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Seawater carbonate chemistry and metabolism and growth of epilithic and endolithic coral-reef turf algal

Turf algal assemblages are ubiquitous primary producers on coral reefs, but little is known about the response of this diverse group to ocean acidification (OA) across different temperatures. We tested the hypothesis that CO2 influences the functional response of epilithic and endolithic turf assemblages to increasing temperature. Replicate carbonate plugs covered by turf were collected from the reef and exposed to ambient and high pCO2 (1000 µatm) conditions for 3 weeks. Each pCO2 treatment was replicated across six temperatures (24.0-31.5 °C) that spanned the full seasonal temperature range on a fringing reef in Moorea, French Polynesia, and included one warming treatment (3 °C above daily average temperatures). Temperature and CO2 enrichment had complex, and sometimes interactive, effects on turf metabolism and growth. Photosynthetic and respiration rates were enhanced by increasing temperature, with an interactive effect of CO2 enrichment. Photosynthetic rates were amplified by high CO2 in the warmest temperatures, while the increase in respiration rates with temperature were enhanced under ambient CO2. Epilithic turf growth rates were not affected by temperature, but increased in response to CO2 enrichment. We found that CO2 and temperature interactively affected the endolithic assemblage, with the highest growth rates under CO2 enrichment, but only at the warmest temperatures. These results demonstrate how OA may influence algal physiology and growth across a range of ecologically relevant temperatures, and indicate that the effects of CO2 enrichment on coral-reef turf assemblages can be temperature dependent. The complex effects of CO2 enrichment and temperature across a suite of algal responses illustrates the importance of incorporating multiple stressors into global change experiments.

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Johnson, Maggie Dorothy, Comeau, Steeve, Lantz, Coulson A, Smith, Jennifer E (2017). Dataset: Seawater carbonate chemistry and metabolism and growth of epilithic and endolithic coral-reef turf algal. https://doi.org/10.1594/PANGAEA.888396

DOI retrieved: 2017

Additional Info

Field Value
Imported on November 29, 2024
Last update November 29, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.888396
Author Johnson, Maggie Dorothy
Given Name Maggie Dorothy
Family Name Johnson
More Authors
Comeau, Steeve
Lantz, Coulson A
Smith, Jennifer E
Source Creation 2017
Publication Year 2017
Resource Type text/tab-separated-values - filename: Johnson-etal_2017_CR
Subject Areas
Name: Biosphere

Name: Chemistry

Name: Oceans

Related Identifiers
Title: Complex and interactive effects of ocean acidification and temperature on epilithic and endolithic coral-reef turf algal assemblages
Identifier: https://doi.org/10.1007/s00338-017-1597-2
Type: DOI
Relation: IsSupplementTo
Year: 2017
Source: Coral Reefs
Authors: Johnson Maggie Dorothy , Comeau Steeve , Lantz Coulson A , Smith Jennifer E .

Title: seacarb: seawater carbonate chemistry with R. R package version 3.1
Identifier: https://cran.r-project.org/package=seacarb
Type: DOI
Relation: References
Year: 2016
Authors: Gattuso Jean-Pierre , Epitalon Jean-Marie , Lavigne Héloïse , Orr James C , Gentili Bernard , Proye Aurélien , Soetaert Karline , Rae James .