Age and intraspecific diversity of resilient Acropora communities in Belize
Age and intraspecific diversity of resilient Acropora communities in Belize
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伯利兹有复原力的鹿角珊瑚群落的年龄和种内多样性
DOI：
10.1007/s00338-017-1602-9
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发表时间：
2017
期刊：
影响因子：
3.5
通讯作者：
Baums, Iliana B.
中科院分区：
文献类型：
--
作者：
Irwin, Adele;Greer, Lisa;Humston, Robert;Devlin-Durante, Meghann;Cabe, Paul;Lescinsky, Halard;Wirth, Karl;Allen Curran, H.;Baums, Iliana B.
珊瑚Acropora palmataandA. cervicornis是重要的加勒比珊瑚礁建设者，近几十年来面临着严重的死亡率。虽然许多研究都集中在这些物种最近的死亡，数据从地区Acroporaspp。继续繁荣的是有限的。了解遗传多样性，招聘，和时间连续性的健康人群，这些campaintenedAcroporaspp。它们形成的杂交种（“鹿角珊瑚”）可能会提供有关它们的人口统计过程的见解。我们研究了三个富含A的珊瑚礁。cervicornis，A. Palmata和杂交Acropora种群，位于珊瑚花园、海牛海峡和落基角的伯利兹龙涎香岛近海。从所有三个Acroporataxa收集样品。我们使用微卫星标记来确定：（1）基因型多样性;（2）支持本地招聘的优势生殖模式;（3）所有三个acroporids的最小和最大遗传年龄估计;（4）在这些网站的混合殖民的历史。我们发现顶孔菌种群是高度克隆的，主要通过无性分裂进行局部补充。我们还估计年龄的10Acroporagenets使用最近的方法的基础上体细胞突变率的遗传数据。结果表明，最低年龄为62-409岁的A。cervicornis，A. palmata，顶孔菌杂种为156-281年。我们的数据表明，现有的A. cervicornis，A. palmata，和Acroporahybrid基因在20世纪80年代Caribbean-wideAcroporaspp.这表明这些地方曾经是加勒比顶孔珊瑚的避难所。此外，我们的数据表明，形成现存的hybridAcroporagenets日期之前的广泛崩溃的父母类群。
The coralsAcropora palmataandA. cervicornisare important Caribbean reef-builders that have faced significant mortality in recent decades. While many studies have focused on the recent demise of these species, data from areas whereAcroporaspp. have continued to thrive are limited. Understanding the genetic diversity, recruitment, and temporal continuity of healthy populations of these threatenedAcroporaspp. and the hybrid they form (“Acropora prolifera”) may provide insights into the demographic processes governing them. We studied three reef sites with abundantA. cervicornis,A. palmata, and hybridAcroporapopulations offshore of Ambergris Caye, Belize at Coral Gardens, Manatee Channel, and Rocky Point. Samples were collected from all threeAcroporataxa. We used microsatellite markers to determine: (1) genotypic diversity; (2) dominant reproductive mode supporting local recruitment; (3) minimum and maximum genet age estimates for all three acroporids; and (4) the history of hybrid colonization at these sites. We found thatAcroporapopulations were highly clonal with local recruitment primarily occurring through asexual fragmentation. We also estimated the ages of 10Acroporagenets using recent methodology based on somatic mutation rates from genetic data. Results indicate minimum ages of 62–409 yr forA. cervicornis,187–561 yr forA. palmata, and 156–281 yr for theAcroporahybrids at these sites. Our data indicate that existingA. cervicornis, A. palmata,andAcroporahybrid genets persisted during the 1980s Caribbean-wideAcroporaspp. collapse, suggesting that these sites have been a refuge for CaribbeanAcroporacorals. Additionally, our data suggest that formation of extant hybridAcroporagenets pre-dates the widespread collapse of the parent taxa.
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作者：
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DOI：
--
发表时间：
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期刊：
影响因子：
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作者：
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