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2 resultados encontrados para: AUTOR: Ramírez Trejo, María del Rosario
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*En hemeroteca, SIBE-San Cristóbal
Effect of fire on the germination of spores of Pteridium caudatum, an invasive fern
Ramírez Trejo, María del Rosario ; Pérez García, Blanca (coaut.) ; Pérez Salicrup, Diego Rafael (coaut.) ; Orozco Segovia, Alma (coaut.) ;
Contenido en: Journal Tropical Ecology No. 26 (July 2010), p. 457-465 ISSN: 0266-4674
Bibliotecas: San Cristóbal
SIBE San Cristóbal
49411-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-San Cristóbal
Resumen en: Inglés |
Resumen en inglés

Pteridium caudatum is a fern that frequently invades burnt areas in the Yucatán Peninsula and other neotropical sites. While post-fire regeneration of this fern apparently occurs mainly by vegetative means, little is known about the role of its spores in post-fire regeneration and in colonization of newly invaded fields. Central to these questions is whether bracken fern spores maintain their viability after fires. Here we experimentally evaluate the effect of fire-induced temperatures on Pteridium caudatum spore germination. We used 1200-cm3 blocks containing a constant fuel load of 47.4 g of litter, in which we placed spores at three different depths. The blocks were then ignited, and temperatures at each depth were monitored at 1-min intervals for 2 h. One day after the experimental fires, spores were dug out and cultured at 25 °C and 12-h light/dark cycles. Soil temperatures decreased significantly in relation to depth during fires. Spores on the surface were severely affected by fire, while those buried at 1 and 3 cm showed 77% germination. Germination in unburned controls was 86%. Our results suggest that during fires, Pteridium caudatum spores buried a few centimetres below the surface have a high percentage of viability, which could explain the rapid establishment of this species in burnt fields.

Anuario 2003: centros de investigación / Narciso A. Acuña González, editor
Acuña González, Narciso A. (ed.) ;
México : Universidad Autónoma de Campeche, Dirección General de Estudios de Posgrado e Investigación , c2003
Clasificación: CA/001.4097264 / A5
Bibliotecas: San Cristóbal , Tapachula
SIBE San Cristóbal
ECO010007174 (Disponible)
Disponibles para prestamo: 1
SIBE Tapachula
ECO020009657 (Disponible)
Disponibles para prestamo: 1