Ragnar Elmgren
Biographic Data
| ID | 1574718 |
|---|---|
| NAME | Ragnar Elmgren |
| GIVEN NAMES | Ragnar |
| FAMILY NAME | Elmgren |
| SIGNATURE | ELMGREN R |
| AFFILIATIONS | Stockholm University |
| VERIFIED | No |
| TOTAL WORKS | 13 |
| TOTAL CITATIONS | 34 |
| AUTHOR COUNT | 13 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2001 |
| LATEST PUBLICATION YEAR | 2022 |
| H-INDEX | 3 |
How oxygen deficiency in the Baltic Sea proper has spread and worsened
Even large inflows of oxygen-rich seawater to the Baltic Proper have in recent decades given only short-lived relief from oxygen deficiency below the halocline. We analyse long-term changes in oxygen deficiency, and calculate the “total oxygen debt” $$\Sigma$$ Σ OD, the oxygen required to oxidize the hydrogen sulphide (H 2 S) and ammonium (NH 4 ) that builds up during stagnation periods. Since the early 1990s, oxygen below 65m has gradually decre…
Assessing human effects on the Baltic Sea ecosystem
Baltic Sea management
Severe environmental problems documented in the Baltic Sea in the 1960s led to the 1974 creation of the Helsinki Convention for the Protection of the Marine Environment of the Baltic Sea Area. We introduce this special issue by briefly summarizing successes and failures of Baltic environmental management in the following 40 years. The loads of many polluting substances have been greatly reduced, but legacy pollution slows recovery. Top predator p…
Nitrogen fixation by cyanobacteria stimulates production in Baltic food webs
Filamentous, nitrogen-fixing cyanobacteria form extensive summer blooms in the Baltic Sea. Their ability to fix dissolved N2 allows cyanobacteria to circumvent the general summer nitrogen limitation, while also generating a supply of novel bioavailable nitrogen for the food web. However, the fate of the nitrogen fixed by cyanobacteria remains unresolved, as does its importance for secondary production in the Baltic Sea. Here, we synthesize recent…
Baltic Sea ecosystem-based management under climate change
Baltic Sea ecosystem-based management under climate change : Integrating social and ecological perspectives
Projected future climate change and Baltic Sea ecosystem management
Climate change is likely to have large effects on the Baltic Sea ecosystem. Simulations indicate 2-4 °C warming and 50-80 % decrease in ice cover by 2100. Precipitation may increase ~30 % in the north, causing increased land runoff of allochthonous organic matter (AOM) and organic pollutants and decreased salinity. Coupled physical-biogeochemical models indicate that, in the south, bottom-water anoxia may spread, reducing cod recruitment and incr…
Baltic Sea ecosystem-based management under climate change
Ecosystem-based management (EBM) has emerged as the generally agreed strategy for managing ecosystems, with humans as integral parts of the managed system. Human activities have substantial effects on marine ecosystems, through overfishing, eutrophication, toxic pollution, habitat destruction, and climate change. It is important to advance the scientific knowledge of the cumulative, integrative, and interacting effects of these diverse activities…
A Systems Approach Framework for the Transition to Sustainable Development
Hopkins , T. S., D. Bailly, R. Elmgren, G. Glegg, A. Sandberg, and J. G. Støttrup. 2012. A systems approach framework for the transition to sustainable development: potential value based on coastal experiments. Ecology and Society 17(3): 39. https://doi.org/10.5751/ES-05266-170339
Participatory Social-Ecological Modeling in Eutrophication Management
Franzén, F., G. Kinell, J. Walve, R. Elmgren, and T. Söderqvist 2011. Participatory Social-Ecological Modeling in Eutrophication Management: the case of Himmerfjärden, Sweden. Ecology and Society 16(4): 27. https://doi.org/10.5751/ES-04394-160427
Adaptive Coastal Planning and the European Union's Water Framework Directive
The implementation of the EU Water Framework Directive and the achievement of its water quality objectives will to a large degree depend on scientific knowledge about the sources and status of water resources and the effects of mitigative measures. Coastal waters will be of central interest, since the management of whole river basins may be affected if coastal water status is not satisfactory. The Water Directive's general directions on what info…
Adaptive Coastal Planning and the European Union's Water Framework Directive
The implementation of the EU Water Framework Directive and the achievement of its water quality objectives will to a large degree depend on scientific knowledge about the sources and status of water resources and the effects of mitigative measures. Coastal waters will be of central interest, since the management of whole river basins may be affected if coastal water status is not satisfactory. The Water Directive's general directions on what info…
Understanding Human Impact on the Baltic Ecosystem
Grave environmental problems, including contamination of biota by organochlorines and heavy metals, and increasing deep-water oxygen deficiency, were discovered in the Baltic Sea in the late 1960s. Toxic pollutants, including the newly discovered PCB, were initially seen as the main threat to the Baltic ecosystem, and the impaired reproduction found in Baltic seals and white-tailed eagles implied a threat also to human fish eaters. Countermeasure…
Understanding Human Impact on the Baltic Ecosystem
Grave environmental problems, including contamination of biota by organochlorines and heavy metals, and increasing deep-water oxygen deficiency, were discovered in the Baltic Sea in the late 1960s. Toxic pollutants, including the newly discovered PCB, were initially seen as the main threat to the Baltic ecosystem, and the impaired reproduction found in Baltic seals and white-tailed eagles implied a threat also to human fish eaters. Countermeasure…
Understanding Human Impact on the Baltic Ecosystem
Grave environmental problems, including contamination of biota by organochlorines and heavy metals, and increasing deep-water oxygen deficiency, were discovered in the Baltic Sea in the late 1960s. Toxic pollutants, including the newly discovered PCB, were initially seen as the main threat to the Baltic ecosystem, and the impaired reproduction found in Baltic seals and white-tailed eagles implied a threat also to human fish eaters. Countermeasure…
Baltic Sea management
Severe environmental problems documented in the Baltic Sea in the 1960s led to the 1974 creation of the Helsinki Convention for the Protection of the Marine Environment of the Baltic Sea Area. We introduce this special issue by briefly summarizing successes and failures of Baltic environmental management in the following 40 years. The loads of many polluting substances have been greatly reduced, but legacy pollution slows recovery. Top predator p…
Projected future climate change and Baltic Sea ecosystem management
Climate change is likely to have large effects on the Baltic Sea ecosystem. Simulations indicate 2-4 °C warming and 50-80 % decrease in ice cover by 2100. Precipitation may increase ~30 % in the north, causing increased land runoff of allochthonous organic matter (AOM) and organic pollutants and decreased salinity. Coupled physical-biogeochemical models indicate that, in the south, bottom-water anoxia may spread, reducing cod recruitment and incr…
Nitrogen fixation by cyanobacteria stimulates production in Baltic food webs
Filamentous, nitrogen-fixing cyanobacteria form extensive summer blooms in the Baltic Sea. Their ability to fix dissolved N2 allows cyanobacteria to circumvent the general summer nitrogen limitation, while also generating a supply of novel bioavailable nitrogen for the food web. However, the fate of the nitrogen fixed by cyanobacteria remains unresolved, as does its importance for secondary production in the Baltic Sea. Here, we synthesize recent…
Participatory Social-Ecological Modeling in Eutrophication Management
Franzén, F., G. Kinell, J. Walve, R. Elmgren, and T. Söderqvist 2011. Participatory Social-Ecological Modeling in Eutrophication Management: the case of Himmerfjärden, Sweden. Ecology and Society 16(4): 27. https://doi.org/10.5751/ES-04394-160427
Assessing human effects on the Baltic Sea ecosystem
Baltic Sea ecosystem-based management under climate change
Baltic Sea ecosystem-based management under climate change : Integrating social and ecological perspectives
Adaptive Coastal Planning and the European Union's Water Framework Directive
The implementation of the EU Water Framework Directive and the achievement of its water quality objectives will to a large degree depend on scientific knowledge about the sources and status of water resources and the effects of mitigative measures. Coastal waters will be of central interest, since the management of whole river basins may be affected if coastal water status is not satisfactory. The Water Directive's general directions on what info…
Understanding Human Impact on the Baltic Ecosystem
Grave environmental problems, including contamination of biota by organochlorines and heavy metals, and increasing deep-water oxygen deficiency, were discovered in the Baltic Sea in the late 1960s. Toxic pollutants, including the newly discovered PCB, were initially seen as the main threat to the Baltic ecosystem, and the impaired reproduction found in Baltic seals and white-tailed eagles implied a threat also to human fish eaters. Countermeasure…
Understanding Human Impact on the Baltic Ecosystem
Grave environmental problems, including contamination of biota by organochlorines and heavy metals, and increasing deep-water oxygen deficiency, were discovered in the Baltic Sea in the late 1960s. Toxic pollutants, including the newly discovered PCB, were initially seen as the main threat to the Baltic ecosystem, and the impaired reproduction found in Baltic seals and white-tailed eagles implied a threat also to human fish eaters. Countermeasure…
Adaptive Coastal Planning and the European Union's Water Framework Directive
The implementation of the EU Water Framework Directive and the achievement of its water quality objectives will to a large degree depend on scientific knowledge about the sources and status of water resources and the effects of mitigative measures. Coastal waters will be of central interest, since the management of whole river basins may be affected if coastal water status is not satisfactory. The Water Directive's general directions on what info…
Adaptive Coastal Planning and the European Union's Water Framework Directive
The implementation of the EU Water Framework Directive and the achievement of its water quality objectives will to a large degree depend on scientific knowledge about the sources and status of water resources and the effects of mitigative measures. Coastal waters will be of central interest, since the management of whole river basins may be affected if coastal water status is not satisfactory. The Water Directive's general directions on what info…
Participatory Social-Ecological Modeling in Eutrophication Management
Franzén, F., G. Kinell, J. Walve, R. Elmgren, and T. Söderqvist 2011. Participatory Social-Ecological Modeling in Eutrophication Management: the case of Himmerfjärden, Sweden. Ecology and Society 16(4): 27. https://doi.org/10.5751/ES-04394-160427
A Systems Approach Framework for the Transition to Sustainable Development
Hopkins , T. S., D. Bailly, R. Elmgren, G. Glegg, A. Sandberg, and J. G. Støttrup. 2012. A systems approach framework for the transition to sustainable development: potential value based on coastal experiments. Ecology and Society 17(3): 39. https://doi.org/10.5751/ES-05266-170339
Baltic Sea management
Severe environmental problems documented in the Baltic Sea in the 1960s led to the 1974 creation of the Helsinki Convention for the Protection of the Marine Environment of the Baltic Sea Area. We introduce this special issue by briefly summarizing successes and failures of Baltic environmental management in the following 40 years. The loads of many polluting substances have been greatly reduced, but legacy pollution slows recovery. Top predator p…
Nitrogen fixation by cyanobacteria stimulates production in Baltic food webs
Filamentous, nitrogen-fixing cyanobacteria form extensive summer blooms in the Baltic Sea. Their ability to fix dissolved N2 allows cyanobacteria to circumvent the general summer nitrogen limitation, while also generating a supply of novel bioavailable nitrogen for the food web. However, the fate of the nitrogen fixed by cyanobacteria remains unresolved, as does its importance for secondary production in the Baltic Sea. Here, we synthesize recent…
Baltic Sea ecosystem-based management under climate change
Baltic Sea ecosystem-based management under climate change : Integrating social and ecological perspectives
Projected future climate change and Baltic Sea ecosystem management
Climate change is likely to have large effects on the Baltic Sea ecosystem. Simulations indicate 2-4 °C warming and 50-80 % decrease in ice cover by 2100. Precipitation may increase ~30 % in the north, causing increased land runoff of allochthonous organic matter (AOM) and organic pollutants and decreased salinity. Coupled physical-biogeochemical models indicate that, in the south, bottom-water anoxia may spread, reducing cod recruitment and incr…
Baltic Sea ecosystem-based management under climate change
Ecosystem-based management (EBM) has emerged as the generally agreed strategy for managing ecosystems, with humans as integral parts of the managed system. Human activities have substantial effects on marine ecosystems, through overfishing, eutrophication, toxic pollution, habitat destruction, and climate change. It is important to advance the scientific knowledge of the cumulative, integrative, and interacting effects of these diverse activities…
Assessing human effects on the Baltic Sea ecosystem
How oxygen deficiency in the Baltic Sea proper has spread and worsened
Even large inflows of oxygen-rich seawater to the Baltic Proper have in recent decades given only short-lived relief from oxygen deficiency below the halocline. We analyse long-term changes in oxygen deficiency, and calculate the “total oxygen debt” $$\Sigma$$ Σ OD, the oxygen required to oxidize the hydrogen sulphide (H 2 S) and ammonium (NH 4 ) that builds up during stagnation periods. Since the early 1990s, oxygen below 65m has gradually decre…
Environmental Science (12 works) · Ecology (9 works) · Environmental resource management (9 works) · Oceanography (9 works) · Ecology (8 works) · Ecosystem (8 works) · Oceanography (8 works) · Baltic sea (7 works) · Biology (7 works) · Coastal and Marine Management (7 works)