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Hiernaux, Pierre H.Y.Diarra, L.[Pour une technique de teledetection appliquee au suivi de l'evolution de la vegetation sahelienne. Bilan des activities CIPEA dans le Gourma en 1985]Pour une technique de teledetection appliquee au suivi de l'evolution de la vegetation sahelienne. Bilan des activities CIPEA dans le Gourma en 1985

Evaluates relationship between NDVI (nomalized difference vegetation index) and above-ground biomass, between maximum NDVI and end-of-growing season biomass; and between the integral of the NDVI curve or NDVI increments overtime and actual biomass. Describes atmospheric interference and technical...


Hiernaux, Pierre H.Y.[Teledetection de l'evolution des ressources fourrageres par satellite: Progres dans l'etalonnage d'un indice radiometrique et premieres applications au Gourma (Sahel malien)]Teledetection de l'evolution des ressources fourrageres par satellite: Progres dans l'etalonnage d'un indice radiometrique et premieres applications au Gourma (Sahel malien)

Carbon assimilation defined as the overall rate of fixation of carbon through the process of photosynthesis is central to the climate change research. The present study compares the two well-known algorithms in satellite based carbon assimilation estimation, the Vegetation Photosynthesis Model (V...


Joseph, S.Laake, P. vanThomas, A.P.Eklundh, L.[Comparison of carbon assimilation estimates over tropical forest types in India based on different satellite and climate data products]Comparison of carbon assimilation estimates over tropical forest types in India based on different satellite and climate data products

Compte rendu de la mission CIPEA/NASA de reconnaissance dans la zone pastorale du Niger en vue de developper un programme d'alerte precoce. Propositions d'une typologie phytoecologique des parcours et d'une phase experimentale de developpement d'un systeme d'alerte precoce pastoral.


Hiernaux, Pierre H.Y.[Note sur les ressources fourrageres de la zone pastorale au Niger central, une reconnaissance de terrain et des propositions pour la mise en place d'un systeme d'alerte precoce experimental]Note sur les ressources fourrageres de la zone pastorale au Niger central, une reconnaissance de terrain et des propositions pour la mise en place d'un systeme d'alerte precoce experimental

The effect of grazing pressure on infiltration, runoff, and soil loss was studied on a natural pasture during the rainy season of 1995 in the Ethiopian highlands. The study was conducted at two sites with 0-4 percent and 4-8 percent slopes at the International Livestock Research Institute (ILRI) ...


Mwendera, E.J.Mohamed-Saleem, M.A.[Infiltration rates, surface runoff, and soil loss as influenced by grazing pressure in the Ethiopian highlands]Infiltration rates, surface runoff, and soil loss as influenced by grazing pressure in the Ethiopian highlands

The West African Sahel rainfall regime is known for its spatio-temporal variability at different scales which has a strong impact on vegetation development. This study presents results of the combined use of a simple water balance model, a radiative transfer model and ERS scatterometer data to ...


Jarlan, L.Mazzega, P.Mougin, E.Lavenu, F.Marty, G.Frison, P.L.Hiernaux, Pierre H.Y.[Mapping of Sahelian vegetation parameters from ERS scatterometer data with an evolution strategies algorithm]Mapping of Sahelian vegetation parameters from ERS scatterometer data with an evolution strategies algorithm

It is not simple to predict how environmental changes may impact tropical forest species diversity. Published hypotheses are almost invariably too incomplete, too poorly specified and too dependent upon unrealistic assumptions to be useful. Ecologist have sought theoretical simplicity, and while ...


Sheil, Douglas[Tropical forest diversity, environmental change and species augmentation: after the intermediate disturbance hypothesis]Tropical forest diversity, environmental change and species augmentation: after the intermediate disturbance hypothesis

This bibliography for the Republic of Congo is a sequel to the one on Gabon. It comprises 312 annotated references on thematic areas: fauna, flora, vegetation, ecology, conservation, silviculture, forest inventory, forest management, forest policy and economy, non-timber forest products, etc.; an...


Dupuy, B.Loumeto, J.Amsallem, I.Gerard, C.Nasi, Robert[Gestion des ecosystemes forestiers denses d'Afrique tropicale humide: 2. Congo]Gestion des ecosystemes forestiers denses d'Afrique tropicale humide: 2. Congo

The purpose of the manual is to introduce vegetation classification and survey to those with limited botanical or ecological experience. The kinds of people for whom the engaged in policy development to research workers, teachers and students. Apart from providing some background on classificatio...


Gillison, A.N.[A field manual for rapid vegetation survey and classification for general purpose]A field manual for rapid vegetation survey and classification for general purpose

Results of a 2-year study on post-fire vegetation dynamics in the unlogged dipterocarp rainforest of Sungai Wain near Balikpapan East Kalimantan, Indonesia are discussed. Results showed that the maintenance of a productive permanent forest estate is likely to be served best by avoiding logging ac...


Nieuwstadt, M.G.L. vanSheil, DouglasKartawinata, K.[The ecological consequences of logging in the burned forests of East Kalimantan, Indonesia]The ecological consequences of logging in the burned forests of East Kalimantan, Indonesia

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