La diversité des abeilles parisiennes

Abstract

The diversity of Parisian bees. - Despite the forever increasing urbanization, cities often shelter a significant biodiversity. As many other taxa, wild bees may find refuge in urban areas because of relative favorable conditions compared to intensive agricultural environments. In this study, we compiled our joint work to extend the list of Parisian bees. Over 4 years of monitoring (2011, 2014, 2015, 2016), we recorded 87 bee species in intra-muros Paris. In 2016 we added net captures to our sampling procedures with colored pan traps, which provided 11 additional species. The assemblage now represents 8.8 % of the French fauna of Apoïdae. However, this assemblage is mostly dominated by Halictidae and includes only few kleptoparasitic species highlighting an impoverished community.

A DNA barcode-based survey of wild urban bees in the Loire Valley, France

“…Other studies have reported similar results with halictid bees representing the dominant group between 52.7 and 98.7% of records sampled in different countries and habitats 54 – 60 . Halictidae has also been the most abundant family in bee monitoring studies of other French cities 11 , 12 , 61 . Pan-trapping has previously been associated with an excessive catching of halictids compared to other families collected 62 .…”

Pollinator Specific Richness and Their Interactions With Local Plant Species: 10 Years of Sampling in Mediterranean Habitats

“…Cleptoparasitic bees are more difficult to catch because they only visit flowers to gather nectar and fly rapidly close to the ground to find their host's nests (Oertli et al 2005). However, whereas only 0.5% of cleptoparasitic bee species were found during the 3-d sampling in 2016 (Geslin et al 2018), we increased this figure to 12% with the present compilation of surveys. Several studies recorded approximately 17% of the parasitic bee species in urban or grassland habitats (Oertli et al 2005, Fortel et al 2014.…”

“…These two methods are thus complementary and can be combined for a better estimation of pollinator diversity (Westphal et al 2008). All ecological traits, such as nesting habits and lectism of wild bee species, are reported in Supp Table 1 (online only) according to the expertise of D. Genoud and M. Aubert (Carré 2008, Lugassy 2016, Genoud 2017, Geslin et al 2018, Ropars et al 2018.…”

“…They consisted of onetime bee surveys (Samplings 1 to 4). In May 2016, a collective 3-d sampling campaign was completed as part of a training course on wild bees (Sampling 5) (Geslin et al 2018). Between 2017 and 2018 (Samplings 6 to 9), more intensive surveys were carried out every week for 2-5 mo (Schurr et al 2019, Ropars et al 2020.…”

“…Indeed, these data are essential for IUCN European Red List updates as well as National Red List establishment, especially because little is known about pollinator species presence in southern France. As few examples, in Calanques National Park, we provided the first national record of Nomada rubricoxa Scharz, 1977 (Hymenoptera: Apidae) in May 2016 (Geslin et al 2018), and specimens of a new Pelecocera Meigen, 1822 (Diptera: Syrphidae) species were collected in 2017 and 2018. The description of this new Pelecocera species is underway and a publication is in preparation (see Lair et al 2019).…”