IANIGLA   20881
INSTITUTO ARGENTINO DE NIVOLOGIA, GLACIOLOGIA Y CIENCIAS AMBIENTALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Edge dynamics in Nothofagus pumilio forests of southern Patagonia as a result of disturbance interactions
Autor/es:
MARCOS RADINS; MARIANO M. AMOROSO; RICARDO VILLALBA; MILAGROS RODRIGUEZ CATÓN
Lugar:
San Rafael - Mendoza
Reunión:
Encuentro; IAI CRN-CRA2047 Documenting, understanding and projecting changes in the hydrological cycle in the American Cordillera - Final Science Meeting; 2014
Institución organizadora:
IAI
Resumen:
p { margin-bottom: 0.25cm; direction: ltr; color: rgb(0, 0, 0); line-height: 120%; }p.western { font-family: "Liberation Serif","Times New Roman",serif; font-size: 12pt; }p.cjk { font-family: "Droid Sans Fallback"; font-size: 12pt; }p.ctl { font-family: "FreeSans","Times New Roman"; font-size: 12pt; } Interactions between forestdisturbances mayincluderecurrence of the same disturbanceagent or one or more differentagents that promote or inhibit subsequent disturbances. At the edges ofpatches recently affected by fires it is common to observe subsequent increases in mortality in unburnt trees due to wind action. Our objective was to document theprogress ofmortality at the edge of recently-burned patchesto study the interactionbetween forest firesand windstormsin the Nothofaguspumilioforests of southernPatagonia,Argentina. Plots were established in 3 recentlyburned patches within which thedistribution of trees in the burnt-unburnt zone (edge) was mappedand the health conditions, tree diameter and increment cores were obtained from all trees. Dendrochronologicaltechniques were used to estimate the year of death and age of all trees.The distribution of individuals in the edge zone was irregular with scattered living and dead treesbut in all cases the edge zone exhibited a progression of mortality into forest not directly affected by the fire as unburnt trees were snapped and uprooted in the direction of the prevailing winds. Mortality patterns showedmarked pulses of varying length since the time of the fire.These retrospectiveand spatialanalyses documentthe dynamics offorest edgesas a result ofthe interaction betweenfires andsubsequent windstorms.
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