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首页> 外文期刊>Estuarine Coastal and Shelf Science >Spatial patterns in meiobenthic assemblages in intermittently open/closed coastal lakes in New South Wales, Australia
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Spatial patterns in meiobenthic assemblages in intermittently open/closed coastal lakes in New South Wales, Australia

机译：澳大利亚新南威尔士州间歇性开/关沿海湖泊中的底栖动物群的空间格局

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摘要

Intermittently closed and open lakes and lagoons (ICOLLs) are important features of the Australian coastline. Local authorities frequently open lakes by bulldozing or dredging the mouths, in an effort to improve water-quality and to reduce the risk of flooding and these interventions provided an opportunity to examine large-scale patterns in meiobenthos in relation to isolation from the sea. Even at a coarse level of taxonomic resolution (phylum, class and order), consistent differences between assemblages of meiobenthos in different reaches of the lakes and between open and closed lakes were revealed. The abundance of meiobenthos generally decreased with increasing distance from the sea. Multivariate analyses showed that nematodes, copepods and turbellarians were characteristic of assemblages near the mouths of lakes while polychaetes and oligochaetes characterised those in more isolated areas. Furthermore, assemblages in the inner reaches of open lakes also differed from those in closed lakes. Isolated localities were less diverse and more spatially variable. Differences in meiobenthos between natural lakes and those that are artificially opened became apparent when open and closed were analysed separately. Lakes that are kept open artificially are similar to naturally open lakes despite other impacts associated with human activities. These results are considered in the context of isolation and the implications of proposed changes in the way mouths are manipulated are discussed.
机译：间歇性关闭和开放的湖泊和泻湖（ICOLL）是澳大利亚海岸线的重要特征。地方当局经常通过推土机或疏s河口来开阔湖泊，以改善水质并减少洪水的风险，这些干预措施提供了一个机会来研究与海底隔离有关的鱼塘底栖动物的大规模分布。甚至在分类学分辨率的粗略水平（门，等级和次序）下，在不同湖泊的湖泊中和在开放的和封闭的湖泊中，甲鱼的组合之间也显示出一致的差异。甲鱼的丰度通常随着离海距离的增加而降低。多变量分析表明，线虫，co足类动物和turbularians是湖口附近集合体的特征，而多毛类和寡毛类动物则是较偏远地区的特征。此外，在开阔的湖泊的内部，集合也与在闭锁的湖泊中的集合不同。偏远地区的多样性较低，空间变化较大。当分别对开和关进行分析时，天然湖泊与人工开阔的湖泊之间的底栖动物的差异变得很明显。尽管与人类活动相关的其他影响，人工开放的湖泊与自然开放的湖泊相似。在隔离的情况下考虑了这些结果，并讨论了对嘴操作方式的建议更改的含义。

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