Pollination niches,which encompass the factors influencing pollen exchange among angiosperms,are fundamental to understanding reproductive success and the intricate eco-evolutionary dynamics of plants.In this study,we...Pollination niches,which encompass the factors influencing pollen exchange among angiosperms,are fundamental to understanding reproductive success and the intricate eco-evolutionary dynamics of plants.In this study,we investigated pollination niche shift among four sympatric Eriosyce cacti with restricted distributions in the South American Mediterranean region.Utilizing a comprehensive approachdincluding pollination niche analysis,pollinator color perception studies,reproductive output assessments,molecular phylogenetics,gene flow analyses,and species distribution modelingdwe revealed a significant pollination niche displacement in E.chilensis and its variety,E.chilensis var.albidiflora.These taxa transitioned from a hummingbird-pollinated system prevalent in the Eriosyce sect.Neoporteria,characteristic of their sister species E.litoralis,to a bee-pollination strategy akin to that of the co-occurring species E.mutabilis.This shift highlights a simultaneous convergence of E.chilensis toward E.mutabilis and divergence from E.litoralis in pollination strategies,providing adaptive advantages by reducing pollen limitation and enhancing seed production.The morphological and flowering phenological similarities between E.chilensis and E.mutabilis suggest the evolution of a shared advertising display,potentially indicative of floral mimicry,wherein both species benefit from attracting shared bee pollinators.Genomic analyses reveal distinct pollinator-driven selection pressures,with E.chilensis/E.albidiflora exhibiting traits that promote reproductive isolation from E.litoralis,supporting a scenario of rapid speciation occurring within the past half of million years in the absence of geographic barriers.These findings underscore the pivotal role of pollinator interactions in shaping angiosperm speciation and biodiversity,highlighting their dynamic influence on ecological and evolutionary processes.展开更多
A molecular phylogenetic analysis of most of the species of Perezia reveals that, as traditionally defined, the genus is not monophyletic with two species more closely related to Nassauvia than to Perezia. In addition...A molecular phylogenetic analysis of most of the species of Perezia reveals that, as traditionally defined, the genus is not monophyletic with two species more closely related to Nassauvia than to Perezia. In addition, our results show that Burkartia （Perezia） lanigera is related to Acourtia and is the only member of that clade in South America. The remaining species are monophyletic and show a pattern of an early split between a western temperate and an eastern subtropical clade of species. Within the western clade, the phylogeny indicates a pattern of diversification that proceeded from southern, comparatively low-elevation habitats to southern high-elevation habitats, and ultimately into more northern high-elevation habitats. The most derived clades are found in the high central Andes, where significant radiation has occurred.展开更多
Current Zoology 2017,57(2):162-174 doi:https://doi.Org/10.1093/czoolo/57.2.162 The paper incorrectly identified the cockroach in this study as the non-native cockroach named Blatta orientalis.This cockroach should be ...Current Zoology 2017,57(2):162-174 doi:https://doi.Org/10.1093/czoolo/57.2.162 The paper incorrectly identified the cockroach in this study as the non-native cockroach named Blatta orientalis.This cockroach should be identified as the native cockroach,Moluchia brevipennis.展开更多
基金supported by the Fondo Nacional de Desarrollo Científico y Tecnologico[1160583 and 1211441 to P.C.G.,1240877 to G.O.C.]the Comision Nacional de Investigacion Científica y Tecnologica PIA[REDII 170031 to P.C.G., G.O.C.]+3 种基金ANID PIA/BASAL[FB210006]to the Instituto de Ecología y Biodiversidad(IEB)ANID PIA/BASAL[PFB210018]to the Cape Horn International Center(CHIC)A.V.M.acknowledges the support of ANID/BASAL FB210006 by the Institute of EcologyBiodiversity(IEB)with counterpart contributions from the Anglo-American Foundation.B.M.M.is grateful to the ANID Scholarship 20210673.
文摘Pollination niches,which encompass the factors influencing pollen exchange among angiosperms,are fundamental to understanding reproductive success and the intricate eco-evolutionary dynamics of plants.In this study,we investigated pollination niche shift among four sympatric Eriosyce cacti with restricted distributions in the South American Mediterranean region.Utilizing a comprehensive approachdincluding pollination niche analysis,pollinator color perception studies,reproductive output assessments,molecular phylogenetics,gene flow analyses,and species distribution modelingdwe revealed a significant pollination niche displacement in E.chilensis and its variety,E.chilensis var.albidiflora.These taxa transitioned from a hummingbird-pollinated system prevalent in the Eriosyce sect.Neoporteria,characteristic of their sister species E.litoralis,to a bee-pollination strategy akin to that of the co-occurring species E.mutabilis.This shift highlights a simultaneous convergence of E.chilensis toward E.mutabilis and divergence from E.litoralis in pollination strategies,providing adaptive advantages by reducing pollen limitation and enhancing seed production.The morphological and flowering phenological similarities between E.chilensis and E.mutabilis suggest the evolution of a shared advertising display,potentially indicative of floral mimicry,wherein both species benefit from attracting shared bee pollinators.Genomic analyses reveal distinct pollinator-driven selection pressures,with E.chilensis/E.albidiflora exhibiting traits that promote reproductive isolation from E.litoralis,supporting a scenario of rapid speciation occurring within the past half of million years in the absence of geographic barriers.These findings underscore the pivotal role of pollinator interactions in shaping angiosperm speciation and biodiversity,highlighting their dynamic influence on ecological and evolutionary processes.
文摘A molecular phylogenetic analysis of most of the species of Perezia reveals that, as traditionally defined, the genus is not monophyletic with two species more closely related to Nassauvia than to Perezia. In addition, our results show that Burkartia （Perezia） lanigera is related to Acourtia and is the only member of that clade in South America. The remaining species are monophyletic and show a pattern of an early split between a western temperate and an eastern subtropical clade of species. Within the western clade, the phylogeny indicates a pattern of diversification that proceeded from southern, comparatively low-elevation habitats to southern high-elevation habitats, and ultimately into more northern high-elevation habitats. The most derived clades are found in the high central Andes, where significant radiation has occurred.
文摘Current Zoology 2017,57(2):162-174 doi:https://doi.Org/10.1093/czoolo/57.2.162 The paper incorrectly identified the cockroach in this study as the non-native cockroach named Blatta orientalis.This cockroach should be identified as the native cockroach,Moluchia brevipennis.
