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 ...

Declining oxygen in the global ocean and coastal waters

  • Posted on: Mon, 01/08/2018 - 11:42
  • By: kcanesi

BACKGROUND Oxygen concentrations in both the open ocean and coastal waters have been declining since at least the middle of the 20th century. This oxygen loss, or deoxygenation, is one of the most important changes occurring in an ocean increasingly modified by human activities that have raised temperatures, CO2 levels, and nutrient ...

Marine species distribution shifts on the U.S. Northeast Continental Shelf under continued ocean warming

  • Posted on: Tue, 05/09/2017 - 12:30
  • By: jackie

The U.S. Northeast Continental Shelf marine ecosystem has warmed much faster than the global ocean and it is expected that this enhanced warming will continue through this century. Here, we used a high-resolution global climate model and historical observations of species distributions from a trawl survey to examine changes in ...

Lessons from two high CO2 worlds – future oceans and intensive aquaculture

  • Posted on: Fri, 10/28/2016 - 13:40
  • By: jackie

Exponentially rising CO2 (currently ~400 µatm) is driving climate change and causing acidification of both marine and freshwater environments. CO2 directly affects acid–base and ion regulation, respiratory function and aerobic performance in aquatic animals. Elevated CO2 projected for end of this century (e.g. 800–1000 µatm) can also impact physiology, and have substantial ...

Linking Rising pCO2 and Temperature to the Larval Development and Physiology of the American Lobster (Homarus americanus)

  • Posted on: Fri, 10/07/2016 - 10:16
  • By: jackie

Few studies have evaluated the joint effects of elevated temperature and pCO2 on marine organisms. In this study we investigated the interactive effects of Intergovernmental Panel on Clinate Change predicted temperature and pCO2 for the end of the 21st century on key aspects of larval developm,ent of the American lobster, Homarus americanus, an otherwise well-studied, ...

Effects of ocean acidification, temperature and nutrient regimes on the appendicularian Oikopleura dioica: A mesocosm study

  • Posted on: Mon, 06/13/2016 - 05:56
  • By: Anonymous

Appendicularians are free-swimming tunicates that are common in most oceans, coastal waters, and estuaries. They build delicate, gelatinous houses that they use to filter food from the water. This study found that appendicularian abundance increased with ocean acidification, warmer temperatures, and higher nutrient levels. This suggests that appendicularians will play ...

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