Unexpected mismatches in population structure among marine mussel life-history stages reveal the true scales of planktonic larval dispersal

IF 5.1 2区 地球科学 Q1 LIMNOLOGY Limnology and Oceanography Letters Pub Date : 2024-09-23 DOI:10.1002/lol2.10439
Jody-Carynn Oliver, Francesca Porri, Arsalan Emami-Khoyi, Peter R. Teske
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Abstract

Studies investigating gene flow in sessile or sedentary marine species typically draw conclusions about larval dispersal by investigating genetic structure of adults. Here, we generated microsatellite data from adults, recruits, settlers and planktonic larvae of the brown mussel, Perna perna, from the southeast coast of South Africa, and identified a consistent mismatch in genetic structure between the adults and all earlier life stages. While adults could be assigned to two major geographical groups (western and eastern), most of the early-stage mussels were strongly affiliated with the eastern group. This suggests that few of the early-stage individuals present in the western portion of the sampling range will eventually establish themselves in the adult population, highlighting the importance of post-recruitment processes as drivers of population structure. Our findings caution against the exclusive use of genetic data generated from adults to assess population connectivity facilitated by the dispersal of planktonic propagules.

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海洋贻贝生命史各阶段种群结构的意外错配揭示了浮游幼体扩散的真实规模
调查无梗或定居海洋物种基因流动的研究通常通过调查成体的遗传结构来得出幼体扩散的结论。在这里,我们从南非东南海岸的褐贻贝(Perna perna)的成体、新兵、定居者和浮游幼虫中获得了微卫星数据,发现成体和所有早期生命阶段的遗传结构存在一致的不匹配。虽然成体可归属于两个主要的地理群体(西部和东部),但大多数早期贻贝与东部群体有很强的关联性。这表明,采样范围西部的早期贻贝个体最终很少能在成体种群中立足,这突出了后招募过程作为种群结构驱动因素的重要性。我们的研究结果提醒我们,不要完全使用成体产生的遗传数据来评估浮游繁殖体扩散所促进的种群连通性。
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来源期刊
CiteScore
10.00
自引率
3.80%
发文量
63
审稿时长
25 weeks
期刊介绍: Limnology and Oceanography Letters (LO-Letters) serves as a platform for communicating the latest innovative and trend-setting research in the aquatic sciences. Manuscripts submitted to LO-Letters are expected to present high-impact, cutting-edge results, discoveries, or conceptual developments across all areas of limnology and oceanography, including their integration. Selection criteria for manuscripts include their broad relevance to the field, strong empirical and conceptual foundations, succinct and elegant conclusions, and potential to advance knowledge in aquatic sciences.
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