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首页> 外文期刊>Polar biology >Decadal change in macrobenthic soft-bottom community structure in a high Arctic fjord (Kongsfjorden, Svalbard)
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Decadal change in macrobenthic soft-bottom community structure in a high Arctic fjord (Kongsfjorden, Svalbard)

机译：北极高峡湾（Kongsfjorden，斯瓦尔巴特群岛）的大型底栖动物软底群落结构的年代际变化

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摘要

Marine benthic macrofauna communities are considered a good indicator of subtle environmental long-term changes in an ecosystem. In 1997/1998 and 2006, soft-bottom fauna of an Arctic glacial fjord Kongsfjorden was extensively sampled and major communities were identified along the fjord axis, which were related to the diminishing influence of glacial activity. Spatial patterns in community structure and species diversity were significantly different in the central basin of Kongsfjorden between periods while there was no change in the inner part of the fjord. In 1997/98, three faunal associations were distinguished with significant differences in species richness and diversity (H') while in 2006 only two faunal associations were identified and there were no differences any more between the two formerly distinct associations in the central fjord. The increased input of Atlantic water due to a stronger West Spitsbergen Current may be the reason for unification of previous clear faunal division. The faunal association in the inner, well separated glacial part of the fjord, characterized by strong glacier influence, was protected from Atlantic water inflow and, hence, the macrobenthic fauna essentially remained unaffected. Reduced abundance of species typical for glacial bays in the central part of the fjord in 2006 may result from the decreasing effect of Blomstrandbreen glacier, strong increase of input of Atlantic water into the fjord and increased temperature :of West Spitsbergen Current. Higher values of POC inrn2006 than in 1998 are likely the effect of increased primary production resulting from warmer water temperatures.
机译：海洋底栖大型动物群落被认为是生态系统中细微的环境长期变化的良好指示。在1997/1998和2006年，对北极冰川峡湾Kongsfjorden的软底动物群进行了广泛采样，并沿峡湾轴线确定了主要群落，这与冰川活动的影响力下降有关。孔斯峡湾中部盆地之间的群落结构和物种多样性的空间格局在不同时期之间存在显着差异，而峡湾内部没有变化。在1997/98年，三个动物区系在物种丰富度和多样性（H'）上有显着差异，而在2006年，只确定了两个动物区系，而在中央峡湾的两个以前不同的区系之间也不再存在差异。西斯匹次卑尔根海流增强导致大西洋水输入增加，可能是先前明确的动物区分开的原因。峡湾内部，分隔良好的冰川部分的动物区系受到强烈的冰川影响，受到保护，免受大西洋水的流入，因此，大型底栖动物区系基本上不受影响。 2006年峡湾中部冰河湾典型物种的减少，可能是由于Blomstrandbreen冰川的影响减少，大西洋水进入峡湾的强烈增加以及西斯匹次卑尔根海流的温度升高所致。 2006年POC值高于1998年，这可能是水温升高导致初级生产增加的结果。

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