Fenologia Reprodutiva De Rubiaceae Juss. Na Mata Atlântica Paraibana

Abstract

Phenological studies help determine the reproductive and vegetative patterns of plants, contributing to knowledge about dynamics in an environment. We studied the reproductive phenological patterns of five Rubiaceae species in an Atlantic Forest area, evaluating their seed dispersal syndromes and the effects of climatic variables on flowering and fruiting phenology. We monitored reproductive individuals of five species biweekly from February 2015 to February 2016 (one-year period). For each reproductive phenophase, we evaluated the Fournier index and intrapopulational synchronicity. Spearman’s rank correlation was used to determine possible correlations between phenological phenophases and rainfall, temperature and photoperiod. Seed dispersal syndromes were based on morphological analysis and Van der Pijl classification. The Rubiaceae community showed a continuous pattern of flowering and fruiting. However, when analysing phenological patterns by species, there was a higher concentration of phenophases and synchronicity of populations in the rainy season. Flowering and fruiting were positively correlated with temperature and historical average rainfall. Zoochory was the predominant seed dispersal syndrome, indicating the importance of the Rubiaceae family as a year-round resource for frugivorous communities. Temperature and rainfall regulate the reproductive phenophases similarly, resulting in a high level of synchrony between them.

Fenologia da Floração à Frutificação da Tocoyena sellowiana (Cham. & Schltdl.) K. Schum.), Ocorrente no Jardim Botânico de São Gonçalo do Amarante

“…ex Schult.) Müll.Arg., encontrou que a intensidade dos frutos maduros dessas espécies ocorreu nos meses em que há as maiores taxas de precipitação (Andrade et al, 2020).…”