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首页> 外文期刊>Estuarine Coastal and Shelf Science >Sediment macroinvertebrate community functioning in impacted and newly-created tidal freshwater habitats
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Sediment macroinvertebrate community functioning in impacted and newly-created tidal freshwater habitats

机译：受影响和新建立的潮汐淡水生境中的沉积物大型无脊椎动物群落

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摘要

Although experiencing strong anthropogenic pressures in many estuaries, the ecology of tidal freshwater areas remains largely undocumented. As part of a restoration project in the freshwater zone of the Schelde estuary (Belgium), a new tidal habitat restoration technique (Controlled Reduced Tide system, CRT) was hypothesised to successfully compensate for the impairment of contemporary habitats. The suitability of this newly-created habitat (CRT) and the estuary was investigated over a period of three years for its macroinvertebrate community development. In both the estuary and the CRT, habitats along a flooding gradient were monitored. Differences between the CRT and reference sites in community functioning were explored according to environmental characteristics and organism biological attributes using the RLQ ordination analysis together with the fourth-corner method. Frequently flooded reference sites exhibited environmental characteristics resulting from a hydrological shear stress. In the CRT, after a rapid removal of the terrestrial fauna at low and mid elevations, the low-energy hydrology led to taxonomic and functional enrichment. The RLQ analysis produced significant environmental filtering of biological attributes mainly related to the terrestrial-aquatic transition and to the environmental stressors. This provides an example of life history modification via estuarine ecosystem management.
机译：尽管在许多河口都承受着巨大的人为压力，但潮汐淡水地区的生态状况仍未得到充分记录。作为在Schelde河口（比利时）的淡水区恢复项目的一部分，假设一种新的潮汐生境恢复技术（受控减潮系统，CRT）成功地补偿了当代生境的损害。在三年的时间里，研究了这种新近建立的栖息地（CRT）和河口的适宜性，以了解其大型无脊椎动物社区的发展。在河口和CRT均监测了沿洪水梯度的栖息地。使用RLQ排序分析和第四角方法，根据环境特征和生物生物学属性，探索了CRT和参考位点在社区功能上的差异。经常淹没的参考点表现出水文剪应力引起的环境特征。在CRT中，在低海拔和中海拔迅速清除陆地动物群后，低能水文学导致了分类学和功能的丰富化。 RLQ分析产生了对生物学特性的重要环境过滤，这些生物学特性主要与陆生-水生转变和环境压力有关。这提供了通过河口生态系统管理修改生活史的示例。

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