Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13493 |
Press-pulse interactions: effects of warming, N deposition, altered winter precipitation, and fire on desert grassland community structure and dynamics | |
Collins, Scott L.1; Ladwig, Laura M.2; Petrie, Matthew D.3; Jones, Sydney K.1; Mulhouse, John M.1; Thibault, James R.1; Pockman, William T.1 | |
2017-03-01 | |
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:3 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Global environmental change is altering temperature, precipitation patterns, resource availability, and disturbance regimes. Theory predicts that ecological presses will interact with pulse events to alter ecosystem structure and function. In 2006, we established a long-term, multifactor global change experiment to determine the interactive effects of nighttime warming, increased atmospheric nitrogen (N) deposition, and increased winter precipitation on plant community structure and aboveground net primary production (ANPP) in a northern Chihuahuan Desert grassland. In 2009, a lightning-caused wildfire burned through the experiment. Here, we report on the interactive effects of these global change drivers on pre- and postfire grassland community structure and ANPP. Our nighttime warming treatment increased winter nighttime air temperatures by an average of 1.1 degrees C and summer nighttime air temperature by 1.5 degrees C. Soil N availability was 2.5 times higher in fertilized compared with control plots. Average soil volumetric water content (VWC) in winter was slightly but significantly higher (13.0% vs. 11.0%) in plots receiving added winter rain relative to controls, and VWC was slightly higher in warmed (14.5%) compared with control (13.5%) plots during the growing season even though surface soil temperatures were significantly higher in warmed plots. Despite these significant treatment effects, ANPP and plant community structure were highly resistant to these global change drivers prior to the fire. Burning reduced the cover of the dominant grasses by more than 75%. Following the fire, forb species richness and biomass increased significantly, particularly in warmed, fertilized plots that received additional winter precipitation. Thus, although unburned grassland showed little initial response to multiple ecological presses, our results demonstrate how a single pulse disturbance can interact with chronic alterations in resource availability to increase ecosystem sensitivity to multiple drivers of global environmental change. |
英文关键词 | aboveground net primary production Bouteloua eriopoda Bouteloua gracilis desert grassland fire nighttime warming nitrogen addition soil moisture species richness |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396829300013 |
WOS关键词 | NORTHERN CHIHUAHUAN DESERT ; NET PRIMARY PRODUCTIVITY ; WESTERN UNITED-STATES ; RAIN-USE EFFICIENCY ; SEMIARID GRASSLAND ; TERRESTRIAL ECOSYSTEMS ; NITROGEN DEPOSITION ; PLANT COMMUNITY ; CLIMATE-CHANGE ; TEMPORAL DYNAMICS |
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/17154 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ New Mexico, Dept Biol, MSC03-2020, Albuquerque, NM 87131 USA; 2.Univ Wisconsin, Dept Zool, 430 Lincoln Dr,545 Birge Hall, Madison, WI 53706 USA; 3.Univ Wyoming, Dept Bot, Laramie, WY 82071 USA |
推荐引用方式 GB/T 7714 | Collins, Scott L.,Ladwig, Laura M.,Petrie, Matthew D.,et al. Press-pulse interactions: effects of warming, N deposition, altered winter precipitation, and fire on desert grassland community structure and dynamics[J]. GLOBAL CHANGE BIOLOGY,2017,23(3). |
APA | Collins, Scott L..,Ladwig, Laura M..,Petrie, Matthew D..,Jones, Sydney K..,Mulhouse, John M..,...&Pockman, William T..(2017).Press-pulse interactions: effects of warming, N deposition, altered winter precipitation, and fire on desert grassland community structure and dynamics.GLOBAL CHANGE BIOLOGY,23(3). |
MLA | Collins, Scott L.,et al."Press-pulse interactions: effects of warming, N deposition, altered winter precipitation, and fire on desert grassland community structure and dynamics".GLOBAL CHANGE BIOLOGY 23.3(2017). |
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