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DOI | 10.1007/s00442-019-04476-z |
Effects of extreme rainfall events are independent of plant species richness in an experimental grassland community | |
Padilla, Francisco M.1,2; Mommer, Liesje3; de Caluwe, Hannie1; Smit-Tiekstra, Annemiek E.1; Visser, Eric J. W.1; de Kroon, Hans1 | |
发表日期 | 2019 |
ISSN | 0029-8549 |
EISSN | 1432-1939 |
卷号 | 191期号:1页码:177-190 |
英文摘要 | Global climate models predict more frequent periods of drought stress alternated by heavier, but fewer rainfall events in the future. Biodiversity studies have shown that such changed drought stress may be mitigated by plant species richness. Here, we investigate if grassland communities, differing in species richness, respond differently to climatic extremes within the growing season. In a 3-year outdoor mesocosm experiment, four grassland species in both monoculture and mixture were subjected to a rainfall distribution regime with two levels: periods of severe drought in the summer intermitted by extreme rainfall events versus regular rainfall over time. Both treatments received the same amount of water over the season. Extreme rainfall combined with drought periods resulted in a 15% decrease in aboveground biomass in the second and third year, compared to the regular rainfall regime. Root biomass was also reduced in the extreme rainfall treatment, particularly in the top soil layer (- 40%). All species developed higher water use efficiencies (less negative leaf delta C-13) in extreme rainfall than in regular rainfall. These responses to the rainfall/drought treatment were independent of species richness, although the mixtures were on an average more productive in terms of biomass than the monocultures. Our experimental results suggest that mixtures are similarly able to buffer these within-season rainfall extremes than monocultures, which contrasts with findings in the studies on natural droughts. Our work demonstrates the importance of investigating the interactions between rainfall distribution and drought periods for understanding effects of climate change on plant community performance. |
WOS研究方向 | Environmental Sciences & Ecology |
来源期刊 | OECOLOGIA |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/102228 |
作者单位 | 1.Radboud Univ Nijmegen, Inst Water & Wetland Res, Dept Expt Plant Ecol, POB 9010, NL-6500 GL Nijmegen, Netherlands; 2.Univ Almeria, Dept Agron, La Canada De San Urbano 04120, Almeria, Spain; 3.Wageningen Univ, Plant Ecol & Nat Conservat Grp, POB 47, NL-6700 AA Wageningen, Netherlands |
推荐引用方式 GB/T 7714 | Padilla, Francisco M.,Mommer, Liesje,de Caluwe, Hannie,et al. Effects of extreme rainfall events are independent of plant species richness in an experimental grassland community[J],2019,191(1):177-190. |
APA | Padilla, Francisco M.,Mommer, Liesje,de Caluwe, Hannie,Smit-Tiekstra, Annemiek E.,Visser, Eric J. W.,&de Kroon, Hans.(2019).Effects of extreme rainfall events are independent of plant species richness in an experimental grassland community.OECOLOGIA,191(1),177-190. |
MLA | Padilla, Francisco M.,et al."Effects of extreme rainfall events are independent of plant species richness in an experimental grassland community".OECOLOGIA 191.1(2019):177-190. |
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