气候变化领域集成服务门户(CCPortal): McMurdo Dry Valley lake edge 'moats': the ecological intersection between terrestrial and aquatic polar desert habitats

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DOI	10.1017/S0954102024000087
	McMurdo Dry Valley lake edge 'moats': the ecological intersection between terrestrial and aquatic polar desert habitats
	Stone, Michael S.; Devlin, Shawn P.; Hawes, Ian; Welch, Kathleen A.; Gooseff, Michael N.; Takacs-Vesbach, Cristina; Morgan-Kiss, Rachael; Adams, Byron J.; Barrett, J. E.; Priscu, John C.; Doran, Peter T.
发表日期	2024
ISSN	0954-1020
EISSN	1365-2079
英文摘要	Aquatic ecosystems - lakes, ponds and streams - are hotspots of biodiversity in the cold and arid environment of Continental Antarctica. Environmental change is expected to increasingly alter Antarctic aquatic ecosystems and modify the physical characteristics and interactions within the habitats that they support. Here, we describe physical and biological features of the peripheral 'moat' of a closed-basin Antarctic lake. These moats mediate connectivity amongst streams, lake and soils. We highlight the cyclical moat transition from a frozen winter state to an active open-water summer system, through refreeze as winter returns. Summer melting begins at the lakebed, initially creating an ice-constrained lens of liquid water in November, which swiftly progresses upwards, creating open water in December. Conversely, freezing progresses slowly from the water surface downwards, with water at 1 m bottom depth remaining liquid until May. Moats support productive, diverse benthic communities that are taxonomically distinct from those under the adjacent permanent lake ice. We show how ion ratios suggest that summer exchange occurs amongst moats, streams, soils and sub-ice lake water, perhaps facilitated by within-moat density-driven convection. Moats occupy a small but dynamic area of lake habitat, are disproportionately affected by recent lake-level rises and may thus be particularly vulnerable to hydrological change.
英文关键词	connectivity; ecosystem; ice; microbial mats; transition
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography ; Geology
WOS类目	Environmental Sciences ; Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:001205021400001
来源期刊	ANTARCTIC SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/296577
作者单位	Louisiana State University System; Louisiana State University; University of Montana System; University of Montana; University of Waikato; University of Colorado System; University of Colorado Boulder; University of New Mexico; University System of Ohio; Miami University; Brigham Young University; Brigham Young University; Virginia Polytechnic Institute & State University; Montana State University System; Montana State University Bozeman
推荐引用方式 GB/T 7714	Stone, Michael S.,Devlin, Shawn P.,Hawes, Ian,et al. McMurdo Dry Valley lake edge 'moats': the ecological intersection between terrestrial and aquatic polar desert habitats[J],2024.
APA	Stone, Michael S..,Devlin, Shawn P..,Hawes, Ian.,Welch, Kathleen A..,Gooseff, Michael N..,...&Doran, Peter T..(2024).McMurdo Dry Valley lake edge 'moats': the ecological intersection between terrestrial and aquatic polar desert habitats.ANTARCTIC SCIENCE.
MLA	Stone, Michael S.,et al."McMurdo Dry Valley lake edge 'moats': the ecological intersection between terrestrial and aquatic polar desert habitats".ANTARCTIC SCIENCE (2024).