Mechanisms of reef coral resistance to future climate change.
Reef corals are highly sensitive to heat, yet populations resistant to climate change have recently been identified. To determine the mechanisms of temperature tolerance, we reciprocally transplanted corals between reef sites experiencing distinct temperature regimes and tested subsequent physiological and gene expression profiles. Local acclimatization and fixed effects, such as adaptation, contributed about equally to heat tolerance and are reflected in patterns of gene expression. In less than 2 years, acclimatization achieves the same heat tolerance that we would expect from strong natural selection over many generations for these long-lived organisms. Our results show both short-term acclimatory and longer-term adaptive acquisition of climate resistance. Adding these adaptive abilities to ecosystem models is likely to slow predictions of demise for coral reef ecosystems.
Department of Biology, Stanford University, Hopkins Marine Station, Pacific Grove, CA 93950, USA. spalumbi@stanford.edu.
Stephen R
SR
Palumbi
Department of Biology, Stanford University, Hopkins Marine Station, Pacific Grove, CA 93950, USA.
Daniel J
DJ
Barshis
Department of Biology, Stanford University, Hopkins Marine Station, Pacific Grove, CA 93950, USA.
Nikki
N
Traylor-Knowles
Department of Biology, Stanford University, Hopkins Marine Station, Pacific Grove, CA 93950, USA.
Rachael A
RA
Bay
D000064:Acclimatization / Q000235:genetics / Q000502:physiology*; D000818:Animals; D037421:Anthozoa / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D002734:Chlorophyll / Q000378:metabolism; D057231:Climate Change; D057894:Coral Reefs; D005786:Gene Expression Regulation; D018869:Heat-Shock Response; D006358:Hot Temperature
D002734:Chlorophyll