Banca de DEFESA: LUCAS BENEDITO DA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LUCAS BENEDITO DA SILVA
DATE: 31/08/2022
TIME: 14:00
LOCAL: meet.google.com/dkk-sgbn-eaa
TITLE:

Functional traits of riviral and non-riviral environments in the atlantic forest

KEY WORDS:

Functional Diversity, Community Ecology, Soil Fertility, Riparian Forest, Functional Divergence

PAGES: 81
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Conservação da Natureza
SUMMARY:

Functional traits are characteristics classified as morphological, physiological or phenological and that can be measured. These have a strong relationship with ecological processes and the functioning of communities, as well as ecosystems, exposing feedbacks to the environmental state or changing characteristics of the environment. This research aims to analyze the structural behavior of functional traits of tree species in riparian and non-riparian areas of the Atlantic Forest, in order to contribute to a functional ecological approach in different environmental contexts. For this purpose, six functional traits were used: leaf area, leaf thickness, specific leaf area, leaf dry matter content, leaf composition and maximum height; three ecological groups: pioneer, early secondary and late secondary; six soil variables: hydrogenic potential, phosphorus, calcium, magnesium, potassium and aluminum. The Shapiro-Wilk test was applied to assess whether the data meet the statistical assumptions. The functional traits were submitted to a correlation matrix through the Spearman coefficient, then the phenotypic plasticity indexes were calculated for the functional traits between environments. The Friedman and Kruskal-Wallis test was used to verify if there was a difference between the values of the functional traits between environments, ecological groups and soil variables. The analysis of principal components was carried out, which made it possible to carry out analyzes between multiple variables of functional traits, ecological groups and soil variables. Non-metric multidimensional scaling analysis was applied to assess the distribution of nutrient levels between the study areas. The functional diversity calculation was based on the estimators: functional richness, functional evenness, functional divergence and functional dispersion, which compared the ciliary and non-ciliary conserved environments. The functional composition between communities was evaluated through the weighted average of values of the traits at the community level. It was identified that the environments diverge between the functional traits, the traits by ecological groups, between the estimators of functional diversity and also between the levels of nutrients in the soil. The preserved riparian environment showed higher values for morphological functional traits, greater spacing between individuals, greater functional uniformity and homogeneity between the abundance of species. The ciliary context favored plasticity among the functional traits. The non-riparian conserved environment presented high values of functional divergence and functional equitability, competitiveness for the use of resources with high vertical investment and a tendency to group functional strategies. The high abundance of individuals may be influencing the plasticity in this community. The areas diverge between nutrient levels of soil, with low values for all nutrients in the areas. Soil variables alone contribute little to changes in functional traits.

BANKING MEMBERS:
Presidente - 383830 - ANA LICIA PATRIOTA FELICIANO MARANGON
Interna - 3048531 - MARIA DA PENHA MOREIRA GONCALVES
Externo à Instituição - MARILIA ALVES GRUGIKI - UFAL