气候变化领域集成服务门户(CCPortal): Heat stress destabilizes symbiotic nutrient cycling in corals

CCPortal

DOI	10.1073/pnas.2022653118
	Heat stress destabilizes symbiotic nutrient cycling in corals
	Rädecker N.; Pogoreutz C.; Gegner H.M.; Cárdenas A.; Roth F.; Bougoure J.; Guagliardo P.; Wild C.; Pernice M.; Raina J.-B.; Meibom A.; Voolstra C.R.
发表日期	2021
ISSN	00278424
卷号	118 期号:5
英文摘要	Recurrent mass bleaching events are pushing coral reefs worldwide to the brink of ecological collapse. While the symptoms and consequences of this breakdown of the coral–algal symbiosis have been extensively characterized, our understanding of the underlying causes remains incomplete. Here, we investigated the nutrient fluxes and the physiological as well as molecular responses of the widespread coral Stylophora pistillata to heat stress prior to the onset of bleaching to identify processes involved in the breakdown of the coral–algal symbiosis. We show that altered nutrient cycling during heat stress is a primary driver of the functional breakdown of the symbiosis. Heat stress increased the metabolic energy demand of the coral host, which was compensated by the catabolic degradation of amino acids. The resulting shift from net uptake to release of ammonium by the coral holobiont subsequently promoted the growth of algal symbionts and retention of photosynthates. Together, these processes form a feedback loop that will gradually lead to the decoupling of carbon translocation from the symbiont to the host. Energy limitation and altered symbiotic nutrient cycling are thus key factors in the early heat stress response, directly contributing to the breakdown of the coral–algal symbiosis. Interpreting the stability of the coral holobiont in light of its metabolic interactions provides a missing link in our understanding of the environmental drivers of bleaching and may ultimately help uncover fundamental processes underpinning the functioning of endosymbioses in general. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Coral bleaching; Endosymbiosis; Metabolic interaction; Resource competition; Selfish symbiont
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180799
作者单位	Red Sea Research Center, Division of Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955, Saudi Arabia; Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, 1015, Switzerland; Department of Biology, University of Konstanz, Konstanz, 78457, Germany; Metabolomics Core Technology Platform, Centre for Organismal Studies, University of Heidelberg, Heidelberg, 69117, Germany; Baltic Sea Centre, Stockholm University, Stockholm, 10691, Sweden; Tvärminne Zoological Station, University of Helsinki, Hanko, 10900, Finland; Centre for Microscopy, Characterisation and Analysis, University of Western Australia, Perth, WA 6009, Australia; Marine Ecology Department, Faculty of Biology and Chemistry, University of Bremen, Bremen, 28359, Germany; Climate Change Cluster, Faculty of Science, University of Technology Sydney, Ultimo, NSW 2007, Australia; Center...
推荐引用方式 GB/T 7714	Rädecker N.,Pogoreutz C.,Gegner H.M.,et al. Heat stress destabilizes symbiotic nutrient cycling in corals[J],2021,118(5).
APA	Rädecker N..,Pogoreutz C..,Gegner H.M..,Cárdenas A..,Roth F..,...&Voolstra C.R..(2021).Heat stress destabilizes symbiotic nutrient cycling in corals.Proceedings of the National Academy of Sciences of the United States of America,118(5).
MLA	Rädecker N.,et al."Heat stress destabilizes symbiotic nutrient cycling in corals".Proceedings of the National Academy of Sciences of the United States of America 118.5(2021).