Lucas MazalVetAgro Sup
Lucas Mazal
PhD
Maître de conférences en écologie / Associate professor of ecology
VetAgroSup Campus Agronomique - UMR UREP
About
17
Publications
830
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
6
Citations
Citations since 2017
Introduction
My work focuses on the study of interactions between plants (competition, facilitation, cooperation) and environnemental factors (drought and various stresses in the light of the stress gradient hypothesis).
Additional affiliations
April 2022 - December 2022
Position
- PostDoc Position
Description
- My post-doctorate, as part of the NUMRIP work package "Plant traits", aims at identifying and characterizing riparian plant guilds in relation to their responses and effects on hydrogeomorphological constraints, in particular on substrate stability and sediment trapping. The aim will be to associate functional plant traits with hydrogeomorphological processes and fluvial forms using functional trait approach tools and remote sensing techniques.
September 2017 - December 2021
Position
- PhD Student
Description
- I used the kin recognition and selection framework to explore the role of relatedness in interactions between individuals of Populus nigra. I looked for the presence of related individuals in natural population by studying the spatial genetic structure. I conducted a series of large-scale experiments under controlled conditions and in natural conditions to identify the types of interactions between young black poplars in relation to their relatedness and different natural constraints (drought)
Education
September 2016 - June 2017
September 2014 - August 2016
September 2011 - August 2014
Publications
Publications (17)
Riparian ecosystems are highly dependent on feedbacks between vegetation dynamics and hydrogeomorphic components. Physical constraints on vegetation support a mosaic of heterogeneous habitats that support high biological diversity and provide many ecosystem services. Most European rivers have undergone anthropogenic alterations such as channelizati...
The Black poplar is a pioneer tree species occurring along many river courses across Europe. Seedlings establish at very high density and experience various stresses (e.g., hydric, mechanical). In a previous study conducted in 2017 on the same population we described the fine-scale genetic structure (FSGS) of three age cohorts (5, 10 and > 20 years...
The Black poplar (Populus nigra) is a pioneer tree species in European rivers that colonises alluvial banks in very high densities. Under these conditions, the main interaction between young individuals should be competition. However, it has been observed that black poplar individuals, by modifying their environment in high density through a proces...
Black poplar (Populus nigra L.) is a pioneer tree species in European rivers that colonises alluvial banks in very high densities. Indirect positive interactions (i.e. facilitation) between young black poplars are already documented. However, the nature of direct interactions between young individuals remains unknown. The conceptual framework of ki...
Context and problematic
Populus nigra L. (Salicaceae) seedlings grow in high densities in stressful environment. Individual plants interact mostly with their
direct neighbors. Spatial genetic structure (SGS) indicates the presence of related individuals close to each other. Thus, SGS pattern
can influence what type of biotic interaction (positive o...
Spatial genetic structure (SGS) studies contribute to our understanding of gene flow and species dispersal. Only a few studies have linked the spatio-temporal pattern of SGS and intra-specific interactions. Black poplar (Populus nigra L.) is a threatened pioneer riparian tree species along many rivers across Europe. We studied its SGS in cohorts of...
The African tulip tree Spathodea campanulata is a major invasive species on the island of Tahiti (French Polynesia), where it has established from sea level up to montane cloud forest. This invader continues to spread across the island; however, little information is available about the seed rain and germination rate of Spathodea seeds. In this stu...
Within rivers, riparian trees such as poplars or willows respond to the flood regime, but they also control
hydrogeomorphological processes and fluvial landform dynamics. It is now recognized that feedbacks between riparian
trees and hydrogeomorphological processes occur during their life, leading to the emergence of biogeomorphological
units such...
L’arbre Spathodea campanulata (Tulipier du Gabon) est une espèce envahissante introduite sur l’île tropicale de Tahiti (archipel de la Société) dans les années 1930 comme plante ornementale et déclarée « une menace pour la biodiversité en Polynésie française » par l’arrêté n°244CM du 12 février 1998. Aucune étude n’a porté sur la pluie de graines e...
We studied its SGS in cohorts of varying ages at a fine-scale (i.e. at distances including the zone of influence between individuals) to better understand local patterns of dispersal and intra-specific interactions during early life-stages. We genotyped 349 P. nigra individuals in three gravel bars along a 1.6 km reach of the Allier River in the Ré...
New global exchanges represent a new vector for species to extend their range and reach new ecosystems. Long-distance seed dispersal is a mechanism which allow plants to spread their seeds on long distances and so to ensure population viability. In French Polynesia the African tulip tree Spathodea campanulata has been introduced and is now reported...
We studied its SGS in cohorts of varying ages at a fine-scale (i.e. at distances including the zone of influence between individuals) to better understand local patterns of dispersal and intra-specific interactions during early life-stages. We genotyped 349 P. nigra individuals in three gravel bars along a 1.6 km reach of the Allier River in the Ré...
We studied its SGS in cohorts of varying ages at a fine-scale (i.e. at distances including the zone of influence between individuals) to better understand local patterns of dispersal and intra-specific interactions during early life-stages. We genotyped 349 P. nigra individuals in three gravel bars along a 1.6 km reach of the Allier River in the Ré...
Projects
Projects (3)
The project focuses on riparian vegetation, from the scale of individuals to plant communities. The model integrates vegetation as a dynamic component of the system, which responds to and affects hydrogeomorphic processes and river forms.
As part of the "Plant traits" work package of the NUMRIP project, my project aims at identifying and characterizing riparian plant guilds in relation to their responses and effects on hydrogeomorphological constraints, in particular on substrate stability and sediment trapping. The aim will be to associate functional plant traits (morphological, biomechanical, phenological and physiological traits) with hydrogeomorphological processes and fluvial forms using functional trait approach tools and remote sensing techniques.
Understand the intra-specific interactions among Populus nigra and their ecosystem engineering effects in a biogeomorphological context. I conducted an in situ experiment in the river Allier (France) and a greenhouse experiment where I study the competition between poplars according to their relatedness in a stressful condition. I also study the spatial genetic structure of P.nigra in natural population (River Allier, France) using genetic methods based on microsatellite.
Evaluate the spread of Spathodea on this island by involving ecological trait, habitats, wind dispersal, anthropogenic uses and history of lands.
