DOI: 10.1111/gcb.12861
论文题名: Climate warming and agricultural stressors interact to determine stream macroinvertebrate community dynamics
作者: Piggott J.J. ; Townsend C.R. ; Matthaei C.D.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 5 起始页码: 1887
结束页码: 1906
语种: 英语
英文关键词: Antagonism
; Cumulative effect
; Insect emergence
; Invertebrate drift
; Nutrients
; Sediment
; Synergism
; Temperature
Scopus关键词: antagonism
; climate change
; community dynamics
; fluvial deposit
; insect
; macroinvertebrate
; nutrient
; synergism
; warming
; water temperature
; Hexapoda
; Invertebrata
; agricultural chemical
; nitric acid derivative
; phosphate
; water pollutant
; adverse effects
; analysis
; animal
; body size
; climate change
; drug effects
; ecosystem
; invertebrate
; New Zealand
; physiology
; population dynamics
; river
; sediment
; statistical model
; temperature
; water pollutant
; Agrochemicals
; Animals
; Body Size
; Climate Change
; Ecosystem
; Geologic Sediments
; Invertebrates
; Linear Models
; New Zealand
; Nitrates
; Phosphates
; Population Dynamics
; Rivers
; Temperature
; Water Pollutants, Chemical
英文摘要: Global climate change is likely to modify the ecological consequences of currently acting stressors, but potentially important interactions between climate warming and land-use related stressors remain largely unknown. Agriculture affects streams and rivers worldwide, including via nutrient enrichment and increased fine sediment input. We manipulated nutrients (simulating agricultural run-off) and deposited fine sediment (simulating agricultural erosion) (two levels each) and water temperature (eight levels, 0-6°C above ambient) simultaneously in 128 streamside mesocosms to determine the individual and combined effects of the three stressors on macroinvertebrate community dynamics (community composition and body size structure of benthic, drift and insect emergence assemblages). All three stressors had pervasive individual effects, but in combination often produced additive or antagonistic outcomes. Changes in benthic community composition showed a complex interplay among habitat quality (with or without sediment), resource availability (with or without nutrient enrichment) and the behavioural/physiological tendency to drift or emerge as temperature rose. The presence of sediment and raised temperature both resulted in a community of smaller organisms. Deposited fine sediment strongly increased the propensity to drift. Stressor effects were most prominent in the benthic assemblage, frequently reflected by opposite patterns in individuals quitting the benthos (in terms of their propensity to drift or emerge). Of particular importance is that community measures of stream health routinely used around the world (taxon richness, EPT richness and diversity) all showed complex three-way interactions, with either a consistently stronger temperature response or a reversal of its direction when one or both agricultural stressors were also in operation. The negative effects of added fine sediment, which were often stronger at raised temperatures, suggest that streams already impacted by high sediment loads may be further degraded under a warming climate. However, the degree to which this will occur may also depend on in-stream nutrient conditions. © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61908
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Zoology, University of Otago, P.O. Box 56, Dunedin, New Zealand
Recommended Citation:
Piggott J.J.,Townsend C.R.,Matthaei C.D.. Climate warming and agricultural stressors interact to determine stream macroinvertebrate community dynamics[J]. Global Change Biology,2015-01-01,21(5)