Publications

Ecological thresholds: a survey. Is It Time to Bury the Ecosystem Concept? (With Full Military Honors of Course!). Multiplicity of Stable States in Fresh-Water Systems. Catastrophic Shifts in Ecosystems. Indirect Effects of Fish Community Structure on Submerged Vegetation in Shallow, Eutrophic Lakes - an Alternative Mechanism. How Important Is the Crustacean Plankton for the Maintenance of Water Clarity in Shallow Lakes With Abundant Submerged Vegetation? Changes in a Deep Lake Following Sewage Diversion - a Challenge to the Orthodoxy of External Phosphorus Control as a Restoration Strategy. Trophic Dynamics in Turbid and Clearwater Lakes With Special Emphasis on the Role of Zooplankton for Water Clarity. Trophic Structure, Species Richness and Biodiversity in Danish Lakes: Changes Along a Phosphorus Gradient. Changes in Nitrogen Retention in Shallow Eutrophic Lakes Following a Decline in Density of Cyprinids. Top-Down Control in Freshwater Lakes: the Role of Nutrient State, Submerged Macrophytes and Water Depth. Cascading Trophic Interactions in the Littoral Zone: an Enclosure Experiment in Shallow Lake Stigsholm, Denmark. Cascading Trophic Interactions From Fish to Bacteria and Nutrients After Reduced Sewage Loading: an 18-Year Study of a Shallow Hypertrophic Lake. Lake and Catchment Management in Denmark. Summer Internal Phosphorus Supplies in Shagawa Lake, Minnesota. Colonization of Submerged Macrophytes in Shallow Fish Manipulated Lake Vaeng - Impact of Sediment Composition and Waterfowl Grazing. Colonization and Succession of Submerged Macrophytes in Shallow Lake Vaeng During the 1st 5 Years Following Fish Manipulation. Biomanipulation in Shallow Lakes in the Netherlands: an Evaluation of 18 Case Studies. Effects of Biomanipulation in the Large and Shallow Lake Wolderwijd, the Netherlands. Long-Term Responses to Fish-Stock Reduction in Small Shallow Lakes - Interpretation of 5-Year Results of 4 Biomanipulation Cases in the Netherlands and Denmark. Primary Production in a Shallow Eutrophic Lake Dominated Alternately by Phytoplankton and by Submerged Macrophytes. The Art of Lake Restoration. Engineering and Biological Approaches to the Restoration From Eutrophication of Shallow Lakes in Which Aquatic Plant- Communities Are Important Components. Restoration of Two Lowland Lakes by Isolation From Nutrient-Rich Water Sources With and Without Removal of Sediment. Development of Daphnid Communities in Diatom-Dominated and Cyanophyte-Dominated Lakes and Their Relevance to Lake Restoration by Biomanipulation. Progressive Restoration of a Shallow Lake: a 12-Year Experiment in Isolation, Sediment Removal and Biomanipulation. Mass Mortality of the Tropical Seagrass Thalassia-Testudinum in Florida Bay (USA). Fish and Nutrients Interplay Determines Algal Biomass - a Minimal Model. Should We Expect Strange Attractors Behind Plankton Dynamics - and if So, Should We Bother. Megaplant - a Simulation-Model of the Dynamics of Submerged Plants. Implications of Spatial Heterogeneity for the Paradox of Enrichment. Distribution and Dynamics of Submerged Vegetation in a Chain of Shallow Eutrophic Lakes. Alternative Equilibria in Shallow Lakes. Minimal Models of Top-Down Control of Phytoplankton. On the Dominance of Filamentous Cyanobacteria in Shallow, Turbid Lakes. Effects of Fish on Plankton Dynamics: a Theoretical Analysis. Seasonal Dynamics of Daphnia and Algae Explained as a Periodically Forced Predator-Prey System. Vegetated Areas With Clear Water in Turbid Shallow Lakes. Impact of Submerged Macrophytes on Fish-Zooplankton- Phytoplankton Interactions - Large-Scale Enclosure Experiments in a Shallow Eutrophic Lake. Is Trophic State or Regional Location the Strongest Determinant for Chl-a/Tp Relationships in Lakes? The Impact of Grazing Waterfowl on Submerged Macrophytes: in Situ Experiments in a Shallow Eutrophic Lake. Internal Phosphorus Loading in Shallow Danish Lakes. Pike (Esox Lucius L) Stocking as a Biomanipulation Tool .2. Effects on Lower Trophic Levels in Lake Lyng, Denmark. Interactions Between Sediment and Water in a Shallow and Hypertrophic Lake - a Study on Phytoplankton Collapses in Lake Sobygard, Denmark. Phytoplankton Biomass Reduction After Planktivorous Fish Reduction in a Shallow, Eutrophic Lake - a Combined Effect of Reduced Internal P-Loading and Increased Zooplankton Grazing. Wave Exposure Related Growth of Epiphyton: Implications for the Distribution of Submerged Macrophytes in Eutrophic Lakes. Managing Nutrient Fluxes and Pollution in the Baltic: an Interdisciplinary Simulation Study. The Role of Characean Algae in the Management of Eutrophic Shallow Lakes. Dynamics and Stability of Chara Sp and Potamogeton Pectinatus in a Shallow Lake Changing in Eutrophication Level. Dominance of Charophytes in Eutrophic Shallow Lakes - When Should We Expect It to Be an Alternative Stable State? The Relation Between Wave Exposure and Distribution of Emergent Vegetation in a Eutrophic Lake. Mechanisms Regulating Abundance of Submerged Vegetation in Shallow Eutrophic Lakes. Changes in the Aquatic Vegetation of 2 Gravel Pit Lakes After Reducing the Fish Population-Density. Catastrophic Response of Lakes to Benthivorous Fish Introduction. Nitrogen Loss and Denitrification as Studied in Relation to Reductions in Nitrogen Loading in a Shallow, Hypertrophic Lake (Lake Sobygard, Denmark). Impact of Nutrients and Physical Factors on the Shift From Cyanobacterial to Chlorophyte Dominance in Shallow Danish Lakes. Can Simple Empirical Equations Describe the Seasonal Dynamics of Bacterioplankton in Lakes: an Eight-Year Study in Shallow Hypertrophic and Biologically Highly Dynamic Lake Sobygard, Denmark. Reconstructing the Historical Changes in Daphnia Mean Size and Planktivorous Fish Abundance in Lakes From the Size of Daphnia Ephippia in the Sediment. Fish Manipulation as a Lake Restoration Tool in Shallow, Eutrophic, Temperate Lakes .2. Threshold Levels, Long-Term Stability and Conclusions. Fish-Induced Changes in Zooplankton Grazing on Phytoplankton and Bacterioplankton: a Long-Term Study in Shallow Hypertrophic Lake Sobygaard. Does the Impact of Nutrients on the Biological Structure and Function of Brackish and Fresh-Water Lakes Differ. Nutrient Dynamics and Biological Structure in Shallow Fresh- Water and Brackish Lakes - Preface. Fish Manipulation as a Lake Restoration Tool in Shallow, Eutrophic Temperate Lakes .1. Cross-Analysis of 3 Danish Case- Studies. Interactions Between Phytoplankton, Zooplankton and Fish in a Shallow, Hypertrophic Lake - a Study of Phytoplankton Collapses in Lake Sobygard, Denmark. The Baltic: The Sea of Surprises. In: Barriers and bridges to the renewal of ecosystems and institutuins. Biomanipulation in the Netherlands: 15 years of experience. Phytoplankton community composition can be predicted best in terms of morphological groups Ambiguous climate impacts on the competition between submerged macrophytes and phytoplankton in shallow lakes Phytoplankton species predictability increases towards warmer regions Seasonal Changes of Mechanisms Maintaining Clear Water in a Shallow Lake With Abundant Chara Vegetation. Management of Eutrophication for Lakes Subject to Potentially Irreversible Change. Recovery of the Macrozoobenthic Community of the Comacchio Lagoon System (Northern Adriatic Sea). Overview of Hypoxia Around the World. Epilithic Biomass and Metabolism in a North Iberian Stream. Top-Down Control of Cyanobacteria: a Theoretical Analysis. Catastrophes, Phase Shifts, and Large-Scale Degradation of a Caribbean Coral Reef. Resuspension in a Shallow Eutrophic Lake. A Fuzzy Logic Model to Predict Coral Reef Development Under Nutrient and Sediment Stress. Ecological Goods and Services of Coral Reef Ecosystems. Effects on Nutrients and Hydroperiod on Typha, Cladium, and Eleocharis: Implications for Everglades Restoration. Spatial Resilience of Coral Reefs. Coral Reef Disturbance and Resilience in a Human-Dominated Environment. Corals and Phase Shifts. Alternate Stable States and Threshold Effects in Semi-Arid Grazing Systems. The Sahel of Africa: Ecology of a Disaster. 8 Years of Internal Phosphorus Loading and Changes in the Sediment Phosphorus Profile of Lake Sobygaard, Denmark. Phosphorus Release From Resuspended Sediment in the Shallow and Wind-Exposed Lake Arreso, Denmark. Phosphorus Fractions and Profiles in the Sediment of Shallow Danish Lakes as Related to Phosphorus Load, Sediment Composition and Lake Chemistry. Experimental Policies for Water Management in the Everglades. Coexistence and Collapse: an Experimental Investigation of the Persistent Communities of a Protist Species Pool. Global and Local Threats to Coral Reef Functioning and Existence: Review and Predictions. Steppe-tundra transition: a herbivore-driven biome shift at the end of the pleistocene. Threats to Sustainability in Intensified Agricultural Systems: Analysis and Implications for Management. Long-Term Pattern of Alternative Stable States in 2 Shallow Eutrophic Lakes. Long-Term and Short-Term Dynamics of Submerged Macrophytes in 2 Shallow Eutrophic Lakes. Decline of Charophytes During Eutrophication - Comparison With Angiosperms. Pike (Esox Lucius L) Stocking as a Biomanipulation Tool .1. Effects on the Fish Population in Lake Lyng, Denmark. Integrating Salmon, Trees and People: Watershed Management: Balancing Sustainability and Environmental Change. The Costs of Eutrophication From Salmon Farming - Implications for Policy. Effects of Interdecadal Climate Variability on the Oceanic Ecosystems of the Ne Pacific. Differences in the ecology of wet-dug and dry-dug gravel pit lakes. Collapse and Recovery of Marine Fishes. What Can Be Learned From the Collapse of a Renewable Resource - Atlantic Cod, Gadus-Morhua, of Newfoundland and Labrador. Life After Death in Lake Erie: Nutrient Controls Drive Fish Species Richness, Rehabilitation. Implications of the Effects of Trawling on Sessile Megazoobenthos on a Tropical Shelf in Northeastern Australia. The Impact of Pelagic Fish Behavior on Fisheries. Middle Paleozoic Extinction Events - Faunal and Isotopic Data. Cultivation/Depensation Effects on Juvenile Survival and Recruitment: Implications for the Theory of Fishing. Relationships Between Fisheries and the Integrity of River Systems. Discovery of Fish Mortality Horizon at the K-T Boundary on Seymour Island: Re-Evaluation of Events at the End of the Cretaceous. Mass Mortalities and Mass Extinction. The impact of low-head dams on fish species richness in Wisconsin, USA. Climatic Warming Causes Regime Shifts in Lake Food Webs. Ecological and social dynamics in simple models of ecosystem managment Ecological and Social Dynamics in Simple Models of Ecosystem Management. Coping With Collapse: Ecological and Social Dynamics in Ecosystem Management. Multiple States in River and Lake Ecosystems. Seasonality and Chaos in a Plankton Fish Model. Persistent Unstable Equilibria and the Grace Period in Dynamic Models of Environmental Change. Assessing the Role of Deep Rooted Vegetation in the Climate System With Model Simulations: Mechanism, Comparison to Observations and Implications for Amazonian Deforestation. Deep-Rooted Vegetation, Amazonian Deforestation, and Climate: Results From a Modelling Study. Metapopulation Models for Extinction Threshold in Spatially Correlated Landscapes. Ecological Resilience, Biodiversity, and Scale. Persistence of 2 Species of Gecko (Oedura-Reticulata and Gehyra-Variegata) in Remnant Habitat. Multispecies Cropping Systems in India - Predictions of Their Productivity, Stability, Resilience and Ecological Sustainability. Rangeland Ecology - Understanding and Managing Change. Resilience of an Australian Savanna Grassland to Selective and Non-Selective Perturbations. Stability of semiarid svanna grazing systems. Extinction and Spatial Structure in Simulation Models. Demographic Stochasticity Does Not Predict Persistence of Gecko Populations. A Universal Law of the Characteristic Return Time Near Thresholds. Critical Thresholds in Species Responses to Landscape Structure. Dispersal Success on Fractal Landscapes: a Consequence of Lacunarity Thresholds. Extinction Thresholds for Species in Fractal Landscapes. Alternative attractors may boost uncertainty and sensitivity in ecological models Uncertainty in Discount Models and Environmental Accounting. Why Model? Desertification of Subtropical Thicket in the Eastern Cape, South Africa: Are There Alternatives? Diversity and stability in ecosystem conservation. Grazing management, resilience and the dynamics of a fire driven rangeland system Grazing Effects on Patchy Dryland Vegetation in Northern Patagonia. Grazing Management, Resilience, and the Dynamics of a Fire- Driven Rangeland System. Range Condition Assessment and the Concept of Thresholds - a Viewpoint. Shrub clumps of the Chilean matorral vegetation: structure and possible maintenance mechanisms. El Nino Effects on the Dynamics of Terrestrial Ecosystems. Desertification in Australia: an Eye to Grass Roots and Landscapes. South Africa's Arid and Semiarid Rangelands: Why Are They Changing and Can They Be Restored? Biodiversity, Resilience and the Control of Ecological-Economic Systems: the Case of Fire-Driven Rangelands. Spatial Heterogeneity and Irreversible Vegetation Change in Semiarid Grazing Systems. Catastrophic vegetation shifts and soil degradation in terrestrial grazing systems. Desertification in Russia: Problems and Solutions (an Example in the Republic of Kalmykia-Khalmg Tangch). Stability Properties Of Semiarid Savannas In Southern African Game Reserves. Stress, Disturbance and Change in Rangeland Ecosystems.