globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12616
论文题名:
Linking interdecadal changes in British river ecosystems to water quality and climate dynamics
作者: Vaughan I.P.; Ormerod S.J.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期:9
起始页码: 2725
结束页码: 2740
语种: 英语
英文关键词: Flow ; Invertebrates ; Pollution ; Recovery ; Temperature ; Water quality
Scopus关键词: climate variation ; decadal variation ; ecological impact ; environmental factor ; freshwater ecosystem ; macroinvertebrate ; nutrient dynamics ; river pollution ; species richness ; taxonomy ; water quality ; water temperature ; England ; United Kingdom ; Wales ; animal ; animal dispersal ; chemistry ; climate change ; ecosystem ; invertebrate ; physiology ; population dynamics ; river ; species difference ; standards ; temperature ; United Kingdom ; water quality ; Animal Distribution ; Animals ; Climate Change ; Ecosystem ; England ; Invertebrates ; Population Dynamics ; Rivers ; Species Specificity ; Temperature ; Wales ; Water Quality
英文摘要: Macroinvertebrate communities in Western European rivers have changed substantially in recent decades. Understanding the causes is challenging because improvements in water quality have coincided with climatic variations over this period. Using data covering >2300 rivers and 21 years (1991-2011) across England and Wales, we analysed family-level distributions and nationwide trends in prevalence (proportion of sampling locations where an organism was present) to diagnose the causes of ecological change. Our aims were to: (i) reveal the taxa driving assemblage-level trends; (ii) identify the main changes in family-level prevalence and distribution patterns; and (iii) test whether changes were accounted for by improving water quality, increasing temperatures or variations in discharge. While previous analyses revealed increasing richness among British river invertebrates, a partial turnover of taxa is now evident. Two distinct components of temporal trend have comprised: (i) overall increases or decreases in taxon prevalence over 21 years, which correlated with pollution sensitivity and discharge and (ii) short-term variations in prevalence that correlated primarily with temperature and nutrient concentrations. The longer-term changes in prevalence were reflected in expansions or contractions in families' distributions linked to water quality, with little evidence of shifts consistent with increasing temperatures. Although these monitoring data had limitations (e.g., family-level data, few headwaters), they provide no clear evidence of long-term climate effects on invertebrates; the one feature consistent with climate warming - a small northward expansion of the range of many taxa - was accounted for by large improvements in water quality in northern England. Nevertheless, changes linked to discharge and temperature over the shorter-term (<2 years) point to the climatic sensitivity of invertebrate communities. It is therefore likely that any long-term climatic changes since 1990 have been outweighed by the strength and geographical extent of the recovery from poor water quality. © 2014 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62139
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作者单位: Catchment Research Group, Cardiff School of Biosciences, Cardiff University, Cardiff, CF10 3AX, United Kingdom

Recommended Citation:
Vaughan I.P.,Ormerod S.J.. Linking interdecadal changes in British river ecosystems to water quality and climate dynamics[J]. Global Change Biology,2014-01-01,20(9)
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