Olivier Martin-Ducup

Olivier Martin-Ducup
Institute of Research for Development | IRD · 123 - Plant Architecture, Functioning and Evolution (AMAP)

PhD
Freelance researcher in remote sensing and Forest ecology.

About

18
Publications
4,983
Reads
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200
Citations
Additional affiliations
September 2012 - June 2017
Université du Québec à Rimouski UQAR
Position
  • PhD Student

Publications

Publications (18)
Article
Full-text available
Background Individual tree extraction from terrestrial laser scanning (TLS) data is a prerequisite for tree-scale estimations of forest biophysical properties. This task currently is undertaken through laborious and time-consuming manual assistance and quality control. This study presents a new fully automatic approach to extract single trees from...
Article
Full-text available
UAV laser scanning (ULS) has the potential to support forest operations since it provides high-density data with flexible operational conditions. This study examined the use of ULS systems to estimate several tree attributes from an uneven-aged northern hardwood stand. We investigated: (1) the transferability of raster-based and bottom-up point clo...
Article
Background and aims Terrestrial LiDAR scanning (TLS) data are of great interest in forest ecology and management because they provide detailed 3D information on tree structure. Automated pipelines are increasingly used to process TLS data and extract various tree- and plot-level metrics. With these developments comes the risk of unknown reliability...
Method
Full-text available
Provides a set of tools to make quantitative structural model of trees (i.e the so-called 'QSM') from LiDAR point cloud, to manipulate and visualize the QSMs as well as to compute metrics from them. It can be used in various context of forest ecology (i.e biomass estimation) and tree architecture (i.e architectural metrics). The package is based on...
Article
To fulfill their growth and reproductive functions, trees develop a three‐dimensional structure that is subject to both internal and external constraints. This is reflected by the unique architecture of each individual at a given time. Addressing the crown dimensions and topological structure of large tropical trees is challenging considering their...
Article
Full-text available
Wood density (WD) relates to important tree functions such as stem mechanics and resistance against pathogens. This functional trait can exhibit high intraindividual variability both radially and vertically. With the rise of LiDAR-based methodologies allowing nondestructive tree volume estimations, failing to account for WD variations related to tr...
Article
Full-text available
Kernels found in stone pinecones are of great economic value, often surpassing timber income for most forest owners. Visually evaluating cone production on standing trees is challenging since the cones are located in the sun-exposed part of the crown, and covered by two vegetative shoots. Very few studies were carried out in evaluating how new remo...
Article
A model comparison approach, based on the Akaike’s information criterion, was used to evaluate the contribution of terrestrial laser scanning (TLS) to the estimation of wood fiber attributes at the tree level for black spruce (Picea mariana (Mill.) B.S.P.) trees growing in Newfoundland, Canada. Substantial efforts were made to acquire, process, and...
Article
Full-text available
The material distribution inside tree crowns is difficult to quantify even though it is an important variable in forest management and ecology. The vertical distribution of a relative density index (i.e., vertical profile) of the total, woody, and leafy material at the crown scale were estimated from terrestrial laser scanner (TLS) data on two spec...
Thesis
Full-text available
The canopy structure plays many roles in the processes occurring in forest ecosystems. Canopy structure can be defined as the position, size and shape of the tree crowns that compose it. It can be studied at the stand or at the tree scale. The dimensions, complexity and longevity of trees make it hard to study the canopy. In the last decade, LiDAR...
Conference Paper
Full-text available
Terrestrial LiDAR (TLidar) is an emerging technology that has high potential for forestry applications. It provides a detailed three‐dimensional (3D) point cloud representation of forest structure at tree‐ and plot‐level from which a wide range of forest attributes could be extracted with appropriate methods. Consequently, TLidar potentially offers...
Article
Characterizing tree crown structure and quantifying its relationships with the surrounding environment is of critical importance in forest ecology and management. These relationships depend heavily on species plasticity and local competition for light. It is however difficult to study forest canopies due to their inaccessibility and complexity. The...
Article
Background and aims: Trees invest in both primary (e.g. height) and secondary (e.g. diameter) growth. The trade-off between these investments varies between species and changes with the tree growing environment. To better establish this trade-off, readily available allometric exponents relating height to diameter at breast height (γh,dbh) and stem...
Conference Paper
Full-text available
Highlights: Terrestrial laser scanning (TLS) data was used to quantify sugar maple crown metrics and local environment structure indices. It allows quantifying how crown plasticity, potential tree light interception and local environment structure are influenced by stand composition (pure vs mixed).
Article
1. Niche differentiation is a key issue in the current debate on community assembly mechanisms. In highly diverse moist tropical forests, tree species sensitivity to canopy openness is thought to be a major axis in niche differentiation. In the past, the syndrome of traits driving the demographic trade-off involved in the niche-based theory of coex...

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