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首页> 外文期刊>Estuarine Coastal and Shelf Science >Distributional patterns in an insect community inhabiting a sandy beach of Uruguay
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Distributional patterns in an insect community inhabiting a sandy beach of Uruguay

机译：居住在乌拉圭沙滩上的昆虫群落中的分布格局

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Most studies of sandy beach macrofauna have been restricted to semiterrestrial species and do not include insects when providing species richness and abundance estimates. Particularly, spatio-temporal patterns of community structure of the entomofauna inhabiting these ecosystems have been scarcely documented. This study assessed spatio-temporal distributional patterns of the night active entomofauna on a beach-dune system of Uruguay, including variations in species richness, abundance and diversity, and their relationship with environmental factors. A deconstructive taxonomic analysis was also performed, considering richness and abundance patterns separately for the most abundant insect Orders (Hymenoptera and Coleoptera) to better understand the factors which drive their patterns. We found clear temporal and across-shore patterns in the insect community inhabiting a land ocean interface, which matched spatiotemporal variations in the environment. Abundance and species richness were highest in spring and summer, concurrently with high temperatures and low values of sediment moisture and compaction. Multivariate ordinations showed two well-defined species groups, which separated summer, autumn and spring samples from winter ones. Generalized Linear Models allowed us to describe a clear segregation in space of the most important orders of the insect community, with specific preferences for the terrestrial (Hymenoptera) and beach (Coleoptera) fringes. Hymenoptera preferred the dune zone, characterized by high elevation and low sand moisture and compaction levels, whereas Coleoptera preferred gentle slopes and fine and humid sands of the beach. Our results suggest that beach and dune ecosystems operate as two separate components in regard to their physical and biological features. The high values of species richness and abundance of insects reveal that this group has a more significant ecological role than that originally considered so far in sandy beach ecology. (C) 2015 Elsevier Ltd. All rights reserved.
机译：多数对沙滩大型动物的研究仅限于半陆生物种，在提供物种丰富度和丰度估计值时不包括昆虫。特别是，几乎没有文献报道栖息于这些生态系统的昆虫动物群落结构的时空格局。这项研究评估了乌拉圭海滩-沙丘系统上夜间活动昆虫动物的时空分布格局，包括物种丰富度，丰度和多样性的变化及其与环境因素的关系。还进行了破坏性的分类学分析，分别考虑了最丰富的昆虫纲（膜翅目和鞘翅目）的丰度和丰度模式，以便更好地了解驱动其模式的因素。我们在居住在陆地海洋界面的昆虫群落中发现了清晰的时间和跨岸模式，这与环境的时空变化相匹配。春季和夏季的丰度和物种丰富度最高，同时高温，沉积物水分和压实值较低。多元标准显示了两个明确定义的物种组，它们将夏季，秋季和春季的样品与冬季的样品分开。广义线性模型使我们能够描述昆虫群落中最重要部位的空间明显隔离，并特别偏爱陆地（膜翅目）和海滩（鞘翅目）条纹。膜翅目更喜欢沙丘区，其特征是高海拔和低的沙土湿度和压实度，而鞘翅目则更喜欢平缓的坡度以及海滩的细沙和湿沙。我们的结果表明，就其物理和生物特征而言，海滩和沙丘生态系统是两个独立的组件。物种丰富度和昆虫丰富度的高价值表明，与迄今在沙滩生态系统中最初认为的相比，该物种具有更大的生态作用。 （C）2015 Elsevier Ltd.保留所有权利。

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