Thalès de Haulleville
A5055415613- Forest ecology and management
- Ecology and Vegetation Dynamics Studies
- Species Distribution and Climate Change
- Plant Water Relations and Carbon Dynamics
- Remote Sensing and LiDAR Applications
- Tree-ring climate responses
- African Botany and Ecology Studies
- Plant and animal studies
- Land Use and Ecosystem Services
- Conservation, Biodiversity, and Resource Management
- Fire effects on ecosystems
- Tree Root and Stability Studies
- Remote Sensing in Agriculture
- Atmospheric and Environmental Gas Dynamics
- Agriculture and Rural Development Research
- French Urban and Social Studies
- African Studies and Ethnography
- Forest Management and Policy
- Environmental, Ecological, and Cultural Studies
- Botany and Plant Ecology Studies
- Plant Taxonomy and Phylogenetics
- Environmental Impact and Sustainability
- Ecosystem dynamics and resilience
- Forest Ecology and Biodiversity Studies
- Animal Ecology and Behavior Studies
Royal Museum for Central Africa
2013-2025
Ghent University Hospital
2021-2024
University of Liège
2012-2020
Gembloux Agro-Bio Tech
2013-2020
We report above-ground biomass (AGB), basal area, stem density and wood mass estimates from 260 sample plots (mean size: 1.2 ha) in intact closed-canopy tropical forests across 12 African countries. Mean AGB is 395.7 Mg dry ha⁻¹ (95% CI: 14.3), substantially higher than Amazonian values, with the Congo Basin contiguous forest region attaining values (429 ha⁻¹) similar to those of Bornean forests, significantly greater East or West forests. therefore appears generally palaeo- compared...
Thermal sensitivity of tropical trees A key uncertainty in climate change models is the thermal forests and how this value might influence carbon fluxes. Sullivan et al. measured stocks fluxes permanent forest plots distributed globally. This synthesis plot networks across climatic biogeographic gradients shows that dominated by high daytime temperatures. extreme condition depresses growth rates shortens time resides ecosystem killing under hot, dry conditions. The effect temperature worse...
Trees structure the Earth's most biodiverse ecosystem, tropical forests. The vast number of tree species presents a formidable challenge to understanding these forests, including their response environmental change, as very little is known about species. A focus on common may circumvent this challenge. Here we investigate abundance patterns using inventory data 1,003,805 trees with trunk diameters at least 10 cm across 1,568 locations
Large tropical trees and a few dominant species were recently identified as the main structuring elements of forests. However, such result did not translate yet into quantitative approaches which are essential to understand, predict monitor forest functions composition over large, often poorly accessible territories. Here we show that above-ground biomass (AGB) whole can be predicted from large relationship is proved strikingly stable in 175 1-ha plots investigated across 8 sites spanning...
Abstract Aim Large tropical trees form the interface between ground and airborne observations, offering a unique opportunity to capture forest properties remotely investigate their variations on broad scales. However, despite rapid development of metrics characterize canopy from sensed data, gap remains aerial field inventories. To close this gap, we propose new pan‐tropical model predict plot‐level structure biomass only largest trees. Location Pan‐tropical. Time period Early 21st century....
Significance The responses of tropical forests to heat and drought are critical uncertainties in predicting the future impacts climate change. 2015–2016 El Niño Southern Oscillation (ENSO) resulted unprecedented low precipitation across tropics, including very poorly studied African forest region. We assess ENSO using on-the-ground measurements. Across 100 long-term plots, record high temperatures did not significantly reduce carbon gains from tree growth or increase losses mortality....
Context Wood specific gravity is a key element in tropical forest ecology. It integrates many aspects of tree mechanical properties and functioning an important predictor biomass. varies widely among within species also individual trees. Notably, contrasted patterns radial variation wood have been demonstrated related to regeneration guilds (light demanding vs. shade-bearing). However, although being repeatedly invoked as potential source error when estimating the biomass trees, both...
Understanding how the traits of lineages are related to diversification is key for elucidating origin variation in species richness. Here, we test whether richness among trees from all major biogeographical settings lowland wet tropics. We explore mortality rate, breeding system and maximum diameter richness, either directly or via associations with range size, 463 genera that contain tropical forest trees. For Amazonian genera, also mean species-level size. Lineages higher rates—faster...
Planting forests is an important practice for climate change mitigation, especially in the tropics where carbon (C) sequestration potential high. Successful implementation of this mitigation requires knowledge role species identity and diversity on accrual plantations. Despite need, solid data long‐term development forest plantations are still very scarce. Monospecific two mixture plots a 77‐year‐old tree experiment Yangambi Congo basin were fully inventoried. We calculated above‐ground C...
Given the impact of tropical forest disturbances on atmospheric carbon emissions, biodiversity, and ecosystem productivity, accurate long-term reporting Land-Use Land-Cover (LULC) change in pre-satellite era (<1972) is an imperative. Here, we used a combination historical (1958) aerial photography contemporary remote sensing data to map changes extent structure surrounding Yangambi (DR Congo) central Congo Basin. Our study leveraged structure-from-motion convolutional neural network-based...
Abstract Questions Is there any theoretical model enabling predictions of the optimal tree size distribution in tropical communities? Can we use such a framework for quantifying degree disturbance? Location Reserve Yangambi, northeast region Democratic Republic Congo. Methods We applied an allometric based on assumption that virtually undisturbed forest uses all available resources. In this condition, structure (e.g. distribution) is theoretically predictable from scaling crown with height...
<title>Abstract</title> Preserving and restoring terrestrial ecosystems is crucial to halting the collapse of life on Earth. To guide global conservation restoration efforts, we present a comprehensive map, encompassing all ecosystems, revealing Earth's potential tree, short vegetation, bareground cover accounting for various land management scenarios such as prescribed fire frequency trophic rewilding. Our analysis indicates that 43% (5678 Mha) lands could be covered by trees, 39% (5179...