Lucas Deschamps

Lucas Deschamps
Université du Québec à Trois-Rivières · Département des Sciences de l'Environnement

Master of Science

About

13
Publications
3,804
Reads
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47
Citations
Additional affiliations
September 2016 - present
Université du Québec à Trois-Rivières
Position
  • Lecturer
Description
  • In charge of the laboratory part of the course "Vascular Plants Taxonomy"
September 2015 - present
Université du Québec à Trois-Rivières
Position
  • Tutor
January 2015 - May 2016
Université du Québec à Trois-Rivières
Position
  • Research Assistant
Description
  • Impact of UVR on the morphogenesis of Yellow Perch. Yellow Perch rearing. Zooplankton count.
Education
June 2016 - June 2017
Université du Québec à Trois-Rivières
Field of study
  • Environmental Sciences
September 2014 - April 2016
Université du Québec à Trois-Rivières
Field of study
  • Biological and Ecological Sciences

Publications

Publications (13)
Article
Full-text available
Nutrient availability for tundra vegetation could change drastically due to increasing temperatures and frequency of nitrogen deposition in the Arctic. Few studies have simultaneously examined the response of plant communities to these two pressures over a long period. This study aims to assess which driver between increasing nitrogen (N) and phosp...
Article
Full-text available
Anthropogenic changes can have dramatic effects on wild populations. Moreover, by promoting the emergence of vector-borne diseases in many ecosystems, those changes can lead to local extinction of native wildlife. One of those diseases, avian malaria, has been shown to be on the rise in New Zealand, threatening native bird species that are among th...
Article
The functional traits of organisms within multispecies assemblages regulate biodiversity effects on ecosystem functioning. Yet how traits should assemble to boost multiple ecosystem functions simultaneously (multifunctionality) remains poorly explored. In a multibiome litter experiment covering most of the global variation in leaf trait spectra, we...
Article
Full-text available
Geese can profoundly affect arctic ecosystems directly (e.g., by grazing vegetation) and indirectly (e.g. by changing nutrient cycling resulting from faces inputs and by reducing plant litter). In the Arctic, behavior and abundance of geese have changed due to climate and land-use change. While the short-term effects of increased goose populations...
Article
Full-text available
The way species avoid each other in a community by using resources differently across space and time is one of the main drivers of species coexistence in nature1,2. This mechanism, known as niche differentiation, has been widely examined theoretically but still lacks thorough experimental validation in plants. To shape niche differences over time,...
Preprint
Full-text available
Explaining the existence of highly diverse plant communities under strong abiotic filtering is a long-standing challenge in ecology. Hierarchical aspects of abiotic and biotic filters are rarely taken into account and studies focus mainly on community-level aggregated patterns. Because variations in biotic conditions might take place in short abiot...
Article
Neonicotinoids (NEOCs) are insecticides that are widely used worldwide in the culture of maize and soya. Whereas they specifically target terrestrial insects by acting as agonists of the neurotransmitter acetylcholine in their nervous system, their effects on the cholinergic system of vertebrates is still unclear. Moreover, there is an increasing c...
Method
Full-text available
This paper describes simply the principles behind latent factor models and proposes an efficient formulation implemented in the Hamiltonian Monte Carlo software stan to reveal latent variables structuring community matrix. We considered abundances as following a poisson distribution, but this code can be modified to work with any distribution of in...
Poster
Full-text available
Wetland ecosystems are changing, both in species composition and functional structure. To understand the direction and amplitude of these changes, ecologists study the dynamics of plant functional traits. This can be done by studying the dominance, or central tendency, of plant functional traits along a gradient of environmental conditions. However...

Questions

Questions (2)
Question
Hello!
In the aim of linking the result of a non destructive chlorophylle and flavonoids estimator (Dualex) to the chemical concentrations of different species' leaves, we would measure pigments concentration spectrophotometrically.
We have developped a protocol of methanol extraction, based on litterature. However, we will use a spectrophotometer with plates with different properties than the cuvette used in studies providing equations linking absorbance and concentration.
Which commercial products should we choose to calibrate the parameters of those equations? We want to obtain a measure of total chlorophyll content and a proxy of flavonoids concentration.
Thank you!
Question
Hello,
We will measure chlorophyll content of a great number of plants in field, with a dualex. We will also collect leaves to measure other physical traits.
I would store some of them to quantify chl content after field campaign, in the aim of calibrating dualex measures. Is there a valid way to do so?
Thanks!
Lucas Deschamps

Network

Cited By

Projects

Projects (2)
Project
The goal of this project is to explore multivariate bayesian models through a serie of tutorial or papers.
Project
We will describe the variations of wetland vegetation's functional structure in response to soil pH and species diversity, the latter being nested in the former. Here, species diversity is considered as a proxy of the intra-species vs. inter-species competition, while soil pH is considered as a species-filtering abiotic factor. As such, we aim to disentangle the effect of competition from the effect of environmental filtering. We predict that the mean and the variance of trait distribution will show greater response to soil pH, while the skewness and kurtosis will capture the residual effect of species diversity. The originality of our approach comes from establishing the shape of the distribution of individual's trait values, as well as considering different kind of traits : (i) slow vs fast response traits (e.g. LDMC vs. chlorophyl content); (ii) competitive ability vs niche difference traits (e.g. height vs. phenology).