Plantas carnívoras em uma vereda na região sul de Goiás : conservação, estrutura de populações e educação ambiental

Abstract

In the veredas integrating the richness of species are carnivorous plants of Droseraceae and Lentibulariaceae. For these taxa this study investigated: the composition of species in a vereda of Quirinópolis, GO; how species are distributed on site; if the luminosity, the height of the vegetal stratum and the absence of agglomerates of arboreal-shrub species are associated with the spatial distribution of carnivorous; if species richness and abundance are greater in the rainy season; and whether there is a variation in the occurrence of the reproductive stage among populations throughout the year. Data were collected between August 2016 and September 2017. The method of walking in the floristic survey and permanent transects (arranged perpendicular to the drainage channel, 10 m apart, were distributed in 40 plots of 25 m2 each ) to study the pattern of spatial distribution and reproductive phenology. We sampled 14 species distributed in three genera: Drosera communis A.St.-Hil. D. grantsaui Rivadavia; Genlisea filiformis A.St.-Hil. G. pygmaea A.St.- Hil. Utricularia amethystina Salzm. ex A.St.-Hil. & Girard; U. cucullata A.St.-Hil. & Girard; U. gibba L. U. hispida Lam. U. nana A.St.-Hil. & Girard; U. nervosa G. Weber ex Benj. U. pusilla Vahl; U. subulata L. U. trichophylla Spruce ex Oliv. e U. triloba Benj. According to the Morisita Dispersion Index, all species had aggregate spatial distribution. Statistically, plant height did not influence species richness (p = 0.111; r² = 0.093) or abundance (p = 0.989; r² <0.0001). There was an increase in the number of individuals in flowering from November to July, with the lowest number observed in October. This may be related to the drought period, since the lowest rainfall rates occurred from May to September. To verify if these results can be characteriz