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首页> 外文期刊>Hydrobiologia >Changes in Rotifer Species Composition and Abundance along a Trophic Gradient in Loch Lomond, Scotland, UK
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Changes in Rotifer Species Composition and Abundance along a Trophic Gradient in Loch Lomond, Scotland, UK

机译：英国苏格兰洛蒙德的营养梯度上轮虫种类组成和丰度的变化

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摘要

Loch Lomond is the second largest body of freshwater in Great Britain. It is a long, narrow lake (36.4 km long, 8.8 km wide). The northern basin is fjord-like and surrounded by a mountainous, base-poor, rocky catchment. In contrast, the southern basin is much broader and shallower with a mainly lowland, calcareous, agricultural catchment. This causes a trophic gradient along the length of the loch that runs from the oligotrophic northern basin to the more mesotrophic southern basin. Rotifer samples were collected at monthly intervals between May and October 2002 at three locations along the length of the loch. More than 12 species were found, the commonest of which were Keratella cochlearis (Gosse) and Trichocerca stylata (Gosse). Although the species composition of the rotifer community varied very little among the sites, rotifer abundance increased markedly from north to south, apparently reflecting the trophic gradient along the length of the loch. The results suggest that rotifer abundance may be a more sensitive indicator of trophic state, and changes in trophic state, than species composition.
机译：洛蒙德湖是英国第二大淡水。它是一个狭长的湖泊（长36.4公里，宽8.8公里）。北部盆地像峡湾，周围是群山，贫瘠的岩石集水区。相比之下，南部盆地更宽，更浅，主要是低地，钙质的农业流域。这导致沿湖泊长度的营养梯度，从营养贫乏的北部盆地延伸到营养更富营养的南部盆地。在2002年5月至2002年10月期间，每月沿湖的三个地点收集轮虫样品。发现了超过12种，其中最常见的是小菜蛾（Keratella cochlearis）（Gosse）和毛癣菌（Trichocerca stylata）（Gosse）。尽管轮虫群落的物种组成在各个地点之间变化不大，但轮虫的丰度从北向南显着增加，显然反映了沿湖体长度的营养梯度。结果表明，轮虫的丰富度可能比物种组成更敏感地指示营养状态和营养状态的变化。

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