Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13704 |
Vulnerability to forest loss through altered postfire recovery dynamics in a warming climate in the Klamath Mountains | |
Tepley, Alan J.1; Thompson, Jonathan R.2; Epstein, Howard E.3; Anderson-Teixeira, Kristina J.1,4 | |
2017-10-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Panama |
英文摘要 | In the context of ongoing climatic warming, certain landscapes could be near a tipping point where relatively small changes to their fire regimes or their postfire forest recovery dynamics could bring about extensive forest loss, with associated effects on biodiversity and carbon-cycle feedbacks to climate change. Such concerns are particularly valid in the Klamath Region of northern California and southwestern Oregon, where severe fire initially converts montane conifer forests to systems dominated by broadleaf trees and shrubs. Conifers eventually overtop the competing vegetation, but until they do, these systems could be perpetuated by a cycle of reburning. To assess the vulnerability of conifer forests to increased fire activity and altered forest recovery dynamics in a warmer, drier climate, we characterized vegetation dynamics following severe fire in nine fire years over the last three decades across the climatic aridity gradient of montane conifer forests. Postfire conifer recruitment was limited to a narrow window, with 89% of recruitment in the first 4 years, and height growth tended to decrease as the lag between the fire year and the recruitment year increased. Growth reductions at longer lags were more pronounced at drier sites, where conifers comprised a smaller portion of live woody biomass. An interaction between seed-source availability and climatic aridity drove substantial variation in the density of regenerating conifers. With increasing climatic water deficit, higher propagule pressure (i.e., smaller patch sizes for high-severity fire) was needed to support a given conifer seedling density, which implies that projected future increases in aridity could limit postfire regeneration across a growing portion of the landscape. Under a more severe prospective warming scenario, by the end of the century more than half of the area currently capable of supporting montane conifer forest could become subject to minimal conifer regeneration in even moderate-sized (10s of ha) high-severity patches. |
英文关键词 | Douglas-fir forest resilience Klamath Mountains postfire recruitment propagule pressure reburn stem analysis tipping point tree regeneration |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000410642100014 |
WOS关键词 | HIGH-SEVERITY FIRE ; CONIFER REGENERATION ; SIERRA-NEVADA ; SISKIYOU MOUNTAINS ; PONDEROSA PINE ; VEGETATION RESPONSE ; UNITED-STATES ; EARTH-SYSTEM ; NEW-ZEALAND ; CALIFORNIA |
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/16987 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Smithsonian Conservat Biol Inst, Front Royal, VA 22630 USA; 2.Harvard Forest, Petersham, MA USA; 3.Univ Virginia, Dept Environm Sci, Clark Hall, Charlottesville, VA 22903 USA; 4.Smithsonian Trop Res Inst, Forest Global Earth Observ, Ctr Trop Forest Sci, Panama City, Panama |
推荐引用方式 GB/T 7714 | Tepley, Alan J.,Thompson, Jonathan R.,Epstein, Howard E.,et al. Vulnerability to forest loss through altered postfire recovery dynamics in a warming climate in the Klamath Mountains[J]. GLOBAL CHANGE BIOLOGY,2017,23(10). |
APA | Tepley, Alan J.,Thompson, Jonathan R.,Epstein, Howard E.,&Anderson-Teixeira, Kristina J..(2017).Vulnerability to forest loss through altered postfire recovery dynamics in a warming climate in the Klamath Mountains.GLOBAL CHANGE BIOLOGY,23(10). |
MLA | Tepley, Alan J.,et al."Vulnerability to forest loss through altered postfire recovery dynamics in a warming climate in the Klamath Mountains".GLOBAL CHANGE BIOLOGY 23.10(2017). |
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