The impact of oyster aquaculture on the estuarine carbonate system

  • Posted on: Thu, 07/14/2022 - 13:29
  • By: kcanesi

Abstract: Many studies have examined the vulnerability of calcifying organisms, such as the eastern oyster (Crassostrea virginica), to externally forced ocean acidification, but the opposite interaction whereby oysters alter their local carbonate conditions has received far less attention. We present an exploratory model for isolating the impact that net calcification and ...

Controls on buffering and coastal acidification in a temperate estuary

  • Posted on: Thu, 07/14/2022 - 13:18
  • By: kcanesi

Abstract: Estuaries may be uniquely susceptible to the combined acidification pressures of atmospherically driven ocean acidification (OA), biologically driven CO2 inputs from the estuary itself, and terrestrially derived freshwater inputs. This study utilized continuous measurements of total alkalinity (TA) and the partial pressure of carbon dioxide (pCO2) from the mouth of ...

EPA Guidelines for Measuring Changes in Seawater pH and Associated Carbonate Chemistry in Coastal Environments of the Eastern United States

  • Posted on: Thu, 05/17/2018 - 15:46
  • By: kcanesi

These guidelines are written for a variety of audiences ranging from shellfish growers interested in monitoring pH with inexpensive equipment to citizen monitoring groups to advanced chemistry laboratories interested in expanding existing capabilities. The purpose is to give an overview of available sampling, analytical and data reporting approaches that will ...

Coral reefs will transition to net dissolving before end of century

  • Posted on: Mon, 02/26/2018 - 09:15
  • By: kcanesi

Ocean acidification refers to the lowering of the ocean’s pH due to the uptake of anthropogenic CO2 from the atmosphere. Coral reef calcification is expected to decrease as the oceans become more acidic. Dissolving calcium carbonate (CaCO3) sands could greatly exacerbate reef loss associated with reduced calcification but is presently poorly ...

Continental shelves as a variable but increasing global sink for atmospheric carbon dioxide

  • Posted on: Thu, 02/01/2018 - 12:24
  • By: kcanesi

It has been speculated that the partial pressure of carbon dioxide (pCO2) in shelf waters may lag the rise in atmospheric CO2. Here, we show that this is the case across many shelf regions, implying a tendency for enhanced shelf uptake of atmospheric CO2. This result is based on analysis ...

The combined effects of acidification and hypoxia on pH and aragonite saturation in the coastal waters of the California current ecosystem and the northern Gulf of Mexico

  • Posted on: Tue, 01/02/2018 - 12:31
  • By: kcanesi

Inorganic carbon chemistry data from the surface and subsurface waters of the West Coast of North America have been compared with similar data from the northern Gulf of Mexico to demonstrate how future changes in CO2 emissions will affect chemical changes in coastal waters affected by respiration-induced hypoxia ([O2] ≤ ~ 60 µmol kg−1). ...

Ocean acidification decreases mussel byssal attachment strength and induces molecular byssal responses

  • Posted on: Wed, 02/22/2017 - 14:41
  • By: jackie

Mussels are an ecologically and economically important taxon that attach to solid surfaces via the byssus. To date, little is known about the effects of ocean acidification (OA) on mussel byssal attachment and the underlying molecular byssal responses. This study demonstrated that after 1 week of exposure to acidified seawater, ...

Pages