globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12756
论文题名:
Long-term growth-increment chronologies reveal diverse influences of climate forcing on freshwater and forest biota in the Pacific Northwest
作者: Black B.A.; Dunham J.B.; Blundon B.W.; Brim-Box J.; Tepley A.J.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期:2
起始页码: 594
结束页码: 604
语种: 英语
英文关键词: Dendrochronology ; Freshwater mussels ; River discharge ; Sclerochronology ; Winter climate
Scopus关键词: biota ; climate forcing ; climate variation ; dendrochronology ; mollusc ; river discharge ; tree ring ; winter ; Pacific Northwest ; United States ; fresh water ; animal ; bivalve ; chemistry ; climate ; climate change ; forest ; growth, development and aging ; river ; season ; tree ; United States ; water flow ; Animals ; Bivalvia ; Climate ; Climate Change ; Forests ; Fresh Water ; Idaho ; Oregon ; Rivers ; Seasons ; Trees ; Washington ; Water Movements
英文摘要: Analyses of how organisms are likely to respond to a changing climate have focused largely on the direct effects of warming temperatures, though changes in other variables may also be important, particularly the amount and timing of precipitation. Here, we develop a network of eight growth-increment width chronologies for freshwater mussel species in the Pacific Northwest, United States and integrate them with tree-ring data to evaluate how terrestrial and aquatic indicators respond to hydroclimatic variability, including river discharge and precipitation. Annual discharge averaged across water years (October 1-September 30) was highly synchronous among river systems and imparted a coherent pattern among mussel chronologies. The leading principal component of the five longest mussel chronologies (1982-2003; PC1mussel) accounted for 47% of the dataset variability and negatively correlated with the leading principal component of river discharge (PC1discharge; r = -0.88; P < 0.0001). PC1mussel and PC1discharge were closely linked to regional wintertime precipitation patterns across the Pacific Northwest, the season in which the vast majority of annual precipitation arrives. Mussel growth was also indirectly related to tree radial growth, though the nature of the relationships varied across the landscape. Negative correlations occurred in forests where tree growth tends to be limited by drought while positive correlations occurred in forests where tree growth tends to be limited by deep or lingering snowpack. Overall, this diverse assemblage of chronologies illustrates the importance of winter precipitation to terrestrial and freshwater ecosystems and suggests that a complexity of climate responses must be considered when estimating the biological impacts of climate variability and change. © 2014 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61679
Appears in Collections:影响、适应和脆弱性

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作者单位: Marine Science Institute, University of Texas at Austin, 750 Channel View Drive, Port Aransas, TX, United States; U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, 3200 SW Jefferson Way, Corvallis, OR, United States; Bureau of Land Management, 3106 Pierce Parkway Suite E, Eugene District Springfield, OR, United States; Confederated Tribes of the Umatilla Indian Reservation, Pendleton, OR, United States; Department of Geography, University of Colorado at Boulder, Boulder, CO, United States

Recommended Citation:
Black B.A.,Dunham J.B.,Blundon B.W.,et al. Long-term growth-increment chronologies reveal diverse influences of climate forcing on freshwater and forest biota in the Pacific Northwest[J]. Global Change Biology,2015-01-01,21(2)
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