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Theses --- duplicates available --- East Africa --- Rwanda --- Tanzania = Tanzanie ( = Tanganyika = German East Africa = British East Africa (after 1918) ) --- savanna woodland --- thesis --- vegetation dynamics

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Estimating biomass and monitoring its evolution in the world’s different ecosystems is
an important challenge at the global level, particularly to guide political decisions in the
management of these environments accumulating carbon in their biomass. However, biomass
stocks in "miombo" woodlands and factors that influence them are still poorly quantified
despite the large size of this ecoregion in Africa. This master thesis focuses on the analysis of
the structure of a 10-ha permanent inventory system in a "miombo" woodland and attempts to
identify the structural, architectural, compositional and diversity factors influencing biomass.
The classification of miombo as a "savanna" or as a "forest" is also discussed throughout this
study.
Dendrometric measurements were carried out in the Mikembo sanctuary, 30 km northeast
of Lubumbashi, Democratic Republic of Congo (11°28’57" - 11°29’5" S, 27°40’12" - 27°40’28"
E; 1200 m altitude).
Comparisons with other study sites, comparisons between different site plots and
comparisons between the different dominant species into the site are made by combining
inventory data, species-specific and site-specific allometries and bibliographic data.
The 10-ha inventory system has a high biomass density (154,2 tons per hectare) compared
to other estimates in "miombo" woodlands. The presence of Marquesia macroura, typical of
wet miombo and capable of reaching a large trunk diameter, is largely responsible for the
high biomass value at this site, despite the abundance of Julbernardia paniculata. The heights
and crown diameters of Mikembo trees are higher than the average for African savannas. The
hypothesis is that the site was once a "muhulu" dry forest that was degraded by fires and
charcoal harvesting and has been regenerating since its protection was enforced. Comparison
between the site plots shows excellent potential for estimating above-ground biomass by basal
area and basal area weighted architectural attributes, which are measurable by remote sensing
methods. Comparison between dominant species of the site shows a particular architecture
compared to other studies that have used a similar method in rainforest ; the crown size in
juvenile age does not seem to show any difference between canopy dominant species and
undergrowth species.
The master thesis provides a direction towards which future work could be carried out
to estimate biomass in miombo. The studied site is rather particular compared to other sites
studied in miombo, with a higher value of above-ground biomass and taller trees. Wet miombo
carbon storage capacities could be increased regionally in the event of increased fire protection.

miombo --- Lubumbashi --- Mikembo --- allométrie --- carbon --- carbone --- stock --- storage --- dry forest --- structure --- architecture --- RDC --- DRC --- Congo --- forêt --- savane --- forest --- AGB --- savanna --- woodland --- forêt claire --- surface terrière --- Marquesia --- Brachystegia --- Julbernardia --- houppier --- hauteur --- Afrique --- australe --- PCA --- ACP --- Africa --- biomasse --- zambézien --- dispositif d'inventaire permanent --- permanent inventory system --- muhulu --- Sciences du vivant > Sciences de l'environnement & écologie

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Forêt tropicale --- Tropical forests --- Savane --- Savannas --- Aménagement forestier --- Forest management --- Biodiversité --- Biodiversity --- Brûlage --- Burning --- Écologie forestière --- forest ecology --- Étude de cas --- case studies --- Structure de la population --- population structure --- Dynamique des populations --- population dynamics --- Population végétale --- plant population --- Celtis --- Grewia --- Combretum --- 581.526.42 --- 574.472 --- <676.1> --- Forest formations --- Oeganda. Uganda --- Theses --- <676.1> Oeganda. Uganda --- 574.472 Biodiversity --- 581.526.42 Forest formations --- Forest conservation --- Forest plants --- Plant diversity conservation --- Plant diversity --- Vegetation dynamics --- Dynamics of vegetation --- Acclimatization (Plants) --- Plant communities --- Vegetation and climate --- Botanical diversity --- Diversity, Plant --- Floristic diversity --- Plant biodiversity --- Plant biological diversity --- Conservation of plant diversity --- Biodiversity conservation --- Plant conservation --- Forest botany --- Forest flora --- Forest vegetation --- Forest wildlife plants --- Forest-zone plants --- Wildlife plants, Forest --- Woodland plants --- Woodland vegetation --- Forests and forestry --- Plants --- Woodland garden plants --- Conservation of forests --- Forest preservation --- Preservation of forests --- Nature conservation --- Deforestation --- Conservation --- Control --- Uganda --- Reserve forestiere de budongo --- Uvariopsis congensis --- Funtumia elastica --- Caloncoba schweinfurthii --- Holoptelea grandis --- Diospyros abyssinica --- Tapura fischeri --- Terminalia velutina --- Albizia grandbracteata