Jan Bogaert

Jan Bogaert
University of Liège | ulg · Gembloux Agro-Bio Tech

Professor
Landscape ecologist

About

296
Publications
123,902
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Introduction
Skills and Expertise

Publications

Publications (296)
Article
Full-text available
Street trees are always considered a vital part of urban green infrastructure in urbanized areas through mitigating the negative effects caused by urbanization taking part in human well-being. However, little is still known about their diversity, structure and protection, mostly in Lubumbashi city in the Democratic Republic of the Congo (DR Congo),...
Article
Full-text available
The landscape of the Port-au-Prince agglomeration in the Republic of Haiti has undergone profound changes linked to (peri-)urban expansion supported by rapid demographic growth. We quantify the land cover dynamics along the urban-rural gradient of the Port-au-Prince agglomeration using Landsat images from 1986, 1998-1999, 2010, and 2021 coupled wit...
Article
Full-text available
One of the most fundamental questions in ecology is how many species inhabit the Earth. However, due to massive logistical and financial challenges and taxonomic difficulties connected to the species concept definition, the global numbers of species, including those of important and well-studied life forms such as trees, still remain largely unknow...
Conference Paper
Full-text available
In Southern Katanga (DR Congo), mining activities lead to various anthropogenic effects such as deforestation and unplanned (peri-) urbanization. This study aims to quantify the anthropization of landscapes around the agglomerations of Southern Katanga (Lubumbashi, Likasi, Fungurume and Kolwezi) through the analysis of area evolution, with a view t...
Conference Paper
Full-text available
La non appropriation par les communautés locales des programmes visant la gestion durable des forêts et la sous-utilisation de leur capacité à contribuer à cette gestion, limitent l’atténuation du processus de déforestation. Cette étude a examiné la gouvernance des ressources forestières par les services publics et les organisations non gouvernemen...
Conference Paper
Lufira Biosphere Reserve (LBR) is a protected area located in Southeastern DR Congo, created for the conservation of Miombo woodland, an ecosystem threatened by anthropogenic activities developed in the region. However, scientific studies regarding land cover dynamics within the LBR are non-existent to date. This study maps and quantifies the land...
Conference Paper
Avec un indice de développement humain qui le place en 186ème position sur 187 et plus de 85% de la population qui vit avec moins de 1,25 USD par jour, la République Démocratique du Congo (RDC) fait simultanément face à des défis écologiques, démographiques et économiques majeurs : seulement 2,5% du potentiel du réseau hydroélectrique sont exploité...
Article
Full-text available
Tropical forests store 40-50% of terrestrial vegetation carbon. Spatial variations in aboveground live tree biomass carbon (AGC) stocks remain poorly understood, in particular in tropical montane forests. Because of climatic and soil changes with increasing elevation, AGC stocks are lower in tropical montane compared to lowland forests. Here we ass...
Article
Full-text available
Tropical forests store 40–50 per cent of terrestrial vegetation carbon1. However, spatial variations in aboveground live tree biomass carbon (AGC) stocks remain poorly understood, in particular in tropical montane forests2. Owing to climatic and soil changes with increasing elevation3, AGC stocks are lower in tropical montane forests compared with...
Article
Full-text available
The forest resources within the municipality of Vallières in the Republic of Haiti are subject to ever-increasing anthropogenic pressures, leading to a reduction in their area and the degradation of their ecosystem services. This study quantified the spatial pattern changes of forest ecosystems within the municipality of Vallières from 1984 to 2019...
Article
Full-text available
The present research developed a novel methodological framework to differentiate natural mangrove stands (i.e., original), from stands which were planted and stands naturally established after interaction between planted and non-planted stands (e.g., through pollination, i.e., non-original). Ground-truth and remote sensing data were collected for Z...
Article
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...
Article
Full-text available
West African Sahelian and Sudanian ecosystems provide essential services to people and also play a significant role within the global carbon cycle. However, climate and land use are dynamically changing, and uncertainty remains with respect to how these changes will affect the potential of these regions to provide food and fodder resources or how t...
Article
Full-text available
En Haïti, les parcs nationaux ont été créés pour préserver les rares massifs forestiers qui sont constamment menacés par l'agriculture et l'élevage. Toutefois, des études scientifiques sur la dynamique paysagère des écosystèmes forestiers des parcs d’Haïti ont reçu peu d’attention. Cette étude a pour objectif de cartographier et quantifier la perte...
Article
Full-text available
En Haïti, la couverture forestière est en constante régression et n'excède pas 3,5% du territoire national. Des aires protégées ont été créés pour préserver les rares massifs forestiers, dont l'Unité 2 du Parc National Naturel de la Forêt des Pins (PNN-FP2). Toutefois, les maigres ressources forestières de ce parc sont sujettes aux diverses pressio...
Article
Full-text available
O objetivo foi abordar um mosaico de vegetação de savana (áreas marginais-MS e disjuntas-DS) no Cerrado Setentrional Brasileiro para investigar o papel desempenhado por fatores ambientais como determinantes da organização comunitária em escala espacial, a fim de compreender os padrões divergentes ao longo de uma gradiente ambiental. Analisamos pred...
Article
Recently, the growing need to complement rural and foreign sources of food and woodfuel is driving interest in urban forestry management in medium cities. The present study was designed to characterize the diversity of fruit trees in households of two rapidly developing cities in southeastern DR Congo (Lubumbashi and Kolwezi), and shed light on the...
Conference Paper
Full-text available
Le développement socioéconomique issu de l’émergence du secteur minier en RDC engendre des modifications profondes des écosystèmes naturels. L’objectif de cette étude est d’analyser la déforestation au sein de l’Arc Cuprifère Katangais (ACK) et dans des mailles de 10 km x 10 km, sur la base des images Landsat de 2002 et 2015. Résultats. Les résulta...
Article
Full-text available
Significance The responses of tropical forests to heat and drought are critical uncertainties in predicting the future impacts of climate change. The 2015–2016 El Niño Southern Oscillation (ENSO) resulted in unprecedented heat and low precipitation across the tropics, including in the very poorly studied African tropical forest region. We assess Af...
Article
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...
Article
En Haïti, les parcs nationaux ont été créés pour préserver les rares massifs forestiers du pays qui sont constamment menacés par l'agriculture et l'élevage. Toutefois, des études scientifiques sur la dynamique paysagère des écosystèmes forestiers des parcs d’Haïti ont reçu très peu d’attentions. Cette étude a pour objectif de cartographier et quant...
Article
Full-text available
In Haiti, national parks were created to preserve the rare forests that are constantly threatened by agriculture and livestock. However, scientific studies on the landscape dynamics of forest ecosystems in Haiti’s parks have received little attention. The objective of this study is to map and quantify the loss of forest cover in the natural nationa...
Article
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...
Article
Full-text available
This paper analyzes active fires from 2001 to 2019 in and around the Luki Biosphere Reserve, western DR Congo to assess fire risks. In this study, we used descriptive statistics to assess fire events, Getis-Ord G hotspot analysis to define the spatial patterns presented by the fire events. Diagnostics for spatiotemporal clustering of fires location...
Article
Full-text available
Due to new urbanization patterns, where cities' edges are becoming increasingly difficult to delimit, a better understanding of urban-rural gradients has become a key issue for urban planning. These interstitial territories are characterized for being highly heterogeneous, with hybrid and complex dynamics and-due to their landscape ambiguity and ra...
Preprint
Full-text available
West African Sahelian and Sudanian ecosystems are providing essential services to people and also play a significant role within the global carbon cycle. However, climate and land use are dynamically changing and it remains uncertain how these changes will affect the potential of these regions for providing food and fodder resources or the biospher...
Article
Full-text available
Cette étude a pour objectif d'analyser la dynamique spatio-temporelle du phénomène d'urbanisation de la ville de Bujumbura. Nous avons effectué cette analyse, à partir de six images Landsat acquises entre 1986 et 2019, par l'approche cartographique couplée aux outils de l'écologie du paysage. Les résultats révèlent qu'au cours des trois dernières d...
Article
After having introduce the pertinence of the information shortage available regarding the time of the creation of the town of Elisabethville, a first theme is reviewed. It consists to define some terms, as well in French than in English, They concern the vegetation units of the region and diverse sub-types. Quoting the word « miombo » induces to ta...
Article
Ce travail présente les résultats d’une méta-analyse de quatre études menées sur les Amphibiens à Kasugho, Butembo, Mambasa et Kisangani en République Démocratique du Congo. L’objectif principal était de vérifier le lien entre le taux d’anthropisation des habitats et la fréquence des espèces observées afin d’identifier d’éventuelles espèces indicat...
Article
Full-text available
Lufira Biosphere Reserve (LBR) is a protected area located in Southeastern DR Congo, created for the conservation of Miombo woodland, an ecosystem threatened by anthro-pogenic activities developed in the region. However, scientific studies regarding land cover dynamics within the LBR are non-existent to date. This study maps and quantifies the land...
Poster
DYNAMIQUE SPATIO-TEMPORELLE D’OCCUPATION DU SOL DANS LA RESERVE DE FAUNE À OKAPIS EN République Démocratique du Congo
Article
La prise de conscience de l’importance des espaces verts et des services écosystémiques qu’ils rendent est primordiale pour tout programme de leur protection en milieu urbain. Pour cette raison, la perception des espaces verts des communes de la ville de Bujumbura (Muha, Mukaza et Ntahangwa) au Burundi et de leurs services écosystémiques par les ac...
Article
Full-text available
Ethiopia has been experiencing rapid urbanization, resulting in a considerable transformation of its urban landscape. This rapid urbanization creates both opportunities and challenges for society and many investment possibilities in the process. A more in-depth understanding is needed of what determines these urbanization trends. Thus, the purpose...
Article
Aim Mapping tree species richness across the tropics is of great interest for effective conservation and biodiversity management. In this study, we evaluated the potential of full‐waveform lidar data for mapping tree species richness across the tropics by relating measurements of vertical canopy structure, as a proxy for the occupation of vertical...
Article
Full-text available
La ville du Cap-Haïtien au Nord d'Haïti, avec une population qui double tous les 20 ans, enregistre une expansion rapide du bâti associée à la régression du couvert végétal. A partir d'une interprétation des images Landsat de 1986, 2003 et 2017, la dynamique de l'occupation du sol a été mise en évidence à travers l'approche cartographique couplée a...
Article
Full-text available
•An easy-to-apply index that can support decision-makers to identify the most vulnerable regions to COVID-19.•The impact of the lack of resources in the country-side to fight SARS-CoV-2 can be assuaged by shielding selected regions.•IndCo can support countries to prepare the reopening process while controlling COVID-19 in their regions.
Article
Full-text available
The sensitivity of tropical forest carbon to climate is a key uncertainty in predicting global climate change. Although short-term drying and warming are known to affect forests, it is unknown if such effects translate into long-term responses. Here, we analyze 590 permanent plots measured across the tropics to derive the equilibrium climate contro...
Article
The sensitivity of tropical forest carbon to climate is a key uncertainty in predicting global climate change. Although short-term drying and warming are known to affect forests, it is unknown if such effects translate into long-term responses. Here, we analyze 590 permanent plots measured across the tropics to derive the equilibrium climate contro...
Article
Full-text available
Facing the new territorial configurations where the traditional binary conception of rural area versus urban area has become obsolete, this contribution aims at establishing new precisions about the most recurrent terms used in the scientific literature to describe the urban-rural gradient in a Latin-American context. As methodology, in order to id...
Presentation
Full-text available
La récente et future urbanisation accrue de la ville de Kinshasa pose de nombreux enjeux dont celui de la sécurité alimentaire urbaine. L’étalement urbain favorisé par la poussée démographique, entretient la raréfaction des espaces agricoles intra-urbains et périurbains avec une profonde modification du paysage posant le problème de production agri...
Article
Full-text available
Description du sujet. À Lubumbashi, la croissance spatiale urbaine rapide (plus de 5 % par an) et non planifiée concourt à des changements importants de l’occupation du sol, en particulier autour des sites miniers où de fortes concentrations de métaux lourds dans les sols présentent d’énormes conséquences environnementales et sanitaires. Objectifs....
Poster
Full-text available
Lubumbashi, la croissance spatiale urbaine rapide et non planifiée concourt à des changements importants de l'occupation du sol, en particulier autour des sites miniers (Fig 1.). Autour de ces sites, des études ont mis en évidence (i) la présence des surfaces dénudées qui présentent des concentrations anormalement élevées en métaux lourds (Fig 2.),...
Conference Paper
Full-text available
À Lubumbashi, la croissance spatiale urbaine rapide (880ha/an par an ; Useni et al., 2018) et non planifiée concourt à des changements importants de l’occupation du sol, en particulier autour des sites miniers où de fortes concentrations de métaux lourds dans les sols présentent des risques environnementaux et sanitaires (Banza et al., 2009). La pr...
Preprint
Full-text available
RESUME Mots-clés: Anthropisation, effort de l'échantillonnage, diversité spécifique L'étude, réalisée dans le Parc National de la Kibira consistait à mettre en évidence l'effet de lisière dans quelques sites du secteur Rwegura et à analyser l'exhaustivité de l'échantillonnage et la diversité spécifique de ces sites. Les courbes d'accumulation de la...
Article
Full-text available
Cette étude porte sur la perception locale de la dynamique du paysage de la réserve partielle de faune de Dosso, son impact sur la composition de la faune ainsi que les causes à l'origine de cette dynamique il y a exactement 40 ans, 20 ans et actuellement. Pour se faire, des enquêtes ont été conduites dans 46 villages de la réserve. Le logiciel SPS...
Article
Full-text available
RESUME Les impacts du changement climatique et des activités humaines constituent les principaux facteurs de modélisation de la structure et composition des paysages au Niger. Cette étude, réalisée dans les paysages anthropisés semi-arides des communes contigües d'Aguié, Tchadoua et Gangara dans la région de Maradi, a pour objectif d'analyser la dy...
Article
Full-text available
Urbanisation in Ethiopia is increasing rapidly. This paper uses city-level data to investigate the evolution of Ethiopia’s city size distribution from 1984 to 2012, using descriptive statistics and time-series Gini coefficient calculations. Over that period, the study found that overall city size distribution followed an apparent parallel growth pa...
Conference Paper
Full-text available
Le présent travail a été effectué dans la ville de Lubumbashi, une zone à forte croissance démographique et où la gouvernance urbaine se heurte au besoin croissant de gestion foncière et de fourniture d'infrastructures résultant de la baisse de la performance économique, de l'instabilité politique et institutionnelle. Cette zone, située au sein de...
Article
Full-text available
Une meilleure compréhension du capital naturel constitue un atout important aux efforts d’élaboration des stratégies de développement. Ce chapitre situe la mosaïque des sols dominants au Katanga tant dans le contexte de leurs facteurs génétiques que dans celui de leur potentiel pour une valorisation agricole rationnelle. La diversité de la couvertu...
Article
Full-text available
RESUME La Réserve Partielle de Faune de Dosso est une aire protégée à statut de zone tampon du parc national du W du Niger. De sa création (1962) à aujourd'hui, la réserve est devenue l'espace d'accueil des réfugiés écologiques (migrants agricoles et éleveurs peulhs) du Niger et des pays limitrophes. Une destruction massive de son potentiel ligneu...
Article
Urbanisation generally causes a number of ecological problems, mostly associated with loss or degradation of green spaces. In the city of Lubumbashi (Democratic Republic of Congo), not only the health of the local vegetation has been profoundly affected due to an accelerated and uncontrolled spatial dynamics, but decision-makers and planners are al...
Article
Full-text available
Located in the south-east of the Democratic Republic of Congo (DR Congo), Lubumbashi city is surrounded by a belt of savanna, referred to as “savanization halo”, where rare miombo woodland patches could be spotted. This study evaluated the impact of anthropogenic activities on changes in the spatio-temporal pattern within that savanization halo bet...
Article
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Dans le but d forestier , trois images satellitaires Landsat TM 1986, Landsat ETM+ 2005, et Landsat OLI TIRS 2016 ont été analysées. Le traitement de ces images a été amélioré suite à des missions de vérification sur le terrain de 2005 et de 2016. La dynamique paysagère a été déterminée essentiellement grâce à processus de transformation spatiale e...
Article
Full-text available
La recherche du bien-être social a suscité l’émergence de diverses activités anthropiques dans l’Arc Cuprifère Katangais (A.C.K.), notamment l’exploitation minière qui a entrainé une régression importante de sa couverture forestière. Pour cette raison, cette étude a analysé la fragmentation forestière dans l’A.C.K. de 2002 à 2015, à partir des mail...
Poster
Full-text available
La forêt claire de type miombo, le "miombo woodland" des auteurs anglo-saxons, est un type de végétation largement distribué en Afrique zambézienne où il fournit des produits forestiers (non) ligneux à des millions d'habitants. En RD Congo, il couvre près de 23 % de la surface forestière totale et reste le type de forêt le plus dominant (>50 %) dan...
Conference Paper
Full-text available
La forêt claire de type miombo, le « miombo woodland » des auteurs anglo-saxons, est un type de végétation largement distribué en Afrique zambézienne où il fournit des produits forestiers, ligneux ou non, à des millions d'habitants. En RD Congo, il couvre près de 23 % de la surface forestière totale et reste le type de forêt le plus dominant (>50 %...
Article
Full-text available
Aim Large tropical trees form the interface between ground and airborne observations, offering a unique opportunity to capture forest properties remotely and to investigate their variations on broad scales. However, despite rapid development of metrics to characterize the forest canopy from remotely sensed data, a gap remains between aerial and fie...
Article
Full-text available
Aim: Large tropical trees form the interface between ground and airborne observations, offering a unique opportunity to capture forest properties remotely and to investigate their variations on broad scales. However, despite rapid development of metrics to characterize the forest canopy from remotely sensed data, a gap remains between aerial and fi...
Article
Full-text available
This study evaluates the characteristics of green spaces subject to peri-urbanization in Kinshasa. It analyzes their typology, spatial pattern, vegetation, management, state of maintenance and potential ecosystem services. The analysis is based on a random sample of 87 green spaces situated in urban and peri-urban areas of the city and is mainly ba...
Article
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This article highlights the strong presence of the peri-urbanization phenomenon in Kinshasa by characterizing its urban-rural gradient. From the observation of the urbanization morphology on Google Earth of 34,035 square areas of 25 ha each, covering the entire extent of the city, we carried out a typology of its municipalities according to the urb...