8 Dokumente gefunden

A Comparison of Tree Segmentation Methods for Savanna Tree Extraction from TLS Point Clouds

aus: Land
Detecting trees accurately from terrestrial laser scanning (TLS) point clouds is crucial for processing terrestrial LiDAR data in individual tree analyses. Due to the heterogeneity of savanna ecosystems, our understanding of how various segmentation methods perform on savanna trees remains limited. Therefore,…
Basel: MDPI, 2025-08-30

Quantifying Tree Structural Change in an African Savanna by Utilizing Multi-Temporal TLS Data

Structural changes in savanna trees vary spatially and temporally because of both biotic and abiotic drivers, as well as the complex interactions between them. Given this complexity, it is essential to monitor and quantify woody structural changes in savannas efficiently. We implemented a non-destructive…
Basel: MDPI, 2025-02-22

Individual Tree-Scale Aboveground Biomass Estimation of Woody Vegetation in a Semi-Arid Savanna Using 3D Data

Allometric equations are the most common way of assessing Aboveground biomass (AGB) but few exist for savanna ecosystems. The need for the accurate estimation of AGB has triggered an increase in the amount of research towards the 3D quantification of tree architecture through Terrestrial Laser Scanning…
Basel: MDPI, 2024-01-19

Spatio-temporal mixed pixel analysis of savanna ecosystems : A review

Reliable estimates of savanna vegetation constituents (i.e., woody and herbaceous vegetation) are essential as they are both responders and drivers of global change. The savanna is a highly heterogenous biome with high variability in land cover types while also being very dynamic at both temporal and…
Basel: MDPI, 2021-09-27

Terrestrial laser scanning for vegetation analyses with a special focus on savannas

Savannas are heterogeneous ecosystems, composed of varied spatial combinations and proportions of woody and herbaceous vegetation. Most field-based inventory and remote sensing methods fail to account for the lower stratum vegetation (i.e., shrubs and grasses), and are thus underrepresenting the carbon…
Basel: MPDI, 2021-01-31

Contemporary erosion rates in the Kruger National Park, South Africa, inferred from reservoir siltation surveys

Soil erosion by water is a major environmental issue that affects about 70% of South Africa's land surface and leads to significant environmental and economical costs. In the view of soil conservation, erosion caused by natural conditions (e.g., climate, relief, soils) must be considered largely unavoidable,…

Support of Forest Inventory Data Collection by Citizen Scientists

Precise forest inventory data are requested by a wide range of users such as scientists, politicians, administrators, forest owners, or the forest industry. One forest inventory parameter of great importance is the forest stem volume (or growing stock volume, GSV). On the one hand, GSV is related to…

Landschaftswandel im Thakkhola : Untersuchungen zur Landschaftsgenese im semi-ariden Hochgebrige Nepals seit dem Jungpleistozän

Im Rahmen des DFG-Schwerpunktprogramms „Siedlungsentwicklung und Staatenbildung im Tibetischen Himalaya“ wurden Untersuchungen zum Landschaftswandel im Thakkhola (Mustang District, Nepal) durchgeführt. Dies nördlich des Himalaya-Hauptkamms gelegene Einzugsgebiet der Kali Gandaki (≈ 28°45‘N / 83°45‘E)…