Lahcen Benomar

Lahcen Benomar
Ministry of Northern Development, Mines, Natural Resources and Forestry · Ontario Forest Research Institute

Ph.D Environmental sciences

About

35
Publications
22,999
Reads
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943
Citations
Introduction
I am interested in understanding the functional responses of plants to biotic and abiotic stress over a range of temporal and spatial scales. I explore traits coordination, plasticity and local adaptation as key inputs to improve ecophysiological modelling and traits based selection approach for sustainable productivity under climate change.
Additional affiliations
January 2017 - present
Laval University
Position
  • Lecturer
Description
  • Bio-2910; Tree physiology. https://www.ulaval.ca/les-etudes/cours/repertoire/detailsCours/bio-2910-physiologie-de-larbre.html#horaire
January 2013 - December 2017
Laval University
Position
  • PostDoc Position
May 2006 - May 2012
Université du Québec en Abitibi-Témiscamingue
Position
  • PhD Student

Publications

Publications (35)
Article
Full-text available
Global warming is predicted to extend the growing season of trees and plants, and advance spring phenology. However, intensification of extreme climate events in mid-latitude forests, from weakening of the jet stream and atmospheric blockings, may expose trees to increased risk associated with more frequent late-spring frosts. Still, little is know...
Article
Full-text available
Purpose of Review Assisted migration is increasingly proposed as a proactive management strategy to mitigate the consequences of maladaptation predicted under climate change. Exploring the social and academic structure of the field, its research gaps, and future research directions can help further the understanding and facilitate the implementatio...
Article
Full-text available
The increased use of fertilizers in agriculture and forest and horticulture nurseries contributes to the pollution of water resources and greenhouse gas emissions. The objective of this study is to evaluate a new generation of fertilizers coated with new biodegradable polymers in terms of physical quality, release kinetics, and their effect on redu...
Article
Full-text available
Mesophyll conductance (gm) determines the diffusion of CO2 from the substomatal cavities to the site of carboxylation in the chloroplasts and represents a critical component of the diffusive limitation of photosynthesis. In this study, we evaluated the average effect sizes of different environmental constraints on gm in Populus spp., a forest tree...
Preprint
Full-text available
Mesophyll conductance ( g m ) determines the diffusion of CO 2 from the substomatal cavities to the site of carboxylation in the chloroplasts and represents a critical limiting factor to photosynthesis. In this study, we evaluated the average effect sizes of different environmental constraints on g m in Populus spp., a forest tree model. We collect...
Article
Full-text available
A strong differentiation of bud set among natural populations may lead to limited adaptive capacity of seed sources during assisted population migration. The present study aimed to fill gaps regarding the dynamic nature of bud set and its variation among genetically improved white spruce (Picea glauca [Moench] Voss) seed sources used in the refores...
Article
Full-text available
Plant traits—the morphological, anatomical, physiological, biochemical and phenological characteristics of plants—determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research sp...
Article
Full-text available
The mechanistic bases of thermal acclimation of net photosynthetic rate (An) are still difficult to discern, and the data sets available are scarce, particularly for hybrid poplar. In the present study, we examined the contribution of a number of biochemical and biophysical traits on thermal acclimation of An for two hybrid poplar clones. We grew c...
Data
Analysis of variance, F and P values for thermal acclimation-related traits. (PDF)
Data
Western blot of RuBisCO and RuBisCO activase for two hybrid poplar clones (M×N and M×B) under combinations of growth temperature (23°C and 33°C) and nitrogen level (high level: HN and low level: LN). (PDF)
Data
P value and R2 of curves in Figs 1, 2 and 3. (PDF)
Preprint
Full-text available
The mechanistic bases of thermal acclimation of net photosynthetic rate (An) are still difficult to discern and empirical research remains limited, particularly for hybrid poplar. In the present study, we examined the contribution of a number of biochemical and biophysical traits on thermal acclimation of An for two hybrid poplar clones. We grew cu...
Poster
Full-text available
Les changements climatiques prévus causeraient un déplacement rapide vers le nord et en altitude des conditions favorables aux essences forestières, conduisant à des mésadaptations locales. Parmi les stratégies possibles d’atténuation des changements climatiques, la migration assistée (MA), qui consiste à déplacer les sources génétiques utilisées e...
Article
Full-text available
Background and aims: Knowledge of thermal acclimation of physiological processes of boreal tree species is necessary to determine their ability to adapt to predicted global warming and reduce the uncertainty around the anticipated feedbacks of forest ecosystems and global carbon cycle to climate change. The objective of this work was to examine th...
Article
Full-text available
With climate change, favorable growing conditions for tree species are shifting northwards and to higher altitudes. Therefore, local populations are becoming less adapted to their environment. Assisted migration is one of the proposed adaptive measures to reduce the vulnerability of natural populations and maintain forest productivity. It consists...
Presentation
Full-text available
It has been projected that by 2050, global warming will lead to an increase in average daily temperature of at least 2 °C as well as an increase in frequency and duration of episodes of extreme heat and drought in the boreal region of Canada. As such, investigating the thermal acclimation potential of boreal tree species is important to (i) reduce...
Poster
Full-text available
Un déplacement vers le nord et vers les hautes altitudes des espèces arborescentes de la forêt boréale est prévu pour le futur en réponse au réchauffement du climat. La vitesse et l'intensité des changements climatiques dépasseraient toutefois les capacités adaptatives des espèces forestières. La « migration assistée » ou « délocalisation gérée » p...
Article
Full-text available
Because of changes in climatic conditions, tree seeds originating from breeding programs may no longer be suited to sites where they are currently sent. As a consequence, new seed zones may have to be delineated. Assisted migration consists of transferring seed sources that match the future climatic conditions to which they are currently adapted. I...
Article
Full-text available
Assisted population migration (APM) is the intentional movement of populations within a species range to sites where future environmental conditions are projected to be more conducive to growth. APM has been proposed as a proactive adaptation strategy to maintain forest productivity and to reduce the vulnerability of forest ecosystems to projected...
Article
Full-text available
Climate-related variations in functional traits of boreal tree species can result both from physiological acclimation and genetic adaptation of local populations to their biophysical environment. To improve our understanding and prediction of the physiological and growth responses of populations to climate change, we studied the role of climate of...
Research
Full-text available
La présente synthèse traite des incidences que peuvent avoir la gestion de la densité des peuplements naturels, l’espacement initial en plantation et la fertilisation sur le cycle de carbone et la qualité du bois d’œuvre résineux. La fertilisation améliore la qualité nutritionnelle du site permettant ainsi d’augmenter la croissance en diamètre des...
Data
Disease prevention, biodiversity, productivity improvement and ecological considerations are all factors that contribute to increasing interest in mixed plantations. The objective of this study was to evaluate early growth and productivity of two hybrid poplar clones, P. balsamif-era x trichocarpa (PBT) and P. maximowiczii x balsamifera (PMB), one...
Article
Full-text available
There is a growing interest in fast-growing hybrid poplar and willow plantations in Canada. This interest can be explained both by the rapid growth rate and high yield potential of this type of production system. However, their establishment and maintenance require considerable investments. Research efforts on productivity comparisons between diffe...
Article
Full-text available
Disease prevention, biodiversity, productivity improvement and ecological considerations are all factors that contribute to increasing interest in mixed plantations. The objective of this study was to evaluate early growth and productivity of two hybrid poplar clones, P. balsamif-era x trichocarpa (PBT) and P. maximowiczii x balsamifera (PMB), one...
Article
Full-text available
Disease prevention, biodiversity, productivity improvement and ecological considerations are all factors that contribute to increasing interest in mixed plantations. The objective of this study was to evaluate early growth and productivity of two hybrid poplar clones, P. balsamif-era x trichocarpa (PBT) and P. maximowiczii x balsamifera (PMB), one...
Thesis
Full-text available
Cette thèse avait pour objectifs i) d'étudier la réponse morphologique et physiologique du peuplier hybride aux variations de l'intensité de la compétition intraclonale, ii) de comparer la productivité des plantations pures vs mixtes de peuplier hybride avec celles de l'épinette blanche ou de Norvège et iii) de développer un modèle éco-physiologiqu...
Article
Full-text available
Intra-clonal competition was studied in young hybrid poplar plantations to assess the effects of spacing on growth, biomass production and allocation, and morpho-logical characteristics of above-and below-ground tree parts. Three spacings were used as whole-plots (1 9 1 m, 3 9 3 m and 5 9 5 m), with two hybrid poplar clones as subplots (BT747, Popu...
Article
Full-text available
Photosynthesis is the most important process driving productivity, and its acclimation to intraclonal competition is not well understood in hybrid poplars. The aim of this study was to examine the physiological response of the crown of two hybrid poplar clones, BT747215 (Populus balsamifera L. x Populus trichocarpa Torr. & A. Gray) and MB915319 (Po...

Questions

Questions (3)
Question
Indices of phenotypic plasticity commonly used is the relative distance plasticity index  (RDPI) (VALLADARES et al 2006).
Question
Biochemical model of C3 photosynthesis and mesophyll diffusion conductance to CO2.

Network

Cited By

Projects

Projects (2)
Project
This project aims to better understand the physiological drivers of productivity of short rotation poplar plantations and their interaction with environmental factors.
Project
The project examines the thermal acclimation of photosynthesis and respiration of two white spruce seed sources along a regional climatic gradient. We focus on temperature sensitivitie of Vcmax, Jmax, gm and gs.