Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14046 |
High land-use intensity exacerbates shifts in grassland vegetation composition after severe experimental drought | |
Stampfli, Andreas1,2,3; Bloor, Juliette M. G.4; Fischer, Markus2,3; Zeiter, Michaela1,2,3 | |
2018-05-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:5页码:2021-2034 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; France |
英文摘要 | Climate change projections anticipate increased frequency and intensity of drought stress, but grassland responses to severe droughts and their potential to recover are poorly understood. In many grasslands, high land-use intensity has enhanced productivity and promoted resource-acquisitive species at the expense of resource-conservative ones. Such changes in plant functional composition could affect the resistance to drought and the recovery after drought of grassland ecosystems with consequences for feed productivity resilience and environmental stewardship. In a 12-site precipitation exclusion experiment in upland grassland ecosystems across Switzerland, we imposed severe edaphic drought in plots under rainout shelters and compared them with plots under ambient conditions. We used soil water potentials to scale drought stress across sites. Impacts of precipitation exclusion and drought legacy effects were examined along a gradient of land-use intensity to determine how grasslands resisted to, and recovered after drought. In the year of precipitation exclusion, aboveground net primary productivity (ANPP) in plots under rainout shelters was -15% to -56% lower than in control plots. Drought effects on ANPP increased with drought severity, specified as duration of topsoil water potential psi < -100kPa, irrespective of land-use intensity. In the year after drought, ANPP had completely recovered, but total species diversity had declined by -10%. Perennial species showed elevated mortality, but species richness of annuals showed a small increase due to enhanced recruitment. In general, the more resource-acquisitive grasses increased at the expense of the deeper-rooted forbs after drought, suggesting that community reorganization was driven by competition rather than plant mortality. The negative effects of precipitation exclusion on forbs increased with land-use intensity. Our study suggests a synergistic impact of land-use intensification and climate change on grassland vegetation composition, and implies that biomass recovery after drought may occur at the expense of biodiversity maintenance. |
英文关键词 | "Birch effect" climate change ecosystem resilience legacy effects multisite experiment nitrogen availability plant traits precipitation manipulation seedling recruitment seminatural grassland |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000428879800016 |
WOS关键词 | PRECIPITATION MANIPULATION EXPERIMENTS ; SIMULATED CLIMATE-CHANGE ; PLANT-COMMUNITIES ; EXTREME DROUGHT ; DISTRIBUTED EXPERIMENTS ; SEEDLING EMERGENCE ; SPECIES-DIVERSITY ; GLOBAL CHANGE ; CARBON-CYCLE ; LEAF-AREA |
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/17174 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Bern Univ Appl Sci, Sch Agr Forest & Food Sci, Zollikofen, Switzerland; 2.Univ Bern, Inst Plant Sci, Bern, Switzerland; 3.Univ Bern, Oeschger Ctr Climate Change Res, Bern, Switzerland; 4.INRA, UREP, VetAgro Sup, Clermont Ferrand, France |
推荐引用方式 GB/T 7714 | Stampfli, Andreas,Bloor, Juliette M. G.,Fischer, Markus,et al. High land-use intensity exacerbates shifts in grassland vegetation composition after severe experimental drought[J]. GLOBAL CHANGE BIOLOGY,2018,24(5):2021-2034. |
APA | Stampfli, Andreas,Bloor, Juliette M. G.,Fischer, Markus,&Zeiter, Michaela.(2018).High land-use intensity exacerbates shifts in grassland vegetation composition after severe experimental drought.GLOBAL CHANGE BIOLOGY,24(5),2021-2034. |
MLA | Stampfli, Andreas,et al."High land-use intensity exacerbates shifts in grassland vegetation composition after severe experimental drought".GLOBAL CHANGE BIOLOGY 24.5(2018):2021-2034. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论