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Revista Chapingo serie ciencias forestales y del ambiente

versión On-line ISSN 2007-4018versión impresa ISSN 2007-3828

Resumen

CUYCKENS, Griet An Erica et al. Effect of livestock on regeneration of queñoa (Polylepis australis Bitt.) forest in the Southern Andean Yungas of northwestern Argentina. Rev. Chapingo ser. cienc. for. ambient [online]. 2021, vol.27, n.2, pp.215-228.  Epub 26-Ene-2024. ISSN 2007-4018.  https://doi.org/10.5154/r.rchscfa.2020.05.035.

Introduction:

Polylepis forest is an ecosystem stated with conservation priority and threatened by anthropogenic effects; extensive livestock is one of the most frequent disturbances in this forest.

Objective:

To study the effect of livestock on the early stages of regeneration of a queñoa (Polylepis australis Bitt.) forest.

Materials and methods:

Within a pure forest of P. australis at Parque Provincial Potrero de Yala, Jujuy, Argentina, densities of seedlings (˂1 year) and saplings (˃1 year and ˂30 cm) were measured in the presence (0.23 heads∙ha-1) and absence of livestock, for a year. Linear mixed models (normal distribution) were adjusted for density of seedlings and saplings. Data was analyzed with a Chi-square test (χ2).

Results and discussion:

Presence of livestock had no impact on seedling density, but significantly decreased density of saplings (P < 0.001); in areas without livestock (10.58 ± 6.64 individuals∙m-2) was three times higher than with presence of livestock (3.17 ± 3.86 individuals∙m-2). Difference in density of seedlings and saplings was significantly (P < 0.001) over the years. This indicates that there is potential for natural regeneration, but livestock would affect stages after seedling emergence, representing a threat to the forest.

Conclusion:

This study provides important information for livestock management in mountain forests of P. australis. A long-term study of the effect of livestock on seedling and sapling density, and over the entire distribution range, is needed.

Palabras llave : restoration; seedling emergence; saplings; anthropic effect; extensive livestock.

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