1. Department of Social Sciences, Pwani University, Kilifi P.O. Box 195-80108, Kenya
2. Department of Oceanography and Hydrography, Kenya Marine and Fisheries Research Institute, Mombasa P.O. Box 81651-80100, Kenya
3. Laboratory of Plant Biology and Nature Management, Ecology and Biodiversity, Vrije Universiteit Brussel—VUB, Laarbeeklaan 103, B-1090 Brussels, Belgium
4. Department of Environmental Sciences, Open University of The Netherlands, P.O. Box 2960, 6401 DL Heerlen, The Netherlands
5. Centre for Environmental Sciences, Hasselt University Gebouw D, B-3590 Hasselt, Belgium
6. Systems Ecology and Resource Management, Department of Organism Biology, Université Libre de Bruxelles (ULB), Avenue F.D. Roosevelt 50, CPi 264/1, B-1050 Brussels, Belgium
7. Marine Biology Research Group, Universiteit Gent, Krijgslaan 281—S8, B-9000 Gent, Belgium
8. Centre for Environmental Sciences (CMK), Universiteit Hasselt, Agoralaan z/n, B-3590 Diepenbeek, Belgium