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Recovery of Pilgerodendron uviferum (D. Don) Florin forest after antropogenic disturbance in the Valdivian Costal Range, Chile 73
SZEJNER,PAUL; LE QUESNE,CARLOS; GONZÁLEZ,MAURO E; CHRISTIE,DUNCAN A.
The loss and decline of one ecosystem can be triggered by continuous changes in structure made by frequent and/or severe disturbances. Therefore we quantify the structural losses and the posteriori recovery after man-made disturbances of two fragments of P. uviferum in the Reserva Nacional Valdivia (RNV; 40°S) by studying the evidence of human disturbance and forest structure. Our results indicate frequent burned trees and stumps, indicating that slash and burn are the main factor shaping the present structure of these forest fragments. In both cases 86% of the basal area was represented by dead tress, and 14% of basal area by living individuals. The results show a severe past disturbance and the recovery of those P. uviferum forests by the abundant...
Tipo: Journal article Palavras-chave: Ciprés de las Guaitecas; Alerce; Deforestation; Natural regeneration; Southern flora; Cordillera de la Costa.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432011000200010
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Spatial distribution and regeneration strategies of the main forest species on Robinson Crusoe Island 97
VARGAS,RODRIGO; CUEVAS,JAIME G; LE QUESNE,CARLOS; REIF,ALBERT; BANNISTER,JAN.
We describe the structure of the endemic Robinson Crusoe Island forest. We analyse the regeneration strategies of the trees: Myrceugenia fernandeziana, Fagara mayu, and Drimys confertifolia. Inventories were taken on nearly intact montane forest remnants with emphasis on spatial patterns by using Ripley's K (t) function. We hypothesized that i) ornithochorous and barochorous species should show a clumped regeneration, as a consequence of seed rain; ii) nurse effect, if present, should also contribute to a clustered pattern; iii) clustering should disappear at more developed life-stages due to self-thinning; iv) if gaps influence tree mortality and regeneration, these will present grouped patterns. Myrceugenia fernandeziana was the most abundant tree...
Tipo: Journal article Palavras-chave: Forest regeneration; Juan Fernández Islands; Myrtisylva; Ripley's K-function; Spatial point pattern analysis.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2010000300003
Registros recuperados: 2
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