|Título:||Low bee visitation rates explain pollinator shifts to vertebrates in tropical mountains.|
|Identificador de recurso:||https://nph.onlinelibrary.wiley.com|
|Autor:||Dellinger, Anges S.; Pérez-Barrales, Rocio; Michelangeli, Fabián A.; Penneys, Darin S.; Fernández-Fernández, Diana M.; Schonenberger, Jurg.
|Descripción||– Evolutionary shifts from bee to vertebrate pollination are common in tropical mountains. Reduction in bee pollination efﬁciency under adverse montane weather conditions was proposed to drive these shifts. Although pollinator shifts are central to the evolution and diversiﬁcation of angiosperms, we lack experimental evidence of the ecological processes underlying such shifts.
– Here, we combine phylogenetic and distributional data for 138 species of the Neotropical plant tribe Merianieae (Melastomataceae) with pollinator observations of 11 and ﬁeld pollination experiments of six species to test whether the mountain environment may indeed drive
– We demonstrate that shifts from bee to vertebrate pollination coincided with occurrence at high elevations. We show that vertebrates were highly efﬁcient pollinators even under the harsh environmental conditions of tropical mountains, whereas bee pollination efﬁciency was lowered signiﬁcantly through reductions in ﬂower visitation rates. Furthermore, we show that pollinator shifts in Merianieae coincided with the ﬁnal phases of the Andean uplift and were contingent on adaptive ﬂoral trait changes to alternative rewards and mechanisms facilitating
– Our results provide evidence that abiotic environmental conditions (i.e. mountain climate) may indeed reduce the efﬁciency of a plant clade’s ancestral pollinator group and correlate with shifts to more efﬁcient new pollinators
|Claves||altitudinal gradient, ﬂoral evolution, pollen dosing, pollination efﬁciency, tropical Andes|
|Tipo de recurso||texto|