Spartina alterniflora invasions in the Yangtze River estuary, China: An overview of current status and ecosystem effects
Spartina alterniflora invasions in the Yangtze River estuary, China: An overview of current status and ecosystem effects
复制标题
中国长江口互花米草入侵：现状及生态系统影响概述
DOI：
10.1016/j.ecoleng.2008.05.013
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发表时间：
2009-04-01
影响因子：
3.8
通讯作者：
Chen, Jia-kuan
中科院分区：
文献类型：
--
作者：
Li, Bo;Liao, Chengz-hang;Chen, Jia-kuan
长江口是我国重要的生态区域。然而，原产于北美的互花米草在20世纪90年代通过自然扩散和人类活动引入河口，现已成为河口生态系统的优势种，其入侵给河口带来了多重后果。互花蓟马对海参、芦苇等本地植物具有较强的竞争效应，可能对本地植物产生潜在的排斥作用。互花草的存在对土壤线虫和大型底栖无脊椎动物的总密度影响不大，但显著改变了线虫和大型底栖无脊椎动物群落的营养功能群结构。泥滩向米草草甸的转变对鸻科和鹬科鸟类产生了显著的影响，这可能是由于食物资源的减少和滨鸟栖息地的物理改变。互花草的入侵提高了被入侵生态系统的初级生产力，改变了碳氮循环过程。我们的研究主要集中在互花葡萄入侵对本地生态系统结构的影响；因此，互花草入侵对河口生态系统结构的改变对生态系统功能的影响尚需进一步研究。(C) 2008 Elsevier B.V.版权所有
The Yangtze River estuary is an important ecoregion. However, Spartina alterniflora, native to North America, was introduced to the estuary in the 1990s through both natural dispersal and humans and now it is a dominant species in the estuarine ecosystems, with its invasions leading to multiple consequences to the estuary. S. alterniflora had great competitive effects on native species, including Scirpus mariqueter and Phragmites australis, and could potentially exclude the natives locally. The presence of S. alterniflora had little influence on the total density of soil nematodes and macrobenthonic invertebrates, but significantly altered the structure of trophic functional groups of nematode and macrobenthonic invertebrate communities. The conversion of mudflats to Spartina meadows had significant effects on birds of Charadriidae and Scolopacidae, which might be attributable to the reduction of food resources and the physical alterations of habitats for shorebirds. S. alterniflora invasions increased the primary productivity of the invaded ecosystems, and altered carbon and nitrogen cycling processes. Our studies focused mainly on the effects of S. alterniflora invasions on the structure of native ecosystems; thus further studies are clearly needed to investigate how ecosystem functioning is affected by the modification of the structure of estuarine ecosystems by S. alterniflora invasions. (C) 2008 Elsevier B.V. All rights reserved.