Browsing by Autor "Dennis Trolle"

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    Biomanipulation as a Restoration Tool to Combat Eutrophication
    (Elsevier BV, 2012) Erik Jeppesen; Martin Søndergaard; Torben L. Lauridsen; Thomas A. Davidson; Zhengwen Liu; Néstor Mazzeo; Carolina Trochine; Korhan Özkan; Henning S. Jensen; Dennis Trolle
    Eutrophication resulting from high nutrient loading has been the paramount environmental problem for lakes world-wide for the past four decades. Efforts are being made in many parts of the world to reduce external nutrient loading via improved wastewater treatment or diversion of nutrient-rich inflows. However, even after a reduction of the external phosphorus loading, the effects obtained may be unsatisfactory. This may reflect an insufficient reduction in the external nutrient loading to effectively limit phytoplankton growth. However, the lack of success may also be due to chemical or biological within-lake inertia preventing or delaying improvements. To overcome the resilience and thereby reinforce recovery, a number of physico-chemical and biological restoration methods have been developed. In this chapter, we describe recent developments of biological restoration methods related to eutrophication, their short-term and long-term effects, and discuss the possibility of using combined physico-chemical and biological methods to improve the long-term stability of restoration and to reduce restoration costs. As comprehensive reviews of the effect of fish manipulation in cold temperate lakes are numerous, for these waterbodies, we highlight recent results, including effects on biodiversity and metabolism, and present new approaches of biomanipulation. Our particular focus is, however, directed at biomanipulation in warm lakes and on combined treatments which are far less well described in the literature.
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    Lake ecosystem models as support tools for managing shallow lakes - Benefits and challenges from a Danish perspective
    (2021) Tobias Kuhlmann Andersen; Nicolas Azaña Schnedler‐Meyer; Fenjuan Hu; Anders Nielsen; Karsten Bolding; Dennis Trolle
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    Open source 3D modellering af Horsens fjord med pyGETM
    (2023) Dennis Trolle; Tobias Kuhlmann Andersen; Anders Nielsen; Hans Thodsen; Henrik Tornbjerg; Jorn Bruggeman; Karsten Bolding
    Notatet redegør for opsætning og test af den hydrodynamiske General Estuarine <br/>Transport Model (pyGETM) for Horsens fjord.