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Obituary: Brian Moss (1943–2016)

limnology. This was followed by a stay in Michigan, USA, where he worked on a large-scale experimental lake system, investigating the role of carbon in phytoplankton ecology and the impacts - Erik Jeppesen ... Brian Moss' large scientific family and their many offspring: Tom Barker , Meryem Bekliog ̆lu, Laurence Carvalho, Jane Fisher, Lars-Anders Hansson, Haseeb Irfanullah, Kenneth Irvine, Cassie James, Erik

Nutrient availability limits biological production in Arctic sea ice melt ponds

Every spring and summer melt ponds form at the surface of polar sea ice and become habitats where biological production may take place. Previous studies report a large variability in the productivity, but the causes are unknown. We investigated if nutrients limit the productivity in these first-year ice melt ponds by adding nutrients to three enclosures ([1] PO4 3−, [2] NO3 −, and ...

Ecosystem change in the large and shallow Lake Säkylän Pyhäjärvi, Finland, during the past ~400 years: implications for management

solely on monitoring data. Acknowledgements Erik Jeppesen, Martin Søndergaard, Liselotte Sander Johansson and Susanne Lildal Amsinck were supported by the MARS project (Managing Aquatic ecosystems and

Regime Shifts in Shallow Lakes

Marten Scheffer 1 Erik Jeppesen 0 0 Department of Freshwater Ecology, National Environmental Research Institute , Vejlsvej 25, 8600, Silkeborg, Denmark 1 Aquatic Ecology and Water Quality Management

Exploring, exploiting and evolving diversity of aquatic ecosystem models: a community perspective

Here, we present a community perspective on how to explore, exploit and evolve the diversity in aquatic ecosystem models. These models play an important role in understanding the functioning of aquatic ecosystems, filling in observation gaps and developing effective strategies for water quality management. In this spirit, numerous models have been developed since the 1970s. We set ...

Effects of Temperature, Salinity and Fish in Structuring the Macroinvertebrate Community in Shallow Lakes: Implications for Effects of Climate Change

Climate warming may lead to changes in the trophic structure and diversity of shallow lakes as a combined effect of increased temperature and salinity and likely increased strength of trophic interactions. We investigated the potential effects of temperature, salinity and fish on the plant-associated macroinvertebrate community by introducing artificial plants in eight comparable ...

The impact of metazooplankton on the structure of the microbial food web in a shallow, hypertrophic lake

Klaus Jrgens 1 Erik Jeppesen 0 0 National Environmental Research Institute , PO Box 314, DK-8600 Silkeborg , Denmark 1 Max Planck Institute of Limnology , PO Box 165, D-24302 Plon , Germany Shallow

Effects of Submerged Vegetation on Water Clarity Across Climates

data, contributed new methods, and wrote paper. Gissell Lacerot, Erik Jeppesen, David da Motta Marques, Egbert H. van Nes, Nestor Mazzeo, and Marten Scheffer par- ticipated in field campaign, contributed

Influence of nutrients, submerged macrophytes and zooplankton grazing on phytoplankton biomass and diversity along a latitudinal gradient in Europe

In order to evaluate latitudinal differences in the relationship of phytoplankton biomass and diversity with environmental conditions in shallow lakes, we sampled 98 shallow lakes from three European regions: Denmark (DK), Belgium/The Netherlands (BNL) and southern Spain (SP). Phytoplankton biomass increased with total phosphorus (TP) concentrations and decreased with submerged ...

The importance of macrophyte bed size for cladoceran composition and horizontal migration in a shallow lake

Cladoceran composition and diel horizontal migration were studied in 2, 10 and 25 m diameter macrophyte exclosures established in the littoral zone of shallow Lake Stigsholm, Denmark. The exclosures were protected from waterfowl grazing, but open to fish. The macrophyte community cornprized Potwnogeton pectinatus, Potamogeton pusillus and Callitriche hemaphroditica. Cladocerans ...

Trophic structure in the pelagial of 25 shallow New Zealand lakes: changes along nutrient and fish gradients

To gain better insight into the importance of predator and resource control in New Zealand lakes we surveyed the late summer trophic structure of 25 shallow South Island lakes with contrasting nutrient levels (6–603 μg TP l–1) and fish densities. Total catch of fish per net (CPUE) in multi-mesh gillnets placed in the open water and the littoral zones was positively related with the ...

Challenges and opportunities for integrating lake ecosystem modelling approaches

A large number and wide variety of lake ecosystem models have been developed and published during the past four decades. We identify two challenges for making further progress in this field. One such challenge is to avoid developing more models largely following the concept of others (‘reinventing the wheel’). The other challenge is to avoid focusing on only one type of model, ...

Fish-induced changes in zooplankton grazing on phytoplankton and bacterioplankton: a long-term study in shallow hypertrophic Lake Søbygaard

-8600 Silkeborg , Denmark 1 National Environmental Research Institute, Department of Lake and Estuarine 2 Erik Jeppesen , Martin S0ndergaard, Jens Peder Jensen, Erik Mortensen and Ole The impact of fish ... conditions Daphnia dominate the zooplankton community. Sortkjaer Erik Jeppesen, Martin S0ndergaard, Jens Peder Jensen, Erik Mortensen and Ole National Environmental Research Institute, Department of Lake and