Sylvie Ladet

Sylvie Ladet
L’Institut national de la recherche agronomique (Toulouse) · Dynamiques et écologie des paysages agriforestiers (DYNAFOR)

MS

About

72
Publications
21,490
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1,435
Citations
Citations since 2016
20 Research Items
810 Citations
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2016201720182019202020212022050100150
2016201720182019202020212022050100150
2016201720182019202020212022050100150

Publications

Publications (72)
Article
The evidence that most agricultural landscapes are failing to deliver on biodiversity conservation and ecosystem services provision suggests that future landscapes will need to be more explicitly designed. Although recent research has produced a number of ecological and social principles that should form the basis of agricultural landscape design p...
Article
Full-text available
Context Many forest ecosystems around the world are facing increasing drought-induced dieback, causing mortality patches across the landscape at multiple scales. This increases the supply of biological legacies and differentially affects forest insect communities. Objectives We analysed the relative effects of local- and landscape-level dieback on...
Article
Road construction is expanding worldwide, exacerbating both direct mortality by road-kills and habitat fragmentation , especially for mobile vertebrates such as bats. Understanding how road density affects bat communities in mosaic landscapes of various compositions and configurations is therefore critical. We acoustically sampled bat communities i...
Article
Full-text available
Farming intensity and landscape heterogeneity influence agrobiodiversity and associated ecological functions. The relative contributions of these agroecosystem components to agricultural production remain unclear because of inter-relations and weather-dependant variations. Using a structural equation modelling approach, we estimated direct and indi...
Preprint
Full-text available
Context: Forest ecosystems worldwide are facing increasing drought-induced dieback, causing mortality patches across the landscape at multiple scales. This increases the supply of biological legacies and differentially affects forest insect communities. Objectives: We analysed the relative effects of local- and landscape-level dieback on local sapr...
Article
The retention of trees bearing tree‐related microhabitats (TreMs) has become an important means of conserving biodiversity in production forests. However, we lack estimates of TreM formation rates and evidence on factors driving TreM formation. Based on the observation of 80,099 living trees from 19 species groups in Europe and Iran, we estimated t...
Article
Full-text available
A Tree-related Microhabitat (TreM) is a distinct, well-delineated morphological singularity occurring on living or standing dead trees, which constitutes a crucial substrate or life site for various species. TreMs are widely recognized as key features for biodiversity. Current TreM typology identifies 47 TreM types according to their morphology and...
Article
Full-text available
Farm forests and trees outside forests (i.e., ‘rural forests’) are key components for the sustainability of agricultural landscapes. Farmers are the main managers of rural forests and their practices vary according to a range of individual and collective factors. This diversity in management practices challenges the understanding of landscape patte...
Article
Full-text available
Context While the concept of ecosystem services (ES) is well established in the scientific and policy arenas, its operationalization faces many challenges. Indeed, ES supply, demand and flow are related to ecological and social processes at multiple space and time scales, leading to complex interactions in the provision of multiple ES. Objectives...
Article
Complex landscapes including semi-natural habitats are expected to favour natural enemies thereby enhancing natural pest biocontrol in crops. However, when considering a large number of situations, the response of natural biocontrol to landscape properties is globally inconsistent, a possible explanation being that local agricultural practices coun...
Article
To encourage forest managers to use biodiversity indicators in their work, providing environmental variables that depict species habitats, have well-calibrated and strong relationships with biodiversity and are easy to routinely record would be a step forward. The Index of Biodiversity Potential (IBP) is a rapid habitat assessment method widely use...
Article
Full-text available
Flightless saproxylic beetles were selected in order to study the impact of temporal and spatial discontinuity of forests. They were chosen because: (1) they are unable to fly, making them dispersal-limited species, (2) they have a saproxylic diet, which means they are closely linked to the forest, and (3), they have rarely been studied. Forest tem...
Chapter
This chapter illustrates the implementation of a conventional methodology in landscape ecology. The method is based on an existing landscape representation, i.e. a land cover description of the landscape which consists of the following steps: computation of a set of features and use of the features as explanatory variables in a descriptive model bu...
Book
This chapter illustrates the implementation of a conventional methodology in landscape ecology. The method is based on an existing landscape representation, i.e. a land cover description of the landscape which consists of the following steps: computation of a set of features and use of the features as explanatory variables in a descriptive model bu...
Poster
Full-text available
In French agricultural landscapes, rural forest (including small private woodlots, hedgerows, and isolated trees) is crucial for landscape functioning and related ecosystem services. Farmers own and manage rural forests according to their individual objectives and rationality, which is more complex than the sole economic profitability. Social netwo...
Article
Full-text available
Ancient forests are of considerable interest for strategies for biodiversity conservation. However, in European forest landscapes fragmented and harvested for a long time forest continuity might be no longer a key driver for flying organisms such as saproxylic beetles. In a study based on paired samples (n = 60 stands, p = 180 traps) of ancient and...
Article
Full-text available
Extensive livestock systems in mountainous regions have allowed the preservation of numerous ecosystem services that are crucial for sustainable development. In this study, we assessed multilevel relationships between farmland management practices and agricultural landscape composition and configuration. The goal was to determine the conditions und...
Article
The ecosystem services provided by agricultural landscapes depend on numerous ecological processes, as well as on the latter's multiscale interactions with farmland management practices. These processes and their interactions are very complex and, currently, we lack a well-supported methodology for examining their effects on landscape-level ecosyst...
Article
Full-text available
Agriculture in mountainous regions shapes the landscape. However, given agriculture's decline, can it still act to maintain open spaces and prevent the land from returning to its wild state? Landscape changes vary from region to region and are determined by the type and scale of changes in farming practices and production systems. In this study, we...
Article
Full-text available
Agriculture in mountainous regions shapes the landscape. However, given agriculture’s decline, can it still act to maintain open spaces and prevent the land from returning to its wild state? Landscape changes vary from region to region and are determined by the type and scale of changes in farming practices and production systems. In this study, we...
Article
Full-text available
The ecosystem services provided by agricultural landscapes depend on numerous ecological processes, as well as on the latter’s multiscale interactions with farmland management practices. These processes and their interactions are very complex and, currently, we lack a well-supported methodology for examining their effects on landscape-level ecosyst...
Poster
Full-text available
Atteindre l’objectif affiché de réduction du niveau d’usage de produits phytosanitaires tout en maintenant les niveaux de production des cultures implique la mise en place de stratégies de protection des cultures alternatives à la lutte chimique. L’adoption de pratiques plus favorables à la biodiversité dans les agroécosystèmes pourrait contribuer...
Conference Paper
Full-text available
Edges between forest and agricultural areas are very common in rural landscapes where temperate forests are fragmented. From an ecological point of view, edges are most often defined as the boundary between two distinct habitats. Therefore, they have common characteristics with habitats they separate. Conversely, they can be considered as special e...
Article
Les GNSS (global navigation satellite system) parmi lesquels le système américain GPS (global positioning system) ont tous pour principal objectif de donner la position et la vitesse d’un mobile à tout instant, en tout lieu et dans un référentiel global. Comme tout système basé sur des satellites, il est structuré en trois composantes qui seront dé...
Article
Dans le domaine de la géomatique on assiste actuellement à une véritable révolution au niveau de la production des données avec l’apparition de nombreuses « Big Data ». Cette révolution est directement liée aux évolutions matérielles et technologiques qui permettent d’embarquer un logiciel SIG (système d’information géographique) sur un smartphone...
Article
Full-text available
he management of small private forests in the Western World has been under threat owing to rural and agricultural transformations since the Second World War. The actions put in place to preserve those forests are hard to implement because the forests are managed essentially in an unofficial way that is not clearly understood. Through multidisciplin...
Article
Introduction As in many mountain areas in Europe, agro-pastoral landscapes in the valleys of the Pyrenees are subject to fast spontaneous reforestation [1,2]. The main driving forces and the consequences of these transformations have been widely studied during the last decades [3]. Encroachment is mainly related to the abandonment of farmland in co...
Book
This paper presents the first results of the MODE-RESPYR project that aims at assessing past and present land cover changes in the French Pyrenees at various spatial and temporal scales. A semi-automatic GEOBIA approach is proposed to produce land cover maps since the 1940s in three local study sites. The major change observed resulted in forest en...
Article
Full-text available
Understanding how patterns of habitat selection vary in relation to landscape structure is essential to predict ecological responses of species to global change and inform management. We investigated behavioural plasticity in habitat selection of roe deer (Capreolus capreolus) in relation to variable habitat availability across a heterogeneous agri...
Book
In this contribution, we evaluate the potential of hyperspectral imagery for identifying ash tree and other dominant species in encroached mountain grasslands. The method is based on a supervised approach using Support Vector Machines in which kernel parameters are fixed by kernel alignment. We present the application of the method and the first re...
Conference Paper
Full-text available
In this contribution, we evaluate the potential of hyperspectral imagery for identifying ash tree and other dominant species in encroached mountain grasslands. The method is based on a supervised approach using Support Vector Machines in which kernel parameters are fixed by kernel alignment. We present the application of the method and the first re...
Book
Research in the landscape ecology done by DYNAFOR research laboratory aims at understanding the relationships between the composition of the landscape, its evolution and biodiversity in agroecosystems. New issues related to the protection of crops or the conservation of biodiversity have highlighted importance of the semi-natural small elements (he...
Article
Full-text available
Natural reforestation of European mountain landscapes raises major environmental and societal issues. With local stakeholders in the Pyrenees National Park area (France), we studied agricultural landscape colonisation by ash (Fraxinus excelsior) to enlighten its impacts on biodiversity and other landscape functions of importance for the valley soci...
Article
Full-text available
In order to understand the capacity of habitats to conserve species, many authors have searched for a species–area relationship (SAR) to evaluate the effect of patch size on species richness in habitat fragments. However, a range of different processes may underlie or obscure this relationship. For woody plant species in forest fragments, as for ot...
Article
Les lisières forestières sont des composantes clés des paysages ruraux car elles influencent des processus écologiques à l’interface entre les milieux. Les lisières varient selon leur physionomie, leur orientation, leur histoire et leur topographie, mais peu de méthodes sont disponibles pour identifier ces différents types de lisières et pour les c...
Article
Full-text available
Cet article décrit la chaîne de traitement informatique de données diverses acquises sur le terrain dans un espace géographique délimité au cours du temps et qui comprend la structuration de type relationnelle (SGBD) et spatialisée (SIG), le stockage (serveur et sauvegarde) et la valorisation (métadonnées et éventuellement diffusion vers l’extérieu...
Article
Full-text available
While small, fragmented wooded elements do not represent a large surface area in agricultural landscape, their role in the sustainability of ecological processes is recognized widely. Unfortunately, landscape ecology studies suffer from the lack of methods for automatic detection of these elements. We propose a hybrid approach using both aerial pho...
Article
Le Bas-Comminges, petite région du Sud de la Gascogne (Haute-Garonne) est l’objet, depuis de nombreuses années, de toutes les attentions du laboratoire Dynafor (Dynamiques forestières dans l’espace rural) et a d’ailleurs été labellisé site de recherche international à long terme. Si son approche est centrée sur l’écologie du paysage, Dynafor se met...
Article
The landscape of a “House society” (“société à maison”) in Bas-Comminges as seen from cadastral and photographic archives: when ethnology and geomatics meet. The use of tools such as Geographic Information Systems (GIS) enables a new formalisation to be given to data obtained by sifting through archives, especially cadastral archives. The aim of th...
Book
Agriculture is nowadays expected to adopt “multifunctional” land use practice as a contribution to sustainable development of rural areas. We started a participatory research study in the Coteaux de Gascogne (France) to prospect local paths for agricultural systems contribution to landuse sustainability. The area considered is a study-site of the L...
Conference Paper
Full-text available
Facing up the stakes concerning the durability of the European agricultural systems, researchers try to model social, economical and ecological determinants of rural landscapes. Those models, like multi-agent system, require the understanding of complex decision and interaction processes. In Western Europe, the legislative pressures (CAP) but also...
Chapter
Full-text available
The future of the agriculture in mountain areas constitutes an important stake for sustainable development in relation to landscape functions and their role in local economies. This future depends highly on its ability to develop innovative and multifunctional agricultural systems and to preserve its attractiveness for future generations. Encroachm...
Article
Full-text available
Landscape encroachment and reforestation in mountain areas further to land abandonment and land-use extensification raises topical issues for sustainable development. An acknowledged challenge for the future of local agriculture is to contribute to the maintenance of a variety of landscape functions. In Pyrenean landscapes colonised by ash tree, la...
Article
Full-text available
Reconstruction of felling history is useful to better understand how past human activity impacts current biodiversity. Characterization and mapping of the history of silvicultural management in private small-sized woodlands is difficult due to the lack of reliable data. The article describes the main steps of a method that uses regressive and then...
Book
The future of the agriculture in mountain areas constitutes an important stake for sustainable development in relation to landscape functions and their role in local economies. This future depends highly on its ability to develop innovative and multifunctional agricultural systems and to preserve its attractiveness for future generations. Encroachm...
Article
Full-text available
Interdisciplinary research frameworks can be useful in providing answers to the environmental challenges facing rural environments, but concrete implementation of them remains empirical and requires better control. We present our practical experience of an interdisciplinary research project dealing with non-industrial private forestry in rural land...
Article
Full-text available
The small scale forest holdings are very common in Europe, but their management is not well known. The classical principes of forest management and of silviculture being rarely applied, their management is often seen as purely opportunistic, and even chaotic. To overcome this first sight, a detailed analysis of management practices in six private w...
Book
Past change in agricultural systems over the past mid-century brought out important change in agricultural land use in Mediterranean mountain areas. Agricultural abandonment resulted into landscape encroachment and reforestation processes of negative impact on natural resources and landscapes. Sustainable development of livestock husbandry in this...
Article
Full-text available
Research studies aimed at integrating socio-economic and geo-bio-physical factors are increasingly being used in order to improve our understanding of the causes and effects of land-use change and to support sustainable landscape development. In line with such approaches, the study reported in this paper addresses land-use change and its drivers in...