Evidence of species interactions within an ectomycorrhizal fungal community

被引:112
作者
Koide, RT [1 ]
Xu, B
Sharda, J
Lekberg, Y
Ostiguy, N
机构
[1] Penn State Univ, Dept Hort, University Pk, PA 16802 USA
[2] Penn State Univ, Integrat Biosci Grad Program Plant Physiol, University Pk, PA 16802 USA
[3] Penn State Univ, Intercoll Grad Program Ecol, University Pk, PA 16802 USA
[4] Penn State Univ, Dept Entomol, University Pk, PA 16802 USA
关键词
antibiosis; Cenococcum geophilum; Clavulina cinerea; community structure; competition; competitive network; ectomycorrhizal fungi; nonrandom distribution;
D O I
10.1111/j.1469-8137.2004.01216.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Ectomycorrhizal fungal communities can be structured by abiotic and biotic factors. Here, we present evidence for community structuring by species interactions. We sampled ectomycorrhizas and forest floor seven times during a 13-month period. The presence of various ectomycorrhizal fungal species was determined for each sample, and species co-occurrence analyses were performed. For both ectomycorrhizas and forest floor samples there was significantly less co-occurrence among species within the community than expected by chance, mostly because of negative associations involving Cenococcum geophilum or Clavulina cinerea. For some species pairs, there was significantly more co-occurrence than expected by chance. Both nitrogen and tannin additions to the forest floor altered some interactions among species. The causes of these nonrandom distributions are currently unknown. Future investigations on competition, antibiosis, parasitism and facilitation among ectomycorrhizal fungal species appear to be warranted.
引用
收藏
页码:305 / 316
页数:12
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