Dinámica de la fenología y visitantes florales de dos bromelias terrestres de un páramo de Colombia

Phenology and the floral visitors of Puya nitida and Puya trianae were evaluated at a paramo region of Chingaza National Natural Park, Colombia. During 1 year, field trips were made and diverse aspects of their spatial distribution, floral morphology and phenology, and their floral visitors were registered. Both, P. nitida and P. trianae present similar floral morphology fitting to ornithophily, but with differences in size and length of reproductive structures; both are separated spatially being dominant in different altitude and habitats; bloom in different times of the year indicating a clear temporal separation on blooming patterns. Both plants share visits from 2 bird species that because of their body differences can be adjusted to the flowers to place the pollen on different parts of their bodies and transport it to the correct plant in each visit. All these floral mechanisms from a spatio-temporal perspective, enable the use of the pollinators by P. nitida and P. trianae successfully, allowing coexistence among these 2 bromeliads, decreasing negative effects that may have in the pollen flow, outcrossing, and finally, in their sexual reproduction.