Winter Distribution of Diatom Assemblages in the East China Sea
Winter Distribution of Diatom Assemblages in the East China Sea
复制标题
DOI：
10.1007/s10872-005-0013-7
复制
发表时间：
2004-12
影响因子：
2.3
通讯作者：
Kuo-Ping Chiang;Yun-Hsuan Chou;Jeng Chang;G. Gong
中科院分区：
文献类型：
--
作者：
Kuo-Ping Chiang;Yun-Hsuan Chou;Jeng Chang;G. Gong
研究了东海冬季硅藻组合与水体类型的空间分布关系。主成分分析鉴定了研究区两种水类型和两种硅藻组合。中国大陆沿海水域温度和盐度较低，但硝酸盐含量较高。其余研究区域的大陆架混合水类型温度和盐度较高，硝酸盐含量较低。硅藻组合分布与水体类型在空间上不一致。黑潮组合有一个大的直立库存，分布在大陆架断裂的表面。这种组合很可能是黑潮地表水与陆架地区营养丰富的水接触的结果，引发了某些硅藻物种的增殖。在整个研究区，无论是沿海水域还是陆架混合水域类型，都持续存在低蓄积量的背景组合。我们的研究结果支持了以往的研究：背景组合是由于冬季水体对流等不良生长条件所致；物种组成没有明显的季节变化。
We examined the spatial distributional relationships between diatom assemblages and water types during the winter in the East China Sea. Principal component analysis was used to identify two water types and two diatom assemblages in the study area. Coastal water types along the mainland China coastline had low temperature and salinity levels, but high nitrate levels. The shelf-mixing water type in the rest of the study area had higher temperatures and salinities and lower levels of nitrate. Diatom assemblage distribution was not spatially consistent with water type. The Kuroshio assemblage had a large standing stock, distributed along the surface of the shelf break. This assemblage is likely the result of Kuroshio surface water coming into contact with nutrient-rich water in the shelf area, triggering proliferation of certain diatom species. A background assemblage with low standing stock level persisted over the entire study area in both coastal water and the shelf-mixing water types. Our results support previous research: the background assemblage is due to poor growth conditions such as the convection of water during winter; there were no significant seasonal variations in the species composition.