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首页> 外文期刊>Estuarine Coastal and Shelf Science >Long-term patterns of net phytoplankton and hydrography in coastal SE Arabian Sea: What can be inferred from genus level data?
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Long-term patterns of net phytoplankton and hydrography in coastal SE Arabian Sea: What can be inferred from genus level data?

机译：东南阿拉伯海沿海地区的净浮游植物和水文学长期格局：从属水平数据可以推断出什么？

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摘要

Based on 21 years of phytoplankton and environmental monitoring data from the surface water of coastal southeast Arabian Sea, we demonstrate a shift in phytoplankton community towards higher sample genus richness and diatom abundance during the two decades of observations. Analyses were based on 587 water samples collected between 1990 and 2010 and additionally revealed marked long-term changes in sea surface temperature (SST), sea surface salinity (SSS) and turbidity (Secchi depth). The abundances of dinoflagellate genera were positively correlated to SST, particularly during and after the 1997-1998 El Nino Southern Oscillation event. Several diatom genera increased in abundances with decreasing turbidity around and after 1995-2000, mainly the large celled genera Coscinodiscus spp, Odontella spp and Ditylum spp. In 1996-2000, sample genus richness increased from mean of 8-14, and decreased to 11 thereafter. The increase in sample genus richness was linked to the more frequent presence of most taxa during 1996-2000. Increasing Secchi depth and abundance of frequently encountered large-celled diatoms concurrent with decreasing abundances of Trichodesmium spp might signal the alleviation of the nitrogen limitation in the region, favouring diatoms. (C) 2015 Elsevier Ltd. All rights reserved.
机译：基于21年的浮游植物和来自阿拉伯东南沿海沿海地表水的环境监测数据，我们证明了在过去的20年观察中，浮游植物群落向更高的样品属丰富度和硅藻丰度转变。分析是基于1990年至2010年收集的587个水样本进行的，此外还揭示了海表温度（SST），海表盐度（SSS）和浊度（Secchi深度）的长期长期变化。鞭毛藻属的丰富度与SST呈正相关，特别是在1997-1998年厄尔尼诺南方涛动事件期间和之后。在1995-2000年前后，一些硅藻属的丰度增加，混浊度降低，主要是大细胞属Coscinodiscus spp，Odontella spp和Ditylum spp。在1996-2000年间，样本属丰富度从8-14的平均值增加，此后降至11。样品属丰富度的增加与1996-2000年间大多数类群的频繁出现有关。 Secchi深度和频繁遇到的大细胞硅藻的丰度增加，而毛线虫属物种的丰度降低，则可能标志着该地区氮限制的减轻，有利于硅藻。 （C）2015 Elsevier Ltd.保留所有权利。

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