We assessed the diversity of zooplanktonic resting stages through different spatial scales in intermittent ponds along a forest–grassland transition in southern Brazil. We tested how the diversity (richness) of resting stages varied through the following spatial scales: cores ( α ), among sediment cores within a pond ( β 1 ), among ponds ( β 2 ), and between biomes ( β 3 ). We also assessed the diversity for the subsets of ponds within each biome. Sediment samples from 12 ponds were hydrated in the laboratory, and hatchlings were collected after 30-day incubation experiments. The estimated richness of the components β 2 and β 3 was higher than expected and they had the greatest contributions to total richness (47% and 24%, respectively). Within each biome, component β 2 accounted for the greatest fraction of the total diversity, although their relative contributions changed between biomes (forest: 66%; grassland: 58%). The higher contribution of the among-pond spatial scale ( β 2 ) can be accounted to the environmental heterogeneity among sites. The higher contribution of the broadest spatial scales to the total diversity in the forest rather than the grassland biome suggests that vegetation type influences the spatial patterns of diversity of the zooplankton.

中文翻译：

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沿林草过渡的间歇性池塘中休眠浮游动物群落多样性的加法划分

我们通过巴西南部森林 - 草地过渡的间歇性池塘中的不同空间尺度评估了浮游动物休息阶段的多样性。我们测试了静止阶段的多样性（丰富度）如何通过以下空间尺度变化：核心 (α)、池塘内沉积物核心之间 (β1)、池塘之间 (β2) 和生物群落之间 (β3)。我们还评估了每个生物群落内池塘子集的多样性。12 个池塘的沉积物样品在实验室中进行了水化处理，经过 30 天的孵化实验后收集了幼鱼。β 2 和β 3 组分的估计丰富度高于预期，它们对总丰富度的贡献最大（分别为 47% 和 24%）。在每个生物群落中，组分 β 2 占总多样性的最大部分，尽管它们的相对贡献在生物群落之间发生了变化（森林：66%；草原：58%）。池间空间尺度（ β 2 ）的较高贡献可以解释站点之间的环境异质性。最广泛的空间尺度对森林而不是草原生物群落的总体多样性的贡献更高，表明植被类型影响浮游动物多样性的空间格局。