Search results for "conservation."
showing 10 items of 1994 documents
Traits de réponse de la flore adventice à la mise en place du semis direct sous couvert
2013
Conservation Agriculture is designed to deliver more sustainable cropping systems by preserving agricultural soils with tillage abandonment. However, knowledge on the impacts of Conservation Agriculture adoption on weed infestation level and potential shifts in the composition of weed communities appears low and contradictory. We used a trait-based approach to investigate whether there are shifts in values of a set of traits within weed communities following the adoption of Direct Drilling with cover-crop (DD) which is one of the Conservation Agriculture practices. Weed surveys were conducted across a range of times since conversion to DD in 52 winter wheat fields located in north-eastern F…
Harnessing the biodiversity value of Central and Eastern European farmland
2015
A large proportion of European biodiversity today depends on habitat provided by low‐intensity farming practices, yet this resource is declining as European agriculture intensifies. Within the European Union, particularly the central and eastern new member states have retained relatively large areas of species‐rich farmland, but despite increased investment in nature conservation here in recent years, farmland biodiversity trends appear to be worsening. Although the high biodiversity value of Central and Eastern European farmland has long been reported, the amount of research in the international literature focused on farmland biodiversity in this region remains comparatively ti…
Diversity and complexity of microbial communities from a chlor-alkali tailings dump
2015
Abstract Revegetation of the tailings dumps produced by various industrial activities is necessary to prevent dust storms and erosion and represents a great challenge for ecological restoration. Little is known about the microbial colonisation and community structure of revegetated tailings following site exploitation. Here, we report the sequencing of 16S rRNA and internal transcribed spacer (ITS) fungal RNA gene amplicons from chlor-alkali residue and from an adjacent undisturbed soil to define the composition and assembly of the rhizosphere microbial communities. After quality filtering, a total of 72,373 and 89,929 bacterial sequences and 122,618 and 111,209 fungal sequences remained fo…
Economies d'agglomération et configurations spatiales dans les espaces ruraux
1997
The question to be addressed here is that of the agglomeration/dispersion forces that are likely to account for the location of people and jobs in rural areas and the way they explain spatial patterns in rural areas depending on urban influence. Economic geography models may provide suitable tools with which to investigate the organization of rural areas. We first review these models, focusing on dispersion forces, which rest basically on land consumption and transport costs. We suggest then a set of hypotheses concerning the main forces at work in rural areas. Intensity of agglomeration economies is hypothesized to be related to the urban size, which in turn induces increasing land rents a…
Protection de la ressource en eau du bassin de l’Auxerrois et transformation des pratiques agricoles
2022
Avec des taux de nitrates dépassant les seuils définis par la Directive européenne « nitrates », puis la présence de résidus de pesticides utilisés par les activités agricoles du secteur, l’eau des bassins d’alimentation de captages de l’Auxerrois fait l’objet de préoccupations depuis une trentaine d’année. C’est ainsi qu’à la fin des années 1990, les représentants des pouvoirs publics ont choisi de mettre en place une démarche préventive passant par un travail de transformation des pratiques agricoles. Notre article analyse comment la prise en charge collective de cette situation participe à la configuration des relations entre représentants des pouvoirs publics, agriculteurs et défenseurs…
Close-Range Photogrammetric Tools for Epigraphic Surveys
2016
In this article, we present a method to carry out a computerized epigraphic survey of historic stones and their engraved epigraphy. In fact, the preservation of archaeological objects has always been an issue of concern for the research community. On the one hand, the fragility of the objects limits their study. On the other hand, such objects are housed in museums, libraries, and institutions worldwide, locations that significantly limit their accessibility. Different survey methods have been carried out in these attempts to overcome the aforementioned limitations. Among them, the MicMac open source software was used in this work to survey and process the dense correlation of the hieroglyp…
Traiter en conservation des fonds d’archives historiques : le cas des bâtiments de l’OTAN aux Archives nationales
2012
Le site des Archives nationales de Fontainebleau dispose de locaux de conservation d’archives construits entre 1978 et 2007 et s’est engage a extraire 15 km de fonds ranges dans les anciens bâtiments remis par l’OTAN au gouvernement francais en 1967. Ces bâtiments de remploi, desamiantes en 2008, contiennent des fonds en etat sanitaire mediocre. Certains sont empoussieres sans qu’aucune fibre d’amiante ait ete observee, d’autres sont pollues par des fibres d’amiante. Suite a la fermeture des locaux entre 2003 et 2005, une demarche a ete initiee en 2006, qui commence avec le desamiantage des archives revenues de Moscou. Elle s’est poursuivie par deux campagnes de mesures de taux d’empoussier…
La nuit étoilée : cœur ou marge du tourisme durable ? Mise en protection et valorisation touristique des réserves de ciel étoilé
2015
International audience
Multifunctional areas as a tool to enhance biodiversity and promote conservation in alfalfa fields.
2021
The present study analyses the effects of multifunctional areas (MA) for three years (2013–2015) on an intensive multi-crop farm in Portugal. The implementation of MA resulted in a wide range of enhancements in the insect community, such as significant effects as a reservoir, allowing an increase of 102.47% in the number of species and 97.64% of individuals. MA play an important role in conservation strategies and help increase the population of rare and threatened arthropod species.
Soil, pasture and animal products quality
2013
The management of pasture, through the use of appropriate stocking rates and grazing systems, influences the feeding behaviour of the animals. The impact of animal behaviour on vegetation can be of great importance for the sustainability of pastures and mantaining their biodiversity. Indeed, a different response in terms of quality of animal products is mediated by the ability of animals to concentrate or transform grass components, according to the characteristics of the soil. The herbage ingested by animals provides them with compounds with aromatic characteristics, such as terpenes, and with functional properties beneficial for human health, such as carotenoids, vitamins, polyphenols and…