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portuguesFoi caracterizada a demografia e o padrao espacial de uma populacao de erva-mate (Ilex paraguariensis A.St.-Hil) abrangendo areas em diferentes historicos de uso (presenca e ausencia de gado), em Floresta com Araucarias. A coleta de dados foi realizada em tres ha, metade em cada area. Foi avaliada a frequencia de individuos por classe de altura, padrao de distribuicao espacial, distribuicao diametrica (para individuos reprodutivos) e razao sexual. O padrao ”J” invertido foi predominante, sendo exclusivo para area com presenca de gado, local que apresentou uma menor densidade de individuos. O padrao de distribuicao espacial predominante foi o agregado, sendo que os individuos reprodutivos possuem preferencialmente padrao aleatorio nas menores distâncias. Os resultados indicam que a presenca do gado altera a densidade de I. paraguariensis e a proporcao de individuos nas classes demograficas avaliadas. EnglishThis study characterized the demography and spatial pattern of a yerba mate (Ilex paraguariensis A.St.-Hil) population covering areas with different use histories (Presence and Absence of Cattle) in a Araucaria Forest. Data collection was performed in three ha, half in each area. The frequency of individuals by height, spatial distribution pattern, diameter distribution (for reproductive individuals) and sexual ratio were evaluated. An inverted “J” pattern predominated, being exclusive to an area with Cattle Presence, a place which presented a lower density of individuals. The predominant spatial distribution pattern was aggregated, and the reproductive individuals have a preferentially random pattern at the shortest distances. Results indicated that cattle presence changes the density of I. paraguariensis individuals and the proportion of individuals in the evaluated demographic classes.

Cattle influence on the population structure of yerba mate (Ilex paraguariensis) in Araucaria Forest