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Case Studies
Case Studies

Case Studies (330)

Monday, 19 December 2011 13:31

Lake Shinji, Japan

Written by Johanna

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

  1. 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.
Monday, 19 December 2011 13:20

Lake Nakaumi, Japan

Written by Johanna

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

  1. 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.
Monday, 19 December 2011 13:02

Kumihama Bay, Japan

Written by Johanna

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

  1. 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.
Monday, 19 December 2011 12:49

Ise Bay, Japan

Written by Johanna

Ise Bay, Japan

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Seasonal hypoxia has caused benthic mass mortality and reduced fisheries in shallow areas and tidal flats.

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. Nakata K, Takei M, Nakane T, Maxwell G, Torpie D. 1997. Dissolved oxygen depletion analysis and visualization in Ise Bay, Japan, using a GIS approach. 11th Annual Australian ESRI & ERDAS Users Conference Proceedings.

Citation

Johanna Yletyinen. Ise Bay, Japan. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2011-12-19 15:22:15 GMT.
Monday, 19 December 2011 12:41

Hiuchi Sound, Japan

Written by Johanna

Hiuchi Sound, Japan

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Seasonal hypoxia in Hiuchi Sound 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

  • Asia

Region

  • East Asia

Countries

  • Japan

Locate with Google Map

Key References

  1. Sanukida S, Okamoio H, Hitomi M. 1984. Alternation of pollution indicator species of macrobenthos during stagnant period in eastern Hiuchi Sound. Bull. Jap. Soc. Sci. Fish./Nissuishi 50, 727.

Citation

Johanna Yletyinen. Hiuchi Sound, Japan. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2011-12-19 15:22:19 GMT.
Monday, 19 December 2011 12:23

Hakata Bay, Japan

Written by Johanna

Hakata Bay, Japan

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Hypoxia in the bottom waters of the inner Hakata bay is caused byexcessive inputs of nutrients and organic materials and strong stratification caused by meteorology and freshwater inflow.   

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. Karim R, Sekine M, Ukita M. 2002. Simulation of eutrophication and associated occurrence of hypoxic and anoxic condition in a coastal bay in Japan. Marine Pollution Bulletin 45, 280-285.

Citation

Johanna Yletyinen. Hakata Bay, Japan. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2012-01-11 14:09:10 GMT.
Monday, 19 December 2011 12:15

Gokashu Bay, Japan

Written by Johanna

Gokashu Bay, Japan

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Hypoxia in Gokasho Bay is caused by both anthropogenic (aquaculture) and natural factors.

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

  • East Asia

Countries

  • Japan

Locate with Google Map

Key References

  1. Yokoyama H. 2002. Impact of fish and pearl farming on the benthic environments in Gokasho Bay: Evaluation from seasonal fluctuations of the macrobenthos. Fisheries Science 68, 258-268.

Citation

Johanna Yletyinen. Gokashu Bay, Japan. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2012-01-11 13:55:53 GMT.
Monday, 19 December 2011 11:59

Funka Bay, Japan

Written by Johanna

Funka Bay, Japan

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Hypoxia in Funka Bay was not observed until in the 1980s. During the summer and autumn of 1995 - 1997, severe hypoxia occurred in the bay and affected the fauna, e.g. coonstripe shrimp (Pandalus hypsinotus) decreased drastically in the hypoxic area.

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. Kimura M, Takahashi T, Takatsu T, Nakatani T, Maeda T. 2004. Effects of hypoxia on principal prey and growth of flathead flounder Hippoglossoides dubius in Funka Bay, Japan. Fisheries Science 70, 537-545.

Citation

Johanna Yletyinen. Funka Bay, Japan. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2012-01-12 11:35:40 GMT.
Monday, 19 December 2011 11:39

Dokai Bay, Japan

Written by Johanna

Dokai Bay, Japan

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Dokai Bay is eutrophic. According to a study based on measures in 1992 and 1993, hypoxia occurs from the bottom to the middle water layer during summers. On the tidal flats oxygen is accessible to benthic animals throughout the year, but the number of macrobenthos decline nevertheless.

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. Ueda N, Tsutsumi H, Yamada M, Hanamoto K, Montani S. 2000. Impacts of oxygen-deficient water on the macrobenthic fauna of Dokai Bay and on adjacent intertidal flats, in Kitakyushu, Japan. Marine Pollution Bulletin 40, 906-913.

Citation

Johanna Yletyinen. Dokai Bay, Japan. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2012-01-11 13:31:57 GMT.
Monday, 19 December 2011 11:24

Beppu Bay, Japan

Written by Johanna

Beppu Bay, Japan

Main Contributors:

Johanna Yletyinen

Other Contributors:

Summary

Hypoxia caused by topographic features of the bay.

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. Suzuki T. 2001. Oxygen-deficient waters along the Japanese coast and their effects upon the estuarine ecosystem. J. Environ. Qual. 30, 291-302-

Citation

Johanna Yletyinen. Beppu Bay, Japan. In: Regime Shifts Database, www.regimeshifts.org. Last revised 2011-12-19 15:23:52 GMT.