Leaf-eating invertebrates as competitors of aquatic hyphomycetes
Leaf-eating invertebrates as competitors of aquatic hyphomycetes
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食叶无脊椎动物是水生丝菌的竞争对手
DOI：
10.1007/bf00398521
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发表时间：
1980
期刊：
影响因子：
2.7
通讯作者：
F. Bärlocher
中科院分区：
文献类型：
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作者：
F. Bärlocher
食叶无脊椎动物选择性地摄取富含真菌细胞的叶区。在2条硬水和2条软水流的3种基质（栎叶、落叶松和云杉针叶）上研究了这一过程对真菌重合和累积物种多样性（物种数量和均匀性）的影响。定殖真菌的累积种数为S=k·Az（A=底物腐烂曲线下面积，k=底物特异性常数，Z=0.47）。较高的取食活性意味着基质的重量损失更快，从而导致真菌的物种丰富度降低。落叶松针叶的早期演替阶段则相反。真菌的均匀性（个体在物种之间的分布）与无脊椎动物的摄食强度呈负相关，这是通过增加的腐烂率来衡量的。食叶无脊椎动物对水生菌丝的总体影响类似于强有力的竞争者抢占基质，否则就会被相对罕见的真菌的晚期连续尾巴所利用。
SummaryLeaf-eating invertebrates selectively ingest leaf areas rich in fungal cells. The effect of this process on coincident and cumulative species diversity (species numbers and evenness) of the fungi was studied on 3 substrates (oak leaves, larch and spruce needles) in 2 hardwater and 2 softwater streams. Cumulative species number of colonizing fungi follows the equation S=k·Az(A=area below decay curve of the substrate, k=substrate-specific constant, Z=0.47). Higher feeding activity means faster weight loss of the substrate which leads to lower species richness of the fungi. The opposite is true for early successional stages on larch needles. Evenness of the fungi (distribution of individuals among species) is negatively correlated with feeding intensity by invertebrates, as measured by increased decay rates. The overall effect of leaf-eating invertebrates on aquatic hyphomycetes resembles that of potent competitors preempting substrate otherwise used by a late successional tail of relatively rare fungi.