气候变化领域集成服务门户(CCPortal): Decoupled responses of soil bacteria and their invertebrate consumer to warming, but not freeze–thaw cycles, in the Antarctic Dry Valleys

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DOI	10.1111/ele.12819
	Decoupled responses of soil bacteria and their invertebrate consumer to warming, but not freeze–thaw cycles, in the Antarctic Dry Valleys
	Knox M.A.; Andriuzzi W.S.; Buelow H.N.; Takacs-Vesbach C.; Adams B.J.; Wall D.H.
发表日期	2017
ISSN	1461-023X
EISSN	1461-0248
卷号	20 期号:10
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
英文关键词	Body size distribution; climate change; McMurdo Dry Valleys; Nematode; Scottnema lindsayae; soil fauna; soil microbe; traits
学科领域	Bacteria (microorganisms); Invertebrata; Scottnema lindsayae; animal; Antarctica; bacterium; ecosystem; freezing; microbiology; nematode; soil; Animals; Antarctic Regions; Bacteria; Ecosystem; Freezing; Nematoda; Soil; Soil Microbiology
语种	英语
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
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118327
作者单位	Department of Biology, Colorado State University, Fort Collins, CO 80523, United States; Hopkirk Research Institute, IVABS, Massey University, Private Bag 11-222, Palmerston North, 4474, New Zealand; Department of Biology, University of New Mexico, Albuquerque, NM 87131, United States; Department of Biology, Evolutionary Ecology Laboratories and Monte L. Bean Museum, Brigham Young University, Provo, UT 84602, United States; School of Global Environmental Sustainability, Colorado State University, Fort Collins, CO 80523, United States
推荐引用方式 GB/T 7714	Knox M.A.,Andriuzzi W.S.,Buelow H.N.,等. Decoupled responses of soil bacteria and their invertebrate consumer to warming, but not freeze–thaw cycles, in the Antarctic Dry Valleys[J],2017,20(10).
APA	Knox M.A.,Andriuzzi W.S.,Buelow H.N.,Takacs-Vesbach C.,Adams B.J.,&Wall D.H..(2017).Decoupled responses of soil bacteria and their invertebrate consumer to warming, but not freeze–thaw cycles, in the Antarctic Dry Valleys.Ecology Letters,20(10).
MLA	Knox M.A.,et al."Decoupled responses of soil bacteria and their invertebrate consumer to warming, but not freeze–thaw cycles, in the Antarctic Dry Valleys".Ecology Letters 20.10(2017).