AH44A:
Nutrient-Enhanced Coastal Acidification and Hypoxia and Other Anthropogenic Impacts on Biogeochemical Processes V Posters
AH44A:
Nutrient-Enhanced Coastal Acidification and Hypoxia and Other Anthropogenic Impacts on Biogeochemical Processes V Posters
Nutrient-Enhanced Coastal Acidification and Hypoxia and Other Anthropogenic Impacts on Biogeochemical Processes V Posters
Session ID#: 9379
Session Description:
Excessive nutrients often cause hypoxia through enhanced phytoplankton production of organic matter that is exported to the bottom and consumed by microbial respiration. The released CO2 during respiration further reduces the pH of already acidified water due to atmospheric CO2 in a way that is more than additive. This is a concern due to the deleterious effects of low pH and O2 on marine life. Yet, factors regulating coastal acidification are not fully understood due to the complexity of coastal systems. One complication is caused by benthic respiration which reduces O2 and pH, but also generates alkalinity, which buffers against rapid changes in pH. The oxidation of reduced species could also reduce pH near the oxic-anoxic boundary. These and other biogeochemical processes, along with stratification and end-member mixing influence the occurrence and location of ecologically relevant combinations of low pH and O2. However, the uncertainties around these processes make the effectiveness of management efforts aimed at nutrient reductions to reduce coastal acidification difficult to predict. This session invites presentations describing observations and models that further understanding of and improve our ability to predict how nutrients and other anthropogenic impacts contribute to coastal acidification and hypoxia and ecosystem changes.
Primary Chair: John C Lehrter, US EPA, Gulf Breeze, FL, United States
Chairs: Wei-Jun Cai, University of Delaware, School of Marine Science and Policy, Newark, DE, United States, Jason S Grear, US EPA, Narragansett, RI, United States, Cheryl Ann Brown, US EPA, Newport, OR, United States, Richard B Rivkin, Memorial University of Newfoundland, St John's, NL, Canada, M Robin Anderson, Fisheries and Oceans Canada, Tt. John's, NF, Canada, Louis Legendre, Université Pierre et Marie Curie, Paris, France and Nianzhi Jiao, Xiamen University, Institute of marine microbes and ecosphere, Xiamen, China
Moderators: M Robin Anderson, Fisheries and Oceans Canada, Environmental Science Division, St. John's, NF, Canada, Jason Grear, US EPA, Narragansett, RI, United States, Wei-Jun Cai, University of Delaware, Newark, DE, United States and Nianzhi Jiao, Xiamen University, Institute of marine microbes and ecosphere, Xiamen, China
Student Paper Review Liaisons: John Lehrter, US EPA, Gulf Breeze, FL, United States and Louis Legendre, Université Pierre et Marie Curie, Paris, France
Index Terms:
4273 Physical and biogeochemical interactions [OCEANOGRAPHY: GENERAL]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4834 Hypoxic environments [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Co-Sponsor(s):
- HI - Human Use and Impacts
Abstracts Submitted to this Session:
Understanding the Relative Influence of Anthropogenic Versus Natural Nitrogen on Biogeochemical Processes in the Southern California Bight (92998)
Sources of Nutrients to Nearshore Areas of a Eutrophic Estuary: Implications for Nutrient-Enhanced Acidification in Puget Sound (89092)
Integrated Model of Ocean Acidification and Hypoxia to Support Ecosystem Prediction and Environmental Management in the California Current Ecosystem (93859)
The Role of Ocean Acidification on Estuarine Phytoplankton Growth and Organic Contaminant Uptake (91420)
Flushing Time Estimates for Estuarine Sub-Regions using Numerical Circulation and Box Models (91593)
Contributions to Hypoxia Development in Mississippi Bight Waters as Revealed by Tracer Distributions During a 4-year Time Series (87373)
Physical and Biogeochemical Characteristics of Hypoxia in the Jinhae Bay, South Korea (89417)
Potential changes over a warmer climate in the Benguela Upwelling System within an Oxygen Minimum Zone (93923)
Mechanisms Controlling Hypoxia Data Atlas: High-resolution hydrographic and chemical observations from 2003-2014 (90058)
High pCO2 conditions in San Francisco Bay originate from coastal upwelling from the California Undercurrent (90738)
Spatial and Temporal Distributions of Carbonate Saturation State on the Mississippi River Dominated Northern Gulf of Mexico (91476)
The Effect of Elevated CO2 and Temperature on the Hatch Rate and Survival of Estuarine Forage Fish (93423)
Anthropogenic and climatic controls on carbon and nitrogen exports from Mississippi river basin to Gulf of Mexico during 1800 – 2100: Implications for hypoxia and ocean acidification (93513)
See more of: Ocean Change: Acidification and Hypoxia