Coral bleaching response is unaltered following acclimatization to reefs with distinct environmental conditions

被引:44
|
作者
Barott, Katie L. [1 ]
Huffmyer, Ariana S. [2 ,3 ]
Davidson, Jennifer M. [2 ]
Lenz, Elizabeth A. [2 ,4 ]
Matsuda, Shayle B. [2 ]
Hancock, Joshua R. [2 ]
Innis, Teegan [1 ]
Drury, Crawford [2 ]
Putnam, Hollie M. [3 ]
Gates, Ruth D. [2 ]
机构
[1] Univ Penn, Dept Biol, Philadelphia, PA 19104 USA
[2] Univ Hawaii Manoa, Hawaii Inst Marine Biol, Manoa, HI 96744 USA
[3] Univ Rhode Isl, Dept Biol Sci, Kingston, RI 02881 USA
[4] Univ Hawaii Manoa, Sea Grant Coll Program, Manoa, HI 96822 USA
关键词
climate change; coral bleaching; ocean warming; adaptive management; restoration; MUSTARD HILL CORAL; OCEAN ACIDIFICATION; BUILDING CORALS; HEAT TOLERANCE; CLIMATE-CHANGE; RESILIENCE; RECOVERY; FITNESS; TRENDS; IMPACT;
D O I
10.1073/pnas.2025435118
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Urgent action is needed to prevent the demise of coral reefs as the climate crisis leads to an increasingly warmer and more acidic ocean. Propagating climate change-resistant corals to restore degraded reefs is one promising strategy; however, empirical evidence is needed to determine whether stress resistance is affected by transplantation beyond a coral's native reef. Here, we assessed the performance of bleaching-resistant individuals of two coral species following reciprocal transplantation between reefs with distinct pH, salinity, dissolved oxygen, sedimentation, and flow dynamics to determine whether heat stress response is altered following coral exposure to novel physicochemical conditions in situ. Critically, transplantation had no influence on coral heat stress responses, indicating that this trait was relatively fixed. In contrast, growth was highly plastic, and native performance was not predictive of performance in the novel environment. Coral metabolic rates and overall fitness were higher at the reef with higher flow, salinity, sedimentation, and diel fluctuations of pH and dissolved oxygen, and did not differ between native and cross-transplanted corals, indicating acclimatization via plasticity within just 3 mo. Conversely, crosstransplants at the second reef had higher fitness than native corals, thus increasing the fitness potential of the recipient population. This experiment was conducted during a nonbleaching year, so the potential benefits to recipient population fitness are likely enhanced during bleaching years. In summary, this study demonstrates that outplanting bleaching-resistant corals is a promising tool for elevating the resistance of coral populations to ocean warming.
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页数:8
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