Staggemeier, Vanessa GrazieleFerreira, Maria Luiza de Souza2025-12-172025-12-172025-12-08FERREIRA, Maria Luiza de Souza. Fenologia reprodutiva de espécies da família Rubiaceae na Floresta Nacional de Nísia Floresta/RN. Orientadora: Vanessa Graziele Staggemeier. 2025. 50 f. Monografia (Graduação em Ecologia) – Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, 2025.https://repositorio.ufrn.br/handle/123456789/67145Phenology studies repetitive biological events, such as flowering and fruiting, and is crucial for understanding the timing and intensity with which resources like leaves, flowers, fruits, and seeds will be available to fauna. The Atlantic Forest, one of the most biodiverse and also one of the most threatened biomes in the world, has not yet been sufficiently explored in this aspect, especially in areas of northeastern Brazil, where seasonal variations in climate are less pronounced than in the southern part of the biome. This study seeks to investigate how environmental factors (day length, radiation, humidity, temperature, and precipitation) influence the reproductive cycles of plants in this biome. The Rubiaceae family was used as a study model due to its high diversity in the biome and the presence of species that stand out in abundance. Seven species and 324 individuals were sampled fortnightly for 12 months (August 2022 to July 2023) in the Nísia Floresta National Forest, located 40 km from the capital of Rio Grande do Norte. This forest is one of the last remnants in the far north of the biome. Considering the hypothesis that the reproductive phenology (anthesis and fruiting) of species of the Rubiaceae family is significantly influenced by seasonal environmental factors (day length, radiation, humidity, temperature, and precipitation), it was found that flowering showed strong seasonality and synchrony in this assemblage, concentrating in the period of highest temperature and precipitation (December to March), and fruiting occurred more continuously, although with a peak shortly after flowering (January to March). The main trigger for flowering was day length, which showed a significant correlation with the onset of reproductive phenophases, and, for fruiting, radiation was the negative factor, indicating that the availability of fruit increases on days with less solar radiation. These patterns differ from those already described for the south of the biome by revealing that temperature is the most important environmental factor, surpassing the influence of precipitation and day length, which suggests a local adaptation to the less seasonal climatic conditions of the Northeast. This study fills important gaps in knowledge about phenology in the far north of the Atlantic Forest, and the summarized information on the phenology of each species is valuable for improving environmental management and conservation strategies at the regional scale.pt-BRAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/BiodiversidadeSazonalidadeFloraçãoFrutificaçãoMata AtlânticaBiodiversitySeasonalityFloweringFruitingAtlantic ForestbachelorThesisCIENCIAS BIOLOGICAS::ECOLOGIA