Search results for "pölyttäjät"
showing 6 items of 6 documents
Foraging Bumblebees Selectively Attend to Other Types of Bees Based on Their Reward-Predictive Value.
2020
Using social information can be an efficient strategy for learning in a new environment while reducing the risks associated with trial-and-error learning. Whereas social information from conspecifics has long been assumed to be preferentially attended by animals, heterospecifics can also provide relevant information. Because different species may vary in their informative value, using heterospecific social information indiscriminately can be ineffective and even detrimental. Here, we evaluated how selective use of social information might arise at a proximate level in bumblebees (Bombus terrestris) as a result of experience with demonstrators differing in their visual appearance and in thei…
Geranium sylvaticum increases pollination probability by sexually dimorphic flowers
2022
Sexual dimorphism is expressed as different morphologies between the sexes of a species. Dimorphism is pronounced in gynodioecious populations which consist of female and hermaphrodite individuals. The small size of female flowers in gynodioecious species is often explained by resource re-allocation to seed production instead of large flowers. However, pollinator attraction is critical to female fitness, and factors other than resource savings are needed to explain the small size of female flowers. We hypothesized that the floral size dimorphism in the perennial gynodioecious Geranium sylvaticum (L.) is adaptive in terms of pollination. To test this “pollination hypothesis,” we video record…
Geranium sylvaticum video recording data
2022
Dataset consists of three sheets. Insect visits data is the main data with insect visitors per visitor group, and their reproductive organ contacts during each visit. Seed data is the data of count seeds of the study plants. Visitation rate is the data on the number of visits per flower per hour by different visitor groups.
Maankäytön vaikutus kuminapeltojen kukkakärpäsiin (Syrphidae) ja muihin pölyttäjiin
2017
Maankäyttö on yksi voimakkaimmista luonnon monimuotoisuutta vähentävistä tekijöistä. Tehomaatalouden ja sen aiheuttaman maiseman yksinkertaistumisen vuoksi pölyttäjät ovat ajautuneet maailmanlaajuiseen kriisiin. Maisemaekologiassa tutkitaan, kuinka maisemarakenteen vaihtelevuus vaikuttaa eliöyhteisöjen monimuotoisuuteen. Maisemarakenteen vaihtelevuus -hypoteesin mukaan maiseman rakenteellisen vaihtelevuuden lisääntyessä erilaisia olosuhteita ja resursseja on enemmän lajien saatavilla, jolloin lajistollinen monimuotoisuus kasvaa. Useissa tutkimuksissa on havaittu, että maisemarakenteen vaihtelevuudella on yleensä myönteinen vaikutus eliöyhteisöjen monimuotoisuuteen. Maisemarakennetta voidaan…
Honeybees affect floral microbiome composition in a central food source for wild pollinators in boreal ecosystems
2021
AbstractBasic knowledge on dispersal of microbes in pollinator networks is essential for plant, insect, and microbial ecology. Thorough understanding of the ecological consequences of honeybee farming on these complex plant–pollinator–microbe interactions is a prerequisite for sustainable honeybee keeping. Most research on plant–pollinator–microbe interactions have focused on temperate agricultural systems. Therefore, information on a wild plant that is a seasonal bottleneck for pollinators in cold climate such as Salix phylicifolia is of specific importance. We investigated how floral visitation by insects influences the community structure of bacteria and fungi in Salix phylicifolia inflo…
Measuring, comparing and interpreting phenotypic selection on floral scent
2022
Natural selection on floral scent composition is a key element of the hypothesis that pollinators and other floral visitors drive scent evolution. The measure of such selection is complicated by the high-dimensional nature of floral scent data and uncertainty about the cognitive processes involved in scent-mediated communication. We use dimension reduction through reduced-rank regression to jointly estimate a scent composite trait under selection and the strength of selection acting on this trait. To assess and compare variation in selection on scent across species, time and space, we reanalyse 22 datasets on six species from four previous studies. The results agreed qualitatively with prev…