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The Effects Of Patch Size On Hummingbird Visitation And Pollination In Habracanthus Belpharohachis, November 2000, Monica Lisa Saldaña
The Effects Of Patch Size On Hummingbird Visitation And Pollination In Habracanthus Belpharohachis, November 2000, Monica Lisa Saldaña
Tropical Ecology and Conservation [Monteverde Institute]
In tropical forests, plant species are sparsely distributed and in order to increase their probability of pollination they have developed bright, showy flowers that offer nectar to attract pollinators. In this study, I examined how the pollination rates are affected by the number of inflorescences present in patches of Habracanthus belpharohachis. In order to do this, I measured the percent of pollinated flowers from 22 small patches with one to five inflorescences, and flowers from 14 large patches with more than 15 inflorescences. I also recorded the number of visitations by the primary pollinator of H. belpharohachis, the Purple-throated Mountain-gem …
Nectar Robbery And Pollination By Hummingbirds In Relation To Morphological And Physiological Features Of Gesneriaceae, November 2000, Catherine L. Hein
Nectar Robbery And Pollination By Hummingbirds In Relation To Morphological And Physiological Features Of Gesneriaceae, November 2000, Catherine L. Hein
Tropical Ecology and Conservation [Monteverde Institute]
Many flowers depend on hummingbirds for pollination. However, some hummingbirds are known to rob flowers rather than pollinate them. High robbery rates could decrease pollination reproductive fitness in these plants. Corolla length, bract coverage, nectar volume and sugar concentration, were hypothesized in this study to affect robbery rates. A long corolla, short bract, and high nectar volume and concentration were hypothesized to increase the rate of robbery. Pollination rates were also expected to increase with a high nectar volume and sugar concentration. Data were collected on Alloplectus tetragonus, Besleria formosa, and Drymonia rubra (Gesneriaceae) in the Santa Elena Reserve for …
Changes In Hummingbird Species Richness And Abundance In A Forest Fragment And Agricultural Ecotones, November 2000, Stephen Smith
Changes In Hummingbird Species Richness And Abundance In A Forest Fragment And Agricultural Ecotones, November 2000, Stephen Smith
Tropical Ecology and Conservation [Monteverde Institute]
Hummingbirds are important pollinators in tropical forests, and their behavior is vitally important to the plants they pollinate. As the tropics become more and more fragmented, hummingbirds will play the increasingly important role of long-distance pollination of many plants between isolated tracts of forest. This study looked at the different responses of hummingbirds to a forest fragment and the surrounding agricultural land. Hummingbirds preferred edge to open areas and forest, with three feeders out of 18 getting 126 of the 482 total visits, compared to 91 total visits of the second most visited feeder. Further, the birds preferred an open …