Evolutionary double suicide in symbiotic systems
Evolutionary double suicide in symbiotic systems
复制标题
共生系统中的进化双重自杀
DOI：
10.1111/ele.14136
复制
发表时间：
2023
期刊：
影响因子：
8.8
通讯作者：
Sasaki Akira
中科院分区：
文献类型：
--
作者：
Uchiumi Yu;Sato Masato;Sasaki Akira
互惠互利被认为面临着共同灭绝的威胁，因为一个成员物种的丧失可能导致另一个成员的灭绝。尽管人们普遍强调这种连锁效应的危险，但到目前为止，导致物种灭绝的进化原因一直没有得到太多重视。在这里，我们通过从理论上考察共生体对宿主的开发和宿主对共生的依赖的共同进化，来研究在互惠关系中如何触发灭绝，以及对伙伴丧失的进化反应是否可以防止附带灭绝。我们的模型表明，与寄生进化相比，互惠合作更容易通过适应性进化(进化双重自杀)而共同灭绝。此外，它还表明，进化性双重自杀的风险很少会促使向后进化到自治(非共生)状态。我们的结果为我们提供了一个新的视角来看待互惠共生的进化脆弱性，以及观察到的从互惠共生到寄生的罕见进化转变。
Mutualism is thought to face a threat of coextinction cascade because the loss of a member species could lead to the extinction of the other member. Despite this common emphasis on the perils of such knock‐on effect, hitherto, the evolutionary causes leading to extinction have been less emphasised. Here, we examine how extinction could be triggered in mutualism and whether an evolutionary response to partner loss could prevent collateral extinctions, by theoretically examining the coevolution of the host exploitation by symbionts and host dependence on symbiosis. Our model reveals that mutualism is more vulnerable to co‐extinction through adaptive evolution (evolutionary double suicide) than parasitism. Additionally, it shows that the risk of evolutionary double suicide rarely promotes the backward evolution to an autonomous (non‐symbiotic) state. Our results provide a new perspective on the evolutionary fragility of mutualism and the rarity of observed evolutionary transitions from mutualism to parasitism.