Arid
DOI10.1038/s41559-017-0253-0
Decadal ecosystem response to an anomalous melt season in a polar desert in Antarctica
Gooseff, Michael N.1; Barrett, John E.2; Adams, Byron J.3,4; Doran, Peter T.5; Fountain, Andrew G.6; Lyons, W. Berry7; McKnight, Diane M.1; Priscu, John C.8; Sokol, Eric R.1; Takacs-Vesbach, Cristina9; Vandegehuchte, Martijn L.10,11,12,13; Virginia, Ross A.14; Wall, Diana H.10,11
通讯作者Gooseff, Michael N.
来源期刊NATURE ECOLOGY & EVOLUTION
ISSN2397-334X
出版年2017
卷号1期号:9页码:1334-1338
英文摘要

Amplified climate change in polar regions is significantly altering regional ecosystems, yet there are few long-term records documenting these responses. The McMurdo Dry Valleys (MDV) cold desert ecosystem is the largest ice-free area of Antarctica, comprising soils, glaciers, meltwater streams and permanently ice-covered lakes. Multi-decadal records indicate that the MDV exhibited a distinct ecosystem response to an uncharacteristic austral summer and ensuing climatic shift. A decadal summer cooling phase ended in 2002 with intense glacial melt (’flood year’)-a step-change in water availability triggering distinct changes in the ecosystem. Before 2002, the ecosystem exhibited synchronous behaviour: declining stream flow, decreasing lake levels, thickening lake ice cover, decreasing primary production in lakes and streams, and diminishing soil secondary production. Since 2002, summer air temperatures and solar flux have been relatively consistent, leading to lake level rise, lake ice thinning and elevated stream flow. Biological responses varied; one stream cyanobacterial mat type immediately increased production, but another stream mat type, soil invertebrates and lake primary productivity responded asynchronously a few years after 2002. This ecosystem response to a climatic anomaly demonstrates differential biological community responses to substantial perturbations, and the mediation of biological responses to climate change by changes in physical ecosystem properties.


类型Article
语种英语
国家USA ; Switzerland ; Belgium
收录类别SCI-E
WOS记录号WOS:000417190400024
WOS关键词RECENT CLIMATE-CHANGE ; DRY VALLEY STREAMS ; LIFE-CYCLE ; THRESHOLDS ; MARINE ; ALASKA ; IMPACT ; EVENT ; WATER
WOS类目Ecology ; Evolutionary Biology
WOS研究方向Environmental Sciences & Ecology ; Evolutionary Biology
来源机构Colorado State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/201228
作者单位1.Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309 USA;
2.Virginia Tech, Dept Biol Sci, Blacksburg, VA 24061 USA;
3.Brigham Young Univ, Dept Biol, Provo, UT 84602 USA;
4.Brigham Young Univ, Monte L Bean Museum, Provo, UT 84602 USA;
5.Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA;
6.Portland State Univ, Dept Geol, Portland, OR 97207 USA;
7.Ohio State Univ, Sch Earth Sci, Columbus, OH 43210 USA;
8.Montana State Univ, Dept Land Resources & Environm Sci, Bozeman, MT 59717 USA;
9.Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA;
10.Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA;
11.Colorado State Univ, Sch Global Environm Sustainabil, Ft Collins, CO 80523 USA;
12.Swiss Fed Inst Forest Snow & Landscape Res, Res Unit Community Ecol, CH-8903 Birmensdorf, Switzerland;
13.Univ Ghent, Dept Biol, Terr Ecol Unit, B-9000 Ghent, Belgium;
14.Dartmouth Coll, Environm Studies Program, Hanover, NH 03755 USA
推荐引用方式
GB/T 7714
Gooseff, Michael N.,Barrett, John E.,Adams, Byron J.,et al. Decadal ecosystem response to an anomalous melt season in a polar desert in Antarctica[J]. Colorado State University,2017,1(9):1334-1338.
APA Gooseff, Michael N..,Barrett, John E..,Adams, Byron J..,Doran, Peter T..,Fountain, Andrew G..,...&Wall, Diana H..(2017).Decadal ecosystem response to an anomalous melt season in a polar desert in Antarctica.NATURE ECOLOGY & EVOLUTION,1(9),1334-1338.
MLA Gooseff, Michael N.,et al."Decadal ecosystem response to an anomalous melt season in a polar desert in Antarctica".NATURE ECOLOGY & EVOLUTION 1.9(2017):1334-1338.
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