Regulation of Spatial Changes in Phytoplankton Community by Water Column Stability and Nutrients in the Southern Yellow Sea
Regulation of Spatial Changes in Phytoplankton Community by Water Column Stability and Nutrients in the Southern Yellow Sea
复制标题
南黄海水体稳定性和营养盐对浮游植物群落空间变化的调控
DOI：
10.1029/2018jg004785
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发表时间：
2019-08-01
影响因子：
3.7
通讯作者：
Chen, Quanzhen
中科院分区：
文献类型：
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作者：
Jiang, Zhibing;Chen, Jianfang;Chen, Quanzhen
南黄海水团具有广泛的空间变异性，冷季表现为YS暖流水（YSWCW）和YS沿岸流水，暖季表现为YS底层冷水（YSBCW）和长江冲淡水。这些水文过程导致营养盐，分层和浊度的显着空间变化，这可能会高度调节浮游植物的分布。在这里，我们提供了2011-2012年期间所有季节的浮游植物的高空间分辨率数据集。富营养化的长江冲淡水和YS沿岸流水域中硅藻大量繁殖。值得注意的是，底栖/半栖硅藻，包括Paralia sulcata和Rhaphoneis spp.，在长江口和苏北浅滩附近占主导地位。然而，隐生植物和附着植物占主导地位的贫营养近海地区由YSWCW和YSBCW。浮游植物丰度和叶绿素a显着低于在YSWCW和YSBCW比其他地区，并在各地区之间的社区组成差异显着。春季在近岸海域和夏季在长江口附近海域均观察到水华现象，这些海域具有营养盐丰富、浊度低、水体相对稳定的特点。典范对应分析表明，冷季层结和暖季营养盐是影响浮游植物群落结构的重要变量。变化分区分析证实，浮游植物群落组成的空间变化主要是由营养物质，而不是由物理因素在所有季节，除了冬季。我们的研究结果强调了水柱稳定性和营养盐与水团变化在塑造浮游植物群落的空间变化的重要性。
The southern Yellow Sea (SYS) shows extensive spatial variations in water masses, particularly YS Warm Current Water (YSWCW) and YS Coastal Current Water in cold and YS Bottom Cold Water (YSBCW) and Changjiang Diluted Water in warm seasons. These hydrographic processes result in significant spatial changes in nutrients, stratification, and turbidity, which may highly regulate phytoplankton distribution in the SYS. Here, we provide high spatial resolution data sets of phytoplankton in the SYS in all seasons during 2011–2012. Diatoms thrived in eutrophic Changjiang Diluted Water and YS Coastal Current Water regions. Notably, benthic/meroplanktonic diatoms, including Paralia sulcata and Rhaphoneis spp., were dominant near the Changjiang Estuary and Subei Shoal. However, cryptophytes and haptophytes were dominant in oligotrophic offshore regions controlled by YSWCW and YSBCW. Phytoplankton abundance and chlorophyll a were considerably lower in the YSWCW and YSBCW than in other regions, and the community composition varied significantly among regions. Algal blooms were observed off the SYS coast in spring and near the Changjiang Estuary in summer, which were characterized by abundant nutrients, low turbidity, and a relatively stable water column. Canonical correspondence analysis demonstrated that stratification in cold and nutrients in warm seasons were most important variables correlated with phytoplankton community. Variation partitioning analysis confirmed that spatial changes in phytoplankton community composition were largely structured by nutrients rather than by physical factors in all seasons except winter. Our findings highlight the significance of water column stability and nutrients associated with water mass variation in shaping spatial changes of phytoplankton community in the SYS.