池沼底落葉層における微小動物群集の野外調査法 : 落葉入り容器設置法の検討

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  • A METHOD FOR FIELD SURVEY OF A MICROPHAGOTROPH COMMUNITY IN A LENTIC LITTER LAYER : A LITTER-VESSEL METHOD
  • イケヌマ テイラクヨウソウ ニ オケル ビ ショウドウブツ グンシュウ ノ ヤ

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説明

A new sampling method was presented for studying a microphagotroph community in a lentic litter layer. In this method, plastic vessels containing litter disks of a plant species were placed on the pond bottom and were sampled periodically (a litter-vessel method). The densities of dominant taxa per litter surface area in the vessels were compared with those in adjacent natural litter scooped directly from underwater by using other plastic vessels (a scooping method). The litter-vessel method minimized any sampling error caused by leaf-litter heterogeneity and, during the sampling process, caused by turbulence of aufwuchs on the leaf litter surface. Therefore this method was more suitable than the scooping method to quantitatively study temporal changes in the community, and it seems applicable to study the specific characteristics of spatial distribution and dispersal ability within a habitat.

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