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首页> 外文期刊>Polar biology >Large-scale patterns in community structure of benthos and fish in the Barents Sea
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Large-scale patterns in community structure of benthos and fish in the Barents Sea

机译：巴伦支海底栖鱼类和鱼类的群落结构的大规模格局

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Biogeographical patterns have an ecological basis, but few empirical studies possess the necessary scale and resolution relevant for investigation. The Barents Sea shelf provides an ideal study area, as it is a transition area between Atlantic and Arctic regions, and is sampled by a comprehensive survey of all major functional groups. We studied spatial variation in species composition of demersal fish and benthos to elucidate how fish and benthos communities co-varied in relation to environmental variables. We applied co-correspondence analysis on presence-absence data of 64 fishes and 302 benthos taxa from 329 bottom trawl hauls taken at the Barents Sea ecosystem survey in August-September 2011. We found highly significant similarities in the spatial pattern of distribution of benthos and fishes, despite their differences in motility and other ecological traits. The first common ordination axis separated boreal species in the south-west (Atlantic temperate water) from Arctic species in the north-east (Arctic cold water, ice-covered in winter). The second common axis separated shallow bank species from species found in deep basins and trenches. Our results show that fish and benthos communities had a similar relationship to the environmental gradients at the scale of hundreds to thousands of kilometres. We further discussed how fish-benthos interactions vary between sub-regions in the Barents Sea based on species traits and a food web topology for the Barents Sea. This study forms a basis for further investigations on links between fish and benthos communities in the Barents Sea.
机译：生物地理格局具有生态基础，但是很少有经验研究拥有与调查有关的必要规模和分辨率。巴伦支海陆架是一个理想的研究区域，因为它是大西洋和北极地区之间的过渡区域，并且通过对所有主要职能群体的全面调查进行了采样。我们研究了深海鱼类和底栖生物物种组成的空间变化，以阐明鱼类和底栖生物群落如何随环境变量而共同变化。我们对2011年8月至9月在巴伦支海生态系统调查中采集的329底拖网拖曳的64条鱼类和302底栖生物分类群的存在与否数据进行了对应分析。鱼类，尽管它们在活力和其他生态特征上存在差异。第一个共同排序轴将西南部的北极物种（大西洋温带水）与东北部的北极物种（北极的冷水，冬天被冰覆盖）分开。第二个共同轴将浅岸物种与深盆地和海沟中的物种分开。我们的结果表明，鱼类和底栖动物群落与数百到数千公里范围内的环境梯度具有相似的关系。我们根据物种特征和巴伦支海的食物网拓扑，进一步讨论了巴伦支海各次区域之间的鱼底相互作用如何变化。该研究为进一步研究巴伦支海鱼类与底栖生物群落之间的联系奠定了基础。

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