Tree Regeneration in a Subtropical Humid Forest: Effect of Cultural Disturbance on Seed Production, Dispersal and Germination

Abstract

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Produção de serapilheira em clareiras de uma floresta estacional semidecidual no município de Campinas, SP

“…A contribuição das espécies variou entre clareiras, mas, em geral, houve grande participação de espécies presentes nas áreas de entorno das mesmas e de indivíduos arbóreos e arbustivos remanescentes, o que sem dúvida está refletindo na diversidade da vegetação colonizadora, corroborando estudos sobre a importância da proximidade de fontes de propágulos na colonização de clareiras (Masaki & Nakashizuka 1995, Reader et al 1995, Webb 1998 A abundante floração e frutificação, observadas em algumas árvores e arbustos remanescentes ou presentes em áreas adjacentes às clareiras, devem estar associadas ao aumento na disponibilidade de luz e nutrientes em decorrência do distúrbio (Barik et al 1996).…”

Tropical Rain Forest regeneration in an area degraded by mining in Mato Grosso State, Brazil

“…As most tropical tree species present anemochorous or zoochorous dispersion, the distance from the sources directly influences the quantity of seeds that arrive at the degraded area (Guevara et al, 1986;McClanahan, 1986;Gorchov et al, 1993;Barik et al, 1996;da Silva et al, 1996;Holl, 1999).…”

Efecto de la intervención antrópica en la distribución de las semillas y plántulas del roble (Quercus Humboldtii Bonpl., Fagaceae) en la cordillera Oriental Colombiana

“…En el género Quercus la dispersión primaria se produce cuando las bellotas caen por acción de la gravedad al llegar a la madurez. Un gran porcentaje de éstas no se logra distanciar del árbol parental (con excepción de árboles ubicados en zonas de laderas con cierta pendiente) y por ende sufren una alta mortalidad debido a la acción de los depredadores (Herrera 1995, Barik et al 1996. En contraste, un menor porcentaje de semillas suele ser consumido y dispersado de forma secundaria principalmente por roedores, quienes a pesar de ser depredadores dispersan por olvido las semillas, al enterrarlas en diferentes sitios para comérselas eventualmente en épocas de escasez (Smythe 1970, Pulido 2002, Gómez et al 2008.…”