The massive loss of quantity and quality of natural forest cover in Indonesia threatens an important source of foreign exchange and employment. Several studies and government policies indicate that population growth, particularly among small landholders, is the principal cause of deforestation. A...
Sunderlin, William D.
,
Resosudarmo, I.A.P.
,
[The Effect of population and migration on forest cover in Indonesia]
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The Effect of population and migration on forest cover in Indonesia
Cette etude a ete realisee en 1997-98 par le CIFOR en collaboration avec les institutions et les chercheurs camerounais, grace a l'appui financier du DFID du Royaume-Uni. Son objectif general est de compendre les causes qui expliqueraient le taux de deforestation beaucoup plus elevependantla cris...
Kemajou J.P.W.
,
Sunderlin, William D.
,
[L'Impact de la crise economique sur les populations, les migrations et le couvert forestier du Sud-Cameroun]
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L'Impact de la crise economique sur les populations, les migrations et le couvert forestier du Sud-Cameroun
Dung counts have been widely used to estimate duiker abundance and densities in tropical African forests. However, one of the major limitations of this method is that species’ identification of dung based on morphological characteristics is extremely difficult in most cases. Some authors made the...
Vliet, N. van
,
Zundel, S
,
Miguel, C.
,
Taberlet, P
,
Nasi, Robert
,
[Distinguishing dung from blue, red and yellow-backed duikers through noninvasive genetic techniques]
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Distinguishing dung from blue, red and yellow-backed duikers through noninvasive genetic techniques
General measures summarizing the shapes of mortality and fecundity schedules are proposed. These measures are derived from moments of probability distribution related to mortality and fecundity schedules. Like moments, these measures form infinite sequences, but the first terms of these sequences...
Dewi, S.
,
Chesson, P.
,
[Age-structured population growth rates in constant and variable environments: a near equilibrium approach]
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Age-structured population growth rates in constant and variable environments: a near equilibrium approach
Swidden cultivators are often found as a distinct category of farmers in the literature, but rarely appear in population censuses or other national and regional classifications. This has led to a worldwide confusion on how many people are dependent on this form of agriculture. The most often cit...
Mertz, O.
,
Leisz, S. J.
,
Heinimann, A.
,
Rerkasem, K.
,
Thiha
,
Dressler, W.
,
Pham, V.C.
,
Vu, K.C.
,
Schmidt-Vogt, D.
,
Colfer, C.J.P.
,
Epprecht, M.
,
Padoch, C.
,
Potter, L.
,
[Who counts? demography of Swidden cultivators in Southeast Asia]
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Who counts? demography of Swidden cultivators in Southeast Asia
World per capita food production is today estimated to be about 18% above what it was 30 years ago, but much of Africa is nutritionally worse off today than it was then. Since the vast majority of the poor in Africa depend on agriculture, increasing food production is among the principal means of...
International Institute of Tropical Agriculture
,
Food and Agriculture Organization of the United Nations
,
[Agricultural policies for sustainable management and use of natural resources in Africa]
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Agricultural policies for sustainable management and use of natural resources in Africa
Meeting the dual objectives of food security and ecosystem protection is a major challenge in sub-Saharan Africa (SSA). To this end agricultural intensification is considered desirable, yet, there remain uncertainties regarding the impact of climate change on opportunities for agricultural intens...
Dukua, C.
,
Zwart, Sander J.
,
Bussel, L.G.J. van
,
Heina, L.
,
[Quantifying trade-offs between future yield levels, food availability and forest and woodland conservation in Benin]
,
Quantifying trade-offs between future yield levels, food availability and forest and woodland conservation in Benin
Ebanyat, Peter
,
Ridder, N.A. de
,
Jager, A. de
,
Delve, Robert J.
,
Bekunda, Mateete A.
,
Giller, Ken E.
,
[Drivers of land use change and household determinants of sustainability in smallholder farming systems of Eastern Uganda]
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Drivers of land use change and household determinants of sustainability in smallholder farming systems of Eastern Uganda
The paper analyses how macro-economic and agricultural policies, market fluctuations and demographic changes affected forests in the Humid Forest Zone of Cameroon in four periods between 1967 and 1997. For each period it examines how these variables influenced cocoa, coffee, food, and agro-indust...
Ndoye, O.
,
Kaimowitz, D.
,
[Macro-economics, markets and the humid forests of Cameroon, 1967-1997]
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Macro-economics, markets and the humid forests of Cameroon, 1967-1997
Periodic matrix population models are a useful approach to modelling cyclic variations in demographic rates. Caswell and Trevisan [1] introduced the perturbation analysis (sensitivities and elasticities) of the per-cycle population growth rate for such models. Although powerful, their method can...
Lesnoff, Matthieu
,
Ezanno, P.
,
Caswell, H.
,
[Sensitivity analysis in periodic matrix models: A postscript to Caswell and Trevisan]
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Sensitivity analysis in periodic matrix models: A postscript to Caswell and Trevisan