Simuler la ressource forestière à l'échelle d'un massif : application de SIMMEM et GYMNOS

Conference (2012, April 02)

Estimation de l’impact de différents modes d’exploitation forestière sur les stocks de carbone en Afrique centrale

in Bois et Forêts des Tropiques (2011), 308(2), 75-86

There has been little in-depth research to date on logging impacts in Central Africa in terms of carbon emissions. The REDD mechanism (Reducing Emissions from Deforestation and forest Degradation), has ... [more ▼]

There has been little in-depth research to date on logging impacts in Central Africa in terms of carbon emissions. The REDD mechanism (Reducing Emissions from Deforestation and forest Degradation), has brought this topic to the forefront, with the increase in managed logging concessions and the spread of low-impact logging methods. The aim of this study was to make a meta-analysis covering different experiences reported in the literature. The data collected were applied to a hypothetical logging operation in order to produce a theoretical assessment of its impact on carbon stocks. Our results show that, based on the assumptions used, managed forestry in a conventional logging concession with no forward planning would reduce carbon losses by one tenth, with 10 to 20 m3 of timber extracted per hectare. Most of the carbon savings would result from an increase in the minimum logging diameter. The other gains from low-impact logging would result from improving the design of logging roads, i.e., 5 to 8% of carbon losses due to conventional logging practice. These gains are higher than the error found for the nearest reality measurements made for clear-felled biomass in French Guiana. However, they are much lower than the errors calculated for biomass estimations in several studies available in the literature. In any case, introducing development planning and low-impact logging techniques in timber concessions are able to induce a favourable difference to carbon stocks in Africa’s dense forests. [less ▲]

Inventaire sur l’affectation des terres de la Belgique dans le cadre du Protocole de Kyoto et de la CCNUCC

Poster (2010, May)

La Belgique réalise annuellement un inventaire de ses émissions de gaz à effet de serre (GES) dans le cadre du Protocole de Kyoto et de la Convention Cadre des Nations Unies sur les Changements ... [more ▼]

La Belgique réalise annuellement un inventaire de ses émissions de gaz à effet de serre (GES) dans le cadre du Protocole de Kyoto et de la Convention Cadre des Nations Unies sur les Changements Climatiques (CCNUCC/UNFCCC). L’affectation des terres et le changement d’affectation des terres (LULUCF) forment l’un des cinq principaux secteurs qui doivent être rapportés dans cet inventaire national. Ce poster présente la méthode mise en œuvre au niveau de la Belgique pour réaliser le rapportage de ce secteur, ainsi que les résultats pour 1990 et 2008. [less ▲]

Caractérisation de l’agroforêt LIMBA-bananier de la Réserve de Biosphère de Luki (Mayumbe, Bas-Congo)

Master's dissertation (2008)

Few studies have been realised about agroforestry systems including banana plants. The aim of this study is to carry out a better knowledge of the original agroforestry system: the limba – banana ... [more ▼]

Few studies have been realised about agroforestry systems including banana plants. The aim of this study is to carry out a better knowledge of the original agroforestry system: the limba – banana (Terminalia superba- Musa acuminate cult. ‘Gros Michel’). To achieve this aim, the attention has been put on three points: characterizing the woody component, estimating the yield of the banana understorey crop and evaluating the vegetal diversity of this system. The limbas’ plantation doesn’t show anymore its expected silvicultural potential. Its density is in average 26 limbas per hectare, which represents a volume of 136.71 m³/ha, that is to say the third of a limba’s plantation volume with the same age and with 86 limbas/ha. The botanical composition of this system does not fundamentally differ from a pure limba’s plantation. However, the woody vegetal diversity is reduced by a half. With a canopy closure at 60 %, the yield of 20-year old banana plantation is 25 % lower than a classic banana plantation yield of the province (Bas-Congo). This yield is suitable for a banana plantation of this age with no external input. Banana plantations in open field are usually abandoned after 10 years because of an unsufficient yield, and they are then lied fallow for 10 to 15 years. This agroforestry system appears to be sustainable and it suits perfectly the transition areas of the Biosphere Reserve of Luki. [less ▲]