Y. H. Shi, G. S. Zhou, Y. L. Jiang, H. Wang, Z. Z. Xu
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引用次数: 0
Abstract
Elevated atmospheric CO2 concentration and precipitation change affect plants’ survival and thriving. Phenotypic plasticity can show plants adaptability to varying environment. Physiological plasticity reflects plants capacity to open areas, and morphological plasticity reflects capacity to survive and grow. In this study, we simulated combined effects of elevated CO2 and precipitation change on the phenotypic plasticity of two Stipa species: Stipa grandis and Stipa breviflora. Our results indicated that plasticity of physiology was higher than plasticity of morphology under either ambient or elevated CO2 concentration in both Stipa species. S. breviflora showed higher plasticity index of physiological (PIp) and plasticity index of morphological (PIm) than S. grandis under elevated CO2 concentration. Therefore, we speculate that S. breviflora is more adaptable than S. grandis under high CO2 concentration in the future. Elevated atmospheric CO2 concentration and simultaneous precipitation change is advantageous to S. breviflora distribution expansion, nonetheless, the changing environments also favor the competitive ability of S. grandis.
摘要大气中二氧化碳浓度的升高和降水量的变化会影响植物的生存和生长。表型可塑性可以显示植物对不同环境的适应能力。生理可塑性反映了植物的开阔能力，而形态可塑性则反映了植物的生存和生长能力。在这项研究中，我们模拟了高浓度二氧化碳和降水变化对两种 Stipa 植物表型可塑性的综合影响：Stipa grandis和Stipa breviflora的表型可塑性。结果表明，在环境或高浓度 CO2 条件下，两种 Stipa 的生理可塑性均高于形态可塑性。在 CO2 浓度升高的条件下，S. breviflora 的生理可塑性指数（PIp）和形态可塑性指数（PIm）均高于 S. grandis。因此，我们推测，未来在高浓度 CO2 条件下，绣线菊的适应性比鹅掌楸强。大气中二氧化碳浓度的升高和降水量的同步变化有利于布袋莲分布范围的扩大，但环境的变化也有利于布袋莲竞争能力的提高。
期刊介绍：
Contemporary Problems of Ecology is a multidisciplinary periodical that publishes original works on the following subjects: theoretical and methodical issues of ecology, regional aspects of ecology, regional ecological disasters, structure and functioning of ecosystems, anthropogenic transformation of ecosystems. All basic aspects of modern ecology, including the most complicated interactions between living organisms and their environment, are presented. Some of the journal issues are dedicated to global changes in biological diversity at various levels of organization (populations, species, ecosystems) principles and methods of nature conservation.
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