Jan De Leeuw | World Agroforestry Centre (original) (raw)
Jan de Leeuw has worked in higher education and research in environmental science in a wide variety of environments around the world. He is now research team leader at ILRI in Nairobi, leading research on vulnerability in pastoral systems.
The research of Jan de Leeuw, which initially focussed on plant ecology, eco-hydrology and vegetation monitoring, broadened over the years to long term ecological research and environmental assessment and the application of earth observation in mapping and monitoring of environmental change. Later he developed interest in the contribution of geo-informatics and earth observation to support environmental policies.
The current work at ILRI builds on this, while studying pastoral livelihood systems and the impact of policies and drought relief and mitigating interventions in reducing vulnerabilities in these systems.
less
Uploads
Papers by Jan De Leeuw
by Fanon Ananda, Jan Vandenabeele, Josephine KIrui, Kenneth Mwangi, Maureen Kinyanjui, Yuko Kurauchi, Alice Muchugi, Chrispinus Rubanza, Ali Mohd, Anton Vrieling, Mick O'Neill, uriel safriel, Mieke Bourne, Jules Bayala (ICRAF), Audrey Chenevoy, Benjamin Kibor, Masumi Gudka, Anthony Kimaro, Betty Rabar, emiru birhane, Jan De Leeuw, Mary Njenga, Samson Gwali, and Betserai Isaac Nyoka
The provision of food to breeding and migrating waterfowl is one of the major functions of submer... more The provision of food to breeding and migrating waterfowl is one of the major functions of submerged aquatic vegetation in shallow lakes. Vallisneria spiralis L. is a submerged aquatic plant species widely distributed within Jiangxi Poyang Lake National Nature Reserve, China. More than 95% of the world population of the endangered Siberian crane as well as significant numbers of Bewick's swan and swan goose over winter in this area, while foraging on the tubers of Vallisneria.
ABSTRACT The wetlands of the Volga River delta have been designated wetlands of international imp... more ABSTRACT The wetlands of the Volga River delta have been designated wetlands of international importance and include the protected areas of the Astrakhanskiy Biosphere Reserve (Zapovednik (. Space photographs help document the effects of sea-level change in the Caspian Sea on the vegetation of the delta and on habitat suitability for waterbirds and mammals. The dramatic increase in vegetation that accompanied the most recent regression (until 1978l attracted great flocks of birds that nested and/or wintered in the area.
Page 1. 1 Do termites enhance the invasion of southern African savannas by alien plants? Mhosisi ... more Page 1. 1 Do termites enhance the invasion of southern African savannas by alien plants? Mhosisi Masocha; Andrew. K. Skidmore; Herbert HT Prins; Milena Holmgren; & Jan de Leeuw Page 2. 2 A plant community becomes more prone to alien plant invasions if the amount of unused resources increases Davis, MA, Grime, JP, & Thompson, K. 2000. Journal of Ecology, 88, 528-534. Page 3.
Abstract Livestock is considered a pathway out of poverty for poor small holder farmers in the de... more Abstract Livestock is considered a pathway out of poverty for poor small holder farmers in the developing world. Livestock production systems deliver benefits that have an effect on human wellbeing, by interacting with different ecosystems and their components. While generating these benefits to people, livestock produce negative environmental externalities.
Ericksen, P., Leeuw, J. de and Herrero, M. 2011. Harnessing livestock resources for food security... more Ericksen, P., Leeuw, J. de and Herrero, M. 2011. Harnessing livestock resources for food security in the pastoral areas of Eastern and Central Africa. Paper prepared for the 1st ASARECA General Assembly, Entebbe, Uganda, 14-16 December 2011. Entebbe, Uganda: ASARECA.
Go to AGRIS search. Try it!
Information on the spatial distribution of grass communities in wetland is increasingly recognize... more Information on the spatial distribution of grass communities in wetland is increasingly recognized as important for effective wetland management and biological conservation. Remote sensing techniques has been proved to be an effective alternative to intensive and costly ground surveys for mapping grass community. However, the mapping accuracy of grass communities in wetland is still not preferable. The aim of this paper is to develop an effective method to map grass communities in Poyang Lake Natural Reserve.
Coping with drought and climate change in the pastoral sector in Sub-Saharan Africa: Policy consi... more Coping with drought and climate change in the pastoral sector in Sub-Saharan Africa: Policy considerations.
Go to AGRIS search. Try it!
by Fanon Ananda, Jan Vandenabeele, Josephine KIrui, Kenneth Mwangi, Maureen Kinyanjui, Yuko Kurauchi, Alice Muchugi, Chrispinus Rubanza, Ali Mohd, Anton Vrieling, Mick O'Neill, uriel safriel, Mieke Bourne, Jules Bayala (ICRAF), Audrey Chenevoy, Benjamin Kibor, Masumi Gudka, Anthony Kimaro, Betty Rabar, emiru birhane, Jan De Leeuw, Mary Njenga, Samson Gwali, and Betserai Isaac Nyoka
The provision of food to breeding and migrating waterfowl is one of the major functions of submer... more The provision of food to breeding and migrating waterfowl is one of the major functions of submerged aquatic vegetation in shallow lakes. Vallisneria spiralis L. is a submerged aquatic plant species widely distributed within Jiangxi Poyang Lake National Nature Reserve, China. More than 95% of the world population of the endangered Siberian crane as well as significant numbers of Bewick's swan and swan goose over winter in this area, while foraging on the tubers of Vallisneria.
ABSTRACT The wetlands of the Volga River delta have been designated wetlands of international imp... more ABSTRACT The wetlands of the Volga River delta have been designated wetlands of international importance and include the protected areas of the Astrakhanskiy Biosphere Reserve (Zapovednik (. Space photographs help document the effects of sea-level change in the Caspian Sea on the vegetation of the delta and on habitat suitability for waterbirds and mammals. The dramatic increase in vegetation that accompanied the most recent regression (until 1978l attracted great flocks of birds that nested and/or wintered in the area.
Page 1. 1 Do termites enhance the invasion of southern African savannas by alien plants? Mhosisi ... more Page 1. 1 Do termites enhance the invasion of southern African savannas by alien plants? Mhosisi Masocha; Andrew. K. Skidmore; Herbert HT Prins; Milena Holmgren; & Jan de Leeuw Page 2. 2 A plant community becomes more prone to alien plant invasions if the amount of unused resources increases Davis, MA, Grime, JP, & Thompson, K. 2000. Journal of Ecology, 88, 528-534. Page 3.
Abstract Livestock is considered a pathway out of poverty for poor small holder farmers in the de... more Abstract Livestock is considered a pathway out of poverty for poor small holder farmers in the developing world. Livestock production systems deliver benefits that have an effect on human wellbeing, by interacting with different ecosystems and their components. While generating these benefits to people, livestock produce negative environmental externalities.
Ericksen, P., Leeuw, J. de and Herrero, M. 2011. Harnessing livestock resources for food security... more Ericksen, P., Leeuw, J. de and Herrero, M. 2011. Harnessing livestock resources for food security in the pastoral areas of Eastern and Central Africa. Paper prepared for the 1st ASARECA General Assembly, Entebbe, Uganda, 14-16 December 2011. Entebbe, Uganda: ASARECA.
Go to AGRIS search. Try it!
Information on the spatial distribution of grass communities in wetland is increasingly recognize... more Information on the spatial distribution of grass communities in wetland is increasingly recognized as important for effective wetland management and biological conservation. Remote sensing techniques has been proved to be an effective alternative to intensive and costly ground surveys for mapping grass community. However, the mapping accuracy of grass communities in wetland is still not preferable. The aim of this paper is to develop an effective method to map grass communities in Poyang Lake Natural Reserve.
Coping with drought and climate change in the pastoral sector in Sub-Saharan Africa: Policy consi... more Coping with drought and climate change in the pastoral sector in Sub-Saharan Africa: Policy considerations.
Go to AGRIS search. Try it!