Functional Characterisation of an Anthropised Atlantic Forest Fragment

Abstract

The present study aimed to evaluate the functional expression of tree sinusiae in three sectors of a forest fragment in relation to different land use histories. The study recorded the number of individuals, number of individuals with multiple stems and number of tillers, calculated the percentages of tillered individuals and species, and then classified the species into regeneration and dispersal guilds. The most anthropised sector of the forest showed higher tillering and a larger proportion of pioneer and light-demanding climax species. The sector with moderate anthropisation presented intermediate tillering and mixed occurrence of light-demanding and shade-tolerant guilds. The non-anthropised sector showed lower tillering and a higher number of shade-tolerant species. The distribution of zoochorous individuals was not significant. In conclusion, the different levels of anthropisation provided distinct patterns of tillering and different compositions in regeneration guilds, highlighting their influence on the ecology of tropical forests.

Landscape and Vegetation Changes to Areas of Savanna Submitted to Different Fire Intervals in Parque Nacional dos Sempre Vivas, Brazil

“…Fire interval is an important factor for savannic areas because it determines processes such as sowing, germination, fruiting and flowering [18]. Thus, it is concluded here that the vegetation in Area 1 is still in the process of regeneration and Area 2 is stabilized, suggesting a community formed by species of rapid regeneration and therefore resistant to fire.…”

“…Phytosociological analysis comprised two fundamental stages. The analytical stage integrates sample design, collection of plant material and identification of species, while the synthetic stage culminates with the comparison of data among sample units for classification [18]. It is in this stage that the identification and classification of floristics was carried out in the four study areas.…”

Population structure of understory, canopy/emergent tree species in Brazilian Atlantic Forest remnants with different Conservation status

“…Campomanesia xanthocarpa was less abundant in both areas, but the aggregate distribution in Logged Forest was also due to the higher density of individuals in the smaller size classes. A higher degree of aggregation in smaller individuals is common for tropical tree species (Condit et al, 2000;Fonseca et al, 2004;Morel et al, 2018). Condit et al, (2000) found that the aggregation of juveniles suggests habitat-related patchiness or dispersal limitation.…”

Dinâmica do componente arbóreo em função da distância da borda em uma floresta com araucária no Planalto Sul Catarinense, Brasil

“…Para verificar a composição das guildas de regeneração das populações de cada setor (borda e interior), as espécies foram classificadas em: pioneiras (P), cujos indivíduos necessitam de luz direta para germinar e se estabelecer, clímax exigente de luz (CEL), que precisam de luz quando jovens para atingir o dossel, e clímax tolerante à sombra (CTS), que são as espécies cujas sementes germinam e crescem sob a sombra, em condições de sub-bosque. Essa classificação foi feita a partir da metodologia usada por Morel et al (2018).…”