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传粉者有助于维持开花植物的多样性
2021-09-12 12:51

美国匹兹堡大学Tia-Lynn Ashman、Na Wei等研究人员合作发现,传粉者有助于维持开花植物的多样性。相关论文于2021年9月8日在线发表于国际学术期刊《自然》。

研究人员利用系统发育结构方程模型,将植物-授粉者和种间花粉传递网络与花的功能特征结合起来,从而表明授粉者使用的微环境分区和不对称促进作用为生物多样性热点地区的稀有物种赋予适应优势。共同开花的物种通过花的特征来过滤授粉者,稀有物种显示出更大的授粉者专业化,导致比更丰富的物种有更高授粉介导的雄性和雌性适应能力。

当植物共享授粉者资源时,通过花粉运输动态的不对称促进作用使较稀少的物种受益,并以较丰富的物种为代价,从而作为一种替代的多样性促进机制。这些研究结果强调了全群落的植物-授粉者互动的重要性,这种互动影响到生物多样性的维持。

据悉,有利于稀有物种的机制是维持多样化群落的关键。保护开花植物生物多样性最关键的任务之一是了解植物与授粉者的相互作用如何有助于维护稀有物种。

附:英文原文

Title: Pollinators contribute to the maintenance of flowering plant diversity

Author: Wei, Na, Kaczorowski, Rainee L., Arceo-Gmez, Gerardo, ONeill, Elizabeth M., Hayes, Rebecca A., Ashman, Tia-Lynn

Issue&Volume: 2021-09-08

Abstract: Mechanisms that favour rare species are key to the maintenance of diverse communities1,2,3. One of the most critical tasks for conservation of flowering plant biodiversity is to understand how plant–pollinator interactions contribute to the maintenance of rare species4,5,6,7. Here we show that niche partitioning in pollinator use and asymmetric facilitation confer fitness advantage of rarer species in a biodiversity hotspot using phylogenetic structural equation modelling that integrates plant–pollinator and interspecific pollen transfer networks with floral functional traits. Co-flowering species filtered pollinators via floral traits, and rarer species showed greater pollinator specialization leading to higher pollination-mediated male and female fitness than more abundant species. When plants shared pollinator resources, asymmetric facilitation via pollen transport dynamics benefitted the rarer species at the cost of more abundant species, serving as an alternative diversity-promoting mechanism. Our results emphasize the importance of community-wide plant–pollinator interactions that affect reproduction for biodiversity maintenance.

DOI: 10.1038/s41586-021-03890-9

Source: https://www.nature.com/articles/s41586-021-03890-9

Nature:《自然》,创刊于1869年。隶属于施普林格·自然出版集团,最新IF:43.07
官方网址:http://www.nature.com/
投稿链接:http://www.nature.com/authors/submit_manuscript.html


本期文章:《自然》:Online/在线发表

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