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No. de sistema: 000049386

LDR _ _ 00000nab^^22^^^^^za^4500
008 _ _ 100621m20109999mx^br^p^^^^^^z0^^^a0eng^d
040 _ _ a| ECO
c| ECO
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044 _ _ a| mau
245 0 0 a| Effect of fire on the germination of spores of Pteridium caudatum, an invasive fern
520 1 _ a| 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.
650 _ 4 a| Helechos
650 _ 4 a| Pteridium caudatum
650 _ 4 a| Germinación
650 _ 4 a| Esporas
650 _ 4 a| Invasiones biológicas
650 _ 4 a| Incendios
650 _ 4 a| Temperatura del suelo
651 _ 4 a| Reserva Ecológica El Edén, Benito Juárez (Quintana Roo, México)
700 1 _ a| Ramírez Trejo, María del Rosario
700 1 _ a| Pérez García, Blanca
e| coaut.
700 1 _ a| Pérez Salicrup, Diego Rafael
e| coaut.
700 1 _ a| Orozco Segovia, Alma
e| coaut.
773 0 _
t| Journal Tropical Ecology
g| No. 26 (July 2010), p. 457-465
x| 0266-4674
900 _ _ a| En hemeroteca, SIBE-San Cristóbal
902 _ _ a| Nzp/Brenda
904 _ _ a| Agosto 2010
905 _ _ a| Artfrosur
905 _ _ a| Desastres
LNG eng
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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 (autor)
Pérez García, Blanca (autor)
Pérez Salicrup, Diego Rafael (autor)
Orozco Segovia, Alma (autor)
Contenido en: Journal Tropical Ecology. No. 26 (July 2010), p. 457-465. ISSN: 0266-4674
Bibliotecas:
San Cristóbal
No. de sistema: 49386
Tipo: Artículo


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."

SIBE San Cristóbal
Codigo de barra
Estado
Colección
49411-10
(Disponible)
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