In:
Frontiers in Marine Science, Frontiers Media SA, Vol. 8 ( 2021-5-13)
Abstract:
Coral reefs at the northern extent of Florida’s coral reef tract are exposed to many localized anthropogenic influences including controlled freshwater discharges, runoff, upwelling, and seasonal environmental variability. To better understand coral responses to sublethal stressors in nearshore environments, we conducted complementary experiments to assess the impacts of estuarine runoff and temperature stress on local populations of the scleractinian coral species, Montastraea cavernosa , using Tag-Seq global gene expression profiling. In an in situ time series experiment, fate-tracked colonies were sampled during periods of relatively low and high estuarine discharge over 4 years to investigate temporal trends in transcriptional patterns and to identify if coral stress indicators were regulated through time. There was significant transcriptomic variation through time, but patterns did not appear to be attributed to distance from nearby estuarine tidal flux. In an ex situ factorial experiment, clonal replicates of coral genotypes were exposed to temperature (25°C and 30°C) and water (offshore and estuarine discharge, representing typical oceanic conditions and episodic discharge conditions, respectively) treatments to quantify the potential individual and synergistic effects of sublethal stress on coral and algal gene expression. Comparative analyses suggested that corals and their algal symbionts were more responsive to thermal stress than to estuarine discharge, although there was evidence of a synergistic relationship between the two stressors. Strong genotype effects also demonstrated that transcriptomic responses to thermal stress were largely based on coral genotype, indicating the potential for stress resilience among certain members of coral populations from southeast Florida.
Type of Medium:
Online Resource
ISSN:
2296-7745
DOI:
10.3389/fmars.2021.662220
DOI:
10.3389/fmars.2021.662220.s001
DOI:
10.3389/fmars.2021.662220.s002
DOI:
10.3389/fmars.2021.662220.s003
DOI:
10.3389/fmars.2021.662220.s004
DOI:
10.3389/fmars.2021.662220.s005
DOI:
10.3389/fmars.2021.662220.s006
DOI:
10.3389/fmars.2021.662220.s007
DOI:
10.3389/fmars.2021.662220.s008
DOI:
10.3389/fmars.2021.662220.s009
DOI:
10.3389/fmars.2021.662220.s010
DOI:
10.3389/fmars.2021.662220.s011
DOI:
10.3389/fmars.2021.662220.s012
Language:
Unknown
Publisher:
Frontiers Media SA
Publication Date:
2021
detail.hit.zdb_id:
2757748-X
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