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.
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.
This study of early sound shorts begins with an explanation of the development of sound motion pictures in Hollywood by such influential companies as Warner Bros. and Fox, with an emphasis on short subjects, leading up to the first few months when all of the major studios were capable of producing them. The next chapters discuss the impact on other mass entertainments, the development of audible news reels and other non-fiction shorts, as well as the origins of animated sound subjects. A comprehensive list of pre-1932 American-made shorts completes the volume.
STRONGA compact cornucopia of fascinating and hilarious revelations about all things Scottish—from monarchs and malts to tartans and TrainspottingSTRONG Covering all the need-to-knows, from bagpipes to Billy Connolly, this collection is the real McCoy, a comprehensive guide to Caledonia and its remarkable people. As the proud possessors of a fiercely independent creative heritage, the Scots were a race apart even before Hadrian built the wall. Scotland has produced an indomitable bunch of fighters, builders, thinkers and drinkers, poets, players, and pedagogues that have shaped the course of modern history. Edwin Moore has gathered together more than 1,000 facts about its monarchs, heroes, and rogues; battles, scandals, and great trials; food and (of course) drink; legends, folklore, and sports—for starters—and presents them here in easily digestible, scone-sized portions. This is the perfect gift for anyone curious about the connection between Homer Simpson and small Scottish town Larbert, or about whether both Barack Obama and John McCain can really be descended from a Scottish Lion.
Thank you for visiting our website. Would you like to provide feedback on how we could improve your experience?
This site does not use any third party cookies with one exception — it uses cookies from Google to deliver its services and to analyze traffic.Learn More.