| dc.description.abstract | The aims of this work were to analyze the spatial distribution of the most abundant
botanical families in the area of Araucaria Forest and its relations with the
Araucariaceae, in the National Forest of São Francisco de Paula, RS. For this
purpose, the spatial position of the trees measured in the Forest Inventory carried out
in a 1 ha plot (100 x 100 m) in the years of 2001 and 2017 was used, by the Ripley K
function and geostatistics. The spatial distribution of the Aquifoliaceae,
Euphorbiaceae, Lauraceae, Myrtaceae and Sapindaceae was aggregated and of the
Araucariaceae and Flacourtiaceae the completely random pattern predominated in
the two dates analyzed. Araucariaceae have been shown to have an associated
spatial distribution with the botanical families Aquifoliaceae, Lauraceae and
Myrtaceae (from approximately 20m), while the pattern of complete spatial
independence was observed with the families Euphorbiaceae, Flacourtiaceae and
Sapindaceae. Geostatistics, reflected the association pattern of the bivariate point
process for the relationship between the Araucariaceae and the Aquifoliaceae and
between the Araucariaceae and the Lauraceae, in the two dates studied. The same
behavior of the bivariate point process was not observed for the relation of
Araucariaceae and Myrtaceae. Araucariaceae and Flacourtiaceae obtained
satisfactory variographic adjustment in the study years, disagreeing with the marked
point process of complete spatial independence at most of the analysis distances.
Araucariaceae and Euphorbiaceae had good variographic adjustment for the year
2001 and low quality in 2017, while the relationship between Araucariaceae and
Sapindaceae, given by the labor variable did not allow to find stability in the
semivariance in the years of study. It was observed that only 30.47% of the plot did
not suffer alterations in the spatial distribution of the individuals of the botanical
families studied between the years of study. The removal of trees modified to a
greater degree the relationship between the Araucariaceae and the families
Aquifoliaceae, Euphorbiaceae, Flacourtiaceae and Myrtaceae, while the entry of
trees produced greater changes in the relationship between Araucariaceae and
Lauraceae and between Araucariaceae and Sapindaceae. | |
