摩洛哥干旱梯度上原生野生橄榄(Olea europaea L.)叶片和大小特征的环境依赖性和种内变异:功能视角

IF 1.9 4区 环境科学与生态学 Q3 ECOLOGY
Jalal Kassout, Jean-Frédéric Terral, Houda Souali, Mohammed Ater
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引用次数: 0

摘要

了解植物对干旱的适应策略对生态研究至关重要,尤其是在当前气候变化和干旱加剧的背景下。本研究重点关注广泛分布于摩洛哥的地中海盆地最具代表性的物种之一--野橄榄(Olea europaea subsp.这项研究的基础是测量 13 个种群 130 棵树在不同气候条件和植被覆盖下的九个叶片和植株大小相关性状。该研究探讨了野生橄榄树应对日益干旱和干旱化的适应策略。结果表明,这九个性状在环境梯度上表现出显著的协变趋势,反映了植物在资源获取、资源投资和水分利用方面的策略。野生橄榄树在种群之间和种群内部都表现出巨大的种内差异,以应对这些环境梯度。气候、海拔和植被共同解释了 93.8% 的性状协变。该研究阐明了野生橄榄树应对压力条件的适应策略的基本机制。研究结果表明,野生橄榄树通过采取保守策略来适应压力环境,这种策略的特点是降低资源投入和提高水分利用效率。这项研究强调了考虑植物对环境压力反应的种内变异的重要性,并证明了基于性状的方法在了解植物在这种条件下的策略方面的实用性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Environment-dependent and intraspecific variations in leaf and size traits of a native wild olive (Olea europaea L.) along an aridity gradient in Morocco: a functional perspective

Environment-dependent and intraspecific variations in leaf and size traits of a native wild olive (Olea europaea L.) along an aridity gradient in Morocco: a functional perspective

Understanding plant adaptive strategies to aridity is crucial for ecological research, particularly in the current context of climate change and increasing drought. This study focuses on the intraspecific phenotypic variation of the wild olive (Olea europaea subsp. europaea var. sylvestris), one of the most emblematic species of the Mediterranean Basin, widely distributed in Morocco. The research is based on measuring nine leaf and plant-size related traits in 130 trees across 13 populations under varying climate conditions and vegetation covers. The study explores the adaptive strategies of wild olive trees in response to increasing aridity and aridification. The results indicate that the nine traits exhibit significant covariation trends along environmental gradients, reflecting plant strategies related to resource acquisition, resource investment, and water use. Wild olive trees demonstrate substantial intraspecific variation both among and within populations in response to these environmental gradients. Climate, altitude, and vegetation cover together explain 93.8% of the trait covariations. The study elucidates the mechanisms underlying the adaptive strategies of wild olive trees to cope with stressful conditions. The findings suggest that wild olive trees adapt to stressful environments by adopting a conservative strategy, characterized by lower resource investment and higher water-use efficiency. This research underscores the importance of considering intraspecific variation in plant responses to environmental stressors and demonstrates the utility of trait-based approaches in understanding plant strategies under such conditions.

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来源期刊
Plant Ecology
Plant Ecology 环境科学-林学
CiteScore
3.40
自引率
0.00%
发文量
58
审稿时长
8.6 months
期刊介绍: Plant Ecology publishes original scientific papers that report and interpret the findings of pure and applied research into the ecology of vascular plants in terrestrial and wetland ecosystems. Empirical, experimental, theoretical and review papers reporting on ecophysiology, population, community, ecosystem, landscape, molecular and historical ecology are within the scope of the journal.
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