The ecology of ocean acidification : integrating the effects of pH variation among other environmental stressors on biogeography and organismal performance in rocky intertidal communities

• Main Author: Rose, Jeremy M.
• Other Authors: Menge, Bruce A., Grorud-Colvert, Kirsten, Lubchenco, Jane, Gouhier, Tarik C., Letelier, Ricardo, Integrative Biology, Oregon State University. Graduate School
• Format: Doctoral or Postdoctoral Thesis
• Language: English; unknown
• Published: Oregon State University
• Subjects: Intertidal ecology > Pacific Coast (U.S.); Intertidal animals > Effect of water acidification on > Pacific Coast (U.S.); Biogeography > Climatic factors > Pacific Coast (U.S.); Ocean acidification > Pacific Coast (U.S.); Strongylocentrotus purpuratus > Effect of water acidification on > Pacific Coast (U.S.); Strongylocentrotus purpuratus > Climatic factors > Pacific Coast (U.S.); Intertidal animals > Climatic factors > Pacific Coast (U.S.); California mussel > Climatic factors > Pacific Coast (U.S.); California mussel > Effect of water acidification on > Pacific Coast (U.S.); Ocean acidification
• Online Access: https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/ww72bg13c

Ocean Acidification (OA) has emerged as a major threat to marine ecosystems, particularly regarding calcifying organisms. A growing body of literature describing laboratory investigations into pH stress indicates broadly deleterious effects for calcifiers, but responses vary greatly across taxa and can be influenced by variations in other environmental characteristics. Scaling laboratory results to ecological performance is critical for understanding the impacts of OA on marine communities. One method that can be useful for elucidating these ecological impacts is to study organisms and communities in environments that naturally vary in pH. The California Current Large Marine Ecosystem (CCLME) is one such ecosystem in which pH varies both in space and over time, bathing intertidal communities in a mosaic of pH conditions. The dynamics of the CCLME during the upwelling season also drive biologically-relevant variation in productivity and temperature. My dissertation leverages variation in oceanographic processes along the CCLME to explore the potential for OA impacts on rocky intertidal community distributions and the performances of two major space occupiers in rocky intertidal communities. In Chapter 2, a series of large scale community surveys along the CCLME were re-examined to ask if distributions of calcifiers and their mineral forms differ whether these differences are linked to environmental conditions. The patterns of differential calcifier abundances that emerge may better inform studies into the potential community impacts of OA by highlighting regions where calcifiers are relatively diverse or replete. Although these patterns are partially driven by complex interactions among temperature, phytoplankton productivity and upwelling, much of the spatial variation in calcifier abundance remains unexplained, suggesting the need to better characterize the pH environment along this oceanographically-complex region. In Chapter 3, I explored the relative influence of the pH mosaic along the CCLME on performance ...