸の選択的蓄積

    木田森丸, 田邉舞, 友常満利, 飯村康夫, 金城和俊, 近藤美由紀, POUNGPARN Sasitorn, 大塚俊之, 藤嶽暢英

    日本土壌肥料学会講演要旨集  2016年 

     詳細を見る

    開催年月日: 2016年

  • 高緯度北極湿原におけるCH4,N2Oフラックスの空間および季節変動

    大浦典子, 岸本(莫)文紅, 米村正一郎, 廣田充, 飯村康夫, 内田雅己, 内田雅己, 増本翔太, 中坪孝之

    日本生態学会大会講演要旨(Web)  2016年 

     詳細を見る

    開催年月日: 2016年

    記述言語:日本語  

  • 北極ツンドラ湿地生態系における生態系純生産量の推定

    内田雅己, 廣田充, 岸本(莫)文紅, 神田啓史, 大浦典子, 飯村康夫, 中坪孝之

    日本生態学会大会講演要旨(Web)  2016年 

     詳細を見る

    開催年月日: 2016年

    記述言語:日本語  

  • Tea Bagを用いた分解活性指標:標高・土壌温暖化・リター量処理の影響

    鈴木智之, 井田秀行, 小林元, 高橋耕一, NOH Nam‐Jin, 村岡裕由, 廣田充, 清野達之, 鈴木亮, 田中健太, 飯村康夫, 角田智詞, 丹羽慈, 日浦勉

    日本生態学会大会講演要旨(Web)  2015年 

     詳細を見る

    開催年月日: 2015年

    記述言語:日本語  

  • 高緯度北極のコケツンドラにおけるCO<sub>2</sub>フラックスの推定

    内田雅己, 内田雅己, 廣田充, 岸本(莫)文紅, 神田啓史, 大浦典子, 飯村康夫, 増本翔太, 中坪孝之

    極域科学シンポジウム講演予稿集(CD-ROM)  2015年 

     詳細を見る

    開催年月日: 2015年

    記述言語:日本語  

  • 成熟林では林冠構造によって土壌呼吸の日変化の制御要因が異なる―カヤノ平ブナ林における研究―

    西村貴皓, 飯村康夫, 井田秀行, 廣田充

    日本生態学会大会講演要旨(Web)  2015年 

     詳細を見る

    開催年月日: 2015年

    記述言語:日本語  

  • マングローブ林内土壌における脱塩洗浄が溶存有機物の溶出に及ぼす影響

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