B. Poulin

B. Poulin
Tour du Valat, Research Institute for the Conservation of Mediterranean Wetlands · Ecosystems

PhD

About

85
Publications
23,310
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3,957
Citations

Publications

Publications (85)
Article
Full-text available
Increase in pesticide use and landscape homogenization are two key drivers of the decline in farmland biodiversity. The effects of these two drivers are often complex, interactive and vary among taxonomic groups. Our study tested the hypothesis that pesticide use influences the effect of different components of landscape complexity on different tax...
Poster
Full-text available
Our study tested the hypothesis that pesticide use influences the effect of different components of landscape complexity on different taxonomic groups. We assessed the abundance and diversity of 7 taxa in 118 crop fields in 32 rice paddy landscapes of 1*1 km in the Camargue. For each landscape, we measured the length of different field margins, the...
Article
Full-text available
The Domaine de la Palissade is a 700-ha nature reserve located at the mouth of the Rhône river in southern France. Since 2006, the tidal wetlands have been sprayed with Bacillus thuringiensis israelensis (Bti) and water level fluctuations minimized to reduce mosquito nuisance. Aerial spraying of VectoBac® 12AS (32 ITU/ha) is carried out 10 to 23 ti...
Article
Wetlands have been declining worldwide, with an estimated 64–71% loss over the last century. Climate change is increasing pressure on wetlands, affecting their hydrology, and Mediterranean temporary ponds could be particularly vulnerable to these changes. We studied the expected changes in hydrology and plant community according to climatic change...
Article
Full-text available
Bacillus thuringiensis subsp. israelensis (Bti) has been used in mosquito control programs to reduce nuisance in Europe for decades and is generally considered an environmentally-safe, effective and target-specific biocide. However, the use of Bti is not uncontroversial. Target mosquitoes and affected midges represent an important food source for m...
Article
Full-text available
Increasing landscape heterogeneity by restoring semi-natural elements to reverse farmland biodiversity declines is not always economically feasible or acceptable to farmers due to competition for land. We hypothesized that increasing the heterogeneity of the crop mosaic itself, hereafter referred to as crop heterogeneity, can have beneficial effect...
Article
Full-text available
Abstract Background The bacterium Bacillus thuringiensis serovar israelensis (Bti) is used in many countries as a biological larvicide to control dipteran insects of the suborder Nematocera, especially mosquitoes and black flies. Bti is generally accepted to be target-specific and efficient, with low potential for development of resistance among th...
Article
Full-text available
Flooding periodicity is crucial for biomass production and ecosystem functions in wetland areas. Local monitoring networks may be enriched by spaceborne derived products with a temporal resolution of a few days. Unsupervised computer vision techniques are preferred, since human interference and the use of training data may be kept to a minimum. Rec...
Article
Full-text available
Many wetlands are characterized by a vegetation cover of variable height and density over time. Tracking spatio-temporal changes in inundation patterns of these wetlands remains a challenge for remote sensing. Water In Wetlands (WIW) was predicted using a dichotomous partitioning of reflectance values encoded based on ground-truth (n = 4038) and op...
Article
Agricultural landscape homogenization has detrimental effects on biodiversity and key ecosystem services. Increasing agricultural landscape heterogeneity by increasing seminatural cover can help to mitigate biodiversity loss. However, the amount of seminatural cover is generally low and difficult to increase in many intensively managed agricultural...
Article
Full-text available
Wetlands have been declining worldwide over the last century with climate change becoming an additional pressure, especially in regions already characterized by water deficit. This paper investigates how climate change will affect the values and functions of Mediterranean seasonally-flooded wetlands with emergent vegetation. We simulated the future...
Article
Information and numbers on the use and appreciation of nature are valuable information for protected area (PA) managers. A promising direction is the utilisation of social media, such as the photo-sharing website Flickr. Here we demonstrate a novel approach, borrowing techniques from machine learning (image analysis), natural language processing (L...
Article
Full-text available
After World War II, twenty-nine coastal Salinas (122 km 2), located in the vicinity of coastal lagoons and in deltas, were exploited along the Mediterranean coastlines in South France. Today, only five of these are still actively producing salt, currently representing 175 km 2. Concomitant with the abandonment of many of the smaller Salinas, the la...
Chapter
Wetlands are a key habitat within the Mediterranean biodiversity hotspot and provide important ecosystem services for human well-being. Remote sensing (RS) has significantly boosted our ability to monitor changes in Mediterranean wetlands, especially in areas where little information is being collected. However, its application to wetlands has some...
Article
Full-text available
Protected Areas are a key component of nature conservation. They can play an important role in counterbalancing the impacts of ecosystem degradation. For an optimal protection of a Protected Area it is essential to account for the variables underlying the major Ecosystem Services an area delivers, and the threats upon them. Here we show that the pe...
Data
List of mistakes made in the surveys and the ways used to correct them. Categories are Ecosystem Services (ES), Threats (Thr), and Ecosystem Types (ETy). The variable which was originally indicated (“between quotation marks”) is followed by our Remark on it (unless it may have been renamed). For the Actions taken: Split means that the term is split...
Data
Harmonisation tables for all variables. (S2a) ecosystem services, (S2b) threats, and the classification of the variables into variables of biotic, abiotic or socio-economic (anthropogenic) nature, grey cells are variables indicated by PA managers. (PDF)
Data
Example of the survey sent to PA managers. (PDF)
Data
Example of the survey sent to, and answers from, the scientists working on protected areas. (PDF)
Data
List of ecosystem types. Indicated for the transitional waters (TW) and the mountainous (MO) protected areas. (PDF)
Article
Full-text available
We tested the use of mosquito traps as an alternative to spraying insecticide in Camargue (France) following the significant impacts observed on the non-target fauna through Bti persistence and trophic perturbations. In a village of 600 inhabitants, 16 Techno Bam traps emitting CO2 and using octenol lures were set from April to November 2016. Trap...
Preprint
Full-text available
We tested the use of mosquito traps as an alternative to insecticide spraying in Camargue (France) following the significant impacts observed on the non-target fauna through Bti persistence and trophic perturbations. In a village of 600 inhabitants, 16 Techno-Bam traps emitting CO2 and using octenol lures were set from April to November 2016. Trap...
Book
Full-text available
The European Red List of Habitats provides an overview of the risk of collapse (degree of endangerment) of marine, terrestrial and freshwater habitats in the European Union (EU28) and adjacent regions (EU28+), based on a consistent set of criteria and categories and detailed data and expertise from involved countries (http://ec.europa.eu/environmen...
Article
Bacillus thuringiensis var. israelensis (Bti) is the most commonly used larvicide to control mosquitoes worldwide. Considered as non-toxic to most organisms, Bti can nevertheless cause trophic perturbations to natural communities by reducing the abundance of Chironomidae, which are a key element of wetland food webs. Since August 2006, up to 8400 o...
Article
Bacillus thuringiensis var. israelensis (Bti) has become the most commonly used larvicide to control mosquitoes worldwide. Bti is considered non-toxic to most organisms, except some Diptera such as chironomids, which are a major prey in wetland food webs. Although Odonata are important predators of mosquitoes and chironomids at the larval and adult...
Article
Mediterranean wetlands are increasingly managed to maintain their functions and services following modification in water allocation, embankment and climate change, calling for proactive and adaptive water management. In a first step, we used long-term monitoring of water levels in 37 adjacent embanked marshes in the Camargue as a repeated non-contr...
Article
Full-text available
This study analysed 14 management plans and guidelines from a 25-year period to understand trends in conservation planning. A Rosetta Stone Analysis was used for the systematic comparison of plans and guidelines. Management plans incorporated management philosophies, management scenarios, opportunities for infrastructure, and plans for data collect...
Article
Reflectance data from multiseasonal SPOT-5 imagery was combined with monthly measures of water levels collected in the Rhône river delta (Camargue) in 2005 and 2006. Classification tree and regression models using monthly values of 17 multispectral indices and 4 bands, as well as their seasonal variations, were used for predicting the presence and...
Article
Full-text available
An understanding of risks to biodiversity is needed for planning action to slow current rates of decline and secure ecosystem services for future human use. Although the IUCN Red List criteria provide an effective assessment protocol for species, a standard global assessment of risks to higher levels of biodiversity is currently limited. In 2008, I...
Data
Full-text available
Definitions of terms. (PDF)
Article
Following its high selectivity and low toxicity to nontarget organisms, Bacillus thuringiensis var. israelensis (Bti) has become the most commonly used microbial agent to control mosquitoes worldwide. Considered non-toxic to mammals, birds, fish, plants and most aquatic organisms, Bti direct effects on the nontarget fauna are largely limited to non...
Article
Data collected in a 40-ha reedbed of southern France were used to compare the efficiency and limitation of mist-net and point-count techniques in estimating the composition and structure of a bird assemblage dominated by the Bearded Tit (Panurus biarmicus), the Moustached Warbler (Acrocephalus melanopogon), and the Reed Warbler (Acrocephalus scirpa...
Article
The Vallée des Baux in the western part of Provence hosts during each postnuptial migration one of the largest known nightroosts of Barn Swallows in France. This study aims at studying the foraging behaviour of individuals using this nightroost. A total of 96 sites located at a distance of less than 30km from the nightroost have been investigated a...
Article
Full-text available
The winter ecology of the Northern Waterthrush (Seiurus noveboracensis), the Prothonotary Warbler (Protonotaria citrea), and the American Redstart (Setophaga ruticilla) was studied in tropical mangroves of northeastern Venezuela. The birds' spatial and social behaviours were assessed through intensive mist-netting and observation sessions over two...
Article
1. The expanding use of selective pest-control agents provides a unique opportunity to study food web interactions in the field while addressing major environmental issues. Bacillus thuringiensis israelensis (Bti) is the most commonly used microbial agent to control mosquitoes worldwide. 2. Using breeding house martins Delichon urbicum as a model s...
Article
Ecologists and conservationists need accurate and replicable tools for monitoring wetland conditions in order to develop and implement adaptive management strategies efficiently. The Rhone Delta (Camargue) in southern France encloses 9200 ha of fragmented reed marshes actively managed for reed harvesting, waterfowl hunting or cattle grazing, and ho...
Article
Full-text available
Se realizaron capturas con grabaciones de cantos en cinco localidades de La Camarga (Francia) en abril y mayo de 2009 para documentar el uso de una ruta mediterránea por el carricerín cejudo durante la migración prenupcial. Seis individuos fueron capturados u observados en tres localidades correspondientes a dos tipos de hábitat: carrizales pastore...
Article
Multiseason reflectance data from radiometrically and geometrically corrected multispectral SPOT-5 images of 10-m resolution were combined with thorough field campaigns and land cover digitizing using a binary classification tree algorithm to estimate the area of marshes covered with common reeds (Phragmites australis) and submerged macrophytes (Po...
Conference Paper
Les marais de Larache abritent une importante fraction de la population nicheuse de la foulque caronculé Fulica cristata au Maroc, espèce menacée inscrite sur la liste rouge de l’UICN. Une méthode de dénombrement, basée sur la phénologie journalière et saisonnière du chant, a été mise au point afin d’obtenir des indices d’abondance qui ont été par...
Article
Full-text available
We compared the efficiency and robustness of two radiomet-ric correction techniques applied to six SPOT-5 scenes used for assessing environmental changes of Camargue wetlands: the 6S atmospheric model and 86 pseudo-invariant features (PIFs) found in deep water, pine trees, roofs and sand. The few PIFs were selected subjectively following the low nu...
Article
The vulnerable Eurasian bittern Botaurus stellaris has recently benefited from conservation actions in several European countries. The Camargue in Mediterranean France holds 8000ha of reed marshes and 50% of the French bittern population estimated at 300–350 booming males. Although reed cutting in Europe is a current practice, we provide the first...
Article
Full-text available
The reedbeds are complex socio-ecological systems. In the context of their decline, a role-playing game called ButorStar was developed. This tool focuses on the social dialogue learning approach and the understanding of the socio-ecological processes. The structure of the role-playing game and the multi-agent model are presented. To test the intere...
Article
Temporal variation in bird abundance was studied during a complete annual cycle in a thorn scrub, a thorn woodland and a deciduous forest in northeastern Venezuela. Abundance of site-attached and transient birds from different feeding guilds was determined by mist-netting at 2-week intervals. Diets were investigated by regurgitated samples. The ove...
Article
Full-text available
The present ornithological report for the Camargue covers six years (2001-2006). This time-period has been marked by an accelerated global warming (the summer 2003 was particularly extreme). Owing to a constant high observation pressure, 18 new species have been recorded and many rare species have been resighted in that region (Camargue, Crau, Alpi...
Article
Full-text available
Les roselières constituent des systèmes écologiques et sociaux complexes. Dans le contexte de leur régression, un jeu de rôles assisté par ordinateur appelé ButorStar a été développé. Cet outil met l’accent sur l’ apprentissage du dialogue social et la compréhension des processus socio-écologiques. La structure du jeu de rôles et le modèle multi-ag...
Article
Few data exist on the relationships between food levels and breeding density of the Eurasian bittern Botaurus stellaris, a vulnerable species of high-priority concern in Europe. Concurrent data were obtained on male bittern density and relative food abundance over a 3-year period in two wetlands totalling 2500 ha of Mediterranean reed marsh enclosi...
Article
Full-text available
A role-playing game (RPG) supported by computer simulations, called BUTORSTAR, has been developed in the context of a LIFE-Nature European Programme (2001-2005) aiming to improve reedbed management for the conservation of a vulnerable heron, the Eurasian Bittern. The agent-based model simulates the impacts of reedbed management resulting from decis...
Article
Full-text available
Mediterranean reedbeds are subject to different human uses, each associated with a particular water and reed management that affects the functioning of the ecosystem and the conservation of endangered species. We present here the general structure of ReedSim, a multiagent model that integrates the horizontal (spatial configurations) and vertical (s...
Technical Report
Full-text available
Les habitats naturels et/ou les espèces d’intérêt communautaire sont en règle générale représentés dans plusieurs sites Natura 2000. On peut considérer que les mesures de gestion permettant de maintenir ou de restaurer ces habitats naturels et/ou les habitats de ces espèces dans un bon état de conservation reposent à l’échelle régionale sur un tron...
Article
During the 1990s, the biodiversity became a major issue at the global scale. The Conservation Biology aims to understand the root-causes of the biodiversity loss, to stop it and to promote the wise use of natural resources. However, the multi-field approach recommended by its founders often contrast with a lack of integration of social and economic...
Article
During the 1990s, the biodiversity became a major issue at the global scale. The Conservation Biology aims to understand the root-causes of the biodiversity loss, to stop it and to promote the wise use of natural resources. However, the multi-field approach recommended by its founders often contrast with a lack of integration of social and economic...
Article
Full-text available
Data on habitat requirements of the threatened Eurasian bittern Botaurusstellaris are largely qualitative and limited to countries holding small populations. We assessed the habitat spectrum exploited by male bitterns during the breeding season, based on the analysis of 40 booming sites and 33 non-booming sites in 2,500 ha of heterogeneous reed-bed...
Article
Winter cutting of Common Reed Phragmites australis (Poaceae) is increasing in Camargue, southern France, potentially affecting wetlands of high conservation value. We studied its impact on arthropods by comparing four cut and uncut sites with special respect to avian prey availability in the breeding season. The two most important prey groups for b...
Article
Full-text available
Capsule Mites sometimes induced voluminous subcutaneous cysts in featherless parts. Aims To describe the first reported infestation by the skin-dweller mite Harpirhynchus nidulans in Bearded Tits Panurus biarmicus and for the Timaliidae family, to detect possible fitness costs for the host and to determine the distribution of the parasite within th...
Article
Diet of the Reed Warbler (Acrocephalus scirpaceus) was estimated by means of forced regurgitations of captured individuals during autumn migration at Kerbacha and Sidi Bou Ghaba, two wetland sites located respectively on the Mediterranean and Atlantic coasts in Morocco. Overall, 88 emetic samples were collected and 17 prey taxa were identified from...
Article
Mediterranean reedbeds are subject to different human uses, each associated with a particular water and reed management that affects the functioning of the ecosystem and the conservation of endangered species. We present here the general structure of ReedSim, a multiagent model that integrates the horizontal (spatial configurations) and vertical (s...
Article
Full-text available
We address the potential of booming in Great Bitterns as an indicator of male condition through a seasonal analysis of 5299 boom trains recorded from early Mar through mid Jul 2000 in ten reedbed sites in the Camargue, France. Boom train length peaked in May, averaging 3.6 and 4.7 booms at sites with single and multiple Great Bitterns, respectively...
Article
Full-text available
This paper addresses the sustainable management and conservation policies of large Mediterranean reedbeds. These habitats are subject to different human uses (reed harvesting, grazing, hunting, fishing and recreational activities), each associated with a particular water and reed management. Seasonal variations in water levels affect the functionin...
Article
Ecological studies and population surveys sometimes require information on the position of individuals. Because many birds are more audible than visible, we tested the potential of acoustic triangulation for locating Great Bitterns (Botaurus stellaris) within extensive reed marshes in the Camargue, France. During the breeding season, and predominan...
Article
The Great Bittern Botaurus stellaris is a secretive bird that lives in dense reed marshes. Population surveys of this vulnerable species are based on the characteristic vocalization (booms) of males during the breeding season. Probability of detecting a male is highly dependent upon the occurrence of booms, which is assumed to be density-dependent...
Article
Les roselières méditerranéennes sont l'objet de multiples usages, chacun étant associé à une gestion de l'eau et du roseau qui affecte le fonctionnement de l'écosystème et la conservation des espèces associées. Les auteurs présentent la structure générale de ReedSim, un modèle multi-agents qui intègre les relations horizontales (configurations spat...
Article
Reedbeds have high conservation value in Europe. In southern France, they are the major breeding habitat of five passerine species. Yet, habitat management is done primarily by water control to serve socio-economic rather than conservation interests, because we lack information on the species' ecological requirements. Determinants of passerine abun...
Article
Full-text available
Common reed is increasingly harvested from the Mediterranean region toprovide thatching material to north European countries. The impact of thesemanagement practices on the fauna is poorly known. The aim of this study was toquantify the effect of reed cutting in the Mediterranean region through acomparative analysis of water regime, vegetation stru...
Article
Full-text available
Although tropical forest birds are known to prey upon small lizards and frogs, no study has documented the attributes of vertebrate-eating birds or whether birds prey opportunistically on the different elements of the herpetofauna within tropical communities. This study is based on a 14-mo investigation on avian diet, supplemented with a 3-y census...
Article
Many reedbed passerines forage outside their nesting territory. This peculiar behaviour could allow reproductive individuals to feed in areas where resources are plentiful and/or to nest in areas where predation risks are low. These hypotheses were investigated for the Moustached Warbler Acrocephalus melanopogon and the Reed W arbler A. scirpaceus...
Article
Full-text available
Plants potentially compete for seed dispersal. Selection may favour temporally segregated fruiting phenologies to minimize this competition and also to maintain resident populations of dispersal agents. Alternatively, selection may favour temporally aggregated fruiting phenologies when the effectiveness of seed dispersal agents varies seasonally or...