A New Foraminiferal Bioindicator for Long-Term Heat Stress on Coral Reefs  

作　　者：Alexander F.Humphreys Sam J.Purkis Chuyan Wan Matthew Aldrich Sarah Nichols Jazmin Garza 

机构地区：[1]Rosenstiel School of Marine and Atmospheric Science,Department of Marine Geosciences,University of Miami,Miami,FL,33149,USA [2]Khaled bin Sultan Living Oceans Foundation,Annapolis,MD,21403,USA [3]Department of Earth and Planetary Sciences,Northwestern University,Evanston,IL,60208,USA

出　　处：《Journal of Earth Science》2022年第6期1451-1459,共9页地球科学学刊（英文版）

基　　金：supported by the National Science Foundation(NSF)(No.EAR-2035135)。

摘　　要：Coral reefs are in terminal decline.For conservation to be effective,naturally depauperate 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 bioindicators 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 foraminiferal bioindicators that inform on temperature stress over meaningful timescales.This study focuses 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 salinity,both recognized environmental influences on foraminifera,are shown to be subordinate to temperature in their sway of this ecological patterning.These findings indicate the potential for using foraminifera to develop new indices capable of quantifying long-term thermal impacts on reefs.

关 键 词：FORAMINIFERA BIOINDICATOR corals BLEACHING degree heating week FoRAM Index 

分 类 号：Q958.8[生物学—动物学]