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African papyrus (Cyperus papyrus L.) wetlands provide water, food
and materials to millions of people, and perform important
landscape functions such as water and nutrient storage, habitat
provision for fish, birds and other wildlife. They are also an
integral part of the culture of African wetland communities. With
an increasing demand for food, papyrus wetlands are at risk of
conversion to agriculture and losing these ecosystem services.
Combining increased agricultural production with wetland
conservation is urgently needed. The research presented in this
book consisted of two parts. First, field experiments investigated
nitrogen and phosphorus retention, showing that papyrus grows
faster with disturbance from human activities or flooding, but
produces less biomass and stores less nutrients. Then, a dynamic
simulation model (Papyrus Simulator) based on the hydrological and
ecological wetland processes showed that assimilation, mortality,
decay, re-translocation, nutrient inflow and soil porosity were the
most influential factors. The model demonstrated that controlled
harvesting can increase nutrient retention by up to 40%, but
overharvesting leads to the release of nutrients. These findings
can help determining optimum harvesting strategies for constructed
and natural wetlands, and contribute to the quantification of
ecosystem services and an evidence-based adaptive management
approach for African wetland landscapes.
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