中国动物传粉植物花瓣大小对气候和海拔梯度的响应

IF 2.3 2区 生物学 Q2 ECOLOGY
Siyu Chen, Jiayi Lu, Yuran Dong, Yao Li, Lingfeng Mao
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引用次数: 0

摘要

植物生殖结构的进化适应,包括被子植物的花瓣大小,是由自然选择和生态条件共同驱动的。虽然以前的研究强调了传粉媒介对花瓣性状的选择,但在了解非生物因素、生物相互作用和生活史权衡如何在广泛的环境梯度中共同塑造花瓣大小方面仍然存在重大差距。本研究结合国家植物区系数据库的性状数据、物种分布记录和高分辨率气候变量,对中国不同气候区域的10228种动物传粉被子植物进行了宏观地理分析。利用层次回归、方差划分和阈值检测模型,研究了海拔、纬度、温度和降水对绝对花瓣大小及其与株高之比(MR)的影响,并对比了木本植物和草本植物的生活史。主要研究结果表明:(1)在海拔3200 m以上、年降水量1100 mm以上,草本植物花瓣大小呈非线性阈值急剧下降;(2)海拔是MR的主要预测因子,解释了30%的变异,特别是在高寒地区,尽管植物矮化,但花的显著性增加;(3)木本植物和草本植物的策略存在差异,木本植物在温暖气候下优先考虑绝对花瓣大小,而草本植物在高海拔胁迫下放大MR;(4)气候-地理相互作用解释了62%-71%的性状变异,突出了传粉者吸引力和胁迫耐受性之间的环境依赖权衡。这项工作提供了一个全面的框架,将花瓣大小性状与大陆尺度上的多变量环境梯度联系起来,为气候变化下植物的适应策略提供了重要的见解,并强调了海拔介导的选择是植物多样性的关键驱动因素。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Size Variation in Flower Petals of Chinese Animal-Pollinated Plants in Response to Climatic and Altitudinal Gradients

Size Variation in Flower Petals of Chinese Animal-Pollinated Plants in Response to Climatic and Altitudinal Gradients

The evolutionary adaptations of plant reproductive structures, including angiosperm petal size, are driven by a combination of natural selection influenced by ecological conditions. While previous studies have emphasized pollinator-driven selection on petal traits, significant gaps remain in understanding how abiotic factors, biotic interactions, and life-history trade-offs jointly shape petal size across broad environmental gradients. This study integrates macrogeographic analyses of 10,228 animal-pollinated angiosperm species across China's diverse climatic regions, combining trait data from national flora databases, species distribution records, and high-resolution climate variables. Using hierarchical regression, variance partitioning, and threshold detection models, we disentangle the effects of altitude, latitude, temperature, and precipitation on absolute petal size and its ratio to plant height (MR), while contrasting woody and herbaceous life histories. Key findings reveal: (1) nonlinear thresholds in environmental drivers, with herbaceous petal size declining sharply above 3200 m altitude and 1100 mm annual precipitation; (2) altitude as the dominant predictor of MR, explaining 30% of variance, particularly in alpine zones where floral conspicuousness increases despite plant dwarfing; (3) divergent strategies between woody and herbaceous species, where woody plants prioritize absolute petal size in warm climates, while herbaceous species amplify MR under high-altitude stress; and (4) climate-geography interactions explaining 62%–71% of trait variation, highlighting context-dependent trade-offs between pollinator attraction and stress tolerance. This work provides a comprehensive framework linking petal size traits to multivariate environmental gradients at continental scales, offering critical insights into plant adaptive strategies under climate change and emphasizing altitude-mediated selection as a key driver of floral diversity.

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来源期刊
CiteScore
4.40
自引率
3.80%
发文量
1027
审稿时长
3-6 weeks
期刊介绍: Ecology and Evolution is the peer reviewed journal for rapid dissemination of research in all areas of ecology, evolution and conservation science. The journal gives priority to quality research reports, theoretical or empirical, that develop our understanding of organisms and their diversity, interactions between them, and the natural environment. Ecology and Evolution gives prompt and equal consideration to papers reporting theoretical, experimental, applied and descriptive work in terrestrial and aquatic environments. The journal will consider submissions across taxa in areas including but not limited to micro and macro ecological and evolutionary processes, characteristics of and interactions between individuals, populations, communities and the environment, physiological responses to environmental change, population genetics and phylogenetics, relatedness and kin selection, life histories, systematics and taxonomy, conservation genetics, extinction, speciation, adaption, behaviour, biodiversity, species abundance, macroecology, population and ecosystem dynamics, and conservation policy.
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