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Abundance drives broad patterns of generalisation in plant–hummingbird pollination networks
Author(s) -
Simmons Benno I.,
VizentinBugoni Jeferson,
Maruyama Pietro K.,
Cotton Peter A.,
MarínGómez Oscar H.,
Lara Carlos,
RoseroLasprilla Liliana,
Maglianesi María A.,
OrtizPulido Raul,
Rocca Márcia A.,
Rodrigues Licléia C.,
Tinoco Boris A.,
Vasconcelos Marcelo F.,
Sazima Marlies,
Martín González Ana M.,
Sonne Jesper,
Rahbek Carsten,
Dicks Lynn V.,
Dalsgaard Bo,
Sutherland William J.
Publication year - 2019
Publication title -
oikos
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.672
H-Index - 179
eISSN - 1600-0706
pISSN - 0030-1299
DOI - 10.1111/oik.06104
Subject(s) - hummingbird , pollinator , abundance (ecology) , pollination , relative species abundance , biology , ecology , key (lock) , null model , pollen
Abundant pollinators are often more generalised than rare pollinators. This could be because abundant species have more chance encounters with potential interaction partners. On the other hand, generalised species could have a competitive advantage over specialists, leading to higher abundance. Determining the direction of the abundance–generalisation relationship is therefore a ‘chicken‐and‐egg’ dilemma. Here we determine the direction of the relationship between abundance and generalisation in plant–hummingbird pollination networks across the Americas. We find evidence that hummingbird pollinators are generalised because they are abundant, and little evidence that hummingbirds are abundant because they are generalised. Additionally, most patterns of species‐level abundance and generalisation were well explained by a null model that assumed interaction neutrality (interaction probabilities defined by species relative abundances). These results suggest that neutral processes play a key role in driving broad patterns of generalisation in animal pollinators across large spatial scales.