担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Springer Science and Business Media LLC  

Terraced paddy field landscapes in valleys have linear seminatural grasslands on surfaces adjacent to forest and paddy fields. Paddy levees are traditionally managed by regular mowing and burning, and such landscapes are important habitat for biological communities. Furthermore, these biological communities may contribute to organic matter decomposition in paddy levees. However, seminatural grasslands on paddy levees have recently decreased in Japan due to the use of herbicides. Therefore, we investigated the effects of burning and herbicide disturbances on microenvironmental factors, soil animal communities, and organic matter decomposition. Nine experimental belt transects were set up at paddy levees located on Sado Island, Japan. The burning and herbicide experiments were performed three times per year. The investigations were performed before the experiments and after the first and third experiments. The soil moisture, litter amount, pH, and electrical conductivity were measured as microenvironmental factors. Soil animals were collected and were classified into soil macrofauna and mesofauna. The organic matter decomposition rate was measured using the Bait-Lamina test. In the burning plot, the litter amount and the soil macrofauna abundance decreased after the first experiment. In the herbicide plot, the litter amount, the soil macrofauna abundance, and organic matter decomposition rate increased after the first experiment. Furthermore, with repeated herbicide spraying, the values of these parameters decreased. However, soil mesofauna abundance after the third experiment was not significantly different between all experimental plots. The change in the litter amount was different for each experiment. Furthermore, the changes in litter amount and the soil macrofauna abundance tended to coincide. Additionally, the current paper suggested that soil mesofauna community was less affected by burning and herbicide spraying compared to soil macrofauna.

DOI： 10.1007/s42729-021-00646-2

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その他リンク： https://link.springer.com/article/10.1007/s42729-021-00646-2/fulltext.html

担当区分：筆頭著者,　責任著者   記述言語：日本語   出版者・発行元：公益社団法人 農業農村工学会  

<p>里山の景観構成要素の接合部では, 生物の移動等を介して双方の景観要素が持つ物質循環機能が維持されてきたとされる．本研究では, 里山の森林と水田畦畔の接続性に着目し, これが生物群集や物質循環機能に与える影響を評価した．調査は, 新潟県佐渡市の伝統的な畦畔管理がなされた地域と基盤整備が施された圃場で現代的な畦畔管理がなされた地域で行い, 森林と水田畦畔の接続性が異なる環境間で微少環境要因, 土壌動物群集, 有機物分解率を比較した．その結果, 林縁構造が存在する接合部ではリター量が増加し, 林縁付近の有機物分解率が増大した．また, 林縁部が分断された畦畔では, 捕食者の個体数密度の低下, デコンポーザーとシュレッダーの個体数密度の増加, 有機物分解率の増大がみられた．森林と農地が隣接する場合でも, その接続性の違いにより林縁部の物質循環機能が異なることが示唆された．</p>

DOI： 10.11408/jsidre.88.I_165

CiNii Article

CiNii Books

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記述言語：日本語  

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記述言語：日本語  

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記述言語：日本語  

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記述言語：日本語  

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