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Case Studies (332)
Patuxent River, USA
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Patuxent River hypoxia was first recorded in the 1930s but there are indications of hypoxia from the 1700s. Rise in anoxia in the 1970s has been linked to nutrient runoff and wet weather. Hypoxia has decreased in the 1990s and 2000s.
Hypoxia has caused mortality of benthos (annual recolonization) and mortality of fish early life stages.
Type of regime shift
Ecosystem type
- Freshwater lakes & rivers
Land uses
- Fisheries
Spatial scale of the case study
- Local/landscape (e.g. lake, catchment, community)
Continent or Ocean
- North America
Region
- West coast of USA
Countries
- United States
Locate with Google Map
Key References
Citation
Johanna Yletyinen.
Patuxent River, USA.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2012-01-12 08:40:33 GMT.
Published in
Case Studies
Choptank River, USA
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Periodic hypoxia occurs in June - September. It was first recorded in the 1980s.
Type of regime shift
Ecosystem type
- Freshwater lakes & rivers
Land uses
- Fisheries
Spatial scale of the case study
- Local/landscape (e.g. lake, catchment, community)
Continent or Ocean
- North America
Region
- East coast of USA
Countries
- United States
Locate with Google Map
Key References
-
Committee on Environment and Natural Resources. 2010. Scientific Assessment of Hypoxia in U.S. Coastal Waters. Interagency Working Group on Harmful Algal Blooms, Hypoxia, and Human Health of the Joint Subcommittee on Ocean Science and Technology. Washington, DC.
Citation
Johanna Yletyinen.
Choptank River, USA.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2013-02-21 14:14:18 GMT.
Published in
Case Studies
Chester River, USA
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Hypoxia occurs in Chester River in June - August. It has caused mortality of benthos and fish mortality and avoidance. Hypoxic areas are annually recolonized by benthos. Dissolved oxygen content has declined in the 1990s and 2000s.
Type of regime shift
Ecosystem type
- Freshwater lakes & rivers
Land uses
- Fisheries
Spatial scale of the case study
- Local/landscape (e.g. lake, catchment, community)
Continent or Ocean
- North America
Region
- East Coast USA
Countries
- United States
Locate with Google Map
Key References
-
Committee on Environment and Natural Resources. 2010. Scientific Assessment of Hypoxia in U.S. Coastal Waters. Interagency Working Group on Harmful Algal Blooms, Hypoxia, and Human Health of the Joint Subcommittee on Ocean Science and Technology. Washington, DC.
Citation
Johanna Yletyinen.
Chester River, USA.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2012-01-12 10:35:02 GMT.
Published in
Case Studies
Wells Inlet, USA
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Wells Inlet hypoxia has a daily cycle from supersaturated to hypoxic, and it was first recorded in the 1990s.
Type of regime shift
Ecosystem type
- Marine & coastal
Land uses
- Fisheries
Spatial scale of the case study
- Local/landscape (e.g. lake, catchment, community)
Continent or Ocean
- North America
Region
- West coast of USA
Countries
- United States
Locate with Google Map
Key References
-
Committee on Environment and Natural Resources. 2010. Scientific Assessment of Hypoxia in U.S. Coastal Waters. Interagency Working Group on Harmful Algal Blooms, Hypoxia, and Human Health of the Joint Subcommittee on Ocean Science and Technology. Washington, DC.
Citation
Johanna Yletyinen.
Wells Inlet, USA.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2012-01-12 10:19:24 GMT.
Published in
Case Studies
Calcasieu Lake, USA
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Hypoxia was recorded in the 1980s. Hypoci conditions have improved in the 1990s and 2000s.
Type of regime shift
Ecosystem type
- Freshwater lakes & rivers
Land uses
- Fisheries
- Conservation
Spatial scale of the case study
- Local/landscape (e.g. lake, catchment, community)
Continent or Ocean
- North America
Region
- Southern USA
Countries
- United States
Locate with Google Map
Key References
-
Committee on Environment and Natural Resources. 2010. Scientific Assessment of Hypoxia in U.S. Coastal Waters. Interagency Working Group on Harmful Algal Blooms, Hypoxia, and Human Health of the Joint Subcommittee on Ocean Science and Technology. Washington, DC.
Citation
Johanna Yletyinen.
Calcasieu Lake, USA.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2012-01-11 12:49:50 GMT.
Published in
Case Studies
Breton and Chandeleur Sounds, USA
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Breton and Chandeleur Sounds were first recorded to be hypoxic in the 1990s. Neither of them is believed to have been hypoxic in the 1980s.
Type of regime shift
Ecosystem type
- Marine & coastal
Land uses
- Fisheries
- Conservation
Spatial scale of the case study
- Local/landscape (e.g. lake, catchment, community)
Continent or Ocean
- North America
Region
- Gulf of Mexico
Countries
- United States
Locate with Google Map
Key References
-
Committee on Environment and Natural Resources. 2010. Scientific Assessment of Hypoxia in U.S. Coastal Waters. Interagency Working Group on Harmful Algal Blooms, Hypoxia, and Human Health of the Joint Subcommittee on Ocean Science and Technology. Washington, DC.
Citation
Johanna Yletyinen.
Breton and Chandeleur Sounds, USA.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2012-11-27 15:21:19 GMT.
Published in
Case Studies
Atchafalaya and Vermillion Bays, USA
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Hypoxia, which in these systems is significantly caused by stratification, was first recorded in 2000s.
Type of regime shift
Ecosystem type
- Freshwater lakes & rivers
Land uses
- Fisheries
- Conservation
Spatial scale of the case study
- Local/landscape (e.g. lake, catchment, community)
Continent or Ocean
- North America
Region
- Gulf of Mexico
Countries
- United States
Locate with Google Map
Key References
-
Committee on Environment and Natural Resources. 2010. Scientific Assessment of Hypoxia in U.S. Coastal Waters. Interagency Working Group on Harmful Algal Blooms, Hypoxia, and Human Health of the Joint Subcommittee on Ocean Science and Technology. Washington, DC.
Citation
Johanna Yletyinen.
Atchafalaya and Vermillion Bays, USA.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 16:01:17 GMT.
Published in
Case Studies
Amite River, USA
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Amite river hypoxia was first documented in 1990s and resulted in reduced benthos and loss of larg clams.
Type of regime shift
Ecosystem type
- Freshwater lakes & rivers
Land uses
- Fisheries
Spatial scale of the case study
- Sub-continental/regional (e.g. southern Africa, Amazon basin)
Continent or Ocean
- North America
Region
- Mississippi, Louisiana
Countries
- United States
Locate with Google Map
Key References
-
Committee on Environment and Natural Resources. 2010. Scientific Assessment of Hypoxia in U.S. Coastal Waters. Interagency Working Group on Harmful Algal Blooms, Hypoxia, and Human Health of the Joint Subcommittee on Ocean Science and Technology. Washington, DC.
Citation
Johanna Yletyinen.
Amite River, USA.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 16:26:00 GMT.
Published in
Case Studies
Sapelo Island, USA
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
In Sapelo Island hypoxia has daily cycle from supersaturated to hypoxic. It was first recorded in the 2000s.
Type of regime shift
Ecosystem type
- Marine & coastal
Land uses
- Conservation
Spatial scale of the case study
- Local/landscape (e.g. lake, catchment, community)
Continent or Ocean
- North America
Region
- East coast of USA
Countries
- United States
Locate with Google Map
Key References
-
Committee on Environment and Natural Resources. 2010. Scientific Assessment of Hypoxia in U.S. Coastal Waters. Interagency Working Group on Harmful Algal Blooms, Hypoxia, and Human Health of the Joint Subcommittee on Ocean Science and Technology. Washington, DC.
Citation
Johanna Yletyinen.
Sapelo Island, USA.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2012-01-12 09:34:43 GMT.
Published in
Case Studies
Ten Thousand Islands, USA
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Hypoxia was first recorded in the 2000s.
Type of regime shift
Ecosystem type
- Marine & coastal
Land uses
- Conservation
Spatial scale of the case study
- Sub-continental/regional (e.g. southern Africa, Amazon basin)
Continent or Ocean
- North America
Region
- Florida
Countries
- United States
Locate with Google Map
Key References
-
Committee on Environment and Natural Resources. 2010. Scientific Assessment of Hypoxia in U.S. Coastal Waters. Interagency Working Group on Harmful Algal Blooms, Hypoxia, and Human Health of the Joint Subcommittee on Ocean Science and Technology. Washington, DC.
Citation
Johanna Yletyinen.
Ten Thousand Islands, USA.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2012-01-12 10:08:26 GMT.
Published in
Case Studies
