Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13814 |
Warming drives a front of white spruce establishment near western treeline, Alaska | |
Miller, Amy E.1; Wilson, Tammy L.1,2; Sherriff, Rosemary L.3,4; Walton, James1 | |
2017-12-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Regional warming has led to increased productivity near the boreal forest margin in Alaska. To date, the effects of warming on seedling recruitment have received little attention, in spite of forecasted forest expansion. Here, we used stand structure and environmental data from 95 white spruce (Picea glauca) plots sampled across a longitudinal gradient in southwest Alaska to explore factors influencing spruce establishment and recruitment near western treeline. We used total counts of live seedlings, saplings, and trees, representing five life stages, to evaluate whether geospatial, climate, and measured plot covariates predicted abundance, using current abundance distributions as a surrogate for climate conditions in the past. We used generalized linear models to test the null hypothesis that conditions favorable for recruitment were similar along the environmental gradient represented by longitude, by exploring relationships between per-plot counts of each life stage and the covariates hypothesized to affect abundance. We also examined the relationship between growing degree days (GDD) and seedling establishment over a period of three decades using tree-ring chronologies obtained from cores taken at a subset of our sites (n = 30). Our results indicated that seedling, sapling, and tree abundance were positively correlated with temperature across the study area. The response to longitude was mixed, with earlier life stages (seedlings, saplings) most abundant at the western end of the gradient, and later life stages (trees) most abundant to the east. The differential relationship between longitude and life-stage abundance suggests a moving front of white spruce establishment through time, driven by changes in environmental conditions near the species' western range limit. Likewise, we found a positive relationship between periods of seedling establishment and GDD, suggesting that longer summers and/or greater heat accumulation might enhance establishment, consistent with the positive relationship we found between life-stage abundance and temperature. |
英文关键词 | boreal forest climate Picea glauca range shift recruitment saplings seedlings |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414969000045 |
WOS关键词 | REGENERATION FOLLOWING FIRE ; CLIMATE-CHANGE ; GROWTH-RESPONSES ; YUKON-TERRITORY ; KENAI PENINSULA ; ALPINE TREELINE ; NATIONAL-PARK ; FOREST ; TEMPERATURE ; PATTERNS |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
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/16651 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Natl Pk Serv, Southwest Alaska Network, Inventory & Monitoring Program, Anchorage, AK 99501 USA; 2.South Dakota State Univ, Dept Nat Resource Management, Brookings, SD 57007 USA; 3.Humboldt State Univ, Geog Dept, Arcata, CA 95521 USA; 4.Humboldt State Univ, Forest Watershed & Wildland Sci Grad Program, Arcata, CA 95521 USA |
推荐引用方式 GB/T 7714 | Miller, Amy E.,Wilson, Tammy L.,Sherriff, Rosemary L.,et al. Warming drives a front of white spruce establishment near western treeline, Alaska[J]. GLOBAL CHANGE BIOLOGY,2017,23(12). |
APA | Miller, Amy E.,Wilson, Tammy L.,Sherriff, Rosemary L.,&Walton, James.(2017).Warming drives a front of white spruce establishment near western treeline, Alaska.GLOBAL CHANGE BIOLOGY,23(12). |
MLA | Miller, Amy E.,et al."Warming drives a front of white spruce establishment near western treeline, Alaska".GLOBAL CHANGE BIOLOGY 23.12(2017). |
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