DOI: 10.1111/gcb.12196
论文题名: Landscape influences on climate-related lake shrinkage at high latitudes
作者: Roach J.K. ; Griffith B. ; Verbyla D.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 7 起始页码: 2276
结束页码: 2284
语种: 英语
英文关键词: Alaska
; Drainage
; Groundwater
; National Wildlife Refuge
; Permafrost
; Talik
; Terrestrialization
; Thermokarst
; Waterfowl
; Wetlands
Scopus关键词: climate change
; climate effect
; drainage
; environmental change
; groundwater
; lake dynamics
; landscape
; permafrost
; surface water
; thermokarst
; water flow
; waterfowl
; wetland
; altitude
; article
; climate change
; environmental monitoring
; lake
; methodology
; statistical model
; statistics
; United States
; water flow
; Alaska
; Altitude
; Climate Change
; Environmental Monitoring
; Lakes
; Logistic Models
; Water Movements
; Alaska
; United States
; Anatidae
英文摘要: Climate-related declines in lake area have been identified across circumpolar regions and have been characterized by substantial spatial heterogeneity. An improved understanding of the mechanisms underlying lake area trends is necessary to predict where change is most likely to occur and to identify implications for high latitude reservoirs of carbon. Here, using a population of ca. 2300 lakes with statistically significant increasing and decreasing lake area trends spanning longitudinal and latitudinal gradients of ca. 1000 km in Alaska, we present evidence for a mechanism of lake area decline that involves the loss of surface water to groundwater systems. We show that lakes with significant declines in lake area were more likely to be located: (1) in burned areas; (2) on coarser, well-drained soils; and (3) farther from rivers compared to lakes that were increasing. These results indicate that postfire processes such as permafrost degradation, which also results from a warming climate, may promote lake drainage, particularly in coarse-textured soils and farther from rivers where overland flooding is less likely and downslope flow paths and negative hydraulic gradients between surface water and groundwater systems are more common. Movement of surface water to groundwater systems may lead to a deepening of subsurface flow paths and longer hydraulic residence time which has been linked to increased soil respiration and CO2 release to the atmosphere. By quantifying relationships between statewide coarse resolution maps of landscape characteristics and spatially heterogeneous responses of lakes to environmental change, we provide a means to identify at-risk lakes and landscapes and plan for a changing climate. © 2013 Blackwell Publishing Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62414
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Biology and Wildlife, Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK, 99775, United States; U.S. Geological Survey, Alaska Cooperative Fish and Wildlife Research Unit, University of Alaska Fairbanks, Fairbanks, AK, 99775, United States; Department of Forest Sciences, University of Alaska Fairbanks, Fairbanks, AK, 99775, United States
Recommended Citation:
Roach J.K.,Griffith B.,Verbyla D.. Landscape influences on climate-related lake shrinkage at high latitudes[J]. Global Change Biology,2013-01-01,19(7)