2024
DOI: 10.1101/2024.01.31.575130
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Environmental, host, and symbiont drivers of heat tolerance in a species complex of reef-building corals

MS Naugle,
H Denis,
VJL Mocellin
et al.

Abstract: Reef-building coral populations are under unprecedented threat from climate warming. Yet, variation in coral heat tolerance exists whereby some colonies can cope with higher sea temperatures than others and thus may hold unique value for conservation and restoration. Here, we quantify variation in heat tolerance of an ecologically important tabular coral species complex across the Great Barrier Reef (GBR) while also measuring genomic variation in the coral host and symbiont partners. Coral bleaching and photoc… Show more

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Cited by 2 publications
(2 citation statements)
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“…Importantly, we found that heat-tolerant corals (defined as the top 25 percentile from the GBR ED50 distributions) occurred at nearly every reef, including the cooler southern GBR. These results align with previous results on A. cervicornis in the Florida Keys 56 , A. hyacinthus in Palau 51 and A. hyacinthus in the GBR 77 . Within-reef variation remained mostly unexplained by colony-level predictors (depth and pigmentation) and could be elucidated by incorporating genomic data not yet available here.…”
Section: Standing Within-reef Variation In Heat Tolerance Supports Ad...supporting
confidence: 92%
See 1 more Smart Citation
“…Importantly, we found that heat-tolerant corals (defined as the top 25 percentile from the GBR ED50 distributions) occurred at nearly every reef, including the cooler southern GBR. These results align with previous results on A. cervicornis in the Florida Keys 56 , A. hyacinthus in Palau 51 and A. hyacinthus in the GBR 77 . Within-reef variation remained mostly unexplained by colony-level predictors (depth and pigmentation) and could be elucidated by incorporating genomic data not yet available here.…”
Section: Standing Within-reef Variation In Heat Tolerance Supports Ad...supporting
confidence: 92%
“…Conversely, we found no correlation between ED50s of F v /F m and NDVI traits. The only two other studies using F v /F m and chlorophyll-related ED50 thresholds found congruent reef-level variation between the two traits for some species (e.g., Pocillopora verrucosa 48 and Acropora hyacinthus 77 ) but not others (e.g., Porites lobata 48 ). In both studies, visual chlorophyll scores showed higher noise and lower differences in reef ED50s which aligns with A. spathulata pairwise reef differences in NDVI ED50s (0.39 °C) being almost half that of F v /F m ED50 (0.67 °C).…”
Section: Divergent Effects Of Acute Heat Stress On Thermal Tolerance ...mentioning
confidence: 88%