Instituto de Ciências do Mar (LABOMAR), Universidade Federal do Ceará (UFC), Avenida da Abolição, Fortaleza, 3207, Brazil.
Núcleo de Ecologia Aquática e Pesca da Amazônia (NEAP), Universidade Federal do Pará (UFPA), Belém, PA, Brazil.
Sci Rep. 2023 Aug 18;13(1):13469. doi: 10.1038/s41598-023-40407-y.
In 2020, multiple lionfish (Pterois spp.) records along the equatorial Southwestern (SW) Atlantic revealed a new expansion of these potentially damaging invasive populations, which could impact over 3500 km of Brazilian coastline over the next few years, as well as unique ecosystems and marine protected areas in its path. To assess the taxonomic status, invasion route, and correlation with other centres of distribution, we investigated the genetic diversity patterns of lionfish caught in 2022 at the Amazonia, Northeastern Brazil, and Fernando de Noronha and Rocas Atoll ecoregions, using two molecular markers, the mitochondrial COI and the nuclear S7 RP1. The data indicate that all studied lionfish belong to what is generally accepted as P. volitans, and share the same genetic signature as lionfish present in the Caribbean Sea. The shared haplotypes and alleles indicate that the SW Atlantic invasion derives from an active movement of adult individuals from the Caribbean Sea into the Brazilian coast. The Amazon mesophotic reefs likely served as a stepping-stone to overcome the biogeographical barrier represented by the Amazon-Orinoco River plume. New alleles found for S7 RP1 suggest the onset of local genetic diversification, heightening the environmental risks as this bioinvasion heads towards other South Atlantic ecoregions.
2020 年，在赤道西南大西洋（SW 大西洋）沿线发现了多个狮子鱼（Pterois spp.）记录，这表明这些潜在破坏性的入侵种群正在进一步扩张，在未来几年内，这些狮子鱼可能会蔓延至巴西超过 3500 公里的海岸线，以及其行进路径上的独特生态系统和海洋保护区。为了评估其分类地位、入侵途径以及与其他分布中心的相关性，我们使用两种分子标记（线粒体 COI 和核 S7 RP1）调查了 2022 年在亚马逊地区、巴西东北部以及费尔南多-迪诺罗尼亚和罗卡斯环礁生态区捕获的狮子鱼的遗传多样性模式。数据表明，所有研究的狮子鱼都属于通常被认为是 P. volitans 的物种，并且与加勒比海的狮子鱼具有相同的遗传特征。共享的单倍型和等位基因表明，SW 大西洋的入侵是由来自加勒比海的成年个体的积极活动引起的，它们进入了巴西海岸。亚马逊中层礁可能是克服由亚马逊-奥里诺科河羽流代表的生物地理屏障的踏脚石。在 S7 RP1 中发现的新等位基因表明，已经开始出现局部遗传多样化，随着这次生物入侵进入其他南大西洋生态区，环境风险将会加剧。
