Long-term phytoplankton dynamics in a Mediterranean eutrophic lagoon (Cabras Lagoon, Italy)
Long-term phytoplankton dynamics in a Mediterranean eutrophic lagoon (Cabras Lagoon, Italy)
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DOI：
10.1080/11263504.2012.717545
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发表时间：
2012-01-01
期刊：
影响因子：
2
通讯作者：
Luglie, A.
中科院分区：
文献类型：
--
作者：
Pulina, S.;Padedda, B. M.;Luglie, A.
分析了1999年至2009年卡布拉斯泻湖浮游植物丰度和多样性的时间变化，该泻湖是一个营养丰富的地中海浅泻湖(撒丁岛西海岸)。它是被意大利长期生态研究网络(LTER，意大利)列入《撒丁岛海洋生态系统》的水生生态系统之一。这项工作的目的是评估1999-2009十年期间浮游植物演替的一般特征及其与环境因素的关系，并根据地中海过渡水域的总趋势，确定推动浮游植物变化的主要力量。我们的结果突出了几个重要方面：年最高密度从1999-2002年的夏秋季节转移到随后几年的冬春季节；从1999年到2008年，叶绿素a浓度和细胞大小同时减少；浮游植物组合的结构发生了变化，从1999-2002年的更具分化的纲组成转变为随后的蓝藻优势。此外，对非生物和浮游植物数据的相似性分析表明，所考虑的水文年份之间存在显著差异。皮尔逊的相关性表明，温度、盐度和营养物质是对浮游植物组成和动态影响最大的环境参数。
The temporal variations in phytoplankton abundance and diversity were analysed from 1999 to 2009 in Cabras Lagoon, a shallow eutrophic Mediterranean lagoon (west coast of Sardinia). It is one of the aquatic ecosystems listed in the "Marine Ecosystems of Sardinia'' by the Italian Network of Long-Term Ecological Research (LTER Italy). The objectives of this work were to assess the general features of phytoplankton succession and its dynamics in relation to environmental factors along the decade 1999-2009, and to identify the main forces driving phytoplankton variability in terms of the general trends in Mediterranean transitional waters. Our results highlight several important aspects: a shift in the annual peak density from the summer-autumn season, observed in 1999-2002, to the winter-spring season in subsequent years; simultaneous reductions in chlorophyll a concentrations and cell size from 1999 to 2008; and the modification of the structure of the phytoplankton assemblages, from a more differentiated class composition in 1999-2002 to the subsequent dominance of the Cyanophyceae. Moreover, analysis of similarity on both abiotic and phytoplanktonic data shows significant differences among the hydrological years considered. Pearson's correlations indicate temperature, salinity and nutrients as the environmental parameters that most influenced the phytoplankton composition and dynamics.