INVESTIGADORES
RENISON Daniel
artículos
Título:
Post-fire recovery occurs overwhelmingly by resprouting in the Chaco Serrano forest of Central Argentina.
Autor/es:
TORRES, R. C; GIORGIS, M. A.; TRILLO, C.; VOLKMANN, L.; DEMAIO, P.; HEREDIA, J.; RENISON, D.
Revista:
AUSTRAL ECOLOGY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2014 vol. 39 p. 346 - 354
ISSN:
1442-9985
Resumen:
In fire-prone landscapes, differences in post-fire regeneration by resprouting between species or sites
could be far more important in explaining vegetation physiognomy and composition than seed regeneration. This
is the first study exploring the relative contribution of tree resprouts and seeds to post-fire crown volume in the
Chaco Serrano forest of South America. Additionally, we compare the resprouting response among species and
quantify post-fire changes in tree composition among sites.We established 290 permanent plots distributed in three
sites affected by wildfires in 2005. For all tree species in all plots we recorded survival of every individual 1 year after
the fire; at the plot level, we recorded the above-ground tree volume before and 3 years after the fire. Resprouting
from the base was the main resprouting type. Survival varied between species from 73% to 100% for native species
and from 7% to 100% for non-natives. Before the fire, crown volume was similar in the three sites, and was
completely lost after the fire in 92% of the plots.Three years after the fire, between 8% and 58% of crown volume
was recovered. The ratio of crown recovery because of resprouts and seedlings was 1562:1. Tree composition
exhibited few changes because of the high post-fire survival of most native species.We conclude that in the semiarid
Chaco Serrano ecosystem tree species regenerate mainly by resprouting. This regeneration mode should be taken
into account to better understand post-fire successional pathways of these forests, their management and the
restoration of burnt forest areas.