Marc Lucotte

Marc Lucotte
Université du Québec à Montréal | UQAM · Department of Earth and Atmospheric Sciences

Ph.D.

About

253
Publications
49,161
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
9,588
Citations
Additional affiliations
January 1990 - present
Université du Québec à Montréal
Position
  • Professor (Full)
Description
  • http://www.ise.uqam.ca/
January 1990 - present
Université du Québec à Montréal
Position
  • Professor (Full)
Description
  • http://www.geotop.ca/fr/

Publications

Publications (253)
Article
Full-text available
Lignin CuO oxidation byproducts have been successfully used as biomarkers to describe terrigenous organic matter (TOM) dynamics in the environment in particular to understand various pedological processes. The fact that the major lignin biomarkers data-set used in environmental studies in temperate zones across the globe is based on pure vegetal sa...
Article
Full-text available
The fluctuations of mercury levels (Hg) in fish consumed by sport fishers in North-Eastern America depend upon a plethora of interrelated biological and abiological factors. To identify the dominant factors ultimately controlling fish Hg concentrations, we compiled mercury levels (Hg) during the 1976–2010 period in 90 large natural lakes in Quebec...
Article
Full-text available
The majority of the studies attempting to explain fluctuations of mercury (Hg) concentrations in fish from diverse aquatic ecosystems have invoked the influence of physico-chemical or environmental factors but has eluded that of strictly biological factors. In this study, we examine the relationship between Hg concentrations in walleye (Sander vitr...
Article
Full-text available
Mercury (Hg) contamination of riparian communities and of environmental compartments of the Amazon can be directly related to the occupation of the territory. The objective of this study was to identify the characteristics of aquatic environments that are associated with high levels of Hg in ichthyofauna. Our research aimed at determining the influ...
Article
Aqueous glyphosate transport across narrow riparian buffer strips (RBS) is little studied. • RBS efficiency for reducing glyphosate and AMPA leaching to streams is limited. • Spontaneous herbaceous vegetation RBS is as efficient as Salix plantations. • Glyphosate, present in runoff after a year, suggest unexpected persistence. • RBS may favor glyph...
Article
Full-text available
The use of glyphosate-based herbicides (GBHs) in industrial agriculture has intensified in the past decades, causing a growing concern about the occurrence and spatial distribution of glyphosate and its principal metabolite, aminomethylphosphonic acid (AMPA), in the environment. In 2014, glyphosate and AMPA content was measured in 45 soils from the...
Article
The addition of organic matter (OM) containing glyphosate during compost production, through the introduction of contaminated plant residues or sewage sludge, presents a risk of hindering the proper OM breakdown carried out by microorganisms and causing the accumulation of glyphosate or aminomethylphosphonic acid (AMPA). To measure the effect of gl...
Article
Full-text available
To avoid yield loss in field crops associated with glyphosate‐resistant weed and changes in their population dynamics, repeated applications of glyphosate‐based herbicides (GBH) and combination with other herbicides are weed management practices (WMP) increasingly used worldwide, and particularly so in southern Quebec (Canada). These practices affe...
Article
Terrestrial organic matter (TOM) exported to nearshore marine regions may be altered by drought or large amounts of precipitation. We examined how significant precipitation in southern California during the winter seasons of 2015 and 2016, following a prolonged drought from 2011 to 2015, impacted the quantity and quality of TOM transported to nears...
Article
Full-text available
Nations' food consumption patterns are increasingly globalized and trade dependent. Natural resources used for agriculture (e.g., water, pollinators) are hence being virtually exchanged across countries. Inspired by the virtual water concept, we, herein, propose the concept of virtual biotic pollination flow as an indicator of countries' mutual dep...
Article
Reducing adverse environmental consequences of modern industrial agriculture requires an ecological transition of agricultural practices. An important determinant of adoption of new agricultural practices by producers is the perceived profitability of these practices. The profitability of ecological agricultural practices tends to rely on improved...
Article
Full-text available
Weed management (WM) is necessary to prevent crop losses through competition with weeds and maintain high yields. However, in the case of glyphosate‐tolerant (GT) crops, phytotoxic effects can occur after glyphosate‐based herbicide (GBH) applications, which could impact yields and quality. In order to assess the agronomic performance of six WM stra...
Article
Repeated applications and combination of glyphosate-containing herbicides (GCH) with other herbicides are two weed management practices (WMP) used to compensate for GCH decreasing efficiency impacts in field crops. These practices may have serious impacts on soil functions since GCH affect soil biota and soil biological activity (SBA). Two field ex...
Article
Full-text available
Background: Research on changing dietary practices is rare in lower and middle income countries, and understanding the impact of global economic processes on population health and nutrition is important, especially of rural communities. We analyzed the diet of 22 families in Brasília Legal, a riverside community in the Tapajós River region of the...
Article
Glyphosate-based herbicides (GBH) applications were reported to induce physiological damages to glyphosate-resistant (GR) soybean, which were mainly attributed to aminomethylphosphonic acid (AMPA). In order to study glyphosate and AMPA dynamics in plants and associated phytotoxic effects, a greenhouse experiment was set where GR soybeans were expos...
Article
Full-text available
Cet article vise à mieux comprendre pourquoi certains groupes religieux s’impliquent plus que d’autres dans les questions qui connectent l’environnement et la santé. Nous analysons les représentations sociales des groupes catholiques et évangéliques de communautés riveraines en Amazonie brésilienne. À partir de verbatim d’entretiens semidirigés con...
Article
In this study, we explore longitudinal tendencies of rural smallholder livelihoods in the Tapajós River region, in the area of influence of the BR-163 following two lines of inquiry: 1) have livelihoods changed since the early 2000s and if so, 2) how have they changed? Drawing on participant observations, life history interviews and cross-sectional...
Article
Full-text available
Riparian buffer strips (RBS) are encouraged to control agricultural diffuse pollution. In Quebec Province, Canada, a policy promotes 3-m-wide RBS. Abiding farmers minimally maintain herbaceous vegetation, but nutrient retention efficiency could be improved with woody biomass. This work aimed to assess if fast-growing willows (Salix miyabeana Seemen...
Article
Slash-and-burn agriculture practiced by several thousand small-scale farmers in the Tapajo´s region of the Brazilian Amazon has contributed to accelerated deforestation over the past decades. The present study aims to quantify and qualify changes in the transfer of terrestrial organic matter (TOM) to aquatic environments following deforestation. Li...
Article
Full-text available
Residual glyphosate from glyphosate based herbicides (GBH) are ubiquitously detected in streams draining agricultural fields, and may affect phytoplankton communities present in these ecosystems. Here, the effects of the exposure (96 h) of a phytoplankton community collected in an agricultural stream to various glyphosate concentrations (1, 5, 10,...
Article
The use of glyphosate-based herbicides in agriculture has increased steadily since the mid 90's and there is now evidence of glyphosate leaching and contamination of aquatic ecosystems. The aim of this study was to evaluate the effects of a glyphosate-based herbicide (Factor 540(®)) on growth and photosynthetic capacity of algae and cyanobacteria....
Article
We investigated the effects of different concentrations of glyphosate acid and one of its formulations (Roundup®) on seed germination of two glyphosate resistant (GR)- and one non-GR variety of soybean. As expected, the herbicide affected the shikimate pathway in non-GR seeds but not in GR seeds. We observed that glyphosate can disturb the mitochon...
Article
Full-text available
This perspective documents current thinking around climate actions in Canada by synthesizing scholarly proposals made by Sustainable Canada Dialogues (SCD), an informal network of scholars from all 10 provinces, and by reviewing responses from civil society representatives to the scholars’ proposals. Motivated by Canada’s recent history of repeated...
Article
Full-text available
We studied the physiological mechanisms involved in the deleterious effects of a glyphosate-based herbicide (Factor® 540) on photosynthesis and related physiological processes of willow (Salix miyabeana cultivar SX64) plants. Sixty-day-old plants grown under greenhouse conditions were sprayed with different rates (0, 1.4, 2.1 and 2.8 kg a.e ha-1) o...
Article
Full-text available
In the Tapajós River region of the Brazilian Amazon, mercury (Hg) is a prevalent contaminant in the aquatic ecosystem. Few studies have used comprehensive chronological analyses to examine the combined effects of environmental and anthropogenic factors on Hg accumulation in sediments. Total mercury (THg) content was measured in sediments from eight...
Article
In the Tapajos´s River region of the Brazilian Amazon, mercury (Hg) is a prevalent contaminant in the aquatic ecosystem. Few studies have used comprehensive chronological analyses to examine the combined effects of environmental and anthropogenic factors on Hg accumulation in sediments. Total mercury (THg) content was measured in sediments from eig...
Article
Full-text available
O presente estudo reporta as concentrações plasmáticas dos antioxidantes cobre (Cu), manganês (Mn), selênio (Se), zinco (Zn), β-caroteno, licopeno e vitaminas (A e E) em moradores da região do Rio Tapajós, Pará, Amazônia, e as relaciona com características sociodemográficas e sazonalidade (seca e cheia). Os teores de Mn, Se e Zn foram acima dos val...
Article
Full-text available
This paper summarises the results and achievements of an 8-year participatory research project (Caruso Project) carried out in the Tapajós Basin, representing the joint efforts of Brazilian and Canadian researchers in the study of the environmental dynamics of mercury, as well as the health effects on the fish-eating communities. It coupled scienti...
Article
Full-text available
The few lignin biomarker studies conducted in tropical environments are hampered by having to use references signatures established for plants and soils characteristic of the temperate zone. This study presents a lignin biomarker analysis (vanillyls (V), p-hydroxyls (P), syringyls (S), cinnamyls (C)) of the dominant plant species and soil horizons...
Conference Paper
Full-text available
Le lessivage des produits agro-chimiques est responsable de la dégradation de l’eau de surface et sous-terraine partout à travers le monde, particulièrement dans les zones sous agriculture intensive de maïs et de soya. L’excès de nutriments entraîne l’eutrophisation des cours d’eau. Le lessivage du glyphosate (l’herbicide le plus vendu au monde) af...
Article
Full-text available
Pressures on the Brazilian Amazon forest have been accentuated by agricultural activities practiced by families encouraged to settle in this region in the 1970s by the colonization program of the government. The aims of this study were to analyze the temporal and spatial evolution of land cover and land use (LCLU) in the lower Tapajós region, in th...
Article
Full-text available
Pressures on the Brazilian Amazon forest have been accentuated by agricultural activities practiced by families encouraged to settle in this region in the 1970s by the colonization program of the government. The aims of this study were to analyze the temporal and spatial evolution of land cover and land use (LCLU) in the lower Tapajós region, in th...
Article
Full-text available
Agroforestry systems are widely recognized as an important way to address numerous environmental challenges in tropical areas. They represent a sustainable alternative form of land-use for small-scale agriculture, responding to the economic development needs of communities and offering a number of ecosystem services. This article presents an evalua...
Article
Full-text available
We examined if smallholders that immigrated to the Amazon over the last 40 years (highway-era families) and households with historical ties to the region (rubber-era families) adopt different livelihood activities and land-use/ land-cover (LULC) patterns, in four communities along the Tapajós River in the Brazilian Amazon. Using quantitative data,...
Article
Full-text available
It is generally claimed that glyphosate kills undesired plants by affecting the 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) enzyme, disturbing the shikimate pathway. However, the mechanisms leading to plant death may also be related to secondary or indirect effects of glyphosate on plant physiology. Moreover, some plants can metabolize glyp...
Conference Paper
Regime shifts describe the sometimes rapid and abrupt changes of a system to an alternative stable state, whereby the structure of the system is changed. Shifts are often triggered by an external event and involve the crossing of a critical threshold. The notion of regime shifts is well documented in the systems ecology literature but has rarely be...
Article
Full-text available
The rising number of acute cases of Chagas disease in the State of Para, reported in the past two decades, has been associated, in part, with the ingestion of juice of local palm tree fruits, mainly acai berry and bacaba. Near the study area, in Santarem, Para State, an outbreak of Chagas disease has been notified and investigations suggest the con...
Article
Full-text available
Increasing human occupation of the Brazilian Amazon has led to the intensification of deforestation over the last 50 years. The present study is aimed at analysing the impacts of the first year of slash-and-burn cultivation on soil physicochemical properties. Sampling was done in 26 small-scale farms of the Tapajós River basin. In August 2004, soil...
Article
Full-text available
To evaluate watershed impacts of anthropogenic activities on terrestrial organic matter (TOM) and total mercury (THg) dynamics in large boreal lake ecosystems, we studied sediment cores retrieved in eight large lakes of Québec (Canada). Two lakes with pristine watersheds were considered as reference lakes and six lakes with watersheds affected by d...
Article
Full-text available
Les fertilisants, les pesticides et l’érosion des terres agricoles affectent les écosystèmes aquatiques. Depuis longtemps, le gouvernement du Québec recommande l’instauration et la végétalisation de bandes riveraines à titre de phytotechnologie assainissante. Sachant cela, leur faible adoption par les agriculteurs soulève un problème de politique p...
Article
Full-text available
Sediments from two recently (40 years) flooded lakes (Gabbro lake and Sandgirt lake) and an unflooded lake (Atikonak lake) were sampled to investigate the effects of reservoir impoundment on mercury (Hg) and terrigenous organic matter (TOM) loading in the Churchill Falls Hydroelectric complex in Labrador, Canada. Lignin biomar