1Department of Ecology, Evolution and Marine Biology, University of California Santa Barbara, Santa Barbara, CA 93106-9620, USA
2Department of Biological Sciences, California State University East Bay, Hayward, CA 94542, USA
3Marine Science Institute, University of California Santa Barbara, Santa Barbara, CA 93106-6150, USA
4Department of Geography, University of California Santa Barbara, Santa Barbara, CA 93106-4060, USA
5Department of Zoology, Oregon State University, Corvallis, OR 97331-2914, USA
6Department of Oceanography, University of Hawaii at Manoa, Honolulu, HI 96822, USA
7Bodega Marine Laboratory, University of California Davis, Bodega Bay, CA 94923, USA
8Department of Evolution and Ecology, University of California Davis, Davis, CA 95616, USA
9Department of Geology, University of California Davis, Davis, CA 95616, USA
10Department of Earth and Oceanographic Sciences, Bowdoin College, Brunswick, ME 04011, USA
*current address: Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA
Received: 31 Mar 2013 – Discussion started: 16 Jul 2013
Abstract. The California Current Large Marine Ecosystem (CCLME), a temperate marine region dominated by episodic upwelling, is predicted to experience rapid environmental change in the future due to ocean acidification. The aragonite saturation state within the California Current System is predicted to decrease in the future with near-permanent undersaturation conditions expected by the year 2050. Thus, the CCLME is a critical region to study due to the rapid rate of environmental change that resident organisms will experience and because of the economic and societal value of this coastal region. Recent efforts by a research consortium – the Ocean Margin Ecosystems Group for Acidification Studies (OMEGAS) – has begun to characterize a portion of the CCLME; both describing the spatial mosaic of pH in coastal waters and examining the responses of key calcification-dependent benthic marine organisms to natural variation in pH and to changes in carbonate chemistry that are expected in the coming decades. In this review, we present the OMEGAS strategy of co-locating sensors and oceanographic observations with biological studies on benthic marine invertebrates, specifically measurements of functional traits such as calcification-related processes and genetic variation in populations that are locally adapted to conditions in a particular region of the coast. Highlighted in this contribution are (1) the OMEGAS sensor network that spans the west coast of the US from central Oregon to southern California, (2) initial findings of the carbonate chemistry amongst the OMEGAS study sites, and (3) an overview of the biological data that describes the acclimatization and the adaptation capacity of key benthic marine invertebrates within the CCLME.
Revised: 18 Dec 2013 – Accepted: 30 Dec 2013 – Published: 24 Feb 2014
Hofmann, G. E., Evans, T. G., Kelly, M. W., Padilla-Gamiño, J. L., Blanchette, C. A., Washburn, L., Chan, F., McManus, M. A., Menge, B. A., Gaylord, B., Hill, T. M., Sanford, E., LaVigne, M., Rose, J. M., Kapsenberg, L., and Dutton, J. M.: Exploring local adaptation and the ocean acidification seascape – studies in the California Current Large Marine Ecosystem, Biogeosciences, 11, 1053-1064, doi:10.5194/bg-11-1053-2014, 2014.