Coupled human and natural system dynamics as key to the sustainability of Lake Victoria's ecosystem services
| Autor: | Downing, A.S., Nes, E.H. van, Balirwa, J.S., Beuving, J.J., Bwathondi, P.O.J., Chapman, L.J., Cornelissen, I.J.M., Cowx, I.G., Goudswaard, K.P.C., Hecky, R.E., Janse, J.H., Janssen, A.B.G., Kaufman, L., Kishe-Machumu, M.A., Kolding, J., Ligtvoet, W., Mbabazi, D., Medard, M., Mkumbo, O.C., Mlaponi, E., Munyaho, A.T., Nagelkerke, L.A.J., Ogutu-Ohwayo, R., Ojwang, W.O., Peter, H.K., Schindler, D.E., Seehausen, O., Sharpe, D., Silsbe, G.M., Sitoki, L., Tumwebaze, R., Tweddle, D., Wolfshaar, K.E. van de, Dijk, J.W.M. van, Donk, E. van, Rijssel, J.C. van, Zwieten, P.A.M. van, Wanink, J., Witte, F., Mooij, W.M. |
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| Přispěvatelé: | Aquatic Ecology (AqE), Sub Ecology and Biodiversity, Ecology and Biodiversity |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
INTRODUCED PREDATOR
Aquatic Ecology and Water Quality Management oreochromis-niloticus QH301-705.5 WASS WATER HYACINTH Lake Victoria MWANZA GULF MORPHOLOGICAL-CHANGES Aquaculture and Fisheries social-ecological system NILE PERCH EAST-AFRICA Biology (General) CYPRINID RASTRINEOBOLA-ARGENTEA multidisciplinary social-ecological system QH540-549.5 model Ecology biological-control Aquacultuur en Visserij Aquatische Ecologie en Waterkwaliteitsbeheer sustainability introduced predator Wageningen Marine Research perch lates-niloticus OREOCHROMIS-NILOTICUS eutrophication Vis Delta international fisheries PERCH LATES-NILOTICUS morphological-changes WIAS Sociology of Development and Change 570 Life sciences biology mwanza gulf nile perch Sociologie van Ontwikkeling en Verandering Anthropology and Development Studies water hyacinth BIOLOGICAL-CONTROL cyprinid rastrineobola-argentea east-africa multidisciplinary feedbacks |
| Zdroj: | Ecology and Society, Vol 19, Iss 4, p 31 (2014) Ecology and Society, 19(4) Ecology and Society, 19(4):31. The Resilience Alliance Ecology and Society, 19, 4 Ecology and Society 19 (2014) 4 Downing, Andrea S.; van Nes, Egbert H.; Balirwa, John S.; Beuving, Joost; Bwathondi, P.O.J.; Chapman, Lauren J.; Cornelissen, Ilse J. M.; Cowx, Iain G.; Goudswaard, Kees P. C.; Hecky, Robert E.; Janse, Jan H.; Janssen, Annette B. G.; Kaufman, Les; Kishe-Machumu, Mary A.; Kolding, Jeppe; Ligtvoet, Willem; Mbabazi, Dismas; Medard, Modesta; Mkumbo, Oliva C.; Mlaponi, Enock; ... (2014). Coupled human and natural system dynamics as key to the sustainability of Lake Victoria's ecosystem services. Ecology and Society, 19(4) Resilience Alliance Publications 10.5751/ES-06965-190431 Ecology and Society, 19 |
| ISSN: | 1708-3087 |
| DOI: | 10.5751/ES-06965-190431 |
| Popis: | Contains fulltext : 135031.pdf (Publisher’s version ) (Open Access) East Africa's Lake Victoria provides resources and services to millions of people on the lake's shores and abroad. In particular, the lake's fisheries are an important source of protein, employment, and international economic connections for the whole region. Nonetheless, stock dynamics are poorly understood and currently unpredictable. Furthermore, fishery dynamics are intricately connected to other supporting services of the lake as well as to lakeshore societies and economies. Much research has been carried out piecemeal on different aspects of Lake Victoria’s system; e.g., societies, biodiversity, fisheries, and eutrophication. However, to disentangle drivers and dynamics of change in this complex system, we need to put these pieces together and analyze the system as a whole. We did so by first building a qualitative model of the lake's social-ecological system. We then investigated the model system through a qualitative loop analysis, and finally examined effects of changes on the system state and structure. The model and its contextual analysis allowed us to investigate system-wide chain reactions resulting from disturbances. Importantly, we built a tool that can be used to analyze the cascading effects of management options and establish the requirements for their success. We found that high connectedness of the system at the exploitation level, through fisheries having multiple target stocks, can increase the stocks' vulnerability to exploitation but reduce society's vulnerability to variability in individual stocks. We describe how there are multiple pathways to any change in the system, which makes it difficult to identify the root cause of changes but also broadens the management toolkit. Also, we illustrate how nutrient enrichment is not a self-regulating process, and that explicit management is necessary to halt or reverse eutrophication. This model is simple and usable to assess system-wide effects of management policies, and can serve as a paving stone for future quantitative analyses of system dynamics at local scales. 18 p. |
| Databáze: | OpenAIRE |
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