Rocha Juliana Monteiro de Almeida, Pinto Míriam Plaza, Boubli Jean Philippe, Grelle Carlos Eduardo Viveiros
Programa de Pós-Graduação em Ecologia e Conservação da Biodiversidade, Universidade Estadual de Santa Cruz, Ilhéus, Brazil.
Departamento de Ecologia, Universidade Federal do Rio Grande do Norte, Natal, Brazil.
PLoS One. 2015 Dec 22;10(12):e0145699. doi: 10.1371/journal.pone.0145699. eCollection 2015.
The factors responsible for the formation of Amazonian primate communities are not well understood. Here we investigated the influence of interspecific competition in the assembly of these communities, specifically whether they follow an assembly rule known as "favored states". According to this rule, interspecific competition influences final species composition, resulting in functional groups that are equally represented in the community. We compiled presence-absence data for primate species at 39 Amazonian sites in Brazil, contrasting two regions with distinct productivity regimes: the eutrophic Juruá River basin and the oligotrophic Negro River basin. We tested two hypotheses: that interspecific competition is a mechanism that influences the structure of Amazonian primate communities, and that competition has had a greater influence on the structure of primate communities in regions with low productivity, where resources are more limited. We used null models to test the statistical significance of the results, and found a non-random pattern compatible with the favored states rule in the two regions. Our findings suggest that interspecific competition is an important force driving primate community assembly regardless of productivity regimes.
导致亚马逊灵长类动物群落形成的因素尚未得到充分理解。在此，我们研究了种间竞争在这些群落组装过程中的影响，具体而言，它们是否遵循一种被称为“偏好状态”的组装规则。根据这一规则，种间竞争会影响最终的物种组成，从而导致在群落中功能群得到平等的体现。我们收集了巴西39个亚马逊地区灵长类物种的存在 - 缺失数据，对比了两个具有不同生产力状况的区域：富营养化的茹鲁阿河流域和贫营养化的内格罗河流域。我们检验了两个假设：种间竞争是影响亚马逊灵长类动物群落结构的一种机制，以及竞争对生产力较低、资源更为有限地区的灵长类动物群落结构影响更大。我们使用零模型来检验结果的统计显著性，并在这两个区域发现了与偏好状态规则相符的非随机模式。我们的研究结果表明，无论生产力状况如何，种间竞争都是驱动灵长类动物群落组装的重要力量。
