2011 Fiscal Year Final Research Report
Structures of arthropod communities involved in the grazing and detrital food webs and their functioning in a forest ecosystem
| Project/Area Number |
21380093
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Forest science
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| Research Institution | Nagoya University |
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Principal Investigator |
HIJII Naoki 名古屋大学, 生命農学研究科, 教授 (80202274)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIDA Tomohiro 東京農工大学, 農学部, 助教 (60521052)
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| Project Period (FY) |
2009 – 2011
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| Keywords | スギ / カラマツ / 人工林 / 節足動物 / 土壌動物 / クモ群集 / 樹冠層 / 食物連鎖 |
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| Research Abstract |
The colonization patterns of microarthropods were examined in arboreal and soil microhabitats of a Cryptomeria japonica plantation by using litter bags. The variation in leaf-litter mass among litter bags increased markedly with increasing decomposition in the soil, and was smaller in the arboreal environment. Soil microarthropods were suggested to be more affected by successional changes because of faster decomposition of the litter, whereas arboreal microarthropods by seasonal changes because of slower decomposition processes.
Comparative analyses revealed that(1) the species diversity of arboreal spider communities in canopies was influenced by the structural complexity of the foliage ;(2) arboreal spider communities differed more distinctly between the layers of the C. japonica than L. kaempferi canopy, mainly due to the difference in the resource quality(living or dead foliage);(3) the community composition of spiders on the forest floor differed between tree species as well as between the canopy and forest floor in both stands, primarily due to the structural complexity of habitats.
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