Arid
DOI10.1016/j.baae.2017.11.001
Two Mediterranean annuals feature high within-population trait variability and respond differently to a precipitation gradient
Bergholz, Kolja1; May, Felix2,3; Ristow, Michael1; Giladi, Itamar4,5; Ziv, Yaron4; Jeltsch, Florian1,6
通讯作者Bergholz, Kolja
来源期刊BASIC AND APPLIED ECOLOGY
ISSN1439-1791
EISSN1618-0089
出版年2017
卷号25页码:48-58
英文摘要

Intraspecific trait variability plays an important role in species adaptation to climate change. However, it still remains unclear how plants in semi-arid environments respond to increasing aridity. We investigated the intraspecific trait variability of two common Mediterranean annuals (Geropogon hybridus and Crupina crupinastrum) with similar habitat preferences. They were studied along a steep precipitation gradient in Israel similar to the maximum predicted precipitation changes in the eastern Mediterranean basin (i.e. -30% until 2100). We expected a shift from competitive ability to stress tolerance with decreasing precipitation and tested this expectation by measuring key functional traits (canopy and seed release height, specific leaf area, N-and P-leaf content, seed mass). Further, we evaluated generative bet-hedging strategies by different seed traits. Both species showed different responses along the precipitation gradient. C. crupinastrum exhibited only decreased plant height toward saridity, while G. hybridus showed strong trends of generative adaptation to aridity. Different seed trait indices suggest increased bet-hedging of G. hybridus in arid environments. However, no clear trends along the precipitation gradient were observed in leaf traits (specific leaf area and leaf N-/P-content) in both species. Moreover, variance decomposition revealed that most of the observed trait variation (>> 50%) is found within populations. The findings of our study suggest that responses to increased aridity are highly species-specific and local environmental factors may have a stronger effect on intraspecific trait variation than shifts in annual precipitation. We therefore argue that trait-based analyses should focus on precipitation gradients that are comparable to predicted precipitation changes and compare precipitation effects to effects of local environmental factors. (C) 2017 Gesellschaft fur Okologie. Published by Elsevier GmbH. All rights reserved.


英文关键词Climate change Functional ecology Plant height Drought stress Rainfall gradient Trait-environment relationship Local adaptation Phenotypic plasticity
类型Article
语种英语
国家Germany ; Israel
收录类别SCI-E
WOS记录号WOS:000417466900005
WOS关键词CLIMATE-CHANGE ; ANNUAL PLANTS ; MANIPULATION EXPERIMENT ; SEED HETEROMORPHISM ; COMMUNITY RESPONSE ; ECOLOGICAL RANGE ; LOCAL ADAPTATION ; LIFE-HISTORY ; EVOLUTIONARY ; DISPERSAL
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
来源机构Ben-Gurion University of the Negev
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/197760
作者单位1.Univ Potsdam, Inst Biol & Biochem, Dept Plant Ecol & Nat Conservat, Mahlenberg 3, D-14476 Potsdam, Germany;
2.German Ctr Integrat Biodivers Res iDiv, Deutsch Pl 5e, D-04103 Leipzig, Germany;
3.Martin Luther Univ Halle Wittenberg, Inst Comp Sci, D-06099 Halle, Saale, Germany;
4.Ben Gurion Univ Negev, Dept Life Sci, IL-84105 Beer Sheva, Israel;
5.Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, Mitrani Dept Desert Ecol, Sede Boger Campus, IL-84990 Beer Sheva, Israel;
6.Berlin Brandenburg Inst Adv Biodivers Res BBIB, D-14195 Berlin, Germany
推荐引用方式
GB/T 7714
Bergholz, Kolja,May, Felix,Ristow, Michael,et al. Two Mediterranean annuals feature high within-population trait variability and respond differently to a precipitation gradient[J]. Ben-Gurion University of the Negev,2017,25:48-58.
APA Bergholz, Kolja,May, Felix,Ristow, Michael,Giladi, Itamar,Ziv, Yaron,&Jeltsch, Florian.(2017).Two Mediterranean annuals feature high within-population trait variability and respond differently to a precipitation gradient.BASIC AND APPLIED ECOLOGY,25,48-58.
MLA Bergholz, Kolja,et al."Two Mediterranean annuals feature high within-population trait variability and respond differently to a precipitation gradient".BASIC AND APPLIED ECOLOGY 25(2017):48-58.
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