598 results — topic: Insect Ecology
Phenology of selected cavity-nesting Hymenoptera and flowering plant taxa in the Colorado Rocky Mountains from 2008 to 2010.
Data come from fourteen sites in the West Elk Mountains of Colorado, USA. The study aimed to identify the factors regulating phenology of plants and cavity-nesting insects, and to determine the likelihood of asynchrony between flowering and pollinator emergence under climate change. Numbers of flowe
Data for: The impacts of bioenergy pine plantation management practices on bee communities
1. Cultivation of bioenergy feedstocks is a growing land-use worldwide, yet we have a poor understanding of how bioenergy crop management practices affect biodiversity. This knowledge gap is particularly acute for candidate cellulosic bioenergy feedstocks, such as tree plantations, and for organisms
Consequences of nectar robbing for realized male function in a hummingbird-pollinated plant
The effects of nectar robbers on plants and their mutualistic pollinators are poorly understood due, in part, to the paucity of studies examining male reproductive success in nectar-robbed plants. Here we measured the effects of a nectar-robbing bumblebee, Bombus occidentalis, on realized male repro
Conservation of insect diversity: a habitat approach
The scale of resource specialization and the distribution and abundance of lycaenid butterflies
How hostplant specialization and abundance affect the relative abundance and distribution of lycaenid butterflies is considered and it is suggested that abundance-distribution relationships might emerge at regional and continental scales if local abundance were averaged across many habitat types.
The ecological effects of nectar robbers, with an emphasis on the reproductive biology of <i>Corydalis caseana</i>
Division of labor and worker caste efficiency in the western thatching ant Formica obscuripes
The Commonality of Herbivorous Trophic Links with Regard to Spatial Scale
Bumblebee foraging responses to variation in floral scent and color in snapdragons (Antirrhinum: Scrophulariaceae)
We examined the roles of floral scent and color in attracting bumblebees (Bombus spp.) to snapdragon flowers (Antirrhinum, Sonnet cultivar). Corolla color differences covaried with differences in floral scent emissions in two inbred lines of snapdragon. White-flowered plants emitted methyl cinnamate
Three Harpellales that live in one species of aquatic chironomid larva
Two new species of harpellid gut fungi, Smittium fecundum and Stachylina robusta, were found living in larvae of Psectrocladius sp. (Diptera: Chironomidae) in a high-altitude kettle pond in the Rocky Mountains of Colorado. A third species of Harpellales, Smittium mucronatum, previously known only fr
Nectar-robbing bumble bees reduce the fitness of <i>Ipomopsis aggregata</i> (Polemoniaceae)
Flower constancy, insect psychology, and plant evolution
The way in which floral parameters, such as interplant distances, nectar rewards, flower morphology, and floral color affect constancy is considered, and the implications of pollinator constancy for plant evolution are discussed.
Effects of Local Density on Pollination and Reproduction in <i>Delphinium nuttallianum</i> and <i>Aconitum columbianum</i> (Ranunculaceae)
Plant populations vary in density both naturally and as a consequence of anthropogenic impacts. Density in turn can influence pollination by animals. For example, plants in dense populations might enjoy more frequent visitation if pollinators forage most efficiently in such populations. We explored