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首页> 外文期刊>Hydrobiologia >Ecosystem impacts of the invasive bivalve Limnoperna fortunei (golden mussel) in South America
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Ecosystem impacts of the invasive bivalve Limnoperna fortunei (golden mussel) in South America

机译：南美入侵性双壳类Limnoperna fortunei（金贻贝）对生态系统的影响

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摘要

We summarize current knowledge on the effects of the invasive Asian bivalve Limnoperna fortunei (introduced in South America around 1990) on local biota. Limnoperna modifies nutrient concentrations and decreases concentrations of particulate organic matter in the water column (including phytoplankton and zooplankton), thus enhancing light penetration and stimulating growth of periphyton and macrophytes. Selective grazing and modification of the N:P ratio are responsible for strong enhancements of toxic cyanobacterial blooms. Limnoperna beds significantly enhance the numbers, biomass, and diversity of practically all accompanying invertebrates. The mussel's planktonic larvae represent an important food item for the larvae of 18 fish species, while juveniles and adults are consumed by at least 50 fish species. Limnoperna is the first and only abundant benthic filter-feeding animal in South American continental waters. The fact that it intercepts and retains in the freshwater lotic domain particulate organic matter that would otherwise be swept into the sea must represent an important energetic subsidy, but the ecosystem-wide consequences of this trophic shift have not yet been addressed. Comparison with the impacts of the zebra mussel in Europe and North America suggests important differences.
机译：我们总结了有关侵入性亚洲双壳类Limnoperna fortunei（1990年左右在南美引入）对当地生物群的影响的当前知识。 Limnoperna可改变营养素浓度并降低水柱（包括浮游植物和浮游动物）中颗粒有机物的浓度，从而增强光的穿透力并刺激周生植物和大型植物的生长。选择性放牧和改变N：P比例是有毒蓝藻水华大量增强的原因。 Limnoperna床显着提高了几乎所有无脊椎动物的数量，生物量和多样性。贻贝的浮游幼虫是18种鱼类幼体的重要食物，而幼鱼和成年鱼至少被50种鱼类食用。 Limnoperna是南美大陆水域中第一个也是唯一一个丰富的底栖滤食动物。它截留并保留在淡水域中的颗粒有机物，否则将被吹入海中，这一事实必须是一项重要的能源补贴，但是这种营养转移对整个生态系统的影响尚未得到解决。与斑马贻贝在欧洲和北美的影响进行比较表明存在重要差异。

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