Zooplankton community patterns in the Chukchi Sea during summer 2004
Zooplankton community patterns in the Chukchi Sea during summer 2004
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DOI：
10.1016/j.dsr2.2009.08.003
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发表时间：
2010-01-01
影响因子：
3
通讯作者：
Pinchuk, Alexei I.
中科院分区：
文献类型：
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作者：
Hopcroft, Russell R.;Kosobokova, Ksenia N.;Pinchuk, Alexei I.
2004年8月，在楚科奇海沿阿拉斯加和俄罗斯之间的沿着三个断面以及沿先驱谷轴线的四个高速断面采集了浮游动物样本。总共有50个全浮游生物物种，沿着与一个突出的组合meroplankton遇到，大多数是太平洋的起源。桡足类是最具多样性的类群，有23种，占大部分站位浮游动物群落总丰度（3500 ind. m（-2））和生物量（42 mg DW m（-3））的大部分（3100 ind.m（-3），30 mg干重m（-3））。平均而言，分生类幼体的数量（2260 ind.m（-3））几乎与全浮游动物一样多。桡足类主要由四种的伪哲水蚤，Oithona similis，和浅海桡足类Acartia longiremis和Centropages abdominalis。较大的身体桡足类，哲水蚤glacialis/marshallae和三个新哲水蚤物种，等于或超过的生物量的伪哲水蚤，其次是来自Metridia pacifica和Eucalanus bunnarus。在整个取样区观察到大量的Oikopleura vanhoeffeni幼虫（256 ind.m-3）和生物量（42 mg DW m-3）。优势捕食者为毛颚类、美丽副箭虫（Parasagitta elegans）（4.8 mg DW m（-3））和刺胞动物多样性组合（类似于1.2 mg DW m（-3））。浮游动物的六个主要组合被确定，每一个都与水团的物理性质密切相关：暖淡水阿拉斯加沿岸流中的广盐种，冷盐水白令海中的白令海陆架和大洋种组合，这两者之间的过渡组，冷盐水白令海冬季水中的浅海白令海组合，以及冷盐水白令海中的北极陆架种的小集群，新鲜的楚科奇水持续的气候变化可能会改变这些群落的边界、渗透范围、大小谱和生产力，从而导致对这一进入北极门户的浮游动物群落进行定期监测。(C)2009爱思唯尔有限公司保留所有权利。
Zooplankton were sampled in the Chukchi Sea along three transects between Alaska and Russia, Plus four high-speed transects across the axis of Herald Valley in August of 2004. A total of 50 holoplanktonic species, along with a prominent assemblage of meroplankton were encountered; most were of Pacific Ocean origin. Copepods represented the most diverse group with 23 species, and contributed the bulk (3100 ind.m(-3), 30 mg dry weight m(-3)) of the total holozooplankton community abundance (3500 ind.m(-2)) and biomass (42 mg DW m(-3)) at most stations. Meroplanktonic larvae were, on average, almost as abundant (2260 ind.m(-3)) as the holozooplankton. Copepods were dominated numerically by four species of Pseudocalanus, Oithona similis, and the neritic copepods Acartia longiremis and Centropages abdominalis. The larger-bodied copepods, Calanus glacialis/marshallae and three Neocalanus species, equalled or exceeded the biomass of Pseudocalanus, followed by contributions from Metridia pacifica and Eucalanus bungii. Considerable abundance (256 ind.m(-3)) and biomass (42 mg DW m(-3)) of the larvacean Oikopleura vanhoeffeni was observed throughout the sampling area. The chaetognath Parasagitta elegans (4.8 mg DW m(-3)) and a diverse assemblage of cnidarians (similar to 1.2 mg DW m(-3)) comprised the dominant predators. Six major assemblages of zooplankton were identified, and each was closely tied to physical properties of water masses: Euryhaline species in the warm fresh Alaska Coastal Current, a Bering Sea assemblage of both shelf and oceanic species in cool salty Bering Sea Water, a transitional group between these two, a neritic Bering Sea assemblage in cold salty Bering Winter Water, and a small cluster of Arctic Shelf species in cold, fresh Resident Chukchi Water. Ongoing climate change may alter the boundaries, extent of penetration, size spectra, and productivities of these communities, thus warranting regular monitoring of the zooplankton communities of this gateway into the Arctic. (C) 2009 Elsevier Ltd. All rights reserved.