CADIC   02618
CENTRO AUSTRAL DE INVESTIGACIONES CIENTIFICAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Potential biodiversity of understory plants in Nothofagus forests: Representativeness inside the protected areas
Autor/es:
G MARTÍNEZ PASTUR; PL PERI; YM ROSAS
Lugar:
Bucarest
Reunión:
Conferencia; International Scientific Conference Forest Science for a Sustainable Forestry and Human Wellbeing in a Changing World; 2018
Institución organizadora:
National Institute for Research and Development in Forestry
Resumen:
Plant biodiversity of Nothofagus forests varied according environmental gradients and the different forest types. Maps of potential biodiversity (MPB) allowed to understand the potential distribution, representing a useful tool in the decision making. The objective was to elaborate a MPB based on understory plants using potential habitat suitability (PHS) of indicator species in Santa Cruz (Argentina), describing their marginality and specialization. Also: (i) characterize environmental gradients and forest types where species occurred, and (ii) analyse their representativeness inside the protected areas. We worked with 11 species with highest occurrence-frequency index, and obtained PHS maps using ENFA analysis with Biomapper 4.0. We used 42 grids of 90x90 m with climatic, topographic and landscape variables. Also, DCA analyses with a longitude gradient and forest types, and GIS analyses considering protected areas and MPB. ENFA used mean temperature and precipitation, elevation, NDVI and distance to rivers. Marginality and specialization indexes determine three plant groups, which were coincident with DCA analyses: (i) one related to evergreen forests in mountain areas (e.g. Blechnum penna-marina), (ii) one related to N. pumilio forests in central area (e.g. Viola magellanica), and (iii) one related to N. antarctica forests near steppe (e.g. Festuca magellanica). Representativeness analyses showed that first two groups were greatly protected inside the natural reserves, however, the better habitats for some of the studied plants occurred outside the reserves. New conservation strategies must include N. antarctica forests and new areas with higher MPB values, or developed off-reserve conservation proposals.