| Lin Gengming,Chen Yanghang,Huang Jiang,Wang Yanguo,Ye Youyin,Yang Qingliang. 2020. Regional disparities of phytoplankton in relation to different water masses in the Northwest Pacific Ocean during the spring and summer of 2017. Acta Oceanologica Sinica, 39(6):107－118 |
| Regional disparities of phytoplankton in relation to different water masses in the Northwest Pacific Ocean during the spring and summer of 2017 |
| 2017年春夏季西北太平洋浮游植物的区域差异及其与不同水团的关系 |
| Received:June 12, 2019 |
| DOI：10.1007/s13131-019-1511-6 |
| Key words:phytoplankton regional disparity species composition spatial distribution Northwest Pacific Ocean |
| 中文关键词: phytoplankton regional disparity species composition spatial distribution Northwest Pacific Ocean |
| 基金项目:The Public Science and Technology Research Funds Projects of Ocean under contract No. 201305027; the project sponsored by the Scientific Research Foundation of Third Institute of Oceanography, SOA under contract No. 2017009. |
| Author Name | Affiliation | E-mail | | Lin Gengming | Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China | | | Chen Yanghang | Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China | | | Huang Jiang | Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China | | | Wang Yanguo | Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China | wangyanguo@tio.org.cn | | Ye Youyin | Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China | | | Yang Qingliang | Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China | |
|
| Hits: 521 |
| Download times: 540 |
| Abstract: |
| The West Pacific Ocean is considered as the provenance center of global marine life and has the highest species diversity of numerous marine taxa. The phytoplankton, as the primary producer at the base of the food chain, effects on climate change, fish resources as well as the entire ecosystem. However, there are few large-scale surveys covering several currents with different hydrographic characteristics. This study aimed to explore the relationships between the spatio-temporal variation in phytoplankton community structure and different water masses. A total of 630 water samples and 90 net samples of phytoplankton were collected at 45 stations in the Northwest Pacific Ocean (21.0°-42.0°N, 118.0°-156.0°E) during spring and summer 2017. A total of 281 phytoplankton taxa (>5 μm) belonging to 61 genera were identified in the study area. The distribution pattern of the phytoplankton community differed significantly both spatially and temporally. The average abundances of phytoplankton in spring and summer were 797.07×102 cells/L and 84.94×102 cells/L, respectively. Whether in spring or summer, the maximum abundance always appeared in the northern transition region affected by the Oyashio Current, where nutrients were abundant and diatoms dominated the phytoplankton community; whereas the phytoplankton abundance was very low in the oligotrophic Kuroshio region, and the proportion of dinoflagellates in total abundance increased significantly. The horizontal distribution of phytoplankton abundance increased from low to high latitudes, which was consistent with the trend of nutrient distributions, but contrary to that of water temperature and salinity. In the northern area affected by the Oyashio Current, the phytoplankton abundance was mainly concentrated in the upper 30 m of water column, while the maximum abundance often occurred at depths of 50-75 m in the south-central area affected by the Kuroshio Current. Pearson correlation and redundancy analysis (RDA) showed that phytoplankton abundance was significant negatively correlated with temperature and salinity, but positively correlated with nutrient concentration. The phytoplankton community structure was mainly determined by nutrient availability, especially the N:P ratio. |
| 中文摘要: |
| 西太平洋区是全球海洋生物种源中心，许多类群的最高物种多样性都出现于该区域。浮游植物作为食物链的初级生产者，影响着气候变化、鱼类资源以及整个生态系统。然而，很少有大规模的调查覆盖了几个具有不同水文特征的洋流。本研究旨在探讨浮游植物群落结构的时空变化与不同水团的关系。2017年春夏季在西北太平洋（21.0°-42.0°N，118.0°-156.0°E）45个测站采集630份水样及90份网采浮游植物样品。共鉴定浮游植物（5μm以上）61属281种。浮游植物群落分布格局在时间和空间上均存在显著差异。春季和夏季浮游植物平均丰度分别为797.07×102cells/L和84.94×102cells/L。不管春季或夏季，最大丰度总是出现在受亲潮影响的营养丰富的北部过度区，且浮游植物群落以硅藻为主；而寡营养的黑潮区浮游植物丰度很低，且甲藻占总丰度的比例显著增加。浮游植物丰度的水平分布由低纬度向高纬度增加，与营养盐分布趋势一致，而与水温和盐度相反。在受亲潮影响的北部地区，浮游植物丰度主要集中在30m水层；而在受黑潮影响的中南部，浮游植物丰度最大值经常出现于50-75m水层。Pearson相关和冗余分析（RDA）表明，浮游植物丰度与温度、盐度呈显著的负相关，与营养盐浓度呈正相关。浮游植物群落结构主要取决于有效的营养盐，尤其是氮磷比。 |
|
HTML
View Full Text
View/Add Comment Download reader |
| Close |
|
|
|
