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タイトル: | Ecological functions of persistent Japanese cedar litter in structuring stream macroinvertebrate assemblages |
著者: | Sakai, Masaru Natuhara, Yosihiro Fukushima, Keitaro Imanishi, Ayumi Imai, Kensuke Kato, Makoto |
著者名の別形: | 境, 優 |
キーワード: | Denudation Forest floor cover Overland flow Sediment runoff Shredders |
発行日: | Apr-2013 |
出版者: | Springer Japan |
誌名: | Journal of Forest Research |
巻: | 18 |
号: | 2 |
開始ページ: | 190 |
終了ページ: | 199 |
抄録: | Stream macroinvertebrate assemblages are expected to be affected by the abundance and constitution of litter from surrounding forests. We compared forest floor cover, overland flow, stream environment, and stream macroinvertebrate assemblages between the catchments of a Japanese cedar plantation (CP) and a primary deciduous forest (DF). Both systems experience excessive deer browsing. Understory vegetation cover was higher in the DF than in the CP in summer, although cover was low (<20 %), possibly because of excessive deer browsing. Litter cover was much higher in the CP than in the DF in summer as a result of the long abscission period, slow breakdown, and low rate of dispersal of Japanese cedar litter compared to deciduous litter. Monthly overland flow was always lower in the CP than in the DF, and substrate size was smaller in the DF stream. In the CP, cedar litter accumulated in the stream, probably because of its low breakdown rate and morphology, and abundant shredder taxa characterized the macroinvertebrate assemblage. In contrast, abundant burrower taxa characterized the macroinvertebrate assemblage in the DF stream. These results imply that Japanese cedar litter functions in structuring the macroinvertebrate assemblage by supplying persistent food resources for detritivores, and by buffering fine sedimentation via overland flow under excessive deer browsing. |
著作権等: | The final publication is available at www.springerlink.com This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/173124 |
DOI(出版社版): | 10.1007/s10310-012-0339-0 |
出現コレクション: | 学術雑誌掲載論文等 |
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