Changes in forest structure values along the natural cycle and different management strategies in Nothofagus antarctica forests
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Changes in forest structure values along the natural cycle and different management strategies in Nothofagus antarctica forests. / Martínez Pastur, Guillermo J.; Rosas, Yamina M.; Chaves, Jimena; Cellini, Juan M.; Barrera, Marcelo D.; Favoretti, Santiago; Lencinas, María V.; Peri, Pablo L.
In: Forest Ecology and Management, Vol. 486, 118973, 2021.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Changes in forest structure values along the natural cycle and different management strategies in Nothofagus antarctica forests
AU - Martínez Pastur, Guillermo J.
AU - Rosas, Yamina M.
AU - Chaves, Jimena
AU - Cellini, Juan M.
AU - Barrera, Marcelo D.
AU - Favoretti, Santiago
AU - Lencinas, María V.
AU - Peri, Pablo L.
N1 - Funding Information: To the researchers, technicians, students and ownerships (ranch and sawmill companies) that support this research in the long-term. It was impossible to obtain these invaluable data without their disinterested and unconditional help. This research was conducted with funds provided by PICT2016-1968 ANPCyT-Argentina (Monitoreo y evaluación de plantas vasculares, artrópodos y aves en ambientes de Patagonia Sur para la identificación de bioindicadores de actividades agroforestales y el desarrollo de estrategias de conservación), and PUE2016 CONICET-Argentina (Sinergias y conflictos entre las actividades económicas y los socio-ecosistemas de Tierra del Fuego: Mantenimiento de la productividad y los servicios ecosistémicos en el largo plazo). Publisher Copyright: © 2021 Elsevier B.V.
PY - 2021
Y1 - 2021
N2 - Ecologically sustainable forest management aims to preserve ecosystem integrity by providing wood and non-wood values. For this, it is necessary to determine the losses produced by the different management practices in natural forest resilience. The aim was to determine changes in forest structure values along the natural cycle and human impacts generated by rural timber, pastoral and silvopastoral uses in managed, unmanaged, and transformed Nothofagus antarctica forests of Tierra del Fuego (Argentina), as well as in some associated environments (grasslands). We sampled 145 sites to determine landscape characterization, microclimate, soil properties, debris, forest structure and regeneration under different conditions: (i) six phases of natural forest dynamic (even-and uneven-aged), (ii) four types of management and conversion alternatives with and without natural regeneration, and (iii) forest edges and grasslands. Main results showed that stand characteristics (abiotic, soil, forest structure, and regeneration) did not significantly change along the different natural forest phases in even- and uneven-aged structures. However, many studied variables strongly varied depending on harvesting intensities and fire occurrence. The magnitude of these changes was directly related to the impact degree. Multivariate analyses showed a close relationship among the different natural forest phases, and how stands with harvesting or different conversion intensity differ from the control stands, or how much they become similar to openlands. Through different indexes, we related the modifications of the stand characteristics with the magnitude and direction of the changes. Then, these could be used to propose sustainable forest management strategies in the framework of silvopastoral systems.
AB - Ecologically sustainable forest management aims to preserve ecosystem integrity by providing wood and non-wood values. For this, it is necessary to determine the losses produced by the different management practices in natural forest resilience. The aim was to determine changes in forest structure values along the natural cycle and human impacts generated by rural timber, pastoral and silvopastoral uses in managed, unmanaged, and transformed Nothofagus antarctica forests of Tierra del Fuego (Argentina), as well as in some associated environments (grasslands). We sampled 145 sites to determine landscape characterization, microclimate, soil properties, debris, forest structure and regeneration under different conditions: (i) six phases of natural forest dynamic (even-and uneven-aged), (ii) four types of management and conversion alternatives with and without natural regeneration, and (iii) forest edges and grasslands. Main results showed that stand characteristics (abiotic, soil, forest structure, and regeneration) did not significantly change along the different natural forest phases in even- and uneven-aged structures. However, many studied variables strongly varied depending on harvesting intensities and fire occurrence. The magnitude of these changes was directly related to the impact degree. Multivariate analyses showed a close relationship among the different natural forest phases, and how stands with harvesting or different conversion intensity differ from the control stands, or how much they become similar to openlands. Through different indexes, we related the modifications of the stand characteristics with the magnitude and direction of the changes. Then, these could be used to propose sustainable forest management strategies in the framework of silvopastoral systems.
KW - Forest resilience
KW - Patagonia
KW - Regeneration dynamics
KW - Sustainable management
KW - Uneven-aged and even-aged forests
U2 - 10.1016/j.foreco.2021.118973
DO - 10.1016/j.foreco.2021.118973
M3 - Journal article
AN - SCOPUS:85100456247
VL - 486
JO - Forest Ecology and Management
JF - Forest Ecology and Management
SN - 0378-1127
M1 - 118973
ER -
ID: 339247793