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Articles by Benoît Geslin
Synthesised database of wild bee and hoverfly records in Europe - Scientific Data
Abstract Wild bees (Hymenoptera: Anthophila) and hoverflies (Diptera: Syrphidae), the two major groups of insect pollinators, are undergoing alarming declines worldwide, including Europe. The lack of accessible and verified spatial and temporal occurrence records currently challenges efforts to understand and mitigate this decline.
Short-term responses of ground-dwelling arthropod communities to habitat loss and fragmentation in experimental mesoscale landscapes - Scientific Reports
Abstract Habitat loss and fragmentation are main drivers of biodiversity decline. However, disentangling their respective effects remains tricky and contrasting results have emerged in previous studies leading to a call for finely designed landscape-scale experiments that compare different levels of habitat fragmentation at fixed habitat loss, and that for different levels of habitat loss.
BeeFunc, a comprehensive trait database for French bees - Scientific Data
Abstract Given pollinator’s reported decline, it is of utmost importance to better understand the vulnerability of wild bees to human pressures. One way to achieve this goal is to explore how their traits are associated with exposure to anthropogenic perturbations. To date, there is no database synthesizing traits of bees at the species level in France, limiting the functional interpretation of inventories.
Tailoring interaction network types to answer different ecological questions - Nature Reviews Biodiversity
Abstract Ecological interaction networks are an important tool for describing species interactions, but many network approaches are available, each with their strengths and weaknesses. In this Perspective, we describe how interaction networks can be differentiated in two main ways: by the extent of node aggregation (how species are lumped into groups) and by the type of information contained in links (potential versus realized interactions).
Microbiota and pathogens in an invasive bee: Megachile sculpturalis from native and invaded regions
Gut microbiota community of M. sculpturalis in Japan One bacterial (Rosenbergiella) and five fungal ASVs (Saccharomycetales incertae sedis [two ASVs], Moniliella, and Metschnikowia [two ASVs]) were identified as core gut microbes in Japanese M. sculpturalis samples (Figure 3). Moniliella and Kosakonia ASVs were more abundant in Japanese M. sculpturalis than in those of New York, while Moniliella and both Metschnikowia ASVs were more abundant in Japanese M.
Evidence for multiple introductions of an invasive wild bee species currently under rapid range expansion in Europe
Abstract Background Invasive species are increasingly driving biodiversity decline, and knowledge of colonization dynamics, including both drivers and dispersal modes, are important to prevent future invasions. The bee species Megachile sculpturalis (Hymenoptera: Megachilidae), native to East-Asia, was first recognized in Southeast-France in 2008, and has since spread throughout much of Europe. The spread is very fast, and colonization may result from multiple fronts.
Climate change: bees are disorientated by flowers’ changing scents
Coffee, apples, honey – were it not for the precious work of pollinators, countless things that we eat and drink would not exist, totalling more than 30% of global food production. Most pollinators are insects, particularly from the bee family (close to a thousand species in France alone), along with butterflies and diptera, such as syrphids.
Changement climatique : les abeilles déboussolées par la nouvelle odeur des fleurs
Café, pommes, miel… on ne compte pas les produits de notre alimentation qui n’existent que grâce au concours précieux des pollinisateurs. Et pour cause, ils contribuent à plus de 30 % de la production agricole. La plupart sont des insectes, tout particulièrement de la famille des abeilles (près de 1 000 espèces différentes rien qu’en France), des papillons, ou encore des diptères comme les syrphes.
Elvire, 10 ans : " Est-ce que c’est vrai que sans les abeilles, on peut pas vivre ? "
Bonjour Elvire et merci pour ta question. Je vais te rassurer tout de suite car ce n’est pas tout à fait vrai. Ce qui est vrai, c’est que les abeilles sont comme beaucoup d’autres insectes des « pollinisateurs ». Les pollinisateurs visitent les fleurs une par une pour se nourrir. En visitant les fleurs, ils transportent du pollen : ce sont les petits grains qui permettent aux plantes de se reproduire.
Abeilles en danger : n’oublions pas de protéger les espèces sauvages
Dans l’imaginaire collectif, « l’abeille » renvoie en général à la seule abeille domestique européenne, Apis mellifera. Pourtant, il existerait aujourd’hui entre 17 et 25 000 espèces d’abeilles sauvages dans le monde. On ignore encore bien des aspects de leurs modes de vie, de l’état de leurs populations et des menaces qui pèsent sur elles, bien que leur déclin à l’échelle mondiale commence à faire consensus.
Plant Pollinator Networks along a Gradient of Urbanisation
Statistical analyses. All statistical analyses were performed with R 2.14.0 software [37]. First, we checked for potential spatial autocorrelation in our data. To do so, we calculated the Bray-Curtis similarity index on the number of interactions performed by flower visitors on experimental plant communities in all pairs of sites [38]. The geographical distance between all pairs of sites was also calculated.
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