Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1890/08-2168.1 |
Consumer return chronology alters recovery trajectory of stream ecosystem structure and function following drought | |
Murdock, Justin N.1,2; Gido, Keith B.1; Dodds, Walter K.1; Bertrand, Katie N.3; Whiles, Matt R.4,5 | |
通讯作者 | Murdock, Justin N. |
来源期刊 | ECOLOGY
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ISSN | 0012-9658 |
出版年 | 2010 |
卷号 | 91期号:4页码:1048-1062 |
英文摘要 | Consumers are increasingly being recognized as important drivers of ecological succession, yet it is still hard to predict the nature and direction of consumer effects in nonequilibrium environments. We used stream consumer exclosures and large outdoor mesocosms to study the impact of macroconsumers (i.e., fish and crayfish) on recovery of intermittent prairie streams after drying. In the stream, macroconsumers altered system recovery trajectory by decreasing algal and macroinvertebrate biomass, primary productivity, and benthic nutrient uptake rates. However, macroconsumer influence was transient, and differences between exclosures and controls disappeared after 35 days. Introducing and removing macroconsumers after 28 days resulted mainly in changes to macroinvertebrates. In mesocosms, a dominant consumer (the grazing minnow Phoxinus erythrogaster) reduced macroinvertebrate biomass but had little effect on algal assemblage structure and ecosystem rates during recovery. The weak effect of P. erythrogaster in mesocosms, in contrast to the strong consumer effect in the natural stream, suggests that both timing and diversity of returning consumers are important to their overall influence on stream recovery patterns. Although we found that consumers significantly altered ecosystem structure and function in a system experiencing rapid changes in abiotic and biotic factors following disturbance, consumer effects diminished over time and trajectories converged to similar states with respect to primary producers, in spite of differences in consumer colonization history. Thus, consumer impacts can be substantial in recovering ecosystems and are likely to be dependent on the disturbance regime and diversity of the consumer community. |
英文关键词 | disturbance functional group grazer Konza Prairie Biological Station, Kansas, USA nonequilibrium succession |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000277525300012 |
WOS关键词 | OXYGEN CHANGE TECHNIQUE ; PRAIRIE STREAMS ; COMMUNITY STRUCTURE ; CHLOROPHYLL-A ; DESERT STREAM ; TOP-DOWN ; SUCCESSION ; DIVERSITY ; DISTURBANCE ; PERIPHYTON |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/163923 |
作者单位 | 1.Kansas State Univ, Div Biol, Manhattan, KS 66506 USA; 2.ARS, USDA, Natl Sedimentat Lab, Oxford, MS 38655 USA; 3.S Dakota State Univ, Dept Wildlife & Fisheries Sci, Brookings, SD 57007 USA; 4.So Illinois Univ, Dept Zool, Carbondale, IL 62901 USA; 5.So Illinois Univ, Ctr Ecol, Carbondale, IL 62901 USA |
推荐引用方式 GB/T 7714 | Murdock, Justin N.,Gido, Keith B.,Dodds, Walter K.,et al. Consumer return chronology alters recovery trajectory of stream ecosystem structure and function following drought[J],2010,91(4):1048-1062. |
APA | Murdock, Justin N.,Gido, Keith B.,Dodds, Walter K.,Bertrand, Katie N.,&Whiles, Matt R..(2010).Consumer return chronology alters recovery trajectory of stream ecosystem structure and function following drought.ECOLOGY,91(4),1048-1062. |
MLA | Murdock, Justin N.,et al."Consumer return chronology alters recovery trajectory of stream ecosystem structure and function following drought".ECOLOGY 91.4(2010):1048-1062. |
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