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首页> 外文期刊>Estuarine Coastal and Shelf Science >Effects of cold winters and regime shifts on macrofauna communities in shallow coastal regions
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Effects of cold winters and regime shifts on macrofauna communities in shallow coastal regions

机译：寒冷的冬天和政权转移对浅海沿海地区大型动物群落的影响

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摘要

Several ecosystem components in the North Sea have undergone fundamental changes following climatic change and this paper aims to establish if these changes also have affected macrofauna communities in the southern North Sea. From 1978 to 2005, the macrofauna communities were sampled seasonally in the sublittoral zone off the island of Norderney, one of the East Frisian barrier islands. Abundance, biomass and species numbers of single species or larger taxonomic groups showed differences in long-term variability and eurytherm species dominated in the study area. After the cold winter of 1978/79 until the mid 1980s a higher percentage of arctic-boreal species were found, while after 1988 the percentage of species with a southern distribution in the North Sea increased in connection with a smooth biological regime shift and a positive North Atlantic Oscillation (NAO) index. Interface-feeders dominated the communities, followed by sand lickers and subsurface deposit-feeders. The latter were more abundant after cold winters, probably due to their ability to utilise dead buried faunal organic matter. Multivariate analyses revealed that cold winters affected the community structure more briefly, while a smooth biological regime shift in 1989/1990 and a climate regime shift induced abrupt biological regime shift in 2001/2002 caused longer-term progressive change in the macrofauna community structure. The significant correlation between macrofauna abundance, biomass and species number and the NAO index failed until 2001 due to a change in climate systems over the northern Atlantic hemisphere.
机译：气候变化后，北海的几个生态系统组成部分发生了根本性变化，本文旨在确定这些变化是否也影响了北海南部的大型动物群落。从1978年到2005年，季节性动物在东弗里西亚人隔离岛之一的诺德奈岛附近的沿海沿岸带进行采样。单一物种或较大分类组的丰度，生物量和物种数量显示了长期变异性的差异，并且在该研究区域中以菊科物种为主导。在1978/79年寒冷的冬季之后直到1980年代中期，发现了更高比例的北极-北方物种，​​而在1988年之后，北海南部分布的物种百分比随着生物学机制的平稳转变和积极变化而增加。北大西洋涛动指数（NAO）。界面给料器占主导地位的社区，其次是砂器和地下沉积物给料器。后者在寒冷的冬天后更为丰富，这可能是由于它们能够利用枯死的动物群落有机物。多变量分析显示，寒冷的冬天对群落结构的影响更为短暂，而1989/1990年的平稳生物状态转换和2001/2002年的气候状态变化引起的突然生物状态变化导致大型动物群落结构的长期逐步变化。直到2001年，由于北大西洋半球气候系统的变化，大型动物区系的丰度，生物量和物种数量与NAO指数之间的显着相关性一直失败。

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