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Coral Reef Arks: An In Situ Mesocosm and Toolkit for Assembling Reef Communities

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Biotic habitats as refugia under ocean acidification.

Laura J Falkenberg¹, Elliot Scanes^2,3, James Ducker¹

¹Simon F.S. Li Marine Science Laboratory, School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR.

Conservation Physiology

|September 20, 2021

Summary

Habitat-forming organisms like macroalgae and seagrasses can buffer ocean acidification. Effective local management can enhance their role in protecting marine life and ecosystems from climate change impacts.

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Area of Science:

Marine ecology
Climate change science
Ecosystem services

Background:

Increasing atmospheric carbon dioxide (CO2) drives ocean acidification, lowering pH and threatening calcifying organisms.
Habitat-forming species play a crucial role in mitigating environmental stressors, especially in the context of climate change.
Calcifying organisms are integral to marine ecosystems, with their decline posing ecological, economic, and health risks.

Purpose of the Study:

To explore how habitat-forming organisms ameliorate environmental stress, considering current and future climate scenarios.
To investigate how local environmental context influences the stress-mitigation capacity of these organisms.
To assess the potential of habitat formers to buffer against ocean acidification through physiological processes and management interventions.

Main Methods:

Qualitative narrative synthesis framework.
Analysis of macroalgae and seagrass roles in altering carbonate chemistry.
Consideration of adjacent habitats like mangroves and saltmarshes.
Evaluation of context-dependent interactions and management influences.

Main Results:

Macroalgae and seagrasses can modify water carbonate chemistry, benefiting resident organisms.
The capacity of habitat formers to mitigate stress is influenced by local abiotic and biotic factors.
Management strategies can enhance the buffering potential of habitat-forming organisms.

Conclusions:

Habitat-forming organisms offer a natural solution to buffer ocean acidification.
Local management can optimize the protective functions of these habitats.
Effective conservation of habitat formers can create crucial refugia for marine biodiversity and economically important species.