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Case Studies (332)
Als, Denmark
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Hypoxia in Als was first recorded in 1920s.
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
- Europe
Region
- Northern Europe
Countries
- Denmark
Locate with Google Map
Key References
-
Diaz R, Rosenberg R. 2008. Spreading Dead Zones and Consequences for Marine Ecosystems. Science 321, 926-929.
Citation
Johanna Yletyinen.
Als, Denmark.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:33:43 GMT.
Published in
Case Studies
Mariager Fjord, Denmark
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Mariager Fjord is a long, narrow fjord with a permanently anoxic basin. The fjord is eutrophic due to the increased nutrient loading during the past 100 years. A shift in species composition has taken place in Mariager Fjord and it is suggested that it is a consequence of nutrient inputs.
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
- Europe
Region
- North Europe
Countries
- Denmark
Locate with Google Map
Key References
-
Lundholm N, Clarke A, Ellegaard M. 2010. A 100-year record of changing Pseudo-nitzschia species in a sill-fjord in Denmark related to nitrogen loading and temperature. Harmful Algae 9, 449-457.
Citation
Johanna Yletyinen.
Mariager Fjord, Denmark.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:35:18 GMT.
Published in
Case Studies
Tolo Harbor, China
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Seasonal hypoxia has caused mass mortality in Tolo Harbor. Fauna recovers rapidly (from several months to one year) during winter.
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
- Asia
Region
- East Asia
Countries
- China, People's Republic of
Locate with Google Map
Key References
-
Daoji L, Daler D. 2004. Ocean Pollution from Land-based Sources: East China Sea, Chin. Ambio 40, 107-113.
Citation
Johanna Yletyinen.
Tolo Harbor, China.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:35:23 GMT.
Published in
Case Studies
Tracadie & Winter Bays
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Tracadie and Winter bays (two adjoining bays) experience seasonal hypoxia. The water system is used for mussel farming.
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
- Prince Edward Island
Countries
- Canada
Locate with Google Map
Key References
-
Miron G, Landry T, Archambault P, Frenette B. 2005. Effects of mussel culture husbandry practices on various benthic characteristics. Aquaculture 250, 138-154.
Citation
Johanna Yletyinen.
Tracadie & Winter Bays.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:35:26 GMT.
Published in
Case Studies
Saanich Inlet, Canada
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Saanich Inlet is a temperate marine fjord. The deep water is naturally low in dissolved oxygen througout the year. During the summer, complete anoxia may develop. Organic carbon inputs into the fjord have increased due to logging rates.
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 Canada
Countries
- Canada
Locate with Google Map
Key References
-
Tunnicliffe, V. 2000. A fine-scale record of 130 years of organic carbon deposition in an anoxic fjord, Saanich Inlet, British Columbia. American Society of Limnology and Oceanography 45, 1380-1387.
Citation
Johanna Yletyinen.
Saanich Inlet, Canada.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:52:38 GMT.
Published in
Case Studies
Rodrigo de Freitas Lagoon, Brazil
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Long water residence time in the Rodrigo de Freitas Lagoon and the high levels of organic matter cause eutrophication and seasonal hypoxia and anoxia. Fish kills have been observed.
Type of regime shift
Ecosystem type
- Marine & coastal
- Freshwater lakes & rivers
Land uses
- Fisheries
Spatial scale of the case study
- Local/landscape (e.g. lake, catchment, community)
Continent or Ocean
- North America|-|South America
Region
- Coastal Brazil
Countries
- Brazil
Locate with Google Map
Key References
-
Gutterres Vilela C, Silva Batista D, Baptista Neto JA, Olindo Chiselli R. 2011. Benthic foraminifera distribution in a tourist lagoon in Rio de Janeiro, Brazil: A response to anthropogenic impacts. Marine Pollution Bulletin 62, 2055-2074.
Citation
Johanna Yletyinen.
Rodrigo de Freitas Lagoon, Brazil.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2012-01-12 09:12:12 GMT.
Published in
Case Studies
Pina Basin, Brazil
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Pina basin is a shallow estuary which is separated from ocean by a natural reef dyke of calcareous sandstone and into which several rivers flow. Pina basin receives large quantities of untreated or little treated sewage and is therefore polluted, eutrophic and hypoxic. Hypoxia has affected meiobenthic community structure.
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
- Coastal Brazil
Countries
- Brazil
Locate with Google Map
Key References
-
Somerfield PJ, Fonseca-Genevois VG, Rodriguez ACL, Castro FJV, Santos GAP. 2003. Factors a¡ecting meiofaunal community structure in the Pina Basin, an urbanized embayment on the coast of Pernambuco, Brazil. Journal of the Marine Biological Associations of the UK 83, 1209-1213.
Citation
Johanna Yletyinen.
Pina Basin, Brazil.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2012-01-12 08:49:41 GMT.
Published in
Case Studies
Conceição Lagoon, Brazil
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Seasonal hypoxia occurs in spring and summer time, even anoxia may develop. Hypoxia has resulted in fish kills. The lagoon has suffered from the release of domestic sewage and population increase. Additionally, the canal that connects the lagoon to the ocean is narrow, making the water exchange poor and water residence time high. Thus, the ecosystem is sensitive to eutrophication.
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
- South America
Region
- Coastal Brazil
Countries
- Brazil
Locate with Google Map
Key References
-
Fonseca A, Braga ES. 2004. Temporal Dynamic of the Dissolved Nutrients and the Eutrophization Processes in a Southern Brazilian Coastal Lagoon, Conceição Lagoon. Journal of Coastal Research 39, 1229-1233.
Citation
Johanna Yletyinen.
Conceição Lagoon, Brazil.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:50:27 GMT.
Published in
Case Studies
Chetumal Bay, Belize
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Chetumal Bay experiences seasonal hypoxia due to untreated sewage and agricultural runoff. Uncontrolled use of pesticides and fertilizers in agriculture in Central America is one major source of pollution. Hypoxia has affected coral reefs.
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
- Central America
Countries
- Mexico
- Belize
Locate with Google Map
Key References
-
Isaza CFA, Sierra-Correa PC, Bernal-Velasquez M, Londoño LM, and Troncoso W. 2006. Global International Waters Assessment. Caribbean Sea/Colombia & Venezuela, Central America & Mexico, GIWA Regional assessment 3b, 3c. University of Kalmar on behalf of United Nations Environment Programme, Kalmar.
Citation
Johanna Yletyinen.
Chetumal Bay, Belize.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2012-01-11 13:16:02 GMT.
Published in
Case Studies
Horseshoe Lagoon, Australia
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Horseshoe Lagoon faces seasonal hypoxia. The lagoon has become rich in nutrients due to Sewage Treatment Plan connection in the late-50s and catchment urbanization in the 70s.
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
- Australia & New Zealand
Region
- East Australia
Countries
- Australia
Locate with Google Map
Key References
-
Donnelly TH, Ford PW, McGregor D, Allen D. 1999. Anthropogenic changes to a billabong in New South Wales. 1. Lagoon evolution and phosphorus dynamics. Marine Freshwater Research 50, 689-698.
Citation
Johanna Yletyinen.
Horseshoe Lagoon, Australia.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:47:34 GMT.
Published in
Case Studies
