Coral husbandry for ocean futures: leveraging abiotic factors to increase survivorship, growth, and resilience in juvenile Montipora capitata
Coral husbandry for ocean futures: leveraging abiotic factors to increase survivorship, growth, and resilience in juvenile Montipora capitata
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DOI：
10.3354/meps13534
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发表时间：
2021-01-07
影响因子：
2.5
通讯作者：
Drury, Crawford
中科院分区：
文献类型：
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作者：
Hancock, Joshua R.;Barrows, Andrew R.;Drury, Crawford
在面对全球和局部压力(如海洋变暖)时，通过直接种植有性繁殖的幼年珊瑚来恢复珊瑚礁是维持珊瑚礁生态系统功能的一项关键战略。为了提高我们扩大规模的能力和最大限度地提高恢复倡议的效率，我们研究了非生物条件(即幼虫饲养温度、底物条件、光照强度和流速)如何相互作用来提高有性繁殖的头状单孢子虫幼虫定居后的存活和生长。在幼虫发育过程中，将幼虫在3种温度(高：28.9℃，环境：27.2℃，低：24.5℃)下饲养72h，然后放置在含有海水(1或10wk)的文石塞上，并在不同的光照和流动条件下饲养。2019年夏天，这些幼年珊瑚在美国夏威夷的O‘ahu的Kane’ohe Bay经历了一次自然漂白事件，使我们能够在生存和生长之外，机会主义地测量漂白反应。这项研究证明了利用光照和水流可以提高头状沼虾幼体的存活率和生长。相反，幼虫的预适应和底物处理对存活、生长或漂白反应的总体影响很小。重要的是，除了对漂白的耐受性之外，没有最佳的非生物条件组合来最大化生存和生长。这项研究强调了通过解决知识差距和纳入可提高繁殖种群复原力的做法，为特定恢复目标量身定做有性繁殖的能力。
Reef restoration via direct outplanting of sexually propagated juvenile corals is a key strategy in preserving coral reef ecosystem function in the face of global and local stressors (e.g. ocean warming). To advance our capacity to scale and maximize the efficiency of restoration initiatives, we examined how abiotic conditions (i.e. larval rearing temperature, substrate condition, light intensity, and flow rate) interact to enhance post-settlement survival and growth of sexually propagated juvenile Montipora capitata. Larvae were reared at 3 temperatures (high: 28.9 degrees C, ambient: 27.2 degrees C, low: 24.5 degrees C) for 72 h during larval development, and were subsequently settled on aragonite plugs conditioned in seawater (1 or 10 wk) and raised in different light and flow regimes. These juvenile corals underwent a natural bleaching event in Kane'ohe Bay, O'ahu, Hawai'i (USA), in summer 2019, allowing us to opportunistically measure bleaching response in addition to survivorship and growth. This study demonstrates how leveraging light and flow can increase the survivorship and growth of juvenile M. capitata. In contrast, larval preconditioning and substrate conditioning had little overall effect on survivorship, growth, or bleaching response. Importantly, there was no optimal combination of abiotic conditions that maximized survival and growth in addition to bleaching tolerances. This study highlights the ability to tailor sexual reproduction for specific restoration goals by addressing knowledge gaps and incorporating practices that could improve resilience in propagated stocks.