Earthworms and pH affect communities of nematodes and enchytraeids in forest soil

被引:107
作者
Räty, M
Huhta, V
机构
[1] Finnish Forest Res Inst, Suonenjoki Res Stn, Suonenjoki 77600, Finland
[2] Univ Jyvaskyla, Dept Biol & Environm Sci, Jyvaskyla 40351, Finland
关键词
pH; earthworms; nematodes; enchytraeids; interactions;
D O I
10.1007/s00374-003-0614-5
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
In northern boreal forests the occurrence of endogeic and anecic earthworms is determined by soil pH. Increasing evidence suggests that large detritivorous soil animals such as earthworms can influence the other components of the decomposer community. To study the effects of earthworms and pH on soil nematode and enchytraeid communities, a factorially designed experiment was conducted with Lumbricus rubellus and/or Aporrectodea caliginosa. Earthworms were added to 'mesocosms' containing unlimed (pH 4.8) or limed (pH 6.1) coniferous mor humus with their natural biota of micro-organisms. In the absence of earthworms, nematodes were significantly more abundant in limed than in unlimed humus. Earthworms markedly decreased the numbers of nematodes both in unlimed and limed soils. Earthworm activities eliminated enchytraeids in unlimed soil, but liming improved the survival of some species. It was concluded that liming of soil, either alone or mediated by the earthworm populations, is likely to affect soil nematode and enchytraeid community and mineralisation.
引用
收藏
页码:52 / 58
页数:7
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