Arid
DOI10.1890/08-2168.1
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
ISSN0012-9658
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
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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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