Abstract
ABSTRACT This work evaluated the soil and climate influence in the floristic composition of the lower stratum in a floodplain forest in the environmental protection area of Combu Island, in Belém, Pará. From February to April (high rainy period) and from May to July (less rainy period), all individuals with height ≤ 1 m were sampled and identified in four plots of 20 x 20 m divided into subplots of 1 m2. A sample of soil per plot was collected at the depth of 20 cm in the months of April and July. The relationship between floristic with edaphic and climatic conditions was evaluated by a canonical correspondence analysis (CCA). The floristic composition between the two studied periods was similar. Differently, the physico-chemical soil composition showed variation between the two periods. The CCA indicated a significant correlation between the distribution of species and edaphic factors, although most species were not influenced by soil variables, in particular the most abundant ones. Some species showed a relationship with In and fine sand, indicating the existence of preferential sites for some species.
Highlights
The floodplain forest is commonly known estuary by “lowland forest” in the Amazon
The hydrological cycle associated to sedimentation, ensures the maintenance of biodiversity and shape a dynamic environment with a mosaic of communities (WITTMANN; JUNK, 2003; FERREIRA et al, 2005; 2013)
The four families who have excelled in number of species in the two periods were well represented in other surveys which investigated the floristic composition in floodplain forest (ALMEIDA et al, 2004; ALMEIDA; JARDIM, 2011; LAU; JARDIM, 2013), evidencing the constant frequency of Fabaceae (WITTMANN et al, 2006; 2013; LUIZE et al, 2015)
Summary
According to Abreu et al (2014), it is related to white water rivers that are under daily cycles of flooding and receding waters, represented by the tides. It presents alluvial soils, resulting from sedimentation of suspended particles from the waters of the rivers (SANTOS et al, 2004; LOPES et al, 2006). In this ecosystem, the hydrological cycle associated to sedimentation, ensures the maintenance of biodiversity and shape a dynamic environment with a mosaic of communities (WITTMANN; JUNK, 2003; FERREIRA et al, 2005; 2013). It is assumed that floristic variation occur due to aleatory or biological processes related to the dispersal process and ecological relations, such as competition, herbivory and predation (FERREIRA et al, 2010; MOSQUERA; HURTADO, 2014; HIGUCHI et al, 2015)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
