Coral reefs are in terminal decline. For conservation to be effective, naturally depauper-ate reefs must be distinguished from those recently degraded by humans. Traditional reef monitoring is time consuming and lacks the longevity to make this distinction. Success in using foraminifera as bioin-dicators for reef health has hitherto levered their response to nutrients. Because ocean heat waves are the dominant driver of coral bleaching and death, there is compelling motivation to develop new fora-miniferal bioindicators that inform on temperature stress over meaningful timescales. This study focus-es on identifying which foraminifera respond systematically to the temperature stress that kills corals. Statistical models were used to compare endosymbiont-bearing foraminiferal families, collected along a heat-stress gradient spanning the Solomon Islands and New Caledonia, to live coral cover at the same sites. Results indicate that Amphisteginidae foraminifera and coral cover show a significant decline in abundance as heat stress increases along the transect sites. Furthermore, ocean productivity and salini-ty, both recognized environmental influences on foraminifera, are shown to be subordinate to tempera-ture in their sway of this ecological patterning. These findings indicate the potential for using foramin-ifera to develop new indices capable of quantifying long-term thermal impacts on reefs.

Alexander F.Humphreys;Sam J.Purkis;Chuyan Wan;Matthew Aldrich;Sarah Nichols;Jazmin Garza

Rosenstiel School of Marine and Atmospheric Science,Department of Marine Geosciences,University of Miami,Miami FL 33149,USA;Khaled bin Sultan Living Oceans Foundation,Annapolis MD 21403,USA;Department of Earth and Planetary Sciences,Northwestern University,Evanston IL 60208,USA

地球科学学刊（英文版）

[1]Alexander F.Humphreys;Sam J.Purkis;Chuyan Wan;Matthew Aldrich;Sarah Nichols;Jazmin Garza-.A New Foraminiferal Bioindicator for Long-Term Heat Stress on Coral Reefs)[J].地球科学学刊（英文版）,2022(06):1451-1459

Foraminiferal,Bioindicator,Reefs,depauper,levered,miniferal,Amphisteginidae,salini,foramin,ifera

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