Species level identification of Antillogorgia spp. recruits identifies multiple pathways of octocoral success on Caribbean reefs
Species level identification of Antillogorgia spp. recruits identifies multiple pathways of octocoral success on Caribbean reefs
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DOI：
10.1007/s00338-020-02014-5
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发表时间：
2020-10-27
期刊：
影响因子：
3.5
通讯作者：
Porto-Hannes, Isabel
中科院分区：
文献类型：
--
作者：
Lasker, Howard R.;Porto-Hannes, Isabel
成功的补充对于种群的维持和复原力至关重要，可能是加勒比一些珊瑚礁上以石珊瑚为主的动物群向以珊瑚为主的动物群过渡的核心。对于固着无脊椎动物，招聘纳入幼虫供应，解决和生存的复合效果。这些过程的相对成功在物种之间不同，成功的招募可以通过不同的生活史策略来实现。招募了六个丰富而广泛的Antillogorgia spp。2009-2012年在小巴哈马银行的六个地点进行了评估。根据微卫星分析，对物种一级的新兵进行鉴定，发现不同物种、地点和年份之间的新兵招募和存活率存在差异。广播产卵种A. americana和A. acerosa的早期招募率和定居后存活率较低。更高水平的招聘成功之间育雏和表面育雏种以下略有不同的早期招聘和生存模式。内亲鱼A. hystrix在五个地点的补充量最高，但低存活率大大降低了其丰度，一年后，它的密度与表面育雏物种A相似。elisabethae和A.二羽状。育雏器有较小的殖民地，产生较少的幼虫比广播产卵的物种，但他们释放有能力的幼虫，这可能是他们较高的招聘率。的Antillogorgia说明了成功的繁殖策略的多样性表现出的珊瑚，和这些同源物之间的生活史策略的差异是最好的特点，其模式的幼虫发展。
Successful recruitment is critical to the maintenance and resilience of populations and may be at the core of the transition from scleractinian- to octocoral-dominated faunas on some Caribbean reefs. For sessile invertebrates, recruitment incorporates the composite effects of larval supply, settlement and survival. The relative success of these processes differs between species, and successful recruitment may be achieved through different life history strategies. Recruitment of six abundant and widespread Antillogorgia spp. was assessed at six sites on Little Bahama Bank from 2009-2012. Identification of recruits to species level, based on microsatellite analyses, revealed differences in recruitment and survival between species, sites and years. The broadcast spawning species, A. americana and A. acerosa, had low rates of early recruitment and post-settlement survival. Higher levels of recruitment success were achieved among brooding and surface brooding species following somewhat different patterns of early recruitment and survival. The internal brooder A. hystrix had the highest recruitment at five of the sites, but low survival dramatically reduced its abundance and after a year it had similar densities as the surface brooding species, A. elisabethae and A. bipinnata. The brooders have smaller colonies and produce fewer larvae than the broadcast spawning species, but they release competent larvae, which may account for their higher recruitment rates. The Antillogorgia illustrate the diversity of successful reproductive strategies exhibited by octocorals, and differences in the life history strategies among these congeners are best characterized by their mode of larval development.