Sophie Gachet

Aix-Marseille University | AMU · Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale (UMR 7263 IMBE)

A targeted dung-beetle (Scarabaeoidea: Aphodiidae, Scarabaeidae & Geotrupidae) survey in the "mas de Gonon" sector (Fos-sur-Mer, Bouches-du-Rhône) was conducted in 2019. The present study raised the previous known species richness of this area from 6 to 31 dung beetles. The results shows a remarkable richness and includes species that are localized...

Des recherches menées en 2018-2019 sur le site de la Feuillane à Fos-sur-Mer (Bouches-du-Rhône, France) ont permis de compléter des travaux entomologiques déjà menés sur ce site. Les insectes apparte-nant aux groupes suivants ont été systématiquement identifiés : coléop-tères ; lépidoptères rhopalocères et Zygaenidae ; diptères Conopidae, Hippobosc...

Nectar is a key resource for numerous insects. Despite its importance, nectar productivity has mainly been assessed using one sampling method, in which the volume of nectar produced by a flower is measured after 24 h of isolation from insects (‘measured 24 h volume’ hereafter). This method assumes that nectar removal by flower‐visiting insects does...

The importance of insects for global food crop production is starting to be well-known but the level of dependence on insects is less referenced, especially for some aromatic crops. Fennel (Foeniculum vulgare, Mill.) is an aromatic mass-flowering crop cultivated in the south of France for its essential oil that contains anethole. This compound is o...

Motivation Assessing biodiversity status and trends in plant communities is critical for understanding, quantifying and predicting the effects of global change on ecosystems. Vegetation plots record the occurrence or abundance of all plant species co‐occurring within delimited local areas. This allows species absences to be inferred, information se...

Agricultural landscapes are increasingly characterized by intensification and habitat losses. Landscape composition and configuration are known to mediate insect abundance and richness. In the context of global insect decline, and despite 75% of crops being dependent on insects, there is still a gap of knowledge about the link between pollinators a...

The SHARC Interest Group of the Research Data Alliance was established to improve research crediting and rewarding mechanisms for scientists who wish to organise their data (and material resources) for community sharing. This requires that data are findable and accessible on the Web, and comply with shared standards making them interoperable and re...

Bee hotels are increasingly set up by land managers in public parks to promote wild bee populations. However, we have very little evidence of the usefulness of bee hotels as tools to help the conservation of wild bees within cities. In this study, we installed 96 bee hotels in public parks of Marseille (France) for a year and followed their use as...

Questions Land use legacies in current forest understorey vegetation, thoroughly studied in temperate regions, were investigated in a Mediterranean context. We tested the effect of three historical variables on current forest plant communities and traits: forest temporal continuity (ancient: forested before 1860, recent: reforested after 1860, and...

Plant traits—the morphological, anatomical, physiological, biochemical and phenological characteristics of plants—determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research sp...

The one thing in common “archaeological”, “biodiversity” or “social systems” studies share is that data production is both expensive and few automated. Long time series and / or large spatial surveys are difficult to conduct, since it is necessary to use several observers. The robustness and reproducibility of the observation are also harder to get...

The one thing in common “archaeological”, “biodiversity” or “social systems” studies share is that data production is both expensive and few automated. Long time series and / or large spatial surveys are difficult to conduct, since it is necessary to use several observers. The robustness and reproducibility of the observation are also harder to get...

Aim Leaf traits strongly impact biogeochemical cycles in terrestrial ecosystems. Understanding leaf trait variation along environmental gradients is thus essential to improve the representation of vegetation in Earth system models. Our aims were to quantify relationships between leaf traits and climate in permanent grasslands at a biogeographical s...

Data produced within marine and terrestrial biodiversity research projects that evaluate and monitor Good Environmental Status, have a high potential for use by stakeholders involved in environmental management. However, environmental data, especially in ecology, are not readily accessible to various users. The specific scientific goals and the log...

Aim The characterization of trait–environment relationships over broad‐scale gradients is a critical goal for ecology and biogeography. This implies the merging of plot and trait databases to assess community‐level trait‐based statistics. Potential shortcomings and limitations of this approach are that: (i) species traits are not measured where the...

Plants reduce risk of extinction due to unpredictable rainfall by soil seed banks, dispersal or large seeds. However, seed size also increases independently in dry habitats, and since seed size is in a trade-off with seed number, size of seed banks is expected to increase in moister habitats. Therefore, we wanted to test if seed abundance in soil i...

Data produced by biodiversity research projects that evaluate and monitor Good Environmental Status have a high potential for use by stakeholders involved in [marine] environmental management. The lack of specific scientific objectives, poor organizational logic, and a characteristically disorganized collection of information leads to a decentraliz...

Ecological research produces a tremendous amount of data, but the diversity in scales and topics covered and the ways in which studies are carried out result in large numbers of small, idiosyncratic data sets using heterogeneous terminologies. Such heterogeneity can be attributed, in part, to a lack of standards for acquiring, organizing and descri...

Data produced by biodiversity research projects that evaluate and monitor Good Environmental Status have a high potential for use by stakeholders involved in [marine] environmental management. The lack of specific scientific objectives, poor organizational logic, and a characteristically disorganized collection of information leads to a decentraliz...

For the Mediterranean plant diversity hotspot, temporary pools combine a highly variable, rainfall-dependent habitat with high and endangered plant diversity within small surfaces. They show alternating phases of drought and flooding, corresponding to the characteristic summer drought and winter rain of Mediterranean climate. This alternation is co...

In a production framework of multi-source data in ecology, the equivalence of observation systems and inter-calibration become crucial. Increasingly, integrative trans-disciplinary approaches become necessary in the study of systems where measurement in each discipline is patchy, imprecise and badly distributed. Yet all the variables (biotic, abiot...

Data produced by the SeasEra CIGESMED project (Coralligenous based Indicators to evaluate and monitor the "Good Environmental Status" of the MEDiterranean coastal waters) have a high potential to be used by several stakeholders involved in environmental management. A new consortium called IndexMed whose task is to index Mediterranean biodiversity d...

Dans le cadre des études sur la biodiversité et les systèmes socio-écologiques (SSE), la production de données dans le domaine littoral et marin est à la fois coûteuse et peu automatisée. Les suivis de longues séries temporelles et/ou à larges emprises spatiales sont difficiles à mener, dès lors qu’il faut recourir à plusieurs observateurs, et la r...

Although biodiversity has been extensively studied over the last centuries, recent evidences suggest that links between collected data are still be missing. In order to fill this knowledge gap and at the initiative of the CNRS Institute of Ecology and Environment (INEE), IndexMed , a unique and multidisciplinary consortium consisting of ecologists,...

Que ce soit pour les études sur la biodiversité ou pour la connaissance des systèmes socio-écologiques, la production de donnée s’intensifie et se diversifie. Les longues séries temporelles et/ou les études à large emprise spatiale sont difficiles à analyser. Dès-lors qu’il faut recourir à plusieurs observateurs la robustesse de l’observation est p...

In a production framework of multi-source data in ecology, the equivalence of observation systems problematics and inter-calibration of observers become crucial. Increasingly, the need for integrative multi- or trans-disciplinary approaches becomes necessary, in the study of systems where data output in each discipline is discontinuous, somewhat im...

Functional and taxonomic typology of pine communities in Algiers and Oran areas (Algeria). Standard measurements of biodiversity, such as those based on species diversity and abundance, do not take into account the ecological and evolutionary characteristics of species per se, and provide us with an incomplete understanding of the causes and conseq...

The impact of climate change on forest ecosystems now encourages managers to implement adaption strategies in terms of species choice despite the uncertainty of future scenarios. To achieve this, a quantified characterization of species ecological requirements is necessary. The project Traitaut thus aimed at developing a new quantitative approach t...

Towards a decision support tool for the adaption of french forest to climate change The impact of climate change on forest ecosystems now encourages managers to implement adaption strategies in terms of species choice despite the uncertainty of future scenarios. To achieve this, a quantified characterization of species ecological requirements is ne...

Vegetation groups from life-history traits for the management of a savannah–forest mosaic. This study defined ecological groups of tree species based on species life-history traits within the savannah–forest mosaic of the Lopé National Park, Gabon in order to understand the connection between different types of forest within this study area. Three...

Electronic appendix to "Crop genetic diversity benefits farmland biodiversity in cultivated fields": https://www.researchgate.net/publication/242020453_Crop_genetic_diversity_benefits_farmland_biodiversity_in_cultivated_fields

Electronic appendix to "Crop genetic diversity benefits farmland biodiversity in cultivated fields": https://www.researchgate.net/publication/242020453_Crop_genetic_diversity_benefits_farmland_biodiversity_in_cultivated_fields

Electronic appendix to "Crop genetic diversity benefits farmland biodiversity in cultivated fields": https://www.researchgate.net/publication/242020453_Crop_genetic_diversity_benefits_farmland_biodiversity_in_cultivated_fields

Electronic appendix to "Crop genetic diversity benefits farmland biodiversity in cultivated fields": https://www.researchgate.net/publication/242020453_Crop_genetic_diversity_benefits_farmland_biodiversity_in_cultivated_fields

Background and Aims Seeds buried in the soil detect burial depth through light and diurnally fluctuating temperatures (DFT) and in this way limit losses due to germination too deep in the soil. DFTs and germination also increase in vegetation gaps. However, dry open environments with high DFTs can also increase seedling mortality, creating conflict...

Gouraya National Park covers a calcaro-dolomitic littoral solid mass and its silicicolous prolongation towards the west. It belongs to the regional hotspot of "Kabylies-Numidia-Kroumiria" but its vegetation was just partially explored. We try here a first synthesis under the phytosociological point of view. On the basis of 144 species and 56 floris...

Résumé : Dans les communautés naturelles les modalités des traits des individus dessinent des patterns, qui peuvent être en partie le fruit de processus aléatoires mais aussi et probablement majoritairement construits suite à une sélection du milieu, selon la théorie des règles d'assemblage. Existe-il, chez les collemboles, des liens entre les cara...

Phytosociological characterization of the vegetation of Gouraya National Park (Béjaïa, Algeria). Gouraya National Park covers a calcaro-dolomitic littoral solid mass and its silicicolous prolongation towards the west. It belongs to the regional hotspot of “Kabylies-Numidia-Kroumiria” but its vegetation was just partially explored. We try here a fi...

1. We introduce a novel method that analyses environmental filtering of plant species in a geographic and phylogenetic context. By connecting species traits with phylogeny, traits with environment, and environment with geography, this comprehensive approach partitions the ecological and evolutionary processes that influence community assembly. 2. O...

Functional diversity is at the heart of current research in the field of conservation biology. Most of the indices that measure diversity depend on variables that have various statistical types (e.g. circular, fuzzy, ordinal) and that go through a matrix of distances among species. We show how to compute such distances from a generalization of Gowe...

Our aim was to ascertain whether changes in plant species richness and other vegetation features occur in heathland dominated by Erica scoparia L. (besom heath) through the impact of cattle grazing and oak colonization. Our study took place in the Brenne Regional Natural Park (center of France) where this cricaceous species, locally called 'brande'...

Plant functional traits are powerful tools to identify generic responses of biodiversity and ecosystem function to environmental change and to understand their underlying mechanisms. A collaborative initiative was launched to collect under a single data base information for vegetation composition, environmental variables, and plant traits of alpine...

Évaluer l'intégrité écologique des forêts représente un défi majeur pour les écologistes. Nous avons analysé la végétation de sous-bois à l'aide d'une approche qui combinait les types fonctionnels et la stratification verticale afin d'évaluer les effets des perturbations anthropiques sur l'intégrité écologique d'érablières à sucre dans le sud du Qu...

The aim of this study was to evaluate if and how the previous land use (here: agriculture versus forest) has influenced the floristic composition now observed in the understory of jack pine plantations of Abitibi-Temiscamingue (North-Eastern Canada). Floristic inventories were conducted in jack pine plantations which had been established on forest...

Cited By (since 1996): 1, Export Date: 12 April 2011, Source: Scopus

The French Mediterranean zone is one of the richest of the country, with 3200 species and many endemics. Because of its interest as a synthetic tool to store and manage data, an ecological Mediterranean flora database was created. Built around five tables, BASECO allows several queries about the botanical and ecological characteristics of about 180...

Aim This paper presents a probabilistic method of pollen spectra analysis. The method relies on a pollen taxon characterization using biotic and abiotic plant attribute modes, and their occurrence in a given pollen spectrum at a specific site. This type of analysis can provide an interpretation, which can lead to the reconstruction of the biome and...

Nine leaf traits (area, fresh weight, dry weight, volume, density, thickness, specific leaf area (SLA), dry matter content (LDMC), leaf nitrogen content (LNC)) from ten plant species at eight sites in southern mediterranean France were investigated in order to assess their variability along a climatic gradient and their ranking congruency power. Af...

Aim This paper presents a probabilistic method for the characterization of pollen taxa using attributes, and for the reconstitution of past biomes. The probabilities are calculated on the basis of European floristic and pollen databases sufficiently large and exhaustive to provide robust estimates. Location The analysis is based on data from approx...

Aim: This paper presents a probabilistic method for the characterization of pollen taxa using attributes, and for the reconstitution of past biomes. The probabilities are calculated on the basis of European floristic and pollen databases sufficiently large and exhaustive to provide robust estimates. Location: The analysis is based on data from appr...

La région méditerranéenne française, particulièrement concernée par une importante déprise agricole depuis le début du XXe siècle, constitue aujourd'hui une zone d'étude privilégiée pour établir une synthèse sur la dynamique post-culturale des boisements naturels. Les modèles spatiaux, regroupant les différentes formations préforestières et foresti...

By sampling plant species in a Mediterranean grassland, the authors examine the influence of the study scale on: (i) the detection of ecological gradients by the correspondence analysis, and (ii) the validation of one of the two models: core-satellite hypothesis or Kolasa's model. These models concern the frequency distribution of species. The size...

Ce travail repose sur les charbons de bois enfouis dans les sols et les autres macrorestes ont été datés par 14C et identifiés botaniquement, et pour un site particulier (lac Cristol), sur les analyses de pollens, d'insectes, de macro-restes végétaux, charbons de bois et tronc d'arbres ont été combinés en une « approche multi-proxy » afin de mieux...