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Ocean warming and acidification pose synergistic limits to the thermal niche of an economically important echinoderm
- Publication Year :
- 2019
- Publisher :
- Elsevier Science, 2019.
-
Abstract
- To make robust projectios of the impacts of climate change, it is critical to understand how abiotic factors may interact to constrain the distribution and productivity of marine flora and fauna. We evaluated the effects of projected end of the century ocean acidification (OA) and warming (OW) on the thermal tolerance of an important living marine resource, the sea urchin Loxechinus albus, a benthic shallow water coastal herbivore inhabiting part of the Pacific coast of South America. After exposing young juveniles for a 1-month period to contrasting pCO2 (~500 and 1400 μatm) and temperature (~15 °C and 20 °C) levels, critical thermal maximum (CTmax) and minimum (CTmin) as well as thermal tolerance polygons were assessed based on self-righting success as an end point. Transcription of heat shock protein 70 (HSP70), a chaperone protecting cellular proteins from environmental stress, was also measured. Exposure to elevated pCO2 significantly reduced thermal tolerance by increasing CTmin at both experimental temperatures and decreasing CTmax at 20 °C. There was also a strong synergistic effect of OA × OW on HSP70 transcription levels which were 75 times higher than in control conditions. If this species is unable to adapt to elevated pCO2 in the future, the reduction in thermal tolerance and HSP response suggests that near-future warming and OA will disrupt their performance and reduce their distribution with ecological and economic consequences. Given the wider latitudinal range (6 to 56°S) and environmental tolerance of L. albus compared to other members of this region's benthic invertebrate community, OW and OA may cause substantial changes to the coastal fauna along this geographical range. Fil: Manriquez Carrillo, Patricio Hector Rafael. Centro de Estudios Avanzados En Zonas Áridas; Chile. Laboratorio de Ecología y Conducta de la Ontogenia Tem; Chile Fil: González, Claudio P.. Centro de Estudios Avanzados En Zonas Áridas; Chile. Laboratorio de Ecología y Conducta de la Ontogenia Tem; Chile Fil: Brokordt, Katherina. Universidad Catolica del Norte; Chile Fil: Pereira, Luis. Universidad Católica del Norte; Chile Fil: Torres, Rodrigo. Centro de Investigacion En Ecosistemas de la Patagonia; Chile Fil: Lattuca, María Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Fernandez, Daniel Alfredo. Universidad Nacional de Tierra del Fuego. Instituto de Ciencias Polares, Recursos Naturales y Ambiente; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Alter, Katharina. Universitat Hamburg; Alemania Fil: Peck, Myron. Universitat Hamburg; Alemania Fil: Cucco, Andrea. Universitat Hamburg; Alemania Fil: Antognarelli, Fabio. Universitat Hamburg; Alemania Fil: Marras, Stefano. Universitat Hamburg; Alemania Fil: Domenici, Paolo. Universitat Hamburg; Alemania
- Subjects :
- SELF RIGHTING
Environmental Engineering
010504 meteorology & atmospheric sciences
Climate Change
Oceans and Seas
Effects of global warming on oceans
Climate change
010501 environmental sciences
01 natural sciences
Ciencias Biológicas
Stress, Physiological
GLOBAL CLIMATE CHANGE
Animals
Environmental Chemistry
Seawater
Critical thermal maximum
Loxechinus albus
Waste Management and Disposal
CRITICAL THERMAL MINIMUM
HSP70
0105 earth and related environmental sciences
Abiotic component
biology
Ecology
Global warming
Temperature
Ocean acidification
CRITICAL THERMAL MAXIMUM
LOXECHINUS ALBUS
Hydrogen-Ion Concentration
South America
Biología Marina, Limnología
biology.organism_classification
Invertebrates
Pollution
Benthic zone
Sea Urchins
Environmental science
THERMAL TOLERANCE
CIENCIAS NATURALES Y EXACTAS
Environmental Monitoring
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....8eb7dec4ac0e6cb72547b2e3e2461836