Dominant insect pollinators and their biological characteristics of pollination of Tamarix ramosissima in the southeast margin of Tarim basin
[Objective]In natural state,it depends on insect pollinators for reproduction.Thus it is nec-essary to clarify the insect pollinators and reveal their biological characteristics of pollination.[Methods]We observed insect pollinators at 09:00-19:00 on the first three days after T.ramosissima blooming,attempting to reveal biological characteristics of pollinators.We also analyzed and compared insect pollinators'capability to remove pollens from anther and deposit them on stigma,thus evaluating their pollination efficiency.[Re-sults]Among the insect visitors of T.ramosissima observed,the observed potential pollinators were Pseudapis femoralis,Colletes gigas,Hylaeus variegatus,Ceylalictus variegatus,Sphecodes grahami and Lucilia sericata;among them,the pollination efficiencies of Pseudapis femoralis(0.62)and Colletes gigas(0.60)were higher than Hylaeus variegatus(0.44),Sphecodes grahami(0.42),Ceylalictus variegatus(0.42)and Lucilia sericata(0.40)(P<0.05).The insect pollinators of T.ramosissima began to visit flowers close to 09:00 after sun-rise,and the peak of flower-visiting activities generally appeared at 12:00-13:00.This peak coincided with the peak of pollen viability of T.ramosissima.The number of visiting visiting gradually decreased over time.[Conclusion]In this study,we have noticed that the dominant insect pollinators of T.ramosissima are Pseudapis femoralis,Colletes gigas,Hylaeus variegatus,Ceylalictus variegatus,Sphecodes grahami and Lucilia sericata.Pseudapis femoralis and Colletes gigas are high-efficient pollinators.The peak of flower-visiting ac-tivities generally appears at 12:00-13:00,which coincided with the peak of pollen viability of T.ramosis-sima,reflecting the mutually beneficial symbiotic relationship between them.
desert and semi-desert ecological areasinsect pollinatorspollination efficiencyflower-visiting behaviorflower-visiting frequencysingle flower stay time
国家科技期刊平台
NSTL
万方数据
