Message
Johanna
Tuesday, 20 December 2011 09:39
Chonsu Bay, Korea
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
-
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.
Published in
Case Studies
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Monday, 19 December 2011 15:20
Tomoe Cove, Japan
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
-
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.
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Monday, 19 December 2011 15:04
Suo-Nada, Japan
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
-
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.
Published in
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Monday, 19 December 2011 14:45
Seto Inland Sea, Japan
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
-
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.
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Monday, 19 December 2011 14:31
Osaka Bay, Japan
Osaka Bay, Japan
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
The area surrounding Osaka Bay has a population of more than 10 billion people. Both domestic and industrial wastewater is released in the Osaka Bay. One of the indirect results of the anthropogenic pollution is hypoxia. Benthic fauna is strongly influenced by the human impact, for instance ostracods have become scarce probably due to hypoxia.
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
-
Yasuhara M, Yamazaki H. 2005. The impact of 150 years of anthropogenic pollution on the shallow marine ostracode fauna, Osaka Bay, Japan. Marine Micropaleontology 55, 63-74.
Citation
Johanna Yletyinen.
Osaka Bay, Japan.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2012-01-12 08:31:50 GMT.
Published in
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Monday, 19 December 2011 14:22
Omura Bay, Japan
Omura Bay, Japan
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Hypoxia forms in the Omura Bay every summer and peaks in August.
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
-
Akagi S, Hirayama F. 1991. Formation of oxygen-deficient water mass in Omura Bay. Marine Pollution Bulletin 23, 661-663.
Citation
Johanna Yletyinen.
Omura Bay, Japan.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:20:52 GMT.
Published in
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Monday, 19 December 2011 14:13
Mikawa Bay, Japan
Mikawa Bay, Japan
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Mikawa Bay is one of the most eutrophic bays in Japan. Seasonal hypoxia has caused benthic mass 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
- Asia
Region
- East Asia
Countries
- Japan
Locate with Google Map
Key References
-
Suzuki T, Matsukawa Y. 1987. Hydrography and budget of dissolved total nitrogen and dissolved oxygen in the stratified season in Mikawa Bay, Japan. Journal of the Oceanographical Society of Japan 43, 37-48.
Citation
Johanna Yletyinen.
Mikawa Bay, Japan.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:21:26 GMT.
Published in
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Monday, 19 December 2011 13:31
Lake Shinji, Japan
Lake Shinji, Japan
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Lake Shinji has seasonal anoxia. The lake is eutrophic; it has been suggested that the eutrophication began in 1940s when population in the area increased.
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
- Asia
Region
- East Asia
Countries
- Japan
Locate with Google Map
Key References
-
Yamamuro M, Kanai Y. 2005. A 200-year record of natural and anthropogenic changes in water quality from coastal lagoon sediments of Lake Shinji, Japan. Chemical Geology 218, 51-61.
Citation
Johanna Yletyinen.
Lake Shinji, Japan.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:21:32 GMT.
Published in
Case Studies
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Monday, 19 December 2011 13:20
Lake Nakaumi, Japan
Lake Nakaumi, Japan
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Increased nutrient loading in to Lake Nakaumi caused eutrophication, which in turn has caused anoxia.
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
- Asia
Region
- East Asia
Countries
- Japan
Locate with Google Map
Key References
-
Katsuki K, Miyamoto Y, Yamada K, Takata H, Yamaguchi K, Nakayama D, Coops H, Kunii H, Nomura R, Khim B-K. 2008. Eutrophication-induced changes in Lake Nakaumi, southwest Japan. Journal of Paleolimnology 40, 1115–1125.
Citation
Johanna Yletyinen.
Lake Nakaumi, Japan.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:21:35 GMT.
Published in
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Monday, 19 December 2011 13:02
Kumihama Bay, Japan
Kumihama Bay, Japan
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Hypoxia develops from late spring through autumn. Kumihama bay is a lagoon, which is connected to the ocean only through a narrow strait.
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
- Asia
Region
- East Asia
Countries
- Japan
Locate with Google Map
Key References
-
Yokoyama H, 1995. Occurrence of Paraprionospio sp. (form A) larvae (polychaeta: spionidae) in hypoxic water of an enclosed bay. Estuarine, Coastal and Shelf Science 40, 9-19.
Citation
Johanna Yletyinen.
Kumihama Bay, Japan.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:22:11 GMT.
Published in
Case Studies
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