The potential for self-seeding by the coral Pocillopora spp. in Moorea, French Polynesia.

The potential for self-seeding by the coral Pocillopora spp. in Moorea, French Polynesia.
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DOI:
10.7717/peerj.2544
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发表时间:
2016
期刊:
影响因子:
2.7
通讯作者:
Edmunds PJ
Edmunds PJ
中科院分区:
生物学3区
文献类型:
--
作者:
Tsounis G;Edmunds PJ

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2006年至2010年,法属波利尼西亚莫雷阿岛的珊瑚礁因被浮游海星捕食而遭受灾难性的珊瑚死亡,2010年的奥利气旋也造成了灾难性的珊瑚死亡,但到2015年,一些珊瑚种群已接近干扰前的大小。使用长期的研究地块,我们量化的产卵Pocilloppora属的种群动态。在2010年至2014年期间,沿着莫雷阿岛的北岸,并认为有证据表明,人口恢复可以通过自我播种来支持。结果按比例从研究地块和解决瓷砖表明,Pocilloppora属的数量。2010年至2014/2015年期间,外礁上的群体增加了1,890倍,2010年至2014/2015年期间,后礁增加了8倍。假设产卵Pocilloppora spp.在莫雷阿释放类似数量的鸡蛋在夏威夷的同类,受精成功是类似于其他产卵珊瑚,Pocilloppora种的能力。产生幼虫的能力。这些估计表明,Pocilloppora spp.在2010年和2014年,即使假设99.9%的幼虫不在莫雷阿岛招募,但相对于2010年和2014年在后礁和外礁发现的新兵所需的数量,莫雷阿岛的幼鱼在2010年和2014年大量过剩。在一年中,只有不到三分之一的新成员必须存活下来才能产生幼孔珊瑚。在2010年和2014/2015年在后礁和外礁发现。我们的一阶近似揭示了Pocillopora spp.在莫雷阿岛的北岸生产足够的幼虫,以支持当地的招聘和人口恢复后,灾难性的干扰。
Coral reefs in Moorea, French Polynesia, suffered catastrophic coral mortality through predation by Acanthaster planci from 2006 to 2010, and Cyclone Oli in 2010, yet by 2015 some coral populations were approaching pre-disturbance sizes. Using long-term study plots, we quantified population dynamics of spawning Pocillopora spp. along the north shore of Moorea between 2010 and 2014, and considered evidence that population recovery could be supported by self-seeding. Results scaled up from study plots and settlement tiles suggest that the number of Pocillopora spp. colonies on the outer reef increased 1,890-fold between 2010 and 2014/2015, and in the back reef, 8-fold between 2010 and 2014/2015. Assuming that spawning Pocillopora spp. in Moorea release similar numbers of eggs as con-generics in Hawaii, and fertilization success is similar to other spawning corals, the capacity of Pocillopora spp. to produce larvae was estimated. These estimates suggest that Pocillopora spp. in Moorea produced a large excess of larvae in 2010 and 2014 relative to the number required to produce the recruits found in the back reef and outer reef in 2010 and 2014, even assuming that ∼99.9% of the larvae do not recruit in Moorea. Less than a third of the recruits in one year would have to survive to produce the juvenile Pocillopora spp. found in the back and outer reefs in 2010 and 2014/2015. Our first order approximations reveal the potential for Pocillopora spp. on the north shore of Moorea to produce enough larvae to support local recruitment and population recovery following a catastrophic disturbance.
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