Effects of the availability of floral resources and neighboring plants on nectar robbery in a specialized pollination system  

作　　者：Júlia Mendonça Almeida Caio César Corrêa Missagia Maria Alice Santos Alves 

机构地区：[1]Graduação,Instituto de Biociências,Universidade Federal do Estado do Rio de Janeiro(UNIRIO),CEP,Avenida Pasteur,458,Rio de Janeiro 22290-240,Brazil [2]Departamento de Ecologia,Programa de Pós-Graduação em Ecologia e Evolução,Instituto de Biologia Roberto Alcantara Gomes(IBRAG),Laboratório de Ecologia de Aves e Comportamento,Universidade do Estado do Rio de Janeiro(UERJ),Rua São Francisco Xavier,524 Rio de Janeiro,RJ,CEP,Rio de Janeiro 20550-011,Brazil [3]Departamento de Ecologia,IBRAG,Laboratório de Ecologia de Aves UERJ.Rua São Francisco Xavier,524 Rio de Janeiro,RJ,CEP,Rio de Janeiro 20550-011,Brazil

出　　处：《Current Zoology》2022年第5期541-548,共8页动物学报（英文版）

基　　金：the Brazilian National Council for Scientific and Technological Development(CNPq)with a research grant to Maria Alice S.Alves(PQ processes#306.579/2018-9);Carlos Chagas Filho Foundation for Research Support of the State of Rio de Janeiro(FAPERJ)supported Maria Alice S.Alves with research grant(CNE process#E-26/202.835/2018).

摘　　要：Many plants pollinated by nectar-foraging animals have to maintain a balance between legitimate visitor attraction strategies and mechanisms that minimize illegitimate visits.This study investigated how floral display and neighboring species composition influences nectar robbing by hummingbirds in the tropical ornithophilous herb Heliconia spathocircinata.We tested the role of inflorescence display,flower abundance,and neighboring species in the reduction of nectar robbing in H.spathocircinata.Our results indicate that nectar robbing hummingbird activity was higher in moderately large inflorescence displays and that the frequency of nectar robbing in H.spathocircinata decreases with increased flower abundance and the presence of neighboring plant species.Neighboring non-ornithophilous plants decreased the frequency of nectar robbing in H.spathocircinata flowers to a greater extent than ornithophilous ones.These results suggest that nectar robbing hummingbirds are attracted to similar conditions that attract legitimate visitors and that spatial aggregation and mixed-species displays may represent a mechanism to dilute nectar robbing effects at an individual level.

关 键 词：Brazilian Atlantic forest DENSITY floral antagonists Heliconiaceae 

分 类 号：Q94[生物学—植物学]