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Case Studies (332)
Venice Lagoon, Italy
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Organic matter, persistent high temperature and stable weather conditions cause anoxia, which can be entended to the entire water column of the Lagoon of Venice. The lagoon area has been modified by humans for fish farming and for agricultural and industrial purposes (land reclamation).
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
- Europe
Region
- Mediterranean
Countries
- Italy
Locate with Google Map
Key References
-
Flindt MR, Kamp-Nielsen L, Marques JC, Pardal MA, Bocci M, Bendoricchio G, Salomonsen J, Nielsen SN, Jorgensen SE. 1997.Description of the three shallow estuaries: Mondego River (Portugal), Roskilde Fjord (Denmark) and the Lagoon of Venice (Italy). Ecological Modelling 102, 17-31.
Citation
Johanna Yletyinen.
Venice Lagoon, Italy.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2012-01-12 10:16:54 GMT.
Published in
Case Studies
Orbetello Lagoon, Italy
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Hypoxia in the Ortobello Lagoon is caused by eutrophication that began in the 1980s. Two severe anoxic crises occurred in 1992 and 1993.
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
- Mediterranean
Countries
- Italy
Locate with Google Map
Key References
-
Lardicci C, Como S, Corti S, Rossi F. 2001. Changes and recovery of macrozoobenthic communities after restoration measures of the Orbetello Lagoon (Tyrrhenian coast, Italy). Aquatic Conservation Marine and Freshwater Ecosystems 11, 281-287.
Citation
Johanna Yletyinen.
Orbetello Lagoon, Italy.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2012-01-12 08:17:06 GMT.
Published in
Case Studies
Goro Lagoon, Italy
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Summer hypoxia in the Goro Lagoon 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
- Mediterranean
Countries
- Italy
Locate with Google Map
Key References
-
Marchini A, Gauzer K, Occhipinti-Ambrogi A. 2004. Marine Pollution Bulletin 48, 1084-1095.
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Reizopoulou S, Thessalou-Legaki M, Nicolaidou A. 1996. Assessment fo disturbance in Mediterranean lagoons: an evaluation of methods. Marine Biology 125, 189-197.
Citation
Johanna Yletyinen.
Goro Lagoon, Italy.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:25:52 GMT.
Published in
Case Studies
Adriatic Sea
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
The occurrence of anoxic events and subsequent benthic mortalities have increased during the past years. There are many observations about the anoxic conditions in the near-bottom layer during summer in certain parts of the northern Adriatic Sea. Mass mortalities have been recorded in different parts of the sea. It is suggested that hypoxia and anoxia are caused not only by changes in temperature, salinity and general circulation but that the recent changes are caused by increased nutrient input from land-based sources.
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
- Mediterranean
Countries
- Montenegro
- Slovenia
- Albania
- Bosnia and Herzegovina
- Croatia
- Italy
Locate with Google Map
Key References
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Justic D, Legovic T, Rottini-Sandrini L. 1987. Trends in oxygen content 1911-1984 and occurrence of benthic mortality in the northern Adriatic Sea. Estuarine, Coastal and Shelf Science 25, 435-445.
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Justic D. 1991. Hypoxic conditions in the northern Adriatic Sea: historical development and ecological significance. Geological Society, London, Special Publications 58, 95-105.
Citation
Johanna Yletyinen.
Adriatic Sea.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2012-01-11 10:51:05 GMT.
Published in
Case Studies
Gulf of Eilat / Aqaba, Israel
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Fish farming was established in the Gulf of Aqaba in 1988. It affects the local benthos due to discharge of large amounts of organic matter. Eutrophication caused by the fish farming has harmed the corals and comprises a serious threat to the existence of the unique coral reefs of Eilat.
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
- Middle East
Countries
- Israel
Locate with Google Map
Key References
-
Katz T, Herut B, Genin A, Angel DL. 2002. Gray mullets ameliorate organically enriched sediments below a fish farm in the oligotrophic Gulf of Aqaba (Red Sea). Marine Ecology Progress Series 234, 205-214.
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Loya Y, Kramarsky-Winter E. 2003. In situ eutrophication caused by fish farms in the northern Gulf of Eilat (Aqaba) is beneficial for its coral reef: a critique. Marine Ecology Progress Series 261, 299-303.
Citation
Johanna Yletyinen.
Gulf of Eilat / Aqaba, Israel.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:26:03 GMT.
Published in
Case Studies
Lough Hyne (Ine), Ireland
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Hypoxia in the Lough Hyne is annual (summer) and has caused mass mortality of the sessile benthic fauna. Mobile fish and crustasceans avoid the hypoxic areas. The regular hypoxic episodes have modified the structure of the benthic community through mass mortality, recolonization and mobile species' avoidance of the hypoxic zone.
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
- Europe
Region
- Ireland
Countries
- United Kingdom
Locate with Google Map
Key References
-
McAllen R, Davenport J, Bredendieck K, Dunne D. 2009. Seasonal structuring of a benthic community exposed to regular hypoxic events. Journal of Experimental Marine Biology and Ecology 368, 67-74.
Citation
Johanna Yletyinen.
Lough Hyne (Ine), Ireland.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:27:52 GMT.
Published in
Case Studies
Gialova Lagoon, Greece
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Seasonal hypoxia in the Gialova Lagoon causes benthic mass 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
- Mediterranean
Countries
- Greece
Locate with Google Map
Key References
-
Koutsoubas D, Arvaniditis C, Dounas C, Drummond L. 2000. Community structure and dynamics of the molluscan fauna in a Mediterranean lagoon (Gialova lagoon, SW Greece). Belg. J. Zool. 130, 131-138.
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Koutsoubas D, Dounas C, Arvanitidis C, Kornilios S, Petihakis G, Triantafyllou G, Eleftheriou A. 2000. Macrobenthic community structure and disturbance assessment in Gialova Lagoon, Ionian Sea. ICES J. Mar. Sci. 57, 1472-1480.
Citation
Johanna Yletyinen.
Gialova Lagoon, Greece.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:27:55 GMT.
Published in
Case Studies
Elefsis Bay, Greece
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Low dissolved oxygen content was first observed in the Elefsis Bay in 1973. The bay is eutrophic due to a.o. the disposal of Athen's untreated wastewater into the bay, absence of river discharge and limited circulation in the bay. Anoxic conditions are created in summer by the combination of strong thermal stratification and absence of water exchange with Saronikos Gulf.
The Elefsis Bay ecosystem has reduced species diversity and strong oscillations of plankton annual cycles.
The Elefsis Bay ecosystem has reduced species diversity and strong oscillations of plankton annual cycles.
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
- Mediterranean
Countries
- Greece
Locate with Google Map
Key References
-
Theodorou A. 1996. Long-term environment effects of raw sewage disposal in Elefsis Bay (Saronikos Gulf, Greece). Samara Publishing Ltd., Cardigan.
Citation
Johanna Yletyinen.
Elefsis Bay, Greece.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2011-12-19 15:27:57 GMT.
Published in
Case Studies
Pomeranian Bay, The Baltic Sea
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Hypoxia in Pomeranian Bay was first detected in 1994. It was caused by a combination of high nutrient loads and extraordinary meteorological and hydrographical conditions. Macrobenthos, which had significantly decreased after the hypoxic event, recolonized the affected area, but the recolonization required several years. Even amphipods disappeared from the hypoxic zones.
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
- The Baltic Sea
Countries
- Poland
- Germany
Locate with Google Map
Key References
-
Powilleit M, Kube J. 1999. Effects of severe oxygen depletion on macrobenthos in the Pomeranian Bay (southern Baltic Sea): a case study in a shallow, sublittoral habitat characterised by low species richness. Journal of Sea Research 42, 221-234.
Citation
Johanna Yletyinen.
Pomeranian Bay, The Baltic Sea.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2012-01-12 08:54:50 GMT.
Published in
Case Studies
Bay of Mecklenburg, Baltic Sea
Main Contributors:
Johanna Yletyinen
Other Contributors:
Summary
Seasonal hypoxic events lasting several months affect the Mecklenburg Bay. In central and southern Lübeck Bay (i.e. southwestern part of the Mecklenburg Bay) it has been observed that during the periods of improved oxygen conditions, benthic fauna recolonizes the affected areas. A severe hypoxic event in Mecklenburg Bay occurred in 1988.
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
- The Baltic Sea
Countries
- Denmark
- Germany
Locate with Google Map
Key References
-
Prena J, Gosselck F, Schroeren V, Voss J. 1997. Periodic and episodic bnethos recruitment in southwest Mecklenburg Bay (western Baltic Sea). Helgoländer Meeresuntersuchungen 51, 1-21.
Citation
Johanna Yletyinen.
Bay of Mecklenburg, Baltic Sea.
In: Regime Shifts Database, www.regimeshifts.org.
Last revised 2012-01-11 12:22:24 GMT.
Published in
Case Studies
