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Case Studies
Case Studies

Case Studies (329)

Tuesday, 20 December 2011 13:53

Estuary of Bilbao, Spain

Written by Johanna

Estuary of Bilbao, Spain

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Severe hypoxia in Bilbao estuary is caused by large population, industry on the Atlantic coast, land reclamation, modification of the landscape and extensive dredging activities. Hypoxia is seasonal and has caused benthic mortality.

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

  • South Europe

Countries

  • Spain

Locate with Google Map

Key References

  1. Saiz-Salinas JI, Gonzales-Oreja JA. 2000. Stress in estuarine communities: lessons from the highly-impacted Bilbao estuary (Spain). Journal of Aquatic Ecosystem Stress and Recovery 7, 43-55.

Citation

Johanna Yletyinen. Estuary of Bilbao, Spain. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2012-03-17 19:08:41 GMT.
Tuesday, 20 December 2011 13:40

Oslofjorden, Norway

Written by Johanna

Oslofjorden, Norway

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Seasonal hypoxia in Oslofjorden causes benthic mortality with annual recolonization.

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

  • Norway

Locate with Google Map

Key References

  1. Mirza FB, Gray J. 1981. The fauna of benthic sediments from the organically enriched Oslofjord, Norway. Journal of Experimental Marine Biology and Ecology 54, 181-207.

Citation

Johanna Yletyinen. Oslofjorden, Norway. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2012-03-17 19:08:45 GMT.
Tuesday, 20 December 2011 13:25

Bojourquez (Nichupte) Lagoon, Mexico

Written by Johanna

Bojourquez (Nichupte) Lagoon, Mexico

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Nichupte is an estuarine lagoon connected to the Caribbean Sea by two channels. Bojorquez is a section of the lagoon with great anthropogenic impacts. The lagoon is affected by sewage discharge from the city of Cancun. Hypoxia might occur  particularly at theBojorquez zone. 

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

  • South America

Region

  • Central America

Countries

  • Mexico

Locate with Google Map

Key References

  1. Valdes-Lozano D, Chumarero M, Real E. 2006. Sediment oxygen consumption in a developed coastal lagoon of the Mexican Caribbean. Indian Journal of Marine Sciences 35, 227-234.

Citation

Johanna Yletyinen. Bojourquez (Nichupte) Lagoon, Mexico. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2012-03-17 19:08:47 GMT.
Tuesday, 20 December 2011 12:12

Masan Bay, Korea

Written by Johanna

Masan Bay, Korea

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Hypoxia in Masan Bay was first recorded in 1970s. It is seasonal and related to summer algal blooms.

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

  • Korea, Republic of (South Korea)

Locate with Google Map

Key References

  1. Kim H-G. 1990. Characteristics of flagellate red tide and environmental conditions in Masan Bay. Bulletin of National Fisheries Research and Development Agency 43, 1–40.
  2. Lim H-S, Diaz R, Hong J-S, Schaffner L. 2006. Hypoxia and benthic community recovery in Korean coastal waters. Marine Pollution Bulletin 52, 1517-1526.

Citation

Johanna Yletyinen. Masan Bay, Korea. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2012-03-17 19:08:49 GMT.
Tuesday, 20 December 2011 10:19

Youngsan Estuary, Korea

Written by Johanna

Youngsan Estuary, Korea

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Hypoxia in Youngsan Estuary is seasonal and moderate, but gradually increasing with time. It has caused benthic mass mortality and reduced fisheries. Recolonization of affected areas occurs but the community does not return to the structure it had before the hypoxic event.

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

  • Korea, Republic of (South Korea)

Locate with Google Map

Key References

  1. Lim H-S, Diaz R, Hong J-S, Schaffner L. 2006. Hypoxia and benthic community recovery in Korean coastal waters. Marine Pollution Bulletin 52, 1517-1526.

Citation

Johanna Yletyinen. Youngsan Estuary, Korea. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2012-03-17 19:08:55 GMT.
Tuesday, 20 December 2011 09:57

Kamak bay, South Korea

Written by Johanna

Kamak bay, South Korea

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Hypoxia in Kamak Bay is seasonal and moderate, but gradually increasing with time. It has caused benthic mortality and reduced fisheries. Fauna recovers from the hypoxic events, although slowly.  

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

  • Korea, Republic of (South Korea)

Locate with Google Map

Key References

  1. Lim H-S, Diaz R, Hong J-S, Schaffner L. 2006. Hypoxia and benthic community recovery in Korean coastal waters. Marine Pollution Bulletin 52, 1517-1526.

Citation

Johanna Yletyinen. Kamak bay, South Korea. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2012-03-17 19:08:58 GMT.
Tuesday, 20 December 2011 09:39

Chonsu Bay, Korea

Written by Johanna

Chonsu Bay, Korea

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Hypoxia in Chonsu Bay is moderate but gradually increasing with time. It is seasonal and develops in summer. Hypoxia has resulted in benthic mortality and reduced fisheries.  

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

  • Korea, Republic of (South Korea)

Locate with Google Map

Key References

  1. Lim H-S, Diaz R, Hong J-S, Schaffner L. 2006. Hypoxia and benthic community recovery in Korean coastal waters. Marine Pollution Bulletin 52, 1517-1526.

Citation

Johanna Yletyinen. Chonsu Bay, Korea. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2012-03-17 19:09:03 GMT.
Monday, 19 December 2011 15:20

Tomoe Cove, Japan

Written by Johanna

Tomoe Cove, Japan

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Fish farming in Tomoe cove began in 1973. The organic pollution of the bottom water has caused dramatic changes in fauna and decline of benthic communitites. Bottom water hypoxia has resulted indisappearance of benthic animals. The defaunated areas have been recolonized during autumn.

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

  • Japan

Locate with Google Map

Key References

  1. Tsutsumi H, Kikuchi T, Tanaka M, Higashi T, Imasaka K, Miyazaki M. 1991. Benthic faunal succession in a cove organically polluted by fish farming. Marine Pollution Bulletin 23, 233-238.

Citation

Johanna Yletyinen. Tomoe Cove, Japan. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2012-01-12 10:12:24 GMT.
Monday, 19 December 2011 15:04

Suo-Nada, Japan

Written by Johanna

Suo-Nada, Japan

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Strong stratification is formed in the western Suo-Nada during summers, causing hypoxic water mass to develop near the bottom. Aquaculture industry has been strongly affected by the hypoxia, e.g. during the summer of 1988 about 95% of the oystersdied.  

Type of regime shift

Ecosystem type

  • Marine & coastal

Land uses

  • Fisheries

Spatial scale of the case study

  • Sub-continental/regional (e.g. southern Africa, Amazon basin)

Continent or Ocean

  • Asia

Region

  • East Asia

Countries

  • Japan

Locate with Google Map

Key References

  1. Senjyu T, Yasuda H, Sugihara S, Kamizono M. 2001. Current and turbidity variations in the western part of the Suo-Nada, the Seto Inland Sea, Japan: a hypothesis on the oxygen-deficient water mass formation. Journal of Oceanography 57, 15-27.

Citation

Johanna Yletyinen. Suo-Nada, Japan. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2012-01-12 10:02:39 GMT.
Monday, 19 December 2011 14:45

Seto Inland Sea, Japan

Written by Johanna

Seto Inland Sea, Japan

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Seasonal hypoxia in Seto Inland Sea has caused mortality both in benthos and fish species.

Type of regime shift

Ecosystem type

  • Marine & coastal

Land uses

  • Fisheries

Spatial scale of the case study

  • Sub-continental/regional (e.g. southern Africa, Amazon basin)

Continent or Ocean

  • Europe

Region

  • East Asia

Countries

  • Japan

Locate with Google Map

Key References

  1. Imabayashi H. 1986. Effect of oxygen-deficient water on the settled abundance and size composition of the bivalve Theora lubrica. Bulletin of the Japanese Society of Scientific Fisheries 52, 391-397.

Citation

Johanna Yletyinen. Seto Inland Sea, Japan. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2011-12-19 15:20:22 GMT.