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How do coral energy strategies influence their survival?

珊瑚能量策略如何影响它们的生存？

基本信息

批准号：
2882474
负责人：
金额：
--
依托单位：
Bangor University
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2023
资助国家：
英国
起止时间：
2023 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2882474
关键词：
How do coral energy strategies

项目摘要

Most reef-building corals harness autotrophic nutrition from their photosynthetic algalendosymbionts and heterotrophic nutrition via predation of plankton. This flexible trophic strategyis thought to underpin their ability to colonise a range of depths, habitats and oceanographiccontexts that vary in energetic resource supply (Williams et al. 2018 Mar Biol; Fox et al. 2018Current Biology). Laboratory experiments suggest heterotrophic feeding might explain the abilityof some corals to persist in challenging environments, including highly turbid reefs where sunlightis rapidly attenuated. This is because heterotrophy provides a valuable nutritional source thatsupports coral growth despite reduced autotrophic contributions from the algal endosymbionts(Grotolli et al. 2006 Nature). Coastal darkening, a consequence of increasingly turbid nearshorewaters, is impacting coral reefs worldwide. Nevertheless, we know very little about how coraltrophic strategies vary in response to spatial and temporal gradients in resource availability andwhether trophic plasticity enables some corals to persist under these increasingly challengingcoastal conditions. Identifying mechanisms that enable coral survival across gradients in resourceavailability is key to understanding whether and how coral reefs will adapt as our coastal waterssteadily grow darker (Williams & Graham 2019 Funct Ecol).

大多数造礁珊瑚利用其光合藻类的自养营养和通过捕食浮游生物的异养营养。这种灵活的营养策略被认为是它们在能量资源供应不同的深度、栖息地和海洋环境中殖民的能力的基础（Williams et al. 2018 Mar Biol; Fox et al. 2018 current Biology）。实验室实验表明，异养喂养可能解释了一些珊瑚在具有挑战性的环境中坚持生存的能力，包括阳光迅速减弱的高度浑浊的珊瑚礁。这是因为异养提供了有价值的营养来源，支持珊瑚生长，尽管减少了藻类内共生生物的自养贡献（Grotolli et al. 2006 Nature）。近岸水域日益浑浊导致的海岸变黑正在影响世界各地的珊瑚礁。然而，我们对珊瑚营养策略如何随资源可用性的时空梯度而变化以及营养可塑性是否使一些珊瑚能够在这些日益具有挑战性的沿海条件下持续存在知之甚少。确定使珊瑚能够跨资源可用性梯度生存的机制是了解珊瑚礁是否以及如何适应我们的沿海水域逐渐变暗的关键（Williams & Graham 2019 Funct Ecol）。