RELATIONSHIPS BETWEEN TESTATE AMEBAS AND FUNGI IN HUMUS MICROCOSMS

被引:21
作者
COUTEAUX, MM
机构
关键词
D O I
10.1016/0038-0717(85)90071-9
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
Male extract was added to soil in order to provoke the natural growth of fungi. The testate community was quantified. The main species, Phryganella acropodia increased in numbers during the first 3 wk then it reached a steady-state. The growth of three other species (Centropyxis aerophila sphagnicola, Plagiopyxis declivis and Tracheleuglyphya acolla) was followed and their densities were 1/10 of those of Phryganella acropodia although their numbers increased towards the end of the experiment when the density of P. acropodia became stable. Features of the growth of the testate amoebae were estimated (rate of growth, production, mortality, number of generations and generation time) to explain the fluctuations of their densities. The numbers of fungal spores and the variation of the biomass of mycelium were measured, and were different to what would have been expected as the biomass of fungi remaned unaltered. The hypothesis of mycophagy by P. acropodia is proposed and supported by the frequency of the presence of this species on mycelium.
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页码:339 / 345
页数:7
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