Proposed Abstract Title

Nearshore Carbonate Chemistry at Shellfish Aquaculture Sites in the Northern Salish Sea

Type of Presentation

Oral

Session Title

Ocean Acidification in the Salish Sea

Location

2016SSEC

Description

Key Words: Salish Sea, shell fish aquaculture, carbonate chemistry, pH, aragonite saturation, shore-based.

The majority of carbonate chemistry and ocean acidification research in Canada to date has been focused on the open ocean and there has been relatively little study of nearshore sites. Carbonate chemistry controls the aragonite saturation state, which negatively affects shellfish if values are low, especially at the larval stage. As shellfish aquaculture takes place in nearshore areas, the risk of acidification to the industry is largely unknown. We therefore aim to characterise the carbonate chemistry of three nearshore regions in the Salish Sea, including the highly productive Baynes Sound, where the majority of shellfish aquaculture in BC occurs. Initial samples have been obtained from regions with moderate shellfish production. We took bottle samples from various locations and depths and measured dissolved inorganic carbon, dissolved oxygen, total alkalinity, temperature, salinity and nutrient concentration. We aim to demonstrate the diurnal and seasonal variation and patterns of pH, pCO2 and the aragonite saturation state at shore-based sites and put these data in the context of water properties determined from ship board measurements in the open Strait of Georgia.

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Nearshore Carbonate Chemistry at Shellfish Aquaculture Sites in the Northern Salish Sea

2016SSEC

Key Words: Salish Sea, shell fish aquaculture, carbonate chemistry, pH, aragonite saturation, shore-based.

The majority of carbonate chemistry and ocean acidification research in Canada to date has been focused on the open ocean and there has been relatively little study of nearshore sites. Carbonate chemistry controls the aragonite saturation state, which negatively affects shellfish if values are low, especially at the larval stage. As shellfish aquaculture takes place in nearshore areas, the risk of acidification to the industry is largely unknown. We therefore aim to characterise the carbonate chemistry of three nearshore regions in the Salish Sea, including the highly productive Baynes Sound, where the majority of shellfish aquaculture in BC occurs. Initial samples have been obtained from regions with moderate shellfish production. We took bottle samples from various locations and depths and measured dissolved inorganic carbon, dissolved oxygen, total alkalinity, temperature, salinity and nutrient concentration. We aim to demonstrate the diurnal and seasonal variation and patterns of pH, pCO2 and the aragonite saturation state at shore-based sites and put these data in the context of water properties determined from ship board measurements in the open Strait of Georgia.