Meiofauna meso-scale variability in two estuarine habitats
Meiofauna meso-scale variability in two estuarine habitats
复制标题
两个河口生境的小型动物中尺度变异
DOI：
10.1016/0272-7714(85)90070-8
复制
发表时间：
1985
期刊：
影响因子：
--
通讯作者：
J. Fleeger
中科院分区：
文献类型：
--
作者：
F. Phillips;J. Fleeger
在两个河口生境，一个潮间带泥滩和一个通常是潮下的小池塘中，测量了13个月的小型动物丰度的时空变化。每个生境每月采样3个地点（每个生境9个重复中心），以量化生境内线虫和桡足类物种的中尺度（m-km）变化。在不同的生境（所有被测试的分类群）之间、不同的生境内（除harpacticoid种和microarthritis littorale外的所有分类群）和不同的月份之间发现了显著的差异。两种生境的变异幅度差异很大。3个泥滩样地中2个样地以沼泽亲缘物种为主，而第3个样地以潮下物种为主。这种生境内异质性与靠近沼泽和/或暴露梯度上的位置有关。虽然在池塘中也发现了显著的中尺度变异，但物种的反应更具有个体性，这表明物理梯度的影响不大。这些数据表明，在规划长期或基线的小型动物调查时，应考虑中尺度变异性，以确保研究能够代表栖息地，并确保随后的生态推断是有效的。
Spatial and temporal variations in meiofauna abundances were measured for 13 months within two estuarine habitats, an intertidal mudflat and a small, usually subtidal pond. Three locales within each habitat were sampled monthly (nine replicate cores per habitat) to quantify nematode and copepod species within-habitat, meso-scale (m-km) variation. Significant levels of variation were found between habitats (all taxa tested), among locales within habitats (all taxa except the harpacticoid speciesMicroarthridion littorale) and among months. The magnitude of variation differed greatly within the two habitats. Species with marsh affinities predominated in two of the three mudflat locales, while the third locale was predominated by subtidal species. This within-habitat heterogeneity was related to the proximity to the marsh and/or to the position on an exposure gradient. Although significant meso-scale variability was also found in the pond, species responses were more individualistic suggesting that physical gradients were not as influential. These data indicate that meso-scale variability should be considered when planning long-term or baseline meiofauna investigations to assure that the study is representative of the habitat and that subsequent ecological inferences are valid.