INVESTIGADORES
MARTINEZ PASTUR Guillermo Jose
congresos y reuniones científicas
Título:
Landscape variable effects on active restoration strategies to restore Nothofagus forests degraded by invasive beavers in Tierra del Fuego.
Autor/es:
JM CELLINI; G MARTÍNEZ PASTUR; R SOLER ESTEBAN; J HENN; CB ANDERSON
Lugar:
Tartu
Reunión:
Conferencia; IUFRO Landscape Ecology Conference; 2015
Institución organizadora:
Tartu University
Resumen:
An agreement between Argentina and Chile to eradicate invasive species was signed due to low resilience of Patagonian forests to the impacts generated by beavers (Castor canadensis). Passive restoration was ineffective, necessitating active strategies. Plantations in abandoned ponds were made with Nothofagus pumilio (lenga) and N. antarctica (ñire). We analyzed the influence of biotic and abiotic factors in 3 micro-habitats: front and tail of ponds and cut not-flooded areas. Five-years-old lenga seedlings had 39% survival in front, 21% in tails and 46% in cut areas at year-3, being negatively influenced by plant cover and soil moisture. Lower height growth were recorded during year-1 (0.7-0.9 cm/year), but increased with time (1.9 cm/year front, 1.6 cm/year tail, 4.3 cm/year cut areas). At 4 locations across bioclimatic zones, 10-40 cm ñire plants attained 17% survival in meadows (front and tail) and 30% in cut areas, being higher in larger plants (25% vs. 18%) influenced by rainfall (4% in sites 400 mm/year). The main damage was from above-ground biomass dryness, but root survival allowed the emergence of new shoots. It is necessary monitoring different Nothofagus species in environments across landscape to determine feasibility and effectiveness of restoration plans.