globalchange  > 过去全球变化的重建
DOI: 10.1002/ecs2.2794
WOS记录号: WOS:000477912900006
论文题名:
Snowpack influences spatial and temporal soil nitrogen dynamics in a western US montane forested watershed
作者: Yano, Yuriko1; Qubain, Claire1; Holyman, Zach2; Jencso, Kelsey2; Hu, Jia3
通讯作者: Yano, Yuriko
刊名: ECOSPHERE
ISSN: 2150-8925
出版年: 2019
卷: 10, 期:7
语种: 英语
英文关键词: antecedent snow effect ; conifer forest ; nitrogen availability ; nitrogen cycling ; snowpack decline ; snow-water equivalent
WOS关键词: NET PRIMARY PRODUCTIVITY ; MICROBIAL BIOMASS ; CLIMATE-CHANGE ; SEASONAL DYNAMICS ; GROWING-SEASON ; AVAILABILITY ; SNOWMELT ; MOISTURE ; MINERALIZATION ; TERRESTRIAL
WOS学科分类: Ecology
WOS研究方向: Environmental Sciences & Ecology
英文摘要:

Declines in winter snowpack have increased the severity of summer droughts in western U.S. forests, with the potential to also impact soil available nitrogen (N). To understand how snowpack controls spatiotemporal N availability, we examined seasonal N dynamics across elevation, aspect, and topographic position (hollow vs. slope) in a forested watershed in the northern Rocky Mountains. As expected, peak snow-water equivalent (SWE) was generally greater at higher elevations and on north-facing aspects. However, the effects of topographic position and snowdrift led to variability in snow accumulation at smaller spatial scales. Spatial patterns of the snowpack, in turn, influenced soil moisture and temperature, with greater SWE leading to generally higher soil moisture levels during the summer and smaller temperature fluctuations throughout the year. Wetter conditions in spring or fall generally supported greater inorganic N pools, but at the driest locations (low-elevation slope), pulses of N mineralization in summer may have played important roles in overall N dynamics. More importantly, soil moisture during the summer appeared to be more influenced by antecedent snowpack from the previous year than by current-year summer rain. Subsequently, N mineralization under snowpack may be strongly influenced by soil moisture and temperature conditions from the previous fall, before snowpack accumulation. Together, our results indicate that snowpack strongly influences N dynamics beyond the current growing season in western coniferous forests through mediation of soil moisture and temperature, and suggest that further decline in winter snowpack may affect these forests through constraints in both water and N availability.


Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/141332
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: 1.Montana State Univ, Dept Ecol, 310 Lewis Hall, Bozeman, MT 59717 USA
2.Univ Montana, Dept Forest Management, 32 Campus Dr, Missoula, MT 59812 USA
3.Univ Arizona, Sch Nat Resources & Environm, 1064 East Lowell St, Tucson, AZ 85712 USA

Recommended Citation:
Yano, Yuriko,Qubain, Claire,Holyman, Zach,et al. Snowpack influences spatial and temporal soil nitrogen dynamics in a western US montane forested watershed[J]. ECOSPHERE,2019-01-01,10(7)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Yano, Yuriko]'s Articles
[Qubain, Claire]'s Articles
[Holyman, Zach]'s Articles
百度学术
Similar articles in Baidu Scholar
[Yano, Yuriko]'s Articles
[Qubain, Claire]'s Articles
[Holyman, Zach]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Yano, Yuriko]‘s Articles
[Qubain, Claire]‘s Articles
[Holyman, Zach]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.