Interspecific competition affects resource use by three cryptic freshwater species of Hyalella Smith, 1874 (Amphipoda: Hyalellidae)

Interspecific competition affects resource use by three cryptic freshwater species of Hyalella Smith, 1874 (Amphipoda: Hyalellidae)
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种间竞争影响三种隐秘淡水物种 Hyalella Smith 的资源利用,1874 年(片脚类:Hyalellidae)

DOI:
10.1093/jcbiol/ruab019
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发表时间:
2021
影响因子:
1.1
通讯作者:
Cothran, Rickey D
Cothran, Rickey D
中科院分区:
生物学4区
文献类型:
--
作者:
Mercer, Arissa A;Cothran, Rickey D

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使用相同资源的物种对于理解它们的共存提出了一个悖论。对于神秘物种来说尤其如此,因为它们的表型相似。我们研究了竞争如何影响三种神秘物种 HyalellaSmith, 1874(一种淡水片足类动物属)的食物资源利用。我们假设,当单独存在时,竞争性较差的物种会使用高质量的藻类斑块,而竞争性较高的物种会将劣质物种取代到低质量的藻类斑块上。我们比较了当物种单独或与其他物种一起时,不同藻类含量(即质量)的觅食斑块的使用情况。我们的结果表明,在竞争优势物种存在的情况下,竞争劣势物种在低质量斑块上花费了更多的时间,但竞争优势物种的行为与异种特异性无关。这项研究深入了解了种间竞争在塑造资源利用和自然界共存模式中的作用。
Species that use the same resources present a paradox for understanding their coexistence. This is especially true for cryptic species because they are phenotypically similar. We examined how competition affects food-resource use in three cryptic species ofHyalellaSmith, 1874, a freshwater-amphipod genus. We hypothesized that competitively inferior species would use high-quality algae patches when alone and competitively superior species would displace inferior species to low-quality patches. We compared use of foraging patches varying in algal content (i.e., quality) when species were alone or with another species. Our results showed that the competitively inferior species spent more time on the low-quality patch in the presence of the competitively superior species, but the behavior of the competitively superior species was independent of heterospecifics. This study provides insight into the role of interspecific competition in shaping resource use and patterns of coexistence in nature.
淡水片足类物种复合体竞争能力和反捕食适应之间的权衡
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发表时间: 2002
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