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Loss of pollinator specialization revealed by historical opportunistic data: Insights from network-based analysis

PloS one, 2020-07, Vol.15 (7), p.e0235890-e0235890 [Peer Reviewed Journal]

COPYRIGHT 2020 Public Library of Science ;COPYRIGHT 2020 Public Library of Science ;2020 Jacquemin et al. This is an open access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;2020 Jacquemin et al 2020 Jacquemin et al ;ISSN: 1932-6203 ;EISSN: 1932-6203 ;DOI: 10.1371/journal.pone.0235890 ;PMID: 32658919

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Title:
Loss of pollinator specialization revealed by historical opportunistic data: Insights from network-based analysis
Author: Jacquemin, Floriane ; Violle, Cyrille ; Munoz, François ; Mahy, Grégory ; Rasmont, Pierre ; Roberts, Stuart P. M ; Vray, Sarah ; Dufrêne, Marc
Lázaro, Amparo
Subjects: Bees ; Biodiversity ; Biological research ; Biology and Life Sciences ; Biology, Experimental ; Environmental changes ; Environmental research ; Environmental sciences & ecology ; Flowers & plants ; Functional groups ; Habitat (Ecology) ; Habitat modification ; Insect pollination ; Life sciences ; Modification ; Modularity ; Modules ; Natural history ; New records ; Plant reproduction ; Pollination by insects ; Pollinators (Animals) ; Research and Analysis Methods ; Sciences de l’environnement & écologie ; Sciences du vivant ; Social Sciences ; Specialization ; Species ; Studies ; Valéry, Paul (1871-1945)
Is Part Of: PloS one, 2020-07, Vol.15 (7), p.e0235890-e0235890
Description: We are currently facing a large decline in bee populations worldwide. Who are the winners and losers? Generalist bee species, notably those able to shift their diet to new or alternative floral resources, are expected to be among the least vulnerable to environmental change. However, studies of interactions between bees and plants over large temporal and geographical scales are limited by a lack of historical records. Here, we used a unique opportunistic century-old countrywide database of bee specimens collected on plants to track changes in the plant-bee interaction network over time. In each historical period considered, and using a network-based modularity analysis, we identified some major groups of species interacting more with each other than with other species (i.e. modules). These modules were related to coherent functional groups thanks to an a posteriory trait-based analysis. We then compared over time the ecological specialization of bees in the network by computing their degree of interaction within and between modules. "True" specialist species (or peripheral species) are involved in few interactions both inside and between modules. We found a global loss of specialist species and specialist strategies. This means that bee species observed in each period tended to use more diverse floral resources from different ecological groups over time, highly specialist species tending to enter/leave the network. Considering the role and functional traits of species in the network, combined with a long-term time series, provides a new perspective for the study of species specialization.
Publisher: San Francisco: Public Library of Science
Language: English
Identifier: ISSN: 1932-6203
EISSN: 1932-6203
DOI: 10.1371/journal.pone.0235890
PMID: 32658919
Source: GFMER Free Medical Journals
PubMed Central
Public Library of Science (PLoS)
ProQuest Central
DOAJ Directory of Open Access Journals

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Loss of pollinator specialization revealed by historical opportunistic data: Insights from network-based analysis

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