CATÁLOGO POLÍNICO DE PLANTAS DO PANTANAL

Abstract

Disorders, such as fire and flooding, work as environmental filters structuring biological communities. These events, in some ecosystems, work as pulses of resources, forming populations and promoting complex interactions. Their effects are usually studied separately, but they act synergistically and are still unclear. Here we proposed to evaluate how fire and flood affect plant-pollinator interactions in Pantanal. We performed four sampling rounds between August/2022 and April/2023, in 18 plots equally distributed in three treatments of fire: control (no fire), early (fire at the peak of drought) and modal (fire at the end of drought season). In each plot, eight sampling units were established randomly, resulting in 576 sampling units. In a zoo-centered analysis of the pollination network, the floral visitors have been observed regarding their behavior (pollinator or robbers), collected, stored in sterile tubes. For the pollen reference collection, wecollected flowers in pre-anthesis from 89 plant species distributed in 31 f amilies.. Asteraceae (28 species), Fabaceae (27), Malvaceae (21) e Euphorbiaceae (13) constituted the richest families. We have prepared slides in gelatin colored with fuchsin and proceeded to light microscopy. We have been morphologically describing the pollengrains for the pollen catalog, combined with pictures and information of species, flowers and pollen grains. The results of this study will help us understand how fire and floods affect plant-pollinator interaction networks and will help subsidize actions of conservation and handling of biodiversity in Pantanal.