INIBIOMA   20415
INSTITUTO DE INVESTIGACIONES EN BIODIVERSIDAD Y MEDIOAMBIENTE
Unidad Ejecutora - UE
artículos
Título:
Effect of fire on recruitment of two dominant perennialgrasses with different palatability from semi-arid grasslandsof NW Patagonia (Argentina)
Autor/es:
FRANZESE, J. Y L. GHERMANDI.
Revista:
PLANT ECOLOGY
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2011
ISSN:
1385-0237
Resumen:
Abstract Fire is a non-selective disturbance that
impacts equally plant species that could be selected
differentially by livestock. Post-fire recruitment
dynamics is an important ecological process that has
been barely studied in Patagonian grass species. This
work analyzes the effect of fire on seed germination,
seedling growth, and survival of Pappostipa speciosa
impacts equally plant species that could be selected
differentially by livestock. Post-fire recruitment
dynamics is an important ecological process that has
been barely studied in Patagonian grass species. This
work analyzes the effect of fire on seed germination,
seedling growth, and survival of Pappostipa speciosa
Fire is a non-selective disturbance that
impacts equally plant species that could be selected
differentially by livestock. Post-fire recruitment
dynamics is an important ecological process that has
been barely studied in Patagonian grass species. This
work analyzes the effect of fire on seed germination,
seedling growth, and survival of Pappostipa speciosaPappostipa speciosa
(ex Stipa speciosa) and Festuca pallescens, two
dominant perennial grasses from NW Patagonia that
differ in palatability. We hypothesized that physical
and chemical factors derived from fire differentially
affect recruitment of these species. We performed
experiments in the field and under laboratory and
greenhouse conditions to study the integral effect of
fire and of related abiotic factors (i.e., smoke, heat,
charcoal, and ash) on different phases of recruitment
of both species. Experimental burning promoted P.
speciosa emergence over time, but they did not affect
speciosa emergence over time, but they did not affect
dominant perennial grasses from NW Patagonia that
differ in palatability. We hypothesized that physical
and chemical factors derived from fire differentially
affect recruitment of these species. We performed
experiments in the field and under laboratory and
greenhouse conditions to study the integral effect of
fire and of related abiotic factors (i.e., smoke, heat,
charcoal, and ash) on different phases of recruitment
of both species. Experimental burning promoted P.
speciosa emergence over time, but they did not affect
speciosa emergence over time, but they did not affect
Stipa speciosa) and Festuca pallescens, two
dominant perennial grasses from NW Patagonia that
differ in palatability. We hypothesized that physical
and chemical factors derived from fire differentially
affect recruitment of these species. We performed
experiments in the field and under laboratory and
greenhouse conditions to study the integral effect of
fire and of related abiotic factors (i.e., smoke, heat,
charcoal, and ash) on different phases of recruitment
of both species. Experimental burning promoted P.
speciosa emergence over time, but they did not affect
speciosa emergence over time, but they did not affect
P.
speciosa emergence over time, but they did not affectemergence over time, but they did not affect
F. pallescens total emergence. Experimental burning
decreased P. speciosa seedling growth (i.e., few leaves
and small size), but they did not affect seedling
survival. Smoke from laboratory experiments stimulated
and small size), but they did not affect seedling
survival. Smoke from laboratory experiments stimulated
decreased P. speciosa seedling growth (i.e., few leaves
and small size), but they did not affect seedling
survival. Smoke from laboratory experiments stimulated
and small size), but they did not affect seedling
survival. Smoke from laboratory experiments stimulated
total emergence. Experimental burning
decreased P. speciosa seedling growth (i.e., few leaves
and small size), but they did not affect seedling
survival. Smoke from laboratory experiments stimulated
and small size), but they did not affect seedling
survival. Smoke from laboratory experiments stimulated
P. speciosa seedling growth (i.e., few leaves
and small size), but they did not affect seedling
survival. Smoke from laboratory experiments stimulated
P. speciosa germination. Exposing F. pallescensgermination. Exposing F. pallescens
seeds to 120C decreased germination and seedling
growth. Fire might act as a selective force on
recruitment of both species, as well as changing
competitive interactions during postfire regeneration.
The effect of fire on the recruitment dynamics of the
studied species depended strongly on both intrinsic
species characteristics and meteorological conditions.
growth. Fire might act as a selective force on
recruitment of both species, as well as changing
competitive interactions during postfire regeneration.
The effect of fire on the recruitment dynamics of the
studied species depended strongly on both intrinsic
species characteristics and meteorological conditions.
C decreased germination and seedling
growth. Fire might act as a selective force on
recruitment of both species, as well as changing
competitive interactions during postfire regeneration.
The effect of fire on the recruitment dynamics of the
studied species depended strongly on both intrinsic
species characteristics and meteorological conditions.