Abstract (eng)
Within this thesis the pollination biology of six sympatric Araceae species, Anthurium hoffmannii, A. lancifolium, A. ochranthum, A. pluricostatum, Spathiphyllum phryniifolium and S. silvicola, in a lowland rainforest in the southwest of Costa Rica was studied. Plant observations and analysis as well as various experiments during a period of two months (January to March 2016) served to compare morphological and ecological differences in relation to pollination. As so far known, Neotropical distributed, fragrance collecting euglossine-bees (orchid bees), pollen collecting Meliponini (stingless bees) or small, inconspicuous Curculionidae (wheevils) are considered to be pollinators, but for the mentioned species little data exists.
For all investigated species of both genera, Apidae (Euglossini and Meliponini), Halictidae, Chrysomelidae and Curculionidae function as pollinators. Each of the six species was attractive to specific pollinators while some visitors overlapped. Temporal (different fragrance intensity throughout the day) and qualitative (different fragrance bouquets) differences make a coexistence of various pollinators for each plant species possible. To sum up, there is a reproductive isolation of sympatric flowering Araceae species due to inflorescence fragrances and specific time pattern in scent production.