DOI: 10.1111/gcb.13260
论文题名: Experimental whole-lake increase of dissolved organic carbon concentration produces unexpected increase in crustacean zooplankton density
作者: Kelly P.T. ; Craig N. ; Solomon C.T. ; Weidel B.C. ; Zwart J.A. ; Jones S.E.
刊名: Global change biology
ISSN: 13652486
出版年: 2016
卷: 22, 期: 8 起始页码: 2766
结束页码: 2775
语种: 英语
英文关键词: cyclopoid copepods
; Daphnia
; dissolved organic carbon
; ecosystem manipulation
; north temperate lakes
; resource stoichiometry
; zooplankton
Scopus关键词: carbon
; concentration (composition)
; crustacean
; dissolved organic carbon
; ecosystem response
; environmental change
; experimental study
; lake water
; net primary production
; Northern Hemisphere
; population density
; temperate environment
; zooplankton
; animal
; Crustacea
; ecosystem
; growth, development and aging
; lake
; metabolism
; zooplankton
; Animals
; Carbon
; Crustacea
; Ecosystem
; Lakes
; Zooplankton
; Copepoda
; Crustacea
; Cyclopoida
; Daphnia
英文摘要: The observed pattern of lake browning, or increased terrestrial dissolved organic carbon (DOC) concentration, across the northern hemisphere has amplified the importance of understanding how consumer productivity varies with DOC concentration. Results from comparative studies suggest these increased DOC concentrations may reduce crustacean zooplankton productivity due to reductions in resource quality and volume of suitable habitat. Although these spatial comparisons provide an expectation for the response of zooplankton productivity as DOC concentration increases, we still have an incomplete understanding of how zooplankton respond to temporal increases in DOC concentration within a single system. As such, we used a whole-lake manipulation, in which DOC concentration was increased from 8 to 11 mg L(-1) in one basin of a manipulated lake, to test the hypothesis that crustacean zooplankton production should subsequently decrease. In contrast to the spatially derived expectation of sharp DOC-mediated decline, we observed a small increase in zooplankton densities in response to our experimental increase in DOC concentration of the treatment basin. This was due to significant increases in gross primary production and resource quality (lower seston carbon-to-phosphorus ratio; C:P). These results demonstrate that temporal changes in lake characteristics due to increased DOC may impact zooplankton in ways that differ from those observed in spatial surveys. We also identified significant interannual variability across our study region, which highlights potential difficulty in detecting temporal responses of organism abundances to gradual environmental change (e.g., browning). © 2016 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61331
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA; Department of Natural Resource Sciences, McGill University, St. Anne de Bellevue, QC H9X 3V9, Canada; U.S. Geological Survey, Great Lakes Science Center, Lake Ontario Biological Station, Oswego, NY 13126, USA
Recommended Citation:
Kelly P.T.,Craig N.,Solomon C.T.,et al. Experimental whole-lake increase of dissolved organic carbon concentration produces unexpected increase in crustacean zooplankton density[J]. Global change biology,2016-01-01,22(8)