Poster (Scientific congresses and symposiums)
Spatio-temporal floral resource shifts in Belgium
Jacquemin, Floriane; Violle, C; Coppée, Thomas et al.
2018Eurbee 8
 

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Abstract :
[en] For the last decades we have been facing up a large and worldwide bee decline. Land use changes, such as agricultural intensification and urbanization, are largely mentioned to be responsible of this decline as they are known to have induced global biodiversity losses and a change in the nesting and floral resources for wild bees. Our study aims to investigate the link between changes in floral resources and decline of wild bees in Belgium. In order to do so, we compiled a large historical dataset of plant species occurrences (almost 7 million data) at the country scale and we reviewed floral resources lists at the plant genus level for five declining bumblebees species (Bombus humilis, B. jonellus, B. ruderatus, B. soroeensis, B. sylvarum et B. lucorum). We splitted our resulting databases in two historical periods (1930-1970 and after 1970) corresponding to large contrasted landscape contexts in Belgium. We corrected sample bias for plants and bumblebees using Hurlbert rarefaction method. The resulting dataset allows us to observe the spatially and temporally changes in the floral resource diversity (number of genus identified as resources) and richness (% of genus identified as resources on the total number of plant genuses) by square of 4*4 km at Belgian scale and for each bumblebee species. Land use data were used to interpret these dynamics. We highlighted major changes in resource diversity for most declining bumblebees. Some squares observed a significant loss of genus richness (> 50% decrease ). These dynamics were concomitant with the expansion of cities and the agricultural landscape homogenization. Our results contribute to a better understanding of the bee decline causes. Extended to other pollinator species, our results can be used to improve the effectiveness of targeted conservation measures in floral resource deficient areas.
Disciplines :
Zoology
Author, co-author :
Jacquemin, Floriane
Violle, C
Coppée, Thomas
Folschweiller, Morgane ;  Université de Mons > Faculté des Sciences > Zoologie
Drossart, Maxime ;  Université de Mons > Faculté des Sciences > Zoologie
Rasmont, Pierre ;  Université de Mons > Faculté des Sciences > Service de Zoologie
Dufrene, Marc
Language :
English
Title :
Spatio-temporal floral resource shifts in Belgium
Publication date :
18 September 2018
Number of pages :
1
Event name :
Eurbee 8
Event place :
Gand, Belgium
Event date :
2018
Research unit :
S869 - Zoologie
Research institute :
R100 - Institut des Biosciences
Available on ORBi UMONS :
since 21 January 2019

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