Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/ele.13341 |
Rainfall variability maintains grass-forb species coexistence | |
Hallett, Lauren M.1,2; Shoemaker, Lauren G.3; White, Caitlin T.4; Suding, Katharine N.4 | |
2019-07-12 | |
发表期刊 | ECOLOGY LETTERS |
ISSN | 1461-023X |
EISSN | 1461-0248 |
出版年 | 2019 |
卷号 | 22期号:10页码:1658-1667 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Environmental variability can structure species coexistence by enhancing niche partitioning. Modern coexistence theory highlights two fluctuation-dependent temporal coexistence mechanisms -the storage effect and relative nonlinearity - but empirical tests are rare. Here, we experimentally test if environmental fluctuations enhance coexistence in a California annual grassland. We manipulate rainfall timing and relative densities of the grass Avena barbata and forb Erodium botrys, parameterise a demographic model, and partition coexistence mechanisms. Rainfall variability was integral to grass-forb coexistence. Variability enhanced growth rates of both species, and early-season drought was essential for Erodium persistence. While theoretical developments have focused on the storage effect, it was not critical for coexistence. In comparison, relative nonlinearity strongly stabilised coexistence, where Erodium experienced disproportionately high growth under early-season drought due to competitive release from Avena. Our results underscore the importance of environmental variability and suggest that relative nonlinearity is a critical if underappreciated coexistence mechanism. |
英文关键词 | Avena California grasslands Erodium fluctuation-dependent modern coexistence theory rangelands relative nonlinearity resource acquisitive storage effect stress tolerant |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000475141000001 |
WOS关键词 | ANNUAL VEGETATION ; MAINTENANCE ; GERMINATION ; MECHANISMS ; RESPONSES ; NICHE ; FLUCTUATIONS ; REGENERATION ; TRANSITIONS ; ENVIRONMENT |
WOS类目 | Ecology |
WOS研究方向 | 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/184954 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Oregon, Environm Studies Program, Eugene, OR 97403 USA; 2.Univ Oregon, Dept Biol, Eugene, OR 97403 USA; 3.Univ Wyoming, Bot Dept, Laramie, WY 82071 USA; 4.Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Hallett, Lauren M.,Shoemaker, Lauren G.,White, Caitlin T.,et al. Rainfall variability maintains grass-forb species coexistence[J]. ECOLOGY LETTERS,2019,22(10):1658-1667. |
APA | Hallett, Lauren M.,Shoemaker, Lauren G.,White, Caitlin T.,&Suding, Katharine N..(2019).Rainfall variability maintains grass-forb species coexistence.ECOLOGY LETTERS,22(10),1658-1667. |
MLA | Hallett, Lauren M.,et al."Rainfall variability maintains grass-forb species coexistence".ECOLOGY LETTERS 22.10(2019):1658-1667. |
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