Dissertação
Estudo de comunidades vegetais campestres na região do Alto Camaquã, Rio Grande do Sul
Fecha
2012-03-02Registro en:
BOAVISTA, Lidiane da Rosa. Grassland communities evaluation at Alto Camaquã,
Rio Grande do Sul. 2012. 84 f. Dissertação (Mestrado em Ciências Biológicas) - Universidade Federal de Santa Maria, Santa Maria, 2012.
Autor
Boavista, Lidiane da Rosa
Institución
Resumen
Understanding the dynamics of vegetation could facilitate decision making and
adoption of new management practices, seeking a better use of available resources in areas of
natural grassland. This study aimed to evaluate the dynamics of a natural grassland vegetation
subject to grazing and fertilization, in four different locations in the counties of Pinheiro
Machado and Piratini, located in the upper basin region of Rio Camaquã. The treatments were
a combination of the above factors. The estimation of species composition and biomass
followed BOTANAL field method procedures, with some adjustments. There was a change in
vegetation dynamics in the treatments as a response of the interaction of evaluation period,
fertilization and grazing, showing a divergence of the trajectories of vegetation and there is no
clear distinction of functional types. There was not a clear association between the functional
types and environmental variables. The diversity and evenness of species were quantified
using the Shannon and equitability indexes. There were no significant differences between
different fertilization, but for grazing, there was a significant difference between the
evaluation periods. Areas subjected to controlled grazing, show a tendency to increase the
diversity of species compared to areas subjected to continuous grazing. The use of controlled
grazing had a positive influence on species diversity.