Comparative thermal performance of Orbicella franksi at its latitudinal range limits
Comparative thermal performance of Orbicella franksi at its latitudinal range limits
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Orbicella Franksi 在其纬度范围限制下的热性能比较
DOI：
10.1101/583294
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
H. Putnam
中科院分区：
文献类型：
--
作者：
N. Silbiger;G. Goodbody;J. Bruno;H. Putnam
温度驱动从细胞到生态系统水平的生物反应，随着世界变暖，热敏感性将塑造生物体功能和种群动态。造礁珊瑚由于与单细胞甲藻的内共生关系而对温度敏感，大规模死亡事件的频率和幅度都在增加。本研究的目的是量化的热敏感性的重要生理功能的加勒比造礁珊瑚，Orbicella franksi通过测量的热性能曲线（TPC）。我们比较了TPC指标（热最佳，临界最大值，活化能，失活能，并在标准化温度下的速率）之间的两个种群在北方和南方范围内的地理范围的这个物种。我们进一步比较了一个网站内的基本珊瑚生物过程（总光合作用，呼吸和钙化），以确定哪个功能是最敏感的热应力使用分层贝叶斯建模方法。我们发现的证据表明，热性能的差异，这可能是由于热适应或驯化，更高的TPC指标（热最佳和临界最大值）在温暖的巴拿马，相比，较冷的百慕大。我们还记录了一个种群内基本生物功能的热敏感性的层次结构，呼吸作用不如光合作用敏感，光合作用不如钙化敏感。了解珊瑚的热性能对于预测珊瑚礁的未来至关重要，因为维持珊瑚礁生态系统所需的关键生物功能是热介导的。我们应用热性能曲线的方法，在其地理范围和各种功能的珊瑚礁建筑珊瑚的各种健身相关的参数，以提高我们的理解的固有的热耐受性的变化。
Temperature drives biological responses that scale from the cellular to ecosystem levels and thermal sensitivity will shape organismal functions and population dynamics as the world warms. Reef building corals are sensitive to temperature due to their endosymbiotic relationship with single celled dinoflagellates, with mass mortality events increasing in frequency and magnitude. The purpose of this study was to quantify the thermal sensitivity of important physiological functions of a Caribbean reef-building coral, Orbicella franksi through the measurement of thermal performance curves (TPCs). We compared TPC metrics (thermal optimum, critical maximum, activation energy, deactivation energy, and rate at a standardized temperature) between two populations at the northern and southern extent of the geographic range of this species. We further compared essential coral organismal processes (gross photosynthesis, respiration, and calcification) within a site to determine which function is most sensitive to thermal stress using a hierarchical Bayesian modeling approach. We found evidence for differences in thermal performance, which could be due to thermal adaptation or acclimatization, with higher TPC metrics (thermal optimum and critical maximum) in warmer Panama, compared to cooler Bermuda. We also documented the hierarchy in thermal sensitivity of essential organismal functions within a population, with respiration less sensitive than photosynthesis, which was less sensitive than calcification. Understanding thermal performance of corals is essential for projecting coral reef futures, given that key biological functions necessary to sustain coral reef ecosystems are thermally-mediated. Summary statement We apply a thermal performance curve approach to a variety of fitness related parameters in a reef building coral across its geographic range and various functions to improve our understanding of the inherent variability in thermal tolerance.
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影响因子：
30.7
作者：
Torda, Gergely;Donelson, Jennifer M.;Munday, Philip L.
通讯作者：
Munday, Philip L.
影响因子：
16.6
作者：
Safaie A;Silbiger NJ;McClanahan TR;Pawlak G;Barshis DJ;Hench JL;Rogers JS;Williams GJ;Davis KA
通讯作者：
Davis KA
影响因子：
4.5
作者：
Chollett, Iliana;Mumby, Peter J.;Hu, Chuanmin
通讯作者：
Hu, Chuanmin
影响因子：
16.6
作者：
Oliver ECJ;Donat MG;Burrows MT;Moore PJ;Smale DA;Alexander LV;Benthuysen JA;Feng M;Sen Gupta A;Hobday AJ;Holbrook NJ;Perkins-Kirkpatrick SE;Scannell HA;Straub SC;Wernberg T
通讯作者：
Wernberg T