Negative responses of Collembola in a forest soil (Alptal, Switzerland) under experimentally increased N deposition
发表在:Negative responses o 157 2030-2036    于:2009
关键词:

Soil fauna,Indicator,N saturation,Environmental change,Diversity index

简介:

The response of specific groups of organisms, like Collembola to atmospheric nitrogen (N) deposition is still scarcely known. We investigated the Collembola community in a subalpine forest (Alptal, Switzerland) as subjected for 12 years to an experimentally increased N deposition (þ25 on top of ambient 12 kg N ha-1 year-1). In the 0–5 cm soil layer, there was a tendency of total Collembola densities to be lower in N-treated than in control plots. The density of Isotomiella minor, the most abundant species, was significantly reduced by the N addition. A tendency of lower Collembola group richness was observed in N-treated plots. The Density-Group index (dDG) showed a significant reduction of community diversity, but the Shannon–Wiener index (H0) was not significantly affected by the N addition. The Collembola community can be considered as a bioindicator of N inputs exceeding the biological needs, namely, soil N saturation.

中国科学院
  • 版权所有:中国科学院华南植物园
  • 联系电话:020-37252862
  • 传真:020-37252862
  • 信箱:lizhen2011@scbg.ac.cn
  • 地址:广州市天河区兴科路723号
  • 邮编:510650