Positive interactions between corals and damselfish increase coral resistance to temperature stress

© 2022 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 29(2023), 2 vom: 22. Jan., Seite 417-431
1. Verfasser: Shantz, Andrew A (VerfasserIn)
Weitere Verfasser: Ladd, Mark C, Ezzat, Leila, Schmitt, Russell J, Holbrook, Sally J, Schmeltzer, Emily, Vega Thurber, Rebecca, Burkepile, Deron E
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article coral bleaching facilitation fish-derived nutrients global change mutualisms nutrients positive interactions stress-gradient hypothesis symbiosis
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520 |a By the century's end, many tropical seas will reach temperatures exceeding most coral species' thermal tolerance on an annual basis. The persistence of corals in these regions will, therefore, depend on their abilities to tolerate recurrent thermal stress. Although ecologists have long recognized that positive interspecific interactions can ameliorate environmental stress to expand the realized niche of plants and animals, coral bleaching studies have largely overlooked how interactions with community members outside of the coral holobiont shape the bleaching response. Here, we subjected a common coral, Pocillopora grandis, to 10 days of thermal stress in aquaria with and without the damselfish Dascyllus flavicaudus (yellowtail dascyllus), which commonly shelter within these corals, to examine how interactions with damselfish impacted coral thermal tolerance. Corals often benefit from nutrients excreted by animals they interact with and prior to thermal stress, corals grown with damselfish showed improved photophysiology (Fv /Fm ) and developed larger endosymbiont populations. When exposed to thermal stress, corals with fish performed as well as control corals maintained at ambient temperatures without fish. In contrast, corals exposed to thermal stress without fish experienced photophysiological impairment, a more than 50% decline in endosymbiont density, and a 36% decrease in tissue protein content. At the end of the experiment, thermal stress caused average calcification rates to decrease by over 80% when damselfish were absent but increase nearly 25% when damselfish were present. Our study indicates that damselfish-derived nutrients can increase coral thermal tolerance and are consistent with the Stress Gradient Hypothesis, which predicts that positive interactions become increasingly important for structuring communities as environmental stress increases. Because warming of just a few degrees can exceed corals' temperature tolerance to trigger bleaching and mortality, positive interactions could play a critical role in maintaining some coral species in warming regions until climate change is aggressively addressed 
650 4 |a Journal Article 
650 4 |a coral bleaching 
650 4 |a facilitation 
650 4 |a fish-derived nutrients 
650 4 |a global change 
650 4 |a mutualisms 
650 4 |a nutrients 
650 4 |a positive interactions 
650 4 |a stress-gradient hypothesis 
650 4 |a symbiosis 
700 1 |a Ladd, Mark C  |e verfasserin  |4 aut 
700 1 |a Ezzat, Leila  |e verfasserin  |4 aut 
700 1 |a Schmitt, Russell J  |e verfasserin  |4 aut 
700 1 |a Holbrook, Sally J  |e verfasserin  |4 aut 
700 1 |a Schmeltzer, Emily  |e verfasserin  |4 aut 
700 1 |a Vega Thurber, Rebecca  |e verfasserin  |4 aut 
700 1 |a Burkepile, Deron E  |e verfasserin  |4 aut 
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773 1 8 |g volume:29  |g year:2023  |g number:2  |g day:22  |g month:01  |g pages:417-431 
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