Composition and structure of the bryophyte community of Park Savanna in Marajó Island, Pará, Brazil

Abstract

Aiming to enrich the knowledge about the flora of savannas, this paper studied the composition and structure of the bryophyte community of Park Savanna areas in Marajó Island -PA. Biological material was collected within 60 100-m 2 plots equally distributed in the dry season of 2016 and the rainy season of 2017 in five Park Savanna areas (SP-I to SP-V). The composition, density, richness and diversity of species and presence of indicator species were compared between the sampled areas and seasons.The species were classified according to the substrates colonized and ecological groups of light tolerance. Significant differences in SP-V indicated that the area was the main factor influencing the composition of bryophytes (p: 0.0001), with five indicator species.There were also significant differences in density (p = 0.0001168) and richness (p = 0.0001317) of bryophytes between seasons (p-value = 0.3393; p-value = 0.04065; p: 0.1081).There was a predominance of generalist (25 spp.) and corticolous (728 individuals) species, which were widely distributed in the sampled areas. Therefore, the structure of the bryophyte communities was not influenced by seasonality, and this indicates that these plants are adapted to the environmental conditions.

Estado Da Arte Do Conhecimento Sobre as Briófitas No Maranhão, Brasil

“…Isso se faz importante, principalmente, nos dias atuais, onde ações antrópicas devido a exploração excessiva dos recursos naturais vêm causando impactos e danos expressivos muitas vezes irreversíveis para a natureza/meio ambiente, agindo diretamente sobre às espécies nativas de briófitas e as colocando em risco de extinção (Amelio; Sousa;Valente, 2021;Gomes et al, 2021;Pereira et al, 2021). Assim, cabe salientar que essas considerações são de extrema importância conhecer, haja vista a necessidade da preservação da flora e do meio ambiente, cabendo, portanto, informar também, a população sobre os riscos que a flora de briófitas sofre com a ação humana (Amelio; Sousa;Valente, 2021).…”

Bryophytes in Amazon savannas: richness and composition in disjunct areas in the Eastern Amazon

“…Another study on bryophytes from savannas in Marajó Island registered 41 species, among 15 mosses and 26 liverworts distributed in 21 genera and in eight families (Gomes et al 2021). According to the authors, the evaluated communities are formed by typical species of this type of ecosystem, tolerant to environmental stress, which are not influenced by seasonality and remain in the environment.…”