High juvenile mortality overwhelms benefits of mating potential for reproductive fitness
High juvenile mortality overwhelms benefits of mating potential for reproductive fitness
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高幼体死亡率压倒了交配潜力对生殖健康的好处
DOI：
10.1086/730112
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发表时间：
2024
期刊：
影响因子：
--
通讯作者：
Wagenius, Stuart
中科院分区：
文献类型：
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作者：
Waananen, Amy;Richardson, Lea K;Thoen, Riley D;Nordstrom, Scott W;Eichenberger, Erin G;Kiefer, Gretel;Dykstra, Amy B;Shaw, Ruth G;Wagenius, Stuart
个体获得配偶的机会（即其“交配潜力”）可以限制其繁殖，但也可能通过对后代生存的影响影响其适应性。例如，配偶接近可能与亲缘关系相对应，并导致后代近亲繁殖的抑制。虽然后代的生产和生存可能对交配潜力有不同的反应，但以前的研究并没有考虑到交配潜力对这些健康成分的同时影响。研究了长寿命多年生草本植物紫锥菊（Echinacea angustifolia）种群的交配势与后代产量和存活率的关系。在7年的时间里，我们在14个地点量化了1278次交配中母系植物的交配潜力，并对这些交配的后代进行了8年的跟踪研究。我们使用aster模型来评估交配潜力与8年后出现和存活的后代数量的关系。幼苗出苗率随交配势的增加而增加。尽管如此，8年后存活的后代数量与交配潜力没有关系。我们的研究结果支持了一个更广泛的结论，即交配潜力对适合度的影响随着时间的推移而减弱，因为母亲水平的人口统计学随机性。
An individual’s access to mates (i.e., its “mating potential”) can constrain its reproduction but may also influence its fitness through effects on offspring survival. For instance, mate proximity may correspond with relatedness and lead to inbreeding depression in offspring. While offspring production and survival might respond differently to mating potential, previous studies have not considered the simultaneous effects of mating potential on these fitness components. We investigated the relationship of mating potential with both production and survival of offspring in populations of a long-lived herbaceous perennial,Echinacea angustifolia. Across 7 years and 14 sites, we quantified the mating potential of maternal plants in 1,278 mating bouts and followed the offspring from these bouts over 8 years. We used aster models to evaluate the relationship of mating potential with the number of offspring that emerged and that were alive after 8 years. Seedling emergence increased with mating potential. Despite this, the number of offspring surviving after 8 years showed no relationship to mating potential. Our results support the broader conclusion that the effect of mating potential on fitness erodes over time because of demographic stochasticity at the maternal level.