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首页> 外文期刊>Journal of Plankton Research >Inter-annual variability in abundance and community structure of zooplankton south and north of Iceland in relation to environmentaln conditions in spring 1990–2007
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Inter-annual variability in abundance and community structure of zooplankton south and north of Iceland in relation to environmentaln conditions in spring 1990–2007

机译：1990-2007年春季冰岛南部和北部浮游动物数量和群落结构的年际变化与环境条件的关系

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An 18 year zooplankton time series from two standard sections differing in hydrographic conditions (Subarctic Water north of Iceland and Atlantic water south of Iceland) was examined in relation to hydrography and phytoplankton dynamics, and large-scale climatic changes in the North Atlantic Ocean, particularly the North Atlantic Oscillation (NAO). The long-term mean zooplankton abundance was higher in south (∼160 000 individuals m−2) than that in north of Iceland (∼120 000 individuals m−2). Abundance fluctuated markedly between years. Copepods (mainly Calanus finmarchicus and Oithona spp.) dominated the zooplankton, comprising >60–70% of the plankton in most years. Among the copepods, C. finmarchicus was more abundant in south of Iceland (∼20–70%) than to the north (∼10–60%). Abundance and community structure were related to environmental variables using regression and multivariate techniques (principal component analysis and redundancy analysis). Temperature and salinity were the most important environmental variables in explaining the differences in species composition in north and south of Iceland, with species and groups like Podon leuckarti and cirripede larvae being relatively abundant to the south, and C. hyperboreus to the north of Iceland. A significant year-to-year variability in community structure was observed both to the south and to the north, with salinity and used nitrate dictating the variability to the south and temperature to the north (Monte Carlo permutation tests, P < 0.05). In neither region was a unidirectional temporal trend in species composition.
机译：考察了水文条件不同的两个标准断面（冰岛北部的亚北极水和冰岛南部的大西洋水）的18年浮游动物时间序列，涉及水文学和浮游植物的动力学，以及北大西洋的大规模气候变化，特别是北大西洋涛动（NAO）。南部的长期平均浮游动物丰度（〜160 000个人m -2 ）高于冰岛北部的长期平均浮游动物丰度（〜120000个人m −2 ）。年份之间的丰度明显波动。 pe足类动物（主要是finalachicus Calaus和Oithona spp。）在浮游动物中占主导地位，在大多数年份中浮游动物占浮游生物的> 60-70％。在the足类中，C。finmarchicus在冰岛南部（约20–70％）比北部（约10-60％）更丰富。使用回归和多元技术（主要成分分析和冗余分析），丰度和群落结构与环境变量相关。温度和盐度是解释冰岛北部和南部物种组成差异的最重要的环境变量，其中Podon leuckarti和Cirripede幼虫等物种和种群在南部相对丰富，而C. hyperboreus在冰岛北部相对丰富。南部和北部均观察到群落结构的年度差异，盐度和硝酸盐决定了南部和北部的温度差异（Monte Carlo置换试验，P <0.05）。在这两个区域中，物种组成都没有单向的时间趋势。

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    《Journal of Plankton Research》 |2009年第5期|p.541-551|共11页
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