Arid
Limnological characteristics of a high arctic oasis and comparisons across northern Ellesmere Island
Keatley, Bronwyn E.; Douglas, Marianne S. V.; Smol, John P.
通讯作者Keatley, Bronwyn E.
来源期刊ARCTIC
ISSN0004-0843
出版年2007
卷号60期号:3页码:294-308
英文摘要

Rapidly warming temperatures in the Arctic are predicted to markedly alter the limnology of tundra lakes and ponds. These changes include increases in aquatic production, pH, specific conductivity, and nutrient levels. However, baseline limnological data from High Arctic regions are typically restricted to single sampling events or to repeated samplings of a few select sites, which limits our ability to assess the influence of climatic change. We employ two techniques to examine the influence of a warmer climate on High Arctic aquatic ecosystems. First, we compare limnological characteristics in July 2003 of 23 ponds and lakes from an atypically warm High Arctic oasis on Ellesmere Island to those of 32 ponds and lakes located across northern Ellesmere Island, where climatic conditions are much cooler and more typical of High Arctic environments. Second, we resample 13 sites originally analyzed in 1963 to assess the influence that 40 years of rising temperatures (as documented by meteorological records) have had on the limnological characteristics of these freshwater ecosystems. The specific conductivity values, as well as the concentrations of nutrients and related variables (especially dissolved organic carbon, DOC), from the Arctic oasis sites are among the highest yet reported from the Canadian High Arctic, and they are significantly higher than those from the polar desert around northern Ellesmere Island. Comparison of the modern and historical data indicated that most oasis sites currently have higher pH than they did in 1963, which is consistent with the documented warming of temperatures.


英文关键词limnology polar oasis lakes ponds nutrients DOC climate change Lake Hazen Ellesmere Island Canadian high arctic
类型Article
语种英语
国家Canada
收录类别SCI-E
WOS记录号WOS:000250316500008
WOS关键词CHEMICAL LIMNOLOGY ; NORTHWEST-TERRITORIES ; PIGMENT STRUCTURE ; POLAR DESERT ; 38 LAKES ; CANADA ; PONDS ; ARCHIPELAGO ; COMMUNITIES ; NUNAVUT
WOS类目Environmental Sciences ; Geography, Physical
WOS研究方向Environmental Sciences & Ecology ; Physical Geography
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/153513
作者单位(1)Queens Univ, Dept Biol, Paleoecol & Environm Assessment & Res Lab PEARL, Kingston, ON K7L 3N6, Canada;(2)Univ Toronto, Dept Geol, Paleoenvironm Assessment Lab PAL, Toronto, ON M5S 3B1, Canada
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GB/T 7714
Keatley, Bronwyn E.,Douglas, Marianne S. V.,Smol, John P.. Limnological characteristics of a high arctic oasis and comparisons across northern Ellesmere Island[J],2007,60(3):294-308.
APA Keatley, Bronwyn E.,Douglas, Marianne S. V.,&Smol, John P..(2007).Limnological characteristics of a high arctic oasis and comparisons across northern Ellesmere Island.ARCTIC,60(3),294-308.
MLA Keatley, Bronwyn E.,et al."Limnological characteristics of a high arctic oasis and comparisons across northern Ellesmere Island".ARCTIC 60.3(2007):294-308.
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