Características del néctar y visitas de insectos a flores de Nicotiana glauca L. (Solanaceae): ¿Asociadas a cambios de la temperatura y humedad del ambiente?
Date
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Ecología en Bolivia
Abstract
Evaluamos el grado de asociación de la temperatura y la humedad, con el volumen, la concentración y la composición del néctar en Nicotiana glauca en un clima seco. Examinamos además, la asociación entre la temperatura y las visitas de los insectos a las flores. La temperatura y la humedad no están asociadas con las características del néctar y, por tanto, factores tales como la edad de la flor, morfología de la flor, valores r/P (refractividad/reducción relativa de la presión) del néctar y el robo del néctar podrían ser los que estén actuando sobre dichas características. El número de visitas de insectos está correlacionada con la temperatura. El número de abejorros (Xylocopa hirsutissima hirsutissima) visitando flores incrementa a medida que la temperatura aumenta, mientras que el número de abejas (Apis mellifera) disminuye. Sin embargo, la asociación observada entre la temperatura y los individuos de A. mellifera, podría estar reflejando la disponibilidad del recurso.
We studied the intensity of association of temperature and humidity with nectar volume, concentration and composition of Nicotiana glauca, in a dry climate. We also examined the association between temperature and insect visits to flowers. Temperature and humidity are not associated with nectar characteristics and thus, factors like flower age, morphological traits of the flowers, r/P (refractivity/ relative pressure reduction) values of nectar and néctar robbing may be acting on those characteristics. The number of insect visits to flowers were correlated with ambient temperature. The number of bumblebees (Xylocopa hirsutissima hirsutissima) visiting flowers increased with higher ambient temperature, while the number of honey bees (Apis mellifera) decreased. However the association observed between honey bees and temperature might be actually reflecting resource availability ratherthan temperature dependence.
We studied the intensity of association of temperature and humidity with nectar volume, concentration and composition of Nicotiana glauca, in a dry climate. We also examined the association between temperature and insect visits to flowers. Temperature and humidity are not associated with nectar characteristics and thus, factors like flower age, morphological traits of the flowers, r/P (refractivity/ relative pressure reduction) values of nectar and néctar robbing may be acting on those characteristics. The number of insect visits to flowers were correlated with ambient temperature. The number of bumblebees (Xylocopa hirsutissima hirsutissima) visiting flowers increased with higher ambient temperature, while the number of honey bees (Apis mellifera) decreased. However the association observed between honey bees and temperature might be actually reflecting resource availability ratherthan temperature dependence.
Description
No. 33