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题名: Long-term density dependent effects of the Chinese mitten crab (Eriocheir sinensis (H. Milne Edwards, 1854)) on submersed macrophytes'
作者: Wang, Hai-Jun1; Xu, Chi2; Wang, Hong-Zhu1; Kosten, Sarian3
关键词: Herbivory ; Bioturbation ; Eriocheir sinensis ; Submersed macrophytes ; Transparency ; Density dependent
刊名: AQUATIC BOTANY
发表日期: 2017-05-01
DOI: 10.1016/j.aquabot.2016.02.001
卷: 140, 页:84-91
收录类别: SCI ; ISTP
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Plant Sciences ; Marine & Freshwater Biology
研究领域[WOS]: Plant Sciences ; Marine & Freshwater Biology
英文摘要: The Chinese mitten crab (Eriocheir sinensis (H. Milne Edwards, 1854)), is a highly invasive species and poses a great threat to endemic species and infrastructure in Europe and North America. Although it is partly herbivorous and prefers to live in lakes with abundant submersed macrophytes, little is known about its effect on macrophytes. We used its native range, the mid-lower Yangtze Basin where the species has been cultured intensively for decades, as our study site to test the hypotheses that (1) high crab densities weaken the positive feedback between macrophytes and water transparency, and that (2) the effects of crabs become apparent only on decadal timescales and (3) are density dependent. We used correlative analyses based on 12 years of monitoring and multi-lake comparisons among 20 sub-areas in 4 lakes. High crab densities were found to cause negative effects on submersed macrophytes and transparency, and to weaken the positive relation between macrophytes and transparency. High densities of macrophytes showed resilience to disturbance from crabs. This resilience, however, reduced with continuous presence of high crab densities. Crab densities were strongly positively related with total phosphorus and negatively with transparency and total nitrogen. Phosphorus concentrations and transparency were not related with phytoplankton chlorophyll a, suggesting that crab's bioturbation strongly influences water quality. The apparent resilience of the dense macrophyte stands should however, not delay attempts to eradicate the crab where it is invasive as this becomes more difficult once they have become established. When macrophyte abundance is already low at the time of invasion, immediate loss of macrophytes may occur. (C) 2016 Elsevier B.V. All rights reserved.
关键词[WOS]: CRAYFISH ORCONECTES-RUSTICUS ; CONTINENTAL EUROPE ; AQUATIC VEGETATION ; LAKE-SEDIMENTS ; YANGTZE LAKES ; SHALLOW LAKES ; FOOD-HABITS ; WATER ; HERBIVORY ; IMPACT
语种: 英语
项目资助者: National Natural Science Foundation of China(30900194 ; State Key Laboratory of Freshwater Ecology and Biotechnology(2014FB14 ; Hubei Province(2015BBA225 ; Youth Innovation Association of Chinese Academy of Sciences(2014312) ; NWO-Veni(86312012) ; 41271197) ; 2011FBZ14) ; 2001AA201A05)
WOS记录号: WOS:000405044500013
ISSN号: 0304-3770
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/32863
Appears in Collections:淡水生态学研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan, Peoples R China
2.Nanjing Univ, Sch Life Sci, Nanjing 210093, Jiangsu, Peoples R China
3.Radboud Univ Nijmegen, Inst Water & Wetland Res, Aquat Ecol & Environm Biol, NL-6525 AJ Nijmegen, Netherlands
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