Effects of Elodea nuttallii on temperate freshwater plants, microalgae and invertebrates: small differences between invaded and uninvaded areas
Effects of Elodea nuttallii on temperate freshwater plants, microalgae and invertebrates: small differences between invaded and uninvaded areas
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DOI：
10.1007/s10530-015-0865-8
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发表时间：
2015-03
影响因子：
2.9
通讯作者：
Ruth Kelly;Chris Harrod;C. Maggs;N. Reid
中科院分区：
文献类型：
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作者：
Ruth Kelly;Chris Harrod;C. Maggs;N. Reid
根据其目前的分布、传播速度和高生物量的潜力，入侵水生植物伊乐藻可能对欧洲淡水生态系统构成相当大的风险。然而，很少有人研究这种物种对当地生物群的影响。本研究采用全生态系统的方法，并探讨了E。nuttallii对选定的理化参数（溶解氧和pH值），藻类，无脊椎动物和大型植物群落。伊乐藻对植物、无脊椎动物和藻类物种的影响虽小但很显著。藻类附着生物丰富度在E. nuttallii比本地水生植物。本文还讨论了与E. nuttallii与类似的本地植物物种不同，但在总生物量或物种丰富度方面没有差异。水生植物物种丰富度和总盖度与植被盖度呈显著正相关。nuttallii。并不是所有的水生植物都对E.低生种伊乐藻和轮藻的覆盖度与E. nuttallii覆盖，而浮根植物与E. nuttallii封面所有观察到的差异，在水生植物群落相对于其他因素，如营养水平，年际变化和网站之间的差异很小。尽管如此，所观察到的E. nuttallii和轮藻是一个关键的关注，由于许多轮藻物种的稀有性和濒危状态。
The invasive aquatic plant species Elodea nuttallii could pose a considerable risk to European freshwater ecosystems based on its current distribution, rate of spread and potential for high biomass. However, little research has been conducted on the impacts of this species on native biota. This study takes an ecosystem-wide approach and examines the impact of E. nuttallii on selected physicochemical parameters (dissolved oxygen and pH), algae, invertebrate and macrophyte communities. Elodea nuttallii had small but significant impacts on plant, invertebrate and algal species. The richness of algal periphyton was lower on E. nuttallii than on native macrophytes. The taxonomic composition of invertebrate communities associated with E. nuttallii differed from that associated with similar native plant species, but did not differ in terms of total biomass or species richness. Macrophyte species richness and total cover were positively correlated with percentage cover of E. nuttallii. Not all macrophyte species responded in the same way to E. nuttallii invasion; cover of the low-growing species, Elodea canadensis and charophytes were negatively correlated with E. nuttallii cover, whilst floating-rooted plants were positively correlated with E. nuttallii cover. All observed differences in the macrophyte community were small relative to other factors such as nutrient levels, inter-annual variation and differences between sites. Despite this, the observed negative association between E. nuttallii and charophytes is a key concern due to the rarity and endangered status of many charophyte species.