Phytoclimatic characterization and cartography of subantarctic native forests in Isla Grande de Tierra del Fuego (Patagonia, Argentina)

  • C. Allué Junta de Castilla y León. Consejería de Medio Ambiente
  • J. A. Arranz Junta de Castilla y León. Consejería de Medio Ambiente
  • J. O. Bava Centro de Investigación y Extensión Forestal Andino Patagónico
  • J. M. Beneitez Sociedad Pública de Medio Ambiente. Castilla y León
  • L. Collado Dirección General de Bosques. Ushuaia (Argentina)
  • J. M. García-López Junta de Castilla y León. Consejería de Medio Ambiente
Keywords: Phytoclimatology, convex hull, modelling, Nothofagus, beech, steppe

Abstract

Isla Grande de Tierra del Fuego is especially peculiar in phytoclimatic terms, situated as it is at an extreme southerly latitude, surrounded by large water masses and close to the great mass of Antarctic ice. Its main peculiarities in this sense are the coolness of its summers and a very narrow temperature range. As a result, the woodland landscapes in the parts with forest cover are dominated by microphyllous broadleaf physiognomies, both evergreen and deciduous, of the Nothofagus genus. This paper reports a more in-depth investigation of the hitherto little-known phytoclimatic conditions in that territory which included calibration and validation of a model of phytoclimatic suitability that addresses the principal plant physiognomic units and phytoclimatic mapping. It discusses the causes behind the presence of broadleaf formations in thermal conditions which in the northern hemisphere would allow only coniferous formations or no tree formations at all, and also the edaphic peculiarities that may explain the presence of a evergreen species like Nothofagus betuloides in subantarctic mixed forests.

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Published
2010-07-29
How to Cite
AlluéC., ArranzJ. A., BavaJ. O., BeneitezJ. M., ColladoL., & García-LópezJ. M. (2010). Phytoclimatic characterization and cartography of subantarctic native forests in Isla Grande de Tierra del Fuego (Patagonia, Argentina). Forest Systems, 19(2), 189-207. https://doi.org/10.5424/fs/2010192-01314
Section
Research Articles