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During the last decades there has been a steadily increasing flow of reports on declining and even collapsed fisheries in many parts of the world (e.g., Myers and Worm, 2005), from the well known cod disaster along the Canadian Atlantic coast, the well documented fishery problems in the Black Sea (Zaitsev and Mamaev, 1997) to the overfishing in the Baltic Sea and the Kattegat/Skagerrak (see, e.g.,...
The size and form of a given aquatic system, i.e., the morphometry, influences the way in which the system functions, since the depth-characteristics influence resuspension and internal loading of nutrients, the nutrient concentrations regulate the primary production, which in turn regulates the secondary production, including zooplankton and fish (see Håkanson and Boulion, 2002a).
The aim of this chapter is to present the basic structure of the CoastWeb-model. Most of the structures and equations for the coastal version of the model are the same as for the LakeWeb-model (see Håkanson and Boulion, 2002a), but there are also differences related to the transformation of a lake model to a model for the entire Baltic Sea. It is certainly important which organisms and processes are...
The aim of this chapter can be stated in one short and simple sentence: It is to present all details related to the understanding and modeling of all functional groups of organisms in the CoastWeb-model. It is, however, difficult to make this presentation short and simple, but we will try.
This chapter will present several scenarios, which are meant to focus on key problems related to sustainable Baltic Sea management. The last scenario will put many of the results in this book together and discuss a management plan for the Baltic Sea, which also includes a cost-benefit analysis. The first scenario is similar to the one presented by Håkanson and Bryhn (2008b). It concerns a strategy...
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