globalchange  > 气候减缓与适应
DOI: 10.1111/ele.12819
Scopus记录号: 2-s2.0-85029584628
论文题名:
Decoupled responses of soil bacteria and their invertebrate consumer to warming, but not freeze–thaw cycles, in the Antarctic Dry Valleys
作者: Knox M.A.; Andriuzzi W.S.; Buelow H.N.; Takacs-Vesbach C.; Adams B.J.; Wall D.H.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2017
卷: 20, 期:10
起始页码: 1242
结束页码: 1249
语种: 英语
英文关键词: Body size distribution ; climate change ; McMurdo Dry Valleys ; Nematode ; Scottnema lindsayae ; soil fauna ; soil microbe ; traits
Scopus关键词: Bacteria (microorganisms) ; Invertebrata ; Scottnema lindsayae ; animal ; Antarctica ; bacterium ; ecosystem ; freezing ; microbiology ; nematode ; soil ; Animals ; Antarctic Regions ; Bacteria ; Ecosystem ; Freezing ; Nematoda ; Soil ; Soil Microbiology
英文摘要: Altered temperature profiles resulting in increased warming and freeze–thaw cycle (FTC) frequency pose great ecological challenges to organisms in alpine and polar ecosystems. We performed a laboratory microcosm experiment to investigate how temperature variability affects soil bacterial cell numbers, and abundance and traits of soil microfauna (the microbivorous nematode Scottnema lindsayae) from McMurdo Dry Valleys, Antarctica. FTCs and constant freezing shifted nematode body size distribution towards large individuals, driven by higher mortality among smaller individuals. FTCs reduced both bacterial and nematode abundance, but bacterial cell numbers also declined under warming, demonstrating decoupled consumer–prey responses. We predict that higher occurrence of FTCs in cold ecosystems will select for large body size within soil microinvertebrates and overall reduce their abundance. In contrast, warm temperatures without FTCs could lead to divergent responses in soil bacteria and their microinvertebrate consumers, potentially affecting energy and nutrient transfer rates in soil food webs of cold ecosystems. © 2017 John Wiley & Sons Ltd/CNRS
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107564
Appears in Collections:气候减缓与适应

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作者单位: Department of Biology, Colorado State University, Fort Collins, CO, United States; Hopkirk Research Institute, IVABS, Massey University, Private Bag 11-222, Palmerston North, New Zealand; Department of Biology, University of New Mexico, Albuquerque, NM, United States; Department of Biology, Evolutionary Ecology Laboratories and Monte L. Bean Museum, Brigham Young University, Provo, UT, United States; School of Global Environmental Sustainability, Colorado State University, Fort Collins, CO, United States

Recommended Citation:
Knox M.A.,Andriuzzi W.S.,Buelow H.N.,et al. Decoupled responses of soil bacteria and their invertebrate consumer to warming, but not freeze–thaw cycles, in the Antarctic Dry Valleys[J]. Ecology Letters,2017-01-01,20(10)
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