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物种丰富度和冗余促进酵母利用共生的持久性
2020-10-17 23:06

美国雪城大学Kari A. Segraves等研究人员合作发现,物种丰富度和冗余促进酵母利用共生的持久性。2020年10月16日,国际知名学术期刊《科学》发表了这一成果。

研究人员表示,互惠互利,或互惠互利的种间相互作用,构成了许多生态群落和农业系统的基础。互惠互助有不同的形式,从成对的互动到极为多样化的社群,它们不断受到非互惠社群成员(剥削者)的剥削挑战。
 
因此,了解共生如何持续仍然是生态学中的一个基本问题。理论表明,物种丰富度高和功能冗余可以促进复杂的互惠社群中的互惠主义持久性。
 
通过使用酵母系统(Saccharomyces cerevisiae),研究人员实验性证明,具有最丰富共生主义和功能冗余的社群比简单社群的生存可能性高出将近两倍。持久性增加是因为多样化的社群能够更好地缓解与剥削者竞争的负面影响。因此,大型的互惠网络可以固有地被缓冲以免被利用。
 
附:英文原文

Title: Species richness and redundancy promote persistence of exploited mutualisms in yeast

Author: Mayra C. Vidal, Sheng Pei Wang, David M. Rivers, David M. Althoff, Kari A. Segraves

Issue&Volume: 2020/10/16

Abstract: Mutualisms, or reciprocally beneficial interspecific interactions, constitute the foundation of many ecological communities and agricultural systems. Mutualisms come in different forms, from pairwise interactions to extremely diverse communities, and they are continually challenged with exploitation by nonmutualistic community members (exploiters). Thus, understanding how mutualisms persist remains an essential question in ecology. Theory suggests that high species richness and functional redundancy could promote mutualism persistence in complex mutualistic communities. Using a yeast system (Saccharomyces cerevisiae), we experimentally show that communities with the greatest mutualist richness and functional redundancy are nearly two times more likely to survive exploitation than are simple communities. Persistence increased because diverse communities were better able to mitigate the negative effects of competition with exploiters. Thus, large mutualistic networks may be inherently buffered from exploitation.

DOI: 10.1126/science.abb6703

Source: https://science.sciencemag.org/content/370/6514/346

Science:《科学》,创刊于1880年。隶属于美国科学促进会,最新IF:41.037
官方网址:https://www.sciencemag.org/
投稿链接:https://cts.sciencemag.org/scc/#/login

本期文章:《科学》:Volume 370 Issue 6514

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