Effects of experimental lightgaps and topography on enrichment plantings in a central Amazonian secondary forest
Acta amaz
; 50(3): 192-198, jul. - set. 2020.
Artículo
en Inglés
| LILACS
| ID: biblio-1118817
Biblioteca responsable:
BR6.1
ABSTRACT
Enrichment plantings into secondary forest are an important option in restoring species diversity and ecosystem services. However, little attention has been given to environmental requirements for species performance. This study evaluated the effects of lightgaps and topographic position on the growth and survival of four native tree species (Pouteria caimito, Garcinia macrophylla, Dipteryx odorata and Cynometra bauhiniaefolia) planted into a 26-year old secondary forest originating from abandoned pastures in the central Amazon Basin. Artificial lightgaps and control plots under closed canopy were uniformly distributed on plateaus and bottomlands near water bodies. Seedlings were planted randomly into the plots and monitored for 28 months. Seedling survival rate was high (93%) and did not differ among species. Overall, lightgaps produced a 38% increase in seedling height relative to the controls. Although the four species naturally occur in mature forest, two of the four grew significantly more in lightgaps than in closed canopy secondary forest. Overall, bottomlands facilitated greater seedling growth in height (38%) relative to plateaus, but only one species exhibited a significant increase. This study shows the importance of the environmental variability generated with canopy openings along the topographic gradient, suggesting that both the selection of species and microsite conditions of planting sites have to be considered important criteria in the recovery of degraded areas. (AU)
Texto completo:
Disponible
Colección:
Bases de datos internacionales
Asunto principal:
Cultivos Agrícolas
/
Pastizales
/
Ecosistema Amazónico
/
Restauración y Remediación Ambiental
Idioma:
Inglés
Revista:
Acta amaz
Asunto de la revista:
Ciencia
Año:
2020
Tipo del documento:
Artículo
País de afiliación:
Brasil
/
Estados Unidos
Institución/País de afiliación:
Instituto Nacional de Pesquisas da Amazônia/BR
/
Louisiana State University/US
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