Jeff Ollerton
University of Northampton
Publications 105
#1Paolo Biella (University of Milano-Bicocca)H-Index: 5
#2Asma Akter (Sewanee: The University of the South)H-Index: 1
Last.Jan KleckaH-Index: 9
view all 7 authors...
Species extinctions undermine ecosystem functioning, with the loss of a small subset of functionally important species having a disproportionate impact. However, little is known about the effects of species loss on plant-pollinator interactions. We addressed this issue in a field experiment by removing the plant species with the highest visitation frequency, then measuring the impact of plant removal on flower visitation, pollinator effectiveness and insect foraging in several sites. Our results...
1 CitationsSource
#1Jeff Ollerton (University of Northampton)H-Index: 34
#2Sigrid Liede-Schumann (University of Bayreuth)H-Index: 18
Last.Zelma Glebya Maciel Quirino (UFPB: Federal University of Paraíba)H-Index: 5
view all 75 authors...
Background and Aims Large clades of angiosperms are often characterized by diverse interactions with pollinators, but how these pollination systems are structured phylogenetically and biogeographically is still uncertain for most families. Apocynaceae is a clade of >5300 species with a worldwide distribution. A database representing >10 % of species in the family was used to explore the diversity of pollinators and evolutionary shifts in pollination systems across major clades and regions. Metho...
8 CitationsSource
#1Martine J. Barons (Warw.: University of Warwick)H-Index: 3
#2A.M. Hanea (University of Melbourne)H-Index: 11
Last.Norman L Carreck (University of Sussex)H-Index: 20
view all 13 authors...
Policy-makers often need to rely on experts with disparate fields of expertise when making policy choices in complex, multi-faceted, dynamic environments such as those dealing with ecosystem services. For policy-makers wishing to make evidence-based decisions which will best support pollinator abundance and pollination services, one of the problems faced is how to access the information and evidence they need, and how to combine it to formulate and evaluate candidate policies. This is even more ...
1 CitationsSource
#1André Rodrigo Rech (State University of Campinas)H-Index: 7
#2Leonardo R. Jorge (State University of Campinas)H-Index: 6
Last.Marlies Sazima (State University of Campinas)H-Index: 33
view all 4 authors...
1 CitationsSource
#1Nicholas J. Balfour (University of Sussex)H-Index: 7
#2Jeff Ollerton (University of Northampton)H-Index: 34
Last.Francis L. W. Ratnieks (University of Sussex)H-Index: 64
view all 4 authors...
The long-term decline of wild and managed insect pollinators is a threat to both agricultural output and biodiversity, and has been linked to decreasing floral resources. Further insight into the temporal relationships of pollinators and their flowering partners is required to inform conservation efforts. Here we examined the phenology of British: (i) pollinator activity; (ii) insect-pollinated plant flowering; and (iii) extinct and endangered pollinator and plant species. Over 1 million records...
8 CitationsSource
#1Daniel W. Carstensen (UCPH: University of Copenhagen)H-Index: 11
#2Kristian Trøjelsgaard (AAU: Aalborg University)H-Index: 17
Last.Leonor Patricia C. Morellato (UNESP: Sao Paulo State University)H-Index: 17
view all 4 authors...
Specialization of species is often studied in ecology but its quantification and meaning is disputed. More recently, ecological network analysis has been widely used as a tool to quantify specialization, but here its true meaning is also debated. However, irrespective of the tool used, the geographic scale at which specialization is measured remains central. Consequently, we use data sets of plant-pollinator networks from Brazil and the Canary Islands to explore specialization at local and regio...
5 CitationsSource
#1Bo Dalsgaard (Wild Center)H-Index: 21
#2Jonathan D. Kennedy (Wild Center)H-Index: 9
Last.Carsten Rahbek (Wild Center)H-Index: 65
view all 11 authors...
Species traits are thought to predict feeding specialization and the vulnerability of a species to extinctions of interaction partners, but the context in which a species evolved and currently inhabits may also matter. Notably, the predictive power of traits may require that traits evolved to fit interaction partners. Furthermore, local abiotic and biotic conditions may be important. On islands, for instance, specialized and vulnerable species are predicted to be found mainly in mountains, where...
10 CitationsSource
#1Bo DalsgaardH-Index: 21
Last.Carsten RahbekH-Index: 65
view all 11 authors...
#1Jeferson Vizentin-Bugoni (State University of Campinas)H-Index: 11
#2Pietro K. Maruyama (State University of Campinas)H-Index: 13
Last.Marlies Sazima (State University of Campinas)H-Index: 33
view all 6 authors...
Most tropical plants rely on animals for pollination, thus engaging in complex interaction networks. Here, we present a global overview of pollination networks and point out research gaps and emerging differences between tropical and non-tropical areas. Our review highlights an uneven global distribution of studies biased towards non-tropical areas. Moreover, within the tropics, there is a bias towards the Neotropical region where partial networks represent 70.1% of the published studies. Additi...
12 CitationsSource
By facilitating plant reproduction, pollinators perform a crucial ecological function that supports the majority of the world's plant diversity, and associated organisms, and a significant fraction of global agriculture. Thus, pollinators are simultaneously vital to supporting both natural ecosystems and human food security, which is a unique position for such a diverse group of organisms. The past two decades have seen unprecedented interest in pollinators and pollination ecology, stimulated in...
62 CitationsSource