Impact of CO2-induced seawater acidification on the burrowing activity of Nereis virens and sediment nutrient flux

  • Posted on: Wed, 03/30/2016 - 14:25
  • By: petert

A mesocosm experiment was conducted to quantify the effects of medium term (5 wk) exposure to acidified seawater on the structure of Nereis virens (Polychaeta) burrows and sediment nutrient fluxes. Worms were exposed to seawater acidified to a pH of 7.3, 6.5 or 5.6 using carbon dioxide (CO2) gas. These treatments mimicked ...

Impacts of ocean acidification on marine organisms: quantifying sensitivities and interaction with warming

  • Posted on: Tue, 03/29/2016 - 18:06
  • By: petert

Ocean acidification represents a threat to marine species worldwide, and forecasting the ecological impacts of acidification is a high priority for science, management, and policy. As research on the topic expands at an exponential rate, a comprehensive understanding of the variability in organisms' responses and corresponding levels of certainty is ...

Impacts of ocean acidification on marine fauna and ecosystem processes

  • Posted on: Tue, 03/29/2016 - 16:02
  • By: petert

Oceanic uptake of anthropogenic carbon dioxide (CO2) is altering the seawater chemistry of the world’s oceans with consequences for marine biota. Elevated partial pressure of CO2 (pCO2) is causing the calcium carbonate saturation horizon to shoal in many regions, particularly in high latitudes and regions that intersect with pronounced hypoxic ...

Climate Change Impacts on Marine Ecosystems

  • Posted on: Tue, 03/29/2016 - 15:57
  • By: petert

In marine ecosystems, rising atmospheric CO2 and climate change are associated with concurrent shifts in temperature, circulation, stratification, nutrient input, oxygen content, and ocean acidification, with potentially wide-ranging biological effects. Population-level shifts are occurring because of physiological intolerance to new environments, altered dispersal patterns, and changes in species interactions. Together with ...

Ocean Acidification: The Other CO2 Problem

  • Posted on: Tue, 03/29/2016 - 14:50
  • By: petert

Rising atmospheric carbon dioxide (CO2), primarily from human fossil fuel combustion, reduces ocean pH and causes wholesale shifts in seawater carbonate chemistry. The process of ocean acidification is well documented in field data, and the rate will accelerate over this century unless future CO2 emissions are curbed dramatically. Acidification alters ...

Ocean and coastal acidification off New England and Nova Scotia

  • Posted on: Sun, 02/21/2016 - 15:47
  • By: petert

This Oceanography paper discusses ocean and coastal acidification processes specific to New England coastal and Nova Scotia shelf waters and reviews current understanding of the biological consequences most relevant to the region. It also identifies key research and monitoring needs to be addressed and highlight existing capacities that should be ...

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