Ifo Averti Suspense

Marien Ngouabi University · Forest Ecology

The world’s second-largest rainforest is key to limiting climate change — it needs urgent study and protection. The world’s second-largest rainforest is key to limiting climate change — it needs urgent study and protection.

Des rapports précis et cohérents sur l'évolution de la superficie forestière et des changements d’occupation du sol sont importants dans le contexte de l’accord de Paris où les pays ont l’obligation de soumettre régulièrement leurs rapports sur le bilan émission absorption des gaz à effet de serre. Cette notification des changements peut avoir un i...

The responses of tropical forests to environmental change are critical uncertainties in predicting the future impacts of climate change. The positive phase of the 2015–2016 El Niño Southern Oscillation resulted in unprecedented heat and low precipitation in the tropics with substantial impacts on the global carbon cycle. The role of African tropica...

Tropical forests are the most diverse and productive ecosystems on Earth. While better understanding of these forests is critical for our collective future, until quite recently efforts to measure and monitor them have been largely disconnected. Networking is essential to discover the answers to questions that transcend borders and the horizons of...

The COVID-19 pandemic has caused global disruption, with the emergence of this and other pandemics having been linked to habitat encroachment and/or wildlife exploitation. High impacts of COVID-19 are apparent in some countries with large tropical peatland areas, some of which are relatively poorly resourced to tackle disease pandemics. Despite thi...

The world's most extensive tropical peatlands occur in the Cuvette Centrale depression in the Congo Basin, which stores 30.6 petagrams of carbon (95% CI, 6.3-46.8). Improving our understanding of the genesis, development and functioning of these under-studied peatlands requires knowledge of their topography and, in particular, whether the peat surf...

Structurally intact tropical forests sequestered about half of the global terrestrial carbon uptake over the 1990s and early 2000s, removing about 15 per cent of anthropogenic carbon dioxide emissions. Climate-driven vegetation models typically predict that this tropical forest ‘carbon sink’ will continue for decades. Here we assess trends in the c...

Background and Objective: Land use information is increasingly essential for knowledge of the environment mainly in the context of global change. The objective of this study was to investigate the benefits of using field-collected ecological data and high-resolution images to map different types of land cover and vegetation from a Landsat OLI 8 i...

Peatlands have long been unrecognized or ignored, but they will play a crucial role in climate change and water security and must be a focus of policy and research

Dans le contexte mondial de réchauffement global les forêts du bassin du Congo ont un rôle majeur à jouer dans l'atténuation des changements climatiques. Une étude sur l'impact de la croissance urbaine sur le stock de carbone aérien a été conduite dans de la république du Congo. Cette étude se repose sur l'hypothèse de base suivante, les villes se...

The recent publication of the first spatially explicit map of peatlands in the Cuvette Centrale, central Congo Basin, reveals it to be the most extensive tropical peatland complex, at ca. 145,500 km². With an estimated 30.6 Pg of carbon stored in these peatlands, there are now questions about whether these carbon stocks are under threat and, if so,...

Recent publication attested that in the urban forest of Brazzaville, litter decomposition is faster with almost 45% of initial weight loss than in the dry season, where an average loss of 26% in initial litter weight is noted (Ifo et al., 2018). This study was carried out in the urban forest of Brazzaville to follow the decomposition of some organi...

In the Congo basin, considerable uncertainty remains about the amount and spatial variation of carbon stocks. We studied two types of seasonally flooded forests (dominated by Guibourtia demeusei and Lophira alata) and nearby terra firme forests in northern Congo. We sampled 1.25 ha per forest type and a total of 1,400 trees ≥5 cm diameter. AGB rang...

Urban growth is identified as one of the main deforestation drivers and land degradation in tropical region. Very few data exist to quantify the impact of this drivers. The aims of this study were: (i) estimating the activity data of the growth of the city's Impfondo in the period between 1986 to 2016; (ii) determining the indirect drivers of that...

The Republic of Congo straddles the equator, which gives it a variability in the geological and climatic substratum, thus inducing significant biological diversity. It is made up of 69% of forests and 31% of savannas. These forests are in some places degraded by anthropogenic pressure. This forest area appears to be uniform and consists of several...

The actual climatic changes will have great consequences on the biological systems. In Republic of Congo, they appear already by coastal erosion, of the very high average temperatures, great drying in the forests, etc. The comprehension of this phenomenon constitutes one of the tracks to define the means of fight as well for the attenuation as for...

Tree allometric equations that are used to predict the biomass of a tree from its dendrometrical characteristics are key elements for the estimation of forest carbon stocks. Few equations compared to the diversity of forest ecosystems are currently available for the tropical forests of the Congo Basin. Pantropical equations are available but a pend...

Background and Objective: Urban forest can play an important role to mitigate global change and regulate local climate of cities. Litter fall and leaf decomposition represent the main pathway for nutrient cycling in forest ecosystems. The aims of this study were to: (i) Evaluate the annual production of litter fall, (ii) Quantify the standing litte...

Les forêts tropicales humides du bassin du Congo sont encore mal connues dans leur fonctionnement bien que leurs rôles dans l'atténuation du climat aient été rapportés depuis quelques décennies. Dans le but d'améliorer la connaissance du fonctionnement des forêts tropicales pluvieuses dans le bassin du Congo, une étude sur la décomposition des gros...

Understanding major drivers of tree species distribution and tropical forest composition is imperative for biodiversity conservation. This study aimed to assessing the floristic diversity and structure of Lesio-louna forest in southern Republic of Congo and its implications for sustainable development. The measurements were made in six plots: three...

Urban growth is identified as one of the main deforestation drivers and land degradation in tropical region. Very few data exist to quantify the impact of this drivers. The aims of this study were: (i) estimating the activity data of the growth of the city's Impfondo in the period between 1986 to 2016; (ii) determining the indirect drivers of that...

In an international context of fighting climate change through the sustainability of forest ecosystems for their roles as carbon sinks, archival documents reveal that the city of Brazzaville had significant areas of forest. The present study has proposed to monitor the evolution of theses forest in the period from 1946 to 2016. For this study we us...

A study on the change of forest cover was carried out in the Department of Likouala, Republic of Congo for the period from 1986 to 2015. It was intended to calculate the areas of the different land conversions in the study period, but also to identify the causes of deforestation and forest land Landsat TM (1986), Etm + (2001), and Oli (2015) images...

The amount of carbon stock under different land type's cover was studied in the north east of Republic of Congo. Samples of soil from the surface 0-15 cm horizon were collected under 12 land types classes. Results showed that the lowest soil C was noted in flooded primary forests of Lophira alata Banks ex Gaertu. With an amount of 17.21 t C ha-1 ,...

In order to improve the knowledge of the functioning of tropical rainfall forests in the Congo basin ,a study on the quantification of the stocks of carbon in coarse woody debris was done in Likouala’s area, in Republic of Congo. To achieve this goal,14 squares plots of 50mx50m had installed on the whole study area, including ten plots in primary f...

In order to improve the knowledge of the functioning of tropical rainfall forests in the Congo basin ,a study on the quantification of the stocks of carbon in coarse woody debris was done in Likouala's area, in Republic of Congo. To achieve this goal,14 squares plots of 50mx50m had installed on the whole study area, including ten plots in primary f...

A study on the urban growth during the time between 2000 to 2016 was undertaken in a forest locality of the republic of Congo, the town of Ouesso. Landsat images covering this period had been selected and treated thanks to the software ENVI 4.6.1 and ArcGis 10.2. Supervised classification was used and applied to the zone of study. The results of th...

The data of carbon stock of central African swamps forests are very few. This study carried out an assessment of the carbon stock of living biomass and coarse woody debris of three biotopes (flooded forest, seasonal flooded forest, and terra firm forest) of Likouala swamp forest (North of Congo). The average of the carbon stock are 190.72±98.7 tC/h...

Peatlands are carbon-rich ecosystems that cover just three per cent of Earth's land surface, but store one-third of soil carbon. Peat soils are formed by the build-up of partially decomposed organic matter under waterlogged anoxic conditions. Most peat is found in cool climatic regions where unimpeded decomposition is slower, but deposits are also...

In Republic of Congo, forests occupy 64.6 % of the territory. They spread from north to south over nearly 22,106 ha distributed in three major zones: the forest of the Northern Congo (68%), the forest of Chaillu (16%) and the forest of Mayombe (7%). The remaining 9% are mosaic forests and savannah, mostly gallery and forest clump (HF) forests like...

Une étude sur la variabilité spatiale du stock de carbone organique et de l'azote totale a été faite dans les savanes des plateaux Tékés précisément dans deux sites le plateau de Mbé (réserve de Lésio-Louna) et le plateau de Nsa (réserve de Faune de Léfini). L'objectif général de l'étude était de déterminer les causes de la variabilité spatiale du...

Une étude sur la variabilité spatiale du stock de carbone organique et de l'azote totale a été faite dans les savanes des plateaux Tékés précisément dans deux sites le plateau de Mbé (réserve de Lésio-Louna) et le plateau de Nsa (réserve de Faune de Léfini). L'objectif général de l'étude était de déterminer les causes de la variabilité spatiale du...

RESUME La forêt du Parc Zoologique est l'une des forêts naturelles reliques intra urbaines de la ville de Brazzaville. Cet écosystème subit une pression anthropique due aux besoins croissants en bois énergie, en bois d'artisanat et en plantes utilisées en phytothérapie. Les zones les plus dégradées ont été reboisées en eucalyptus. Il a été constaté...

The paper contributes new data on fine root production in tropical forests from the Teke Plateau, an underexplored area of Africa that is dominated by grove forests.

A Landsat-based humid tropical forest disturbance alert was implemented for Peru, the Republic of Congo and Kalimantan, Indonesia. Alerts were mapped on a weekly basis as new terrain-corrected Landsat 7 and 8 images were made available; results are presented for all of 2014 and through September 2015. The three study areas represent different stage...

Trees species diversity, richness, and similarity were studied in fifteen plots of the tropical rainforests in the northeast of the Republic of Congo, based on trees inventories conducted on fifteen 0.25 ha plots installed along different types of forests developed on terra firma, seasonally flooded, and on flooded terra. In all of the plots instal...

The study of structural and tree flora biodiversity of the forest of the Mbomo-Kelle UFA was done on an area of 88.5 ha (0.014% of the total UFA area). The inventory was carried out in plots of 200 m × 25 m (0.5 ha), arranged in a contiguous way along the opened trails in the forest with an equidistance interval of 2 km. 11,012 trees of DBH ≥20 cm...

Au moment où la gestion durable des écosystèmes forestiers requiert une parfaite connaissance de la flore, celle du Congo en général et particulièrement celle des forêts marécageuses du nord-Congo, demeure encore peu connue. La présente étude vise à contribuer à une meilleure caractérisation de la diversité floristique des forêts marécageuses de la...

The study aimed to estimate the carbon stocks of above-and below-ground biomass in Lesio-louna forest (Republic of Congo). The methodology of allometric equations was used to measure the carbon stocks of Lesio-louna moist forest. The research was done with 22 circular plots, each 1,256 m 2. In the 22 plots, we made measurements on a total of 347 tr...

In order to know the role of plant woody debris in the carbon cycle, a study of carbon stocks and carbon flow of plant woody debris was conducted in the natural forests of the centre of the republic of Congo in the Bateke Plateau. Allometric equations were used to measure the carbon stock of in dead wood debris of Lesio-louna tropical rainforest. T...

Le Bassin du Congo couvre le Cameroun, la République centrafricaine, la République démocratique du Congo, la République du Congo, la Guinée équatoriale et le Gabon. Il comprend environ 70 % de la couverture forestière de l’Afrique. Sur les 530 millions d’hectares du Bassin du Congo, 300 millions sont couverts par la forêt constituée à plus de 99 %...

The paper contributes new data on fine root production in tropical forests from the Teke Plateau, an underexplored area of Africa that is dominated by grove forests. Importantly, this study contributes to our understanding of the role of the successional age of vegetation and the impacts of water availability on ecosystem functions, which may assis...

The Boubissi forest exploitation unit is one of the forest management units assigned to logging. Knowledge of the existing floristic resource through a management inventory is a preliminary operation allowing the planning of the logging activity. In the Boubissi forest exploitation unit, floristic diversity was studied from the floristic surveys ma...

s Tree aboveground biomass (AGB) distribution and carbon storage in different DBH (diameter at breast height) classes were calculated and compared between three different humid forest of the north of Congo (peat land's forest, seasonally flooded forest, and terra ferma forest) mainly in the forest of Likouala. AGB carbon stock varies in this study...

The research was aimed to estimate the carbon stocks of above-ground biomass (AGB) in Lesio-louna forest in Republic of Congo. The methodology of Allometric equations was used to measure the carbon stock of Lesio-louna tropical rainforest. The research was done with six circular plots each 40 m of diameter, with a distance of 100 m between each plo...

The study was aimed to estimate the carbon stocks of above- and below-ground biomass in Lesio-louna forest of Congo. The methodology of allometric equations was used to measure the carbon stocks of Lesio-louna natural forest. We are based pre- cisely on the model II which is also called non-destructive method or indirect method of measuring carbon...

In this study, we analyzed the above-ground biomass data for 44 trees with diameter ≥10 cm from Inkou Forest Island in Congo. The aim of this research was to estimate the carbon stocks of above-and below-ground biomass in the secondary forest of Lesio-louna (Teke trays in Republic of Congo). The methodology of Allometric equations was used to measu...

The research was aimed to estimate the carbon stocks of above-and below-ground biomass in the secondary and gallery forest of Lesio-louna (Republic of Congo). The methodology of Allometric equations was used to measure the carbon stock of Lesio-louna natural forest. We were based precisely on the model II which is also called non-destructive method...

Readiness for the climate change mitigation scheme; Reducing Emissions from Deforestation and forest Degradation is a multi-disciplinary process. Linking the science, technical training, institutional support and wellbeing of populations, under conditions of information uncertainty can be challenging. Since 2010, the World Resources Institute and p...

Abstract In Congo Brazzaville, forests occupy 64.6 % of the territory. They spread from north to south over nearly 22,106 ha distributed in three major zones: the forest of the Northern Congo (68%), the forest of Chaillu (16%) and the forest of Mayombe (7%). The remaining 9% are mosaic forests and savannah, mostly gallery and forest clump (HF) fore...

The carbon budget of marginal forests that developed on the savannah in the Plateau Teke has not yet been studied despite increasing evidences of their spatial expansion. Measurements of litter fall, litter amount on forest floor and leaf litter decomposition was undertaken, on three plots in a Gallery Forest (GF) and three plots in a hill-slope fo...

Des études sur les apports et les stocks de carbone au sol dans deux types de forêts (forêt galerie(FG) et forêt secondaire (FS)) des plateaux teke ont été conduits dans les plateaux teke en vue des travaux de thèse. Ces travaux ont été menés dans un contexte international d’augmentation du CO2 dans l’atmosphère, et pour laquelle les forêts pou...

RESUME Des mesures de flux de CO2 émis par le sol ont été réalisées dans de jeunes plantations d'Eucalyptus du littoral congolais sur quatre parcelles âgées de 2, 5, 8 et 11 ans afin étudier leurs variations spatiales. Ces mesures de respiration du sol montrent l'existence d'une très grande variation à différentes échelles. Les flux moyens annuels...

Soil CO2 efflux was measured in clear-cut and intact plots in order to quantify the impact of harvest on soil respiration in an intensively managed Eucalyptus plantation, and to evaluate the increase in heterotrophic component of soil respiration because of the decomposition of harvest residues. Soil CO2 effluxes showed a pronounced seasonal trend,...