Sinergias y antagonismos entre servicios ecosistémicos en bosques mixtos bajo manejo silvopastoril en el noroeste de la Patagonia Argentina

CHILLO, MARIA VERONICA; AMOROSO, MARIANO; REZZANO, CARLOS

Congreso; Congreso Latinoamericano IUFRO de Ecología del Paisaje; 2016

Changes in land use affect biodiversity, but our knowledge about the impact of diversity on ecosystem services(ES) is scarce. This relationship is known to be mainly indirect through ecosystem processes, were ES areregulated by multiple processes which can respond in different ways to biodiversity changes. In Argentineannorth-west Patagonia, mixed forests of cordilleran cypress (Austrocedus chilensis) and coihue (Nothofagusdombeyi) with extensive silvopastoral use are characterized by a spatial segregation of sites with high and lowuse intensity. Our objective was to evaluate the effect of silvopastoral use intensity (SUI) on the functionaldiversity of understory vegetation and on different ES, using generalized linear models. Also, we evaluated therelationship between multiple ES under different SUI in order to identify changes in synergies and trade-offs,using pairwise correlations between ES. We found that ES such as soil fertility, forage production and erosionprevention were mainly related to changes in biodiversity, while cultural heritage and accumulated organiccarbon were mainly relate to SUI. We identify synergies between most ES. Only forage production showedtrade-offs with soil fertility and erosion prevention. With increasing SUI, this relationship changed the intensitybut not the direction. The relationship between biodiversity and ES appears as complex and dependent up onthe intensity of land use. At higher SUI, canopy opening promotes increases in biodiversity but not in theprovision of multiple ES. As found in several studies worldwide, an increase in the provision of provisioningES is achieved at the expense of regulating and cultural ES. A heterogeneous distribution of areas of higher SUIwithin the landscape could contribute to sustainable forest management, allowing the maintenance of diversityand the provision of multiple ES.