飯村 康夫 (イイムラ ヤスオ)

IIMURA Yasuo

写真a

職名

講師

メールアドレス

メールアドレス

出身学校 【 表示 / 非表示

  • 琉球大学  農学部  生産環境学科  2004年03月

出身大学院 【 表示 / 非表示

  • 神戸大学  自然科学研究科  修士課程  2007年03月

  • 神戸大学  農学研究科  博士課程  2010年03月

取得学位 【 表示 / 非表示

  • 博士(農学)  神戸大学  2011年03月

学内職務経歴 【 表示 / 非表示

  • 滋賀県立大学  環境科学部  生物資源管理学科  講師   2019年04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03月

所属学会・委員会 【 表示 / 非表示

  • 日本土壌肥料学会  

  • 日本腐植物質学会  

  • 日本生態学会  

  • 日本地球惑星科学連合  

委員歴・役員歴 【 表示 / 非表示

  • 日本土壌肥料学会常任編集委員   2016年04月 ~ 2018年03月

研究分野(科研費分類) 【 表示 / 非表示

  • 環境動態解析

  • 植物栄養学・土壌学

 

研究テーマ 【 表示 / 非表示

  • 土壌有機物の実態と機能に関する研究

    土壌 生態系 有機物 炭化物 資源

論文 【 表示 / 非表示

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

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

    Aquatic Sciences  Aquatic Sciences  80 (3)    2018年07月

    10.1007/s00027-018-0578-z  共著  

    [概要]

    © 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.

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

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

    Polar Science  Polar Science  16   59 ~ 67  2018年06月

    10.1016/j.polar.2018.03.003  共著  

    [概要]

    © 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.

  • 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

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

    Ecological Research  Ecological Research  32 (5)   713 ~ 724  2017年09月

    10.1007/s11284-017-1488-6  共著  

    [概要]

    © 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.

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

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

    Forests  Forests  8 (2)    2017年01月

    10.3390/f8020036  共著  

    [概要]

    © 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.

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

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

    Chemosphere  Chemosphere  177   51 ~ 55  2017年01月

    10.1016/j.chemosphere.2017.02.074  共著  

    [概要]

    © 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.

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

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

     Forests    2017年

    共著  共同(副担当)

  • High salinity leads to accumulateon of soil organic carbon in mangrove soil

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

     Chemosphere    2017年

    共著  

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

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

     Ecological Research    2015年

    共著  共同(副担当)

  • 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    2015年

    共著  共同(副担当)

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

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

     Journal of Forest Environment    2015年

    共著  共同(副担当)

全件表示 >>

著書 【 表示 / 非表示

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

    Ohtsuka T, Muraoka H, Saigusa N, Iimura Y, Koizumi H

    Springer, UK.  2015年

    単行本(学術書)  共著

研究シーズ 【 表示 / 非表示

  • 土壌学から環境問題を考える