Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aab326 |
Uniform shrub growth response to June temperature across the North Slope of Alaska | |
Ackerman, Daniel E.1; Griffin, Daniel2; Hobbie, Sarah E.1; Popham, Kelly2; Jones, Erin2; Finlay, Jacques C.1 | |
2018-04-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2018 |
卷号 | 13期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The expansion of woody shrubs in arctic tundra alters many aspects of high-latitude ecosystems, including carbon cycling and wildlife habitat. Dendroecology, the study of annual growth increments in woody plants, has shown promise in revealing how climate and environmental conditions interact with shrub growth to affect these key ecosystem properties. However, a predictive understanding of how shrub growth response to climate varies across the heterogeneous landscape remains elusive. Here we use individual-based mixed effects modeling to analyze 19 624 annual growth ring measurements in the stems of Salix pulchra (Cham.), a rapidly expanding deciduous shrub. Stem samples were collected at six sites throughout the North Slope of Alaska. Sites spanned four landscapes that varied in time since glaciation and hence in soil properties, such as nutrient availability, that we expected would modulate shrub growth response to climate. Ring growth was remarkably coherent among sites and responded positively to mean June temperature. The strength of this climate response varied slightly among glacial landscapes, but in contrast to expectations, this variability was not systematically correlated with landscape age. Additionally, shrubs at all sites exhibited diminishing marginal growth gains in response to increasing temperatures, indicative of alternative growth limiting mechanisms in particularly warm years, such as temperature-induced moisture limitation. Our results reveal a regionally-coherent and robust shrub growth response to early season growing temperature, with local soil properties contributing only a minor influence on shrub growth. Our conclusions strengthen predictions of changes to wildlife habitat and improve the representation of tundra vegetation dynamics in earth systems models in response to future arctic warming. |
英文关键词 | arctic tundra shrubs climate change dendroecology glacial history |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000428669000001 |
WOS关键词 | ARCTIC ALASKA ; TUNDRA ; CLIMATE ; DEGLACIATION ; ECOSYSTEMS ; EXPANSION ; FOREST ; CARBON ; PLANTS ; WATER |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26125 |
专题 | 气候变化 |
作者单位 | 1.Univ Minnesota, Dept Ecol Evolut & Behav, 140 Gortner Lab,1479 Gortner Ave, St Paul, MN 55108 USA; 2.Univ Minnesota, Dept Geog Environm & Soc, 414 Social Sci Bldg,267 19th Ave S, Minneapolis, MN 55455 USA |
推荐引用方式 GB/T 7714 | Ackerman, Daniel E.,Griffin, Daniel,Hobbie, Sarah E.,et al. Uniform shrub growth response to June temperature across the North Slope of Alaska[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(4). |
APA | Ackerman, Daniel E.,Griffin, Daniel,Hobbie, Sarah E.,Popham, Kelly,Jones, Erin,&Finlay, Jacques C..(2018).Uniform shrub growth response to June temperature across the North Slope of Alaska.ENVIRONMENTAL RESEARCH LETTERS,13(4). |
MLA | Ackerman, Daniel E.,et al."Uniform shrub growth response to June temperature across the North Slope of Alaska".ENVIRONMENTAL RESEARCH LETTERS 13.4(2018). |
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