Benthic macroinvertebrates' vertical distribution in the Tagus estuary (Portugal): The influence of tidal cycle
Benthic macroinvertebrates' vertical distribution in the Tagus estuary (Portugal): The influence of tidal cycle
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DOI：
10.1016/j.ecss.2009.11.024
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发表时间：
2010-03-01
影响因子：
2.8
通讯作者：
Cabral, Henrique
中科院分区：
文献类型：
--
作者：
Cardoso, Ines;Granadeiro, Jose Pedro;Cabral, Henrique
本文对塔霍河河口最重要的泥滩之一的底栖动物在潮汐周期内的垂直分布格局进行了评价。在四个完整的潮汐周期中，在24小时内每小时收集一次样本，使用专门为研究目的设计的覆盖物，可以轻松有效地分离15个不同的沉积层。一般线性模型的一种特殊情况，即障碍模型，被用于分析数据集。不同的物种在不同的沉积层中有不同的分布和丰度。结果表明，个体倾向于在水柱高度较低的沉积物中深入，这种迁移在大潮期间更为明显。2009爱思唯尔有限公司版权所有。
In this work we evaluated the vertical distribution pattern of benthic infauna during the tidal cycle at one of the most important mudflats of the Tagus estuary. Samples were collected hourly during 24 h periods at four complete tidal cycles, using a corer specifically designed for the study purpose that allowed easy and effective separation of 15 different sediment layers. A particular case of general linear models, the hurdle model, was used to analyse data sets. We found that different species have different distribution and abundance according to sediment layers. Results showed that individuals tend to go deeper into sediment with a lower water column height and that these migrations are more visible during spring tides. (C) 2009 Elsevier Ltd. All rights reserved.