| JIN Haiyan,ZHUANG Yanpei,LI Hongliang,CHEN Jianfang,GAO Shengquan,JI Zhongqiang,ZHANG Yang. 2017. Response of phytoplankton community to different water types in the western Arctic Ocean surface water based on pigment analysis in summer 2008. Acta Oceanologica Sinica, 36(8):109－121 |
| Response of phytoplankton community to different water types in the western Arctic Ocean surface water based on pigment analysis in summer 2008 |
| 2008年夏季西北冰洋表层水浮游植物群落结构的色素表征及其对不同水团的响应 |
| Received:October 24, 2016 |
| DOI：10.1007/s13131-017-1033-z |
| Key words:photosynthetic pigments phytoplankton community biological pump organic carbon ice retreat Chukchi Sea and Canada Basin |
| 中文关键词: 光合色素 浮游植物群落 生物泵 有机碳 海冰消退 楚科奇海与加拿大海盆 |
| 基金项目:The National Natural Science Foundation of China under contract Nos 41276198, 41506222 and 41406217; Chinese Polar Environment Comprehensive Investigation and Assessment Programs under contract Nos Chinare-03-04 and Chinare-04-03; Chinese Polar Science Strategy Research Foundation under contract No. 20120104; the Sino-German Joint Project of “Natural variability of Arctic sea ice and its significance for global climate change and organic carbon cycle”; the Foundation from the China Scholarship Council under contract No. 201404180012. |
| Author Name | Affiliation | E-mail | | JIN Haiyan | Laboratory of Marine Ecosystem and Biogeochemistry of SOA, Second Institute of Oceanography, State Oceanic Administration(SOA), Hangzhou 310012, China
State Key Laboratory of Satellite Ocean Environment Dynamics, Hangzhou 310012, China
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven 27568, Germany | jinhaiyan@sio.org.cn | | ZHUANG Yanpei | Laboratory of Marine Ecosystem and Biogeochemistry of SOA, Second Institute of Oceanography, State Oceanic Administration(SOA), Hangzhou 310012, China | | | LI Hongliang | Laboratory of Marine Ecosystem and Biogeochemistry of SOA, Second Institute of Oceanography, State Oceanic Administration(SOA), Hangzhou 310012, China | | | CHEN Jianfang | Laboratory of Marine Ecosystem and Biogeochemistry of SOA, Second Institute of Oceanography, State Oceanic Administration(SOA), Hangzhou 310012, China
State Key Laboratory of Satellite Ocean Environment Dynamics, Hangzhou 310012, China | | | GAO Shengquan | Laboratory of Marine Ecosystem and Biogeochemistry of SOA, Second Institute of Oceanography, State Oceanic Administration(SOA), Hangzhou 310012, China | | | JI Zhongqiang | Laboratory of Marine Ecosystem and Biogeochemistry of SOA, Second Institute of Oceanography, State Oceanic Administration(SOA), Hangzhou 310012, China | | | ZHANG Yang | Laboratory of Marine Ecosystem and Biogeochemistry of SOA, Second Institute of Oceanography, State Oceanic Administration(SOA), Hangzhou 310012, China | |
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| Abstract: |
| Nutrients and photosynthesis pigments were investigated in the western Arctic Ocean during the 3rd Chinese Arctic Research Expedition Cruise in summer 2008. The study area was divided into five provinces using the K-means clustering method based on the physical and chemical characteristics of the sea water, and to discuss the distribution of the phytoplankton community structure in these provinces. CHEMTAX software was performed using HPLC pigments to estimate the contributions of eight algal classes to the total chlorophyll a (TChl a). The results showed that on the Chukchi Shelf, the Pacific Ocean inflow mainly controlled the Chl a biomass and phytoplankton communities by nutrient concentrations. The high nutrient Anadyr Water and Bering Shelf Water (AnW and BSW) controlled region have high Chl a levels and the diatom dominated community structure. In contrast, in the region occupied by low-nutrient like Alaska Coastal Water (ACW), the Chl a biomass was low, with pico-and nano-phytoplankton as dominated species, such as prasinophytes, chrysophytes and cryptophytes. However, over the off-shelf, the ice cover condition which would affect the physical and nutrient concentrations of the water masses, in consequence had a greater impact on the phytoplankton community structure. Diatom dominated in ice cover region and its contribution to Chl a biomass was up to 75%. In the region close to the Mendeleev Abyssal Plain (MAP), controlled by sea-ice melt water with relatively high salinity (MW-HS), higher nutrient and Chl a concentrations were found and the phytoplankton was dominated by pico-and nano-algae, while the diatom abundance reduced to 33%. In the southern Canada Basin, an ice-free basin (IfB) with the lowest nutrient concentrations and most freshened surface water, low Chl a biomass was a consequence of low nutrients. The ice retreating and a prolonged period of open ocean may not be beneficial to the carbon export efficiency due to reducing the Chl a biomass or intriguing smaller size algae growth. |
| 中文摘要: |
| 本文依托2008年夏季中国第三次北极科学考察航次，对西北冰洋海盆区和楚科奇海陆架营养盐及光合色素进行了测定和分析。根据海水理化性质将研究海区分为5个区，并使用CHEMTAX软件（Mackery et al.，1996）讨论了西北冰洋不同海区浮游植物群落组成结构及其与环境因子之间的关系。结果显示在楚科奇海陆架区，太平洋入流显著影响浮游植物生物量和群落结构。高营养盐Anadyr水团以及白令陆架水控制海域，表现出高Chl a且浮游植物以硅藻为主，相反，低营养盐如阿拉斯加沿岸流控制海域，Chl a生物量低且以微型，微微型浮游植物为主。在外陆架海区，海冰覆盖情况影响着水团的物理特征及营养盐浓度水平，相应地显著影响浮游植物群落结构。在海冰覆盖区域，硅藻生物量站到总Chl a生物量的75%以上；在靠近门捷列夫深海平原海区，受相对高盐的冰融水影响（MW-HS），营养盐浓度和Chl a浓度相对海冰覆盖区略高，浮游植物结构中微型、微微型藻类比重增加，硅藻比例则降至33%；南加拿大海盆无冰海区（IfB），表层水盐度最淡，营养盐浓度最低，相应地显示出低Chl a生物量，表明海冰消退，开阔大洋持续时间延长，将导致低生物量及激发更小型浮游植物的生长，并不有利于有机碳向深海的有效输出。 |
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