POPULATION AGGREGATION FACILITATES COEXISTENCE OF MANY COMPETING CARRION FLY SPECIES
POPULATION AGGREGATION FACILITATES COEXISTENCE OF MANY COMPETING CARRION FLY SPECIES
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DOI：
10.2307/3546224
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发表时间：
1995-03-01
期刊：
影响因子：
3.4
通讯作者：
HANSKI, I
中科院分区：
文献类型：
--
作者：
KOUKI, J;HANSKI, I
通过实验研究了资源细分和种群聚集对腐尸蝇群落中共存种数量的影响。 将小块牛肝（50克）在一个耕地，我们创造了一个均匀的，但不均匀的环境产卵苍蝇。 在幼虫发育过程中，将两片或四片肝脏组合成一个单位，以消除幼虫竞争过程中的资源斑块，这种操作增加了种间聚集，但减少了种内聚集。 新出现的苍蝇的大小，这反映了竞争的水平，不同的饲养时，斑块保留。 这些结果意味着更大的空间变化，在种内竞争的斑块环境。 与对照组相比，将四种资源合并为一个单位，导致新出现的物种数量明显减少，最丰富物种的优势明显增加。 我们的研究结果有力地支持了竞争对手的独立聚集有利于他们的共存，因此区域多样性的概念。
We studied experimentally the effect of resource subdivision and population aggregation on the number of coexisting species in the coexisting species in the community of carrion flies. Placing small pieces of cow liver (50 g) in a cultivated field we created a homogeneous but patchy environment for the ovipositing flies. For the larval development, two or four pieces of liver were combined to a single unit to remove resource patchiness during larval competition.This manipulation increased interspecific aggregation but decreased intraspecific aggregation. The size of the emerging flies, which reflects the level of competition, varied more between rearings when patchiness was retained. These results imply greater spatial variation in intraspecific competition in the more patchy environment. Combining four pieces of resource into a single unit led to a clear reduction in the number of emerging species, and a clear increase in the dominance of the most abundant species, compared with a control group. Our results strongly support the notion that independent aggregation of competitors facilitates their coexistence, and hence regional diversity.