湖泊沙漠中的人工绿洲。

Artificial oases in a lacustrine desert.

Mason C F

Department of Biology, University of Essex, Wivenhoe Park, CO4 3SQ, Colchester, England.

Oecologia. 1978 Jan;36(1):93-102. doi: 10.1007/BF00344574.

Abstract

Aspects of colonization by freshwater invertebrates on artificial substrata (macrophyte models) placed in the benthos of a eutrophic lake were studied. 2. Colonization was rapid, with equilibrium occuring at about 35 days. The colonization rate curve decreased with time but extinction rate remained constant. 3. Predators formed 22-32% of the fauna at equilibrium. 4. Area and distance accounted for 92% of the variation in species richness; 69% of the variation was due to area alone. 5. The faunal coefficients z were higher than expected and may be due to competitive interactions in simple habitats.

摘要

研究了放置在富营养化湖泊底栖的人工基质（大型植物模型）上淡水无脊椎动物的定殖情况。2. 定殖迅速，约35天达到平衡。定殖率曲线随时间下降，但灭绝率保持不变。3. 在平衡状态下，捕食者占动物群落的22%-32%。4. 面积和距离占物种丰富度变化的92%；其中69%的变化仅归因于面积。5. 动物群落系数z高于预期，这可能是由于简单生境中的竞争相互作用所致。