Hurricane-driven patterns of clonality in an ecosystem engineer: the Caribbean coral Montastraea annularis.
Hurricane-driven patterns of clonality in an ecosystem engineer: the Caribbean coral Montastraea annularis.
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DOI：
10.1371/journal.pone.0053283
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Mumby PJ
中科院分区：
文献类型：
--
作者：
Foster NL;Baums IB;Sanchez JA;Paris CB;Chollett I;Agudelo CL;Vermeij MJ;Mumby PJ
性招募比率低的K-选定物种可利用储存效应，在这种情况下，低成虫死亡率使一些个体能够坚持一段时间，直到出现有利的招募时期。如果在人为干扰和气候变化日益加剧的情况下，有性招募的有利条件减少，替代招募方法对这类物种可能变得越来越重要。在这里，我们测试了这样的假设，即无性扩散不仅在分枝珊瑚中是一种完整的生活史策略，正如之前报道的那样，而且在柱状的K-精选珊瑚物种中也是如此，而且它的流行是由严重飓风干扰的频率驱动的。环状Montastraea是加勒比珊瑚礁的长期主要框架建造者，但其生存受到气候引起的干扰的后果的威胁，如漂白、海洋酸化和疾病流行增加。用6个多态微卫星基因座对来自加勒比海18个珊瑚礁的700个环状分枝杆菌样本进行了基因分型。我们证明了无性繁殖在整个物种范围内以不同的频率发生，并显著地促进了当地环纹夜蛾的丰度，其贡献在飓风频率较高的地区增加。我们测试了几个相互竞争的假说，这些假说可能可以解释观察到的基因多样性模式。用飓风发生率和礁坡度解释了地点间基因多样性差异的%，表明大范围干扰与当地生境特征相结合，形成了环纹夜蛾种群有性繁殖和无性繁殖之间的平衡。
K-selected species with low rates of sexual recruitment may utilise storage effects where low adult mortality allows a number of individuals to persist through time until a favourable recruitment period occurs. Alternative methods of recruitment may become increasingly important for such species if the availability of favourable conditions for sexual recruitment decline under rising anthropogenic disturbance and climate change. Here, we test the hypotheses that asexual dispersal is an integral life history strategy not only in branching corals, as previously reported, but also in a columnar, ‘K-selected’ coral species, and that its prevalence is driven by the frequency of severe hurricane disturbance. Montastraea annularis is a long-lived major frame-work builder of Caribbean coral reefs but its survival is threatened by the consequences of climate induced disturbance, such as bleaching, ocean acidification and increased prevalence of disease. 700 M. annularis samples from 18 reefs within the Caribbean were genotyped using six polymorphic microsatellite loci. We demonstrate that asexual reproduction occurs at varying frequency across the species-range and significantly contributes to the local abundance of M. annularis, with its contribution increasing in areas with greater hurricane frequency. We tested several competing hypotheses that might explain the observed pattern of genotypic diversity. 64% of the variation in genotypic diversity among the sites was explained by hurricane incidence and reef slope, demonstrating that large-scale disturbances combine with local habitat characteristics to shape the balance between sexual and asexual reproduction in populations of M. annularis.
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影响因子：
3.5
作者：
BYTHELL, JC;GLADFELTER, EH;BYTHELL, M
通讯作者：
BYTHELL, M
影响因子：
2.4
作者：
BAK, RPM;ENGEL, MS
通讯作者：
ENGEL, MS
影响因子：
2.4
作者：
DUSTAN, P
通讯作者：
DUSTAN, P
影响因子：
3.4
作者：
ERIKSSON, O
通讯作者：
ERIKSSON, O
影响因子：
64.8
作者：
Elsner, James B.;Kossin, James P.;Jagger, Thomas H.
通讯作者：
Jagger, Thomas H.