Spatial variation in tree demography associated to domestic herbivores and topography: Insights from a seeding and planting experiment
- Renison, Daniel
- Chartier, Marcelo Pablo
- Menghi, Mirta Melva Mercedes
- Marcora, Paula Inés
- Torres, Romina Cecilia
- Giorgis, Melisa Adriana
- Hensen, Isabell
- Cingolani, Ana María
DOIAbstract
Tropical and subtropical high mountains forests are mainly situated within ravines. Two alternative and often confronted explanations have been proposed for this pattern: that abiotic environmental conditions are favourable for tree establishment only within ravines, or that ravines are less affected by grazing and fires which negatively affect establishment in other sites. Here we propose a mixed explanation and hypothesize that abiotic environmental conditions associated to spatial variation are important during early seedling establishment and that grazing is the main determinant during later stages through its negative effect on survival and growth of larger saplings. We sowed 302,400 seeds and planted 360 saplings of the dominant tree ...
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