globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13306
论文题名:
Benthic algae compensate for phytoplankton losses in large aquatic ecosystems
作者: Brothers S.; Vadeboncoeur Y.; Sibley P.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期:12
起始页码: 3865
结束页码: 3873
语种: 英语
英文关键词: Great Lakes ; oligotrophication ; periphyton ; phytoplankton ; primary production ; structural shift ; trophic status
Scopus关键词: alga ; benthic environment ; periphyton ; phytoplankton ; primary production ; trophic status ; Great Lakes [North America] ; algae ; animal ; biomass ; bivalve ; ecosystem ; lake ; phytoplankton ; United States ; Animals ; Biomass ; Bivalvia ; Ecosystem ; Great Lakes Region ; Lakes ; Phytoplankton
英文摘要: Anthropogenic activities can induce major trophic shifts in aquatic systems, yet we have an incomplete understanding of the implication of such shifts on ecosystem function and on primary production (PP) in particular. In recent decades, phytoplankton biomass and production in the Laurentian Great Lakes have declined in response to reduced nutrient concentrations and invasive mussels. However, the increases in water clarity associated with declines in phytoplankton may have positive effects on benthic PP at the ecosystem scale. Have these lakes experienced oligotrophication (a reduction of algal production), or simply a shift in autotrophic structure with no net decline in PP? Benthic contributions to ecosystem PP are rarely measured in large aquatic systems, but our calculations based on productivity rates from the Great Lakes indicate that a significant proportion (up to one half, in Lake Huron) of their whole-lake production may be benthic. The large declines (5–45%) in phytoplankton production in the Great Lakes from the 1970s to 2000s may be substantially compensated by benthic PP, which increased by up to 190%. Thus, the autotrophic productive capacity of large aquatic ecosystems may be relatively resilient to shifts in trophic status, due to a redirection of production to the near-shore benthic zone, and large lakes may exhibit shifts in autotrophic structure analogous to the regime shifts seen in shallow lakes. © 2016 John Wiley & Sons Ltd
资助项目: We thank S. Malkin, N. Rooney, R. Smith, R. Vogt and two anonymous reviewers for their comments, and G.M. Silsbe for developing the software to facilitate pelagic GPP calculations. This study was funded by Multiple Stressors and Cumulative Effects in the Great Lakes: An NSERC CREATE Program to Develop Innovative Solutions through International Training Partnerships (PKS) and was supported by the National Science Foundation (DEB 08-42253 to YV).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61243
Appears in Collections:影响、适应和脆弱性

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作者单位: School of Environmental Sciences, University of Guelph, Bovey Building, Gordon Street, Guelph, ON, Canada; Department of Biological Sciences, Wright State University, 3640 Colonel Glenn Highway, Dayton, OH, United States

Recommended Citation:
Brothers S.,Vadeboncoeur Y.,Sibley P.. Benthic algae compensate for phytoplankton losses in large aquatic ecosystems[J]. Global Change Biology,2016-01-01,22(12)
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