[en] Network analysis approach was used to investigate species composition, their interactions and dynamics over time to relate network patterns to ecological processes. Historical database used contains information about plant species visited at sampling time for ~ 50,000 identified specimens since 1900. Several indices were calculated to characterize the network topology (connectance, mean number of links, modularity, nestedness, H2fun, d2fun,…) and the ecological roles of bees (participation (c) and connectivity (z) coefficients). As a result, we identified a loss of bee species specialization through a loss of very specialist bee species and a shift to more generalist species. This work highlights the interest of compiling opportunistic naturalist databases and systematically informing the host plants on which species are observed.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Jacquemin, Floriane ; Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
Violle, Cyrille; Centre National de la Recherche Scientifique - CNRS > Centre d'Ecologie Fonctionnelle et Evolutive
Munoz, François; French Institute of Pondicherry
Taudière, Adrien; Centre National de la Recherche Scientifique - CNRS > Centre d'Ecologie Fonctionnelle et Evolutive
Rasmont, Pierre; Université de Mons - UMONS > Laboratoire de zoologie
Dufrêne, Marc ; Université de Liège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
Language :
English
Title :
Plant diversity loss forces shift in ecological strategies for wild bees : Insights from historical time series at a country-wide scale
Publication date :
27 October 2016
Event name :
Sfécologie 2016, International Conference of Ecological Sciences
Event date :
Du 24 octobre 2016 au 28 octobre 2016
Funders :
BELBEES Project (BR/132/A1/BELBEES) SAPOLL Project (Interreg V fwvl), co-financed by the European Regional Development Fund ERC Constraints (Grant ERC - StG - 2014 - 639706 - CONSTRAINTS)