Resumo Myrcia (Myrteae, Myrtaceae) é representada por 101 espécies no estado brasileiro do Espírito Santo, contudo, estudos florísticos com este gênero ainda são escassos neste centro de diversidade e endemismo. Neste contexto, um estudo taxonômico de Myrcia na Reserva Natural Vale (RNV), Linhares, Espírito Santo, é aqui apresentado. Quarenta e seis espécies foram registradas neste estudo, compreendendo 46% da riqueza do gênero no Espírito Santo. Vinte e cinco espécies (54%) são endêmicas do domínio atlântico e sete são endêmicas do Espírito Santo. Myrcia scytophylla é registrada na floresta atlântica pela primeira vez e M. cymatophylla, M. congestiflora e M. ferruginosa são novas ocorrências para o estado. A composição de espécie revelada por este estudo difere consideravelmente da publicada por uma listagem anterior. Os representantes de Myrcia podem ser encontrados em todas as principais formações vegetais da RNV e em áreas antrópicas. Este sítio deve ser considerado como prioritário para a conservação de táxons pertencentes a Myrcia devido à presença de uma assembleia rica, incluindo espécies restritas e ameaçadas de extinção.

Abstract Myrcia (Myrteae, Myrtaceae) is represented by 101 species in the Brazilian state of Espírito Santo, but local floristic surveys on this genus still lack in this centre of diversity and endemism. In this context, a taxonomic account of Myrcia in the Vale Natural Reserve (VNR), Linhares, Espírito Santo, is presented. Forty-six species were registered in this study, representing 46% of the richness of the genus in Espírito Santo. Twenty-five species (54%) are endemic to the Atlantic domain and seven are endemic to Espírito Santo. Myrcia scytophylla is reported in the Atlantic forest for the first time and M. cymatophylla, M. congestiflora, and M. ferruginosa are new occurrences in the state. Species composition revealed by this study considerably differs from that of a previous checklist. Representatives of Myrcia can be found in all main vegetation types of the VNR and the anthropic areas. The study site must be considered prioritary for conservation of Myrcia due to the presence of a rich assemblage, which also includes restrict and threatened species.

ABSTRACT There is a knowledge gap regarding the influence of bamboos on natural regeneration. This study evaluated how abundance, richness, dominance, evenness, diversity of the seed bank and biotic and abiotic factors (e.g., canopy opening, herbaceous cover, and litter thickness), differ between bamboo dominated (B) and non-dominated (NB) areas. The study was conducted in a fragment of Semideciduous Seasonal Forest surrounded by an agricultural landscape. Soil samples were taken at 20 points in each area at two time periods, to evaluate the seed bank. The results show that diversity and structural parameters of the seed bank differ between areas and time periods. There was higher abundance and richness of seedlings of herbaceous ruderal species in area B and a greater abundance of seedlings of arboreal species in area NB. Sampling points in the bamboo dominated area had greater canopy openings and greater cover by herbaceous species, facilitating the establishment of individuals belonging to the families Poaceae and Cyperaceae, which could have competitive advantages over other species of the regenerating community. Considering that bamboo can affect the seed bank, long-term studies are needed to understand successional dynamics and evaluate suitable management actions to conserve the diversity in remaining forests.