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Two Mediterranean annuals feature high within-population trait variability and respond differently to a precipitation gradient

Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet

Standard

Two Mediterranean annuals feature high within-population trait variability and respond differently to a precipitation gradient. / Bergholz, Kolja; May, Felix; Ristow, Michael et al.
in: Basic and Applied Ecology, Jahrgang 25, 01.12.2017, S. 48-58.

Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet

Harvard

Bergholz, K, May, F, Ristow, M, Giladi, I, Ziv, Y & Jeltsch, F 2017, 'Two Mediterranean annuals feature high within-population trait variability and respond differently to a precipitation gradient', Basic and Applied Ecology, Jg. 25, S. 48-58. https://doi.org/10.1016/j.baae.2017.11.001

APA

Bergholz, K., May, F., Ristow, M., Giladi, I., Ziv, Y., & Jeltsch, F. (2017). Two Mediterranean annuals feature high within-population trait variability and respond differently to a precipitation gradient. Basic and Applied Ecology, 25, 48-58. https://doi.org/10.1016/j.baae.2017.11.001

Vancouver

Bergholz K, May F, Ristow M, Giladi I, Ziv Y, Jeltsch F. Two Mediterranean annuals feature high within-population trait variability and respond differently to a precipitation gradient. Basic and Applied Ecology. 2017 Dez 1;25:48-58. doi: 10.1016/j.baae.2017.11.001

Bibtex

@article{38096f40947447c29b8e23eadf179de3,
title = "Two Mediterranean annuals feature high within-population trait variability and respond differently to a precipitation gradient",
abstract = "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 towards aridity, 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.",
keywords = "Gender and Diversity, Environmental planning, Ecosystems Research, Climate Change, Functional ecology, Plant height, Drought stress, Rainfall gradient, Trait-environment relationship, Local adaption, Phenotypic plasticity",
author = "Kolja Bergholz and Felix May and Michael Ristow and Itamar Giladi and Yaron Ziv and Florian Jeltsch",
year = "2017",
month = dec,
day = "1",
doi = "10.1016/j.baae.2017.11.001",
language = "English",
volume = "25",
pages = "48--58",
journal = "Basic and Applied Ecology",
issn = "1439-1791",
publisher = "Elsevier GmbH",

}

RIS

TY - JOUR

T1 - Two Mediterranean annuals feature high within-population trait variability and respond differently to a precipitation gradient

AU - Bergholz, Kolja

AU - May, Felix

AU - Ristow, Michael

AU - Giladi, Itamar

AU - Ziv, Yaron

AU - Jeltsch, Florian

PY - 2017/12/1

Y1 - 2017/12/1

N2 - 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 towards aridity, 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.

AB - 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 towards aridity, 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.

KW - Gender and Diversity

KW - Environmental planning

KW - Ecosystems Research

KW - Climate Change

KW - Functional ecology

KW - Plant height

KW - Drought stress

KW - Rainfall gradient

KW - Trait-environment relationship

KW - Local adaption

KW - Phenotypic plasticity

UR - http://www.scopus.com/inward/record.url?scp=85034792677&partnerID=8YFLogxK

U2 - 10.1016/j.baae.2017.11.001

DO - 10.1016/j.baae.2017.11.001

M3 - Journal articles

VL - 25

SP - 48

EP - 58

JO - Basic and Applied Ecology

JF - Basic and Applied Ecology

SN - 1439-1791

ER -

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