干旱区生态环境知识资源中心(Arid): The Hydroecology of an Ephemeral Wetland in the McMurdo Dry Valleys, Antarctica

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DOI	10.1029/2019JG005153
	The Hydroecology of an Ephemeral Wetland in the McMurdo Dry Valleys, Antarctica
	Wlostowski, Adam N.1,2; Schulte, Nicholas O.2,3; Adams, Byron J.4,5; Ball, Becky A.6; Esposito, Rhea M. M.7; Gooseff, Michael N.2,8; Lyons, W. Berry 9,10; Nielsen, Uffe N.11; Virginia, Ross A.12; Wall, Diana H.13,14; Welch, Kathy A.2; Mcknight, Diane M.2,8
通讯作者	Wlostowski, Adam N.
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN	2169-8953
EISSN	2169-8961
出版年	2019
卷号	124 期号:12 页码:3814-3830
英文摘要	The McMurdo Dry Valleys is a polar desert on the coast of East Antarctica where ephemeral wetlands become hydrologically active during warm and sunny summers when subsurface flows are generated from melting snowfields. To understand the structure and function of polar wetland ecosystems, we investigated the hydroecology of one such wetland, the Wormherder Creek wetland, during the warm and sunny summer of 2008 - 2009, when the wetland was hydrologically reactivated. Conservative tracer (LiCl) was injected for a 2-hr period into a stream above the wetland to determine flow path orientations and hydrologic residence times. Tracer results indicated that surface water is rapidly exchanged with wetland groundwater and wetland residence times may exceed two austral summers. Major ion concentrations were uniform in samples from surface water and shallow groundwater throughout the wetland. Microbial mats in the wetland had high autotrophic index values (the ratios of chlorophyll a [Chl-a]/ash-free dry mass), ranging from 9 to 38 mu g Chl-a/mg ash-free dry mass, indicative of actively photosynthesizing mat communities. The diatom communities in the mats were relatively uniform compared to those in mats from regularly flowing McMurdo Dry Valleys streams, with four endemic and one widespread diatom taxa of the genus Luticola accounting for an average of 86% of the community. These results indicate that the hydrologic characteristics of the wetland contribute to uniform geochemical conditions. In turn, uniform geochemical conditions may explain the high autotrophic index values of the microbial mats and relatively low spatial variation of the diatom community.
英文关键词	Antarctica desert hydrology diatom biodiversity hyporheic interactions wetlands
类型	Article
语种	英语
国家	USA ; Australia
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000502502100001
WOS关键词	GLACIAL MELTWATER STREAMS ; TAYLOR VALLEY ; HYPORHEIC EXCHANGE ; TRANSIENT STORAGE ; SOLUTE TRANSPORT ; POLAR DESERT ; DIVERSITY ; FLOW ; CONNECTIVITY ; GEOCHEMISTRY
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
EI主题词	2019-12-14
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/2XILL650/311713
作者单位	1.Lynker Technol, Boulder, CO 80301 USA; 2.Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309 USA; 3.Univ Colorado, Environm Studies Program, Boulder, CO 80309 USA; 4.Brigham Young Univ, Dept Biol, Provo, UT 84602 USA; 5.Brigham Young Univ, Monte L Bean Museum, Provo, UT 84602 USA; 6.Arizona State Univ, Sch Math & Nat Sci, West Campus, Glendale, AZ USA; 7.Cary Inst Ecosyst Studies, Millbrook, NY USA; 8.Univ Colorado, Dept Civil Environm & Architectural Engn, Boulder, CO 80309 USA; 9.Ohio State Univ, Sch Earth Sci, Columbus, OH 43210 USA; 10.Ohio State Univ, Byrd Polar & Climate Res Ctr, Columbus, OH 43210 USA; 11.Western Sydney Univ, Hawkesbury Inst Environm, Penrith, NSW, Australia; 12.Dartmouth Coll, Environm Studies Program, Hanover, NH 03755 USA; 13.Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA; 14.Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523 USA
推荐引用方式 GB/T 7714	Wlostowski, Adam N.,Schulte, Nicholas O.,Adams, Byron J.,et al. The Hydroecology of an Ephemeral Wetland in the McMurdo Dry Valleys, Antarctica[J]. Colorado State University,2019,124(12):3814-3830.
APA	Wlostowski, Adam N..,Schulte, Nicholas O..,Adams, Byron J..,Ball, Becky A..,Esposito, Rhea M. M..,...&Mcknight, Diane M..(2019).The Hydroecology of an Ephemeral Wetland in the McMurdo Dry Valleys, Antarctica.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,124(12),3814-3830.
MLA	Wlostowski, Adam N.,et al."The Hydroecology of an Ephemeral Wetland in the McMurdo Dry Valleys, Antarctica".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 124.12(2019):3814-3830.