Efecto del sombreado en vívero en el crecimiento y mortalidad de plántulas

Abstract

RESUMEN 1 Investigación desarrollada en el marco del proyecto "Tecnología de la madera y bases silviculturales para el manejo y conservación del palosangre (Brosimum rubescens Taub.) en el sur del trapecio amazónico", cofinanciado por SENA-COLCIENCIAS-UNIVERSIDAD DISTRITAL, con

Intra annual seed production and availability of two morphotypes of Brosimum rubescens taubert in forests of the Colombian Amazon

“…Brosimum rubescens Taubert is a species from the Moraceae family (Berg 1972, Berg & Simonis 2000 distributed in the tropical rain forests from America, being the Amazonia its center of dispersion, where it has been reported in terra firme forests (Duivenvoorden & Lips 1993, Urrego 1997, Sá nchez 1997, Ló pez & Cá rdenas 2002, Duque et al 2003, Rudas & Prieto 2005, Palacios 2005, Parrado-Roselli 2005, Rivera et al 2006, Peñ uela & Pijache 2007. Adult trees reach the main canopy, with maximum heights of 30 -35 m and up to 90 cm of diameter.…”

“…Adult trees reach the main canopy, with maximum heights of 30 -35 m and up to 90 cm of diameter. It is considered as a shade-tolerant and long-lived species, typical of primary forests (Marimon & Felfili 2001, Palacios 2005, Rivera et al 2006). According to results from 14 to 18 years of growth data in permanent plots, the life cycle of this species could be between 450 -700 years (Laurance et al 2004), though recent studies based on radio carbon would support the higher limit (Vieira et al 2011).…”

“…The germination is hypogeous and occurs in few days (usually within 15-20 days) because seeds are recalcitrant. Seedlings are abundant in the understory of terra firme forests, especially under the crown of maternal trees (Palacios 2005, Rivera et al 2006.…”

“…However, timing of peaks of maximum production of ripe fruits and seeds were different (Figures 4e and 4f). This phenological pattern would reduce competition between them and would enhance fruiting and seed dispersion at the beginning of the rainy season, when germination of B. rubescens would be favored, given the recalcitrant condition of their seeds, as well as growth and survival of seedlings (Rivera et al 2006).…”

“…These morphotypes coexist in Terra firme forests of the Colombian Amazon. The species is a long-lived, shade tolerant, generalist species,which inhabits different landscapes over well-drained soils of the Amazonia (Marimon & Felfili 2001, Duque et al 2003, Palacios 2005, Rivera et al 2006. These two morphotypes, locally named Palosangre negro (Black palosangre-BP) and Palosangre blanco (White palosangre-WP) differ mainly in their foliar structures but are similar in terms of size, weight, shape and color of fruits and seeds (Palacios 2005).…”