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Jean-François Debras
Institut national de la recherche agronomique
19Publications
5H-index
181Citations
Publications 19
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#1Jean-François Alignan (INRA: Institut national de la recherche agronomique)H-Index: 1
#2Jean-François Debras (INRA: Institut national de la recherche agronomique)H-Index: 5
Last.Thierry DutoitH-Index: 25
view all 4 authors...
Given that biological conservation cannot prevent the full range of negative impacts on biodiversity, ecological restoration is nowadays commonly acknowledged as a necessary tool for conservation purposes. Here, we report on an ecological rehabilitation project in the La Crau area (south-eastern France), beginning in 2009 when a former industrial orchard (357 ha) was rehabilitated into a Mediterranean rangeland. We assessed the effect of ecological rehabilitation and different additional restora...
#1Jean-François Alignan (AMU: Aix-Marseille University)H-Index: 1
#2Jean-François Debras (INRA: Institut national de la recherche agronomique)H-Index: 5
Last.Thierry Dutoit (AMU: Aix-Marseille University)H-Index: 8
view all 3 authors...
Abstract In the last few years, legislation in more and more countries has stipulated compensation for impacts on biodiversity. France was one of the first countries to include compensation in its national law on nature preservation (1976), but habitat banking was only recently introduced into the mitigation regulatory framework. It was applied for the first time in 2008, when the first French Natural Asset Reserve was created in the plain of La Crau (Southeastern France), the last semi-arid ste...
#1Jean François Alignan (INRA: Institut national de la recherche agronomique)H-Index: 3
#2Jean-François Debras (INRA: Institut national de la recherche agronomique)H-Index: 5
Last.Thierry DutoitH-Index: 25
view all 3 authors...
In the last century, human activities have contributed to the fragmentation and the loss of 80 % of the original surface of a Mediterranean steppe rangeland in south-eastern France. In a recent ecological restoration project, an intensively cultivated orchard of 357 ha planted in 1987 among the steppe vegetation was rehabilitated as a herbaceous habitat for steppe birds after its abandonment in 2006. In addition, three experimental restoration treatments (nurse species seeding, hay transfer; soi...
#1Sylvaine Simon (INRA: Institut national de la recherche agronomique)H-Index: 13
#2Jean-Charles Bouvier (INRA: Institut national de la recherche agronomique)H-Index: 18
Last.Benoît Sauphanor (INRA: Institut national de la recherche agronomique)H-Index: 29
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Conventional agriculture is based on a high level of chemical inputs such as pesticides and fertilisers, leading to serious environmental impacts, health risks and loss of biodiversity in agrosystems. The reduction of pesticide use is a priority for intensively sprayed agricultural systems such as orchards. The preservation and promotion of biodiversity within orchards and their boundaries is therefore an issue to explore. Indeed, orchard systems contain high plant diversity and perennial multi-...
#1Jean-François Debras (INRA: Institut national de la recherche agronomique)H-Index: 5
#2Rachid Senoussi (INRA: Institut national de la recherche agronomique)H-Index: 10
Last.Thierry Dutoit (CNRS: Centre national de la recherche scientifique)H-Index: 25
view all 5 authors...
Abstract This study analysed specific features of the spatial distribution of a global population of arthropods in an experimental orchard of pear trees, Pyrus communis (L.), in southern France. Insect fauna was sampled by regular beating of the 210 trees in the experimental orchard from spring to autumn in three consecutive years (2004–2006). This orchard, where no chemical treatments had been applied since 2000, is bordered to the north by a mixed hedge, to the south by a cypress hedge of Cupr...
#1Jean-François Debras (INRA: Institut national de la recherche agronomique)H-Index: 5
#2Audrey Dussaud (INRA: Institut national de la recherche agronomique)H-Index: 1
Last.Thierry Dutoit (University of Avignon)H-Index: 8
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Resume L'influence de l'occupation du sol, en bordure des parcelles cultivees, sur les peuplements en arthropodes et la regulation des effectifs de ravageurs fait des haies un objet d'etudes majeur. Existe-t-il des echanges de population entre haie et vergers qui font de la haie une source ou un puit d'especes vis-a-vis de la parcelle cultivee ? Dans le cadre de recherches de strategies innovantes dans la lutte contre les bioagresseurs en arboriculture, le role « source » des haies est etudie a ...
#2Audrey DussaudH-Index: 1
Last.Thierry DutoitH-Index: 8
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En verger de poirier les perce oreilles Forficula auricularia L. et Forficula pubescens Gene., (Dermaptera: Forficulidae) sont consideres comme d'actifs predateurs du psylle Caco-psytia pyri L. (Hemiptera: Psyllidae). On les trouve autant dans le verger que son environnement. Dans le travail presente ici, nous avons suivi leur deplacement entre une haie composite et un verger de poirier au printemps 2006. Nous avons utilise la methode de « capture, recapture » avec marquage traumatique dans le b...
#1Jean-François Debras (INRA: Institut national de la recherche agronomique)H-Index: 5
#2Franck Torre (CNRS: Centre national de la recherche scientifique)H-Index: 14
Last.Thierry Dutoit (INRA: Institut national de la recherche agronomique)H-Index: 25
view all 8 authors...
The arthropod populations in five pear orchards were sampled by beating branches twice a month during the year 2003 in the Provence region of south-eastern France. Multivariate analyses linking the matrix of species with a certain number of environmental variables (distance from the hedge, type of agricultural practices in the orchard, year effect, etc.) were performed to identify the most explanatory variables in terms of composition and structure (richness and equitability) of different arthro...
#2Marianne CousinH-Index: 10
Last.R. RieuxH-Index: 4
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La plantation de haies composites reservoirs d'auxiliaires en bordure des cultures est une pratique qui se developpe dans le cadre de la protection fruitiere integree. Un de ses principes fondateurs est que l'augmentait de la diversite vegetale a pour consequence directe l'augmentation de la diversite animale, l'objectif vise etant de rapprocher et d'augmenter les entomophages en bordure des cultures, Mais en fait le risque que l'augmentation du nombre d'essences vegetales se traduise par une au...
#1Jean-François Debras (INRA: Institut national de la recherche agronomique)H-Index: 5
#2Marianne Cousin (INRA: Institut national de la recherche agronomique)H-Index: 10
Last.R. Rieux (INRA: Institut national de la recherche agronomique)H-Index: 4
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Introduction. Pour la mise en place de mesures a promouvoir dans le cadre d'une protection integree, celles concernant un amenagement des abords des cultures deviennent un objectif principal. Cependant, jusqu'a present, cet amenagement s'est fait sans veritable critere. La presente etude montre comment il est possible de raisonner le choix des especes vegetales. Materiel et methodes. L'entomofaune de 44 especes ligneuses dont celle du poirier cultive a ete observee, pour chacune de ces especes, ...
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