Arid
DOI10.1073/pnas.0900758106
Biological consequences of earlier snowmelt from desert dust deposition in alpine landscapes
Steltzer, Heidi1; Landry, Chris2; Painter, Thomas H.3; Anderson, Justin4; Ayres, Edward1
通讯作者Steltzer, Heidi
来源期刊PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN0027-8424
出版年2009
卷号106期号:28页码:11629-11634
英文摘要

Dust deposition to mountain snow cover, which has increased since the late 19th century, accelerates the rate of snowmelt by increasing the solar radiation absorbed by the snowpack. Snowmelt occurs earlier, but is decoupled from seasonal warming. Climate warming advances the timing of snowmelt and early season phenological events (e. g., the onset of greening and flowering); however, earlier snowmelt without warmer temperatures may have a different effect on phenology. Here, we report the results of a set of snowmelt manipulations in which radiation-absorbing fabric and the addition and removal of dust from the surface of the snowpack advanced or delayed snowmelt in the alpine tundra. These changes in the timing of snowmelt were superimposed on a system where the timing of snowmelt varies with topography and has been affected by increased dust loading. At the community level, phenology exhibited a threshold response to the timing of snowmelt. Greening and flowering were delayed before seasonal warming, after which there was a linear relationship between the date of snowmelt and the timing of phenological events. Consequently, the effects of earlier snowmelt on phenology differed in relation to topography, which resulted in increasing synchronicity in phenology across the alpine landscape with increasingly earlier snowmelt. The consequences of earlier snowmelt from increased dust deposition differ from climate warming and include delayed phenology, leading to synchronized growth and flowering across the landscape and the opportunity for altered species interactions, landscape-scale gene flow via pollination, and nutrient cycling.


英文关键词climate warming phenology plant life history synchronization threshold
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000267972700038
WOS关键词CLIMATE-CHANGE ; REPRODUCTIVE PHENOLOGY ; GLOBAL-CHANGE ; ECOSYSTEM RESPONSES ; FLOWERING PHENOLOGY ; PLANT DEVELOPMENT ; GRADIENT METHODS ; LONG-TERM ; VEGETATION ; TUNDRA
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
来源机构Colorado State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/162317
作者单位1.Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523 USA;
2.Ctr Snow & Avalanche Studies, Silverton, CO 81433 USA;
3.Univ Utah, Dept Geog, Salt Lake City, UT 84112 USA;
4.Mt Studies Inst, Silverton, CO 81433 USA
推荐引用方式
GB/T 7714
Steltzer, Heidi,Landry, Chris,Painter, Thomas H.,et al. Biological consequences of earlier snowmelt from desert dust deposition in alpine landscapes[J]. Colorado State University,2009,106(28):11629-11634.
APA Steltzer, Heidi,Landry, Chris,Painter, Thomas H.,Anderson, Justin,&Ayres, Edward.(2009).Biological consequences of earlier snowmelt from desert dust deposition in alpine landscapes.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,106(28),11629-11634.
MLA Steltzer, Heidi,et al."Biological consequences of earlier snowmelt from desert dust deposition in alpine landscapes".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 106.28(2009):11629-11634.
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