This study examines the physiological response of the Atlantic surfclam (Spisula solidissima) to ocean acidification in warm summer temperatures. Working with ambient seawater, this experiment manipulated pH conditions while maintaining natural diel fluctuations and seasonal shifts in temperature. One-year-old surfclams were exposed to one of three pH conditions (ambient (control): 7.8 ± 0.07, medium: 7.51 […] The post Effects of ocean acidification and summer thermal stress on the physiology and growth of the atlantic surfclam (Spisula solidissima) appeared first on Ocean Acidification ..read more

The impacts of ocean acidification on coral reef macroalgal community composition and metabolism have implications for the habitat supporting capacity of future reefs. In this pilot study, we use co-located semi-hourly measurements of total dissolved inorganic carbon (DIC), total alkalinity, and the stable carbon isotope composition of DIC (δ13CDIC) over a 27 + h period from […] The post Geochemical evidence of temporal ecosystem photosynthetic plasticity within a pristine coral atoll appeared first on Ocean Acidification ..read more

Participate in the survey This is a survey tailored by members of the OA Med-Hub steering committee and endorsed by IMBeR on the Climate Intervention Challenge.We would appreciate that you participate in this survey and to also disseminate it/sharing this newsletter within your network, not only with scientists but also with stakeholders, policymakers and all key actors you think […] The post Survey: marine carbon dioxide removal (mCDR) in the Mediterranean region appeared first on Ocean Acidification ..read more

Highlights Abstract There is a concern that harmful algal bloom (HAB) species may increase under climate change. Yet, we lack understanding of how ecological interactions will be affected under ocean warming and acidification (OWA) conditions. We tested the antagonistic effects of three strains of the dinoflagellate HAB species Alexandrium catenella on three target species (the chlorophyte Tetraselmis sp., the […] The post Antagonistic interactions of the dinoflagellate Alexandrium catenella under simultaneous warming and acidification appeared first on Ocean Acid ..read more

Highlights Abstract Transgenerational responses of susceptible calcifying organisms to progressive ocean acidification are an important issue in reducing uncertainty of future predictions. In this study, a two-generation rearing experiment was conducted using mature Mesocentrotus nudus, a major edible sea urchin that occurs along the coasts of northern Japan. Morphological observations and comprehensive gene expression analysis (RNA-seq) […] The post Transgenerational acclimation to acidified seawater and gene expression patterns in a sea urchin appeared first on Ocean Acidification ..read more

Marine organisms are simultaneously exposed to anthropogenic stressors associated with ocean acidification and ocean warming, with expected interactive effects. Species from different trophic levels with dissimilar characteristics and evolutionary histories are likely to respond differently. Here, we perform a meta-analysis of controlled experiments including both ocean acidification and ocean warming factors to investigate single and […] The post Responses of marine trophic levels to the combined effects of ocean acidification and warming appeared first on Ocean Acidification ..read more

Warming, ocean acidification, and deoxygenation are increasingly putting pressure on marine ecosystems. At the same time, thawing permafrost and decomposing hydrates in Arctic shelf seas may release large amounts of methane (CH4) into the water column, which could accelerate local ocean acidification and contribute to climate change. The key parameters to observing and understanding these […] The post Expanding seawater carbon dioxide and methane measuring capabilities with a Seaglider appeared first on Ocean Acidification ..read more

Highlights Abstract Background The increase in anthropogenic CO2 concentrations in the Earth’s atmosphere since the industrial revolution has resulted in an increased uptake of CO2 by the oceans, leading to ocean acidification. Dissolved Inorganic Carbon (DIC) is one of the key variables to characterize the seawater carbonate system. High quality DIC observations at a high spatial-temporal resolution is […] The post Development of an autonomous on-site dissolved inorganic carbon analyzer using conductometric detection appeared first on Ocean Acidification ..read more

Abstract The California Current Ecosystem (CCE) is a natural laboratory for studying the chemical and ecological impacts of ocean acidification. Biogeochemical variability in the region is due primarily to wind-driven near-shore upwelling of cold waters that are rich in re-mineralized carbon and poor in oxygen. The coastal regions are exposed to surface waters with increasing […] The post The combined effects of ocean acidification and respiration on habitat suitability for marine calcifiers along the West coast of North America appeared first on Ocean Acidification ..read more

Aquaculture witnessed a remarkable growth as one of the fastest-expanding sector in the food production industry; however, it faces serious threat from the unavoidable impacts of climate change. Understanding this threat, the present review explores the consequences of climate change on aquaculture production and provides need based strategies for its sustainable management, with a particular […] The post Climate change effects on aquaculture production and its sustainable management through climate-resilient adaptation strategies: a review appeared first on Ocean Acidification ..read more