Anthropogenic Impacts Allowed for the Invasion of Understory Species, Affecting the Sustainability of Management Practices in Southern Patagonia

• Autores: Rosas, Yamina Micaela; Peri, Pablo Luis; Cellini, Juan Manuel; Lencinas, María Vanessa; Kepfer-Rojas, Sebastian; Kappel Schmidt, Inger; Pechar, Sebastián; Barrera, Marcelo Daniel; Martínez Pastur, Guillermo José
• Año de publicación: 2024
• Idioma: inglés
• Tipo de recurso: artículo
• Fuente: Land 13 : 102 (January 2024)
• Materia: Primary Forests; Resilience; Invasive Species; Land Use; Silvopastoral Systems; Harvesting; Extensive Husbandry; Fires; Resource Conservation; Pastures; Bosques Primarios; Resiliencia; Especie Invasiva; Utilización de la Tierra; Sistemas Silvopascícolas; Cosecha; Ganadería Extensiva; Incendios; Conservación de los Recursos; Nothofagus; Pastizales; Tierra del Fuego; Sistemas Silvopastoriles; Región Patagónica; Manejo de Paisajes; Impacto Humano; Nothofagus antarctica; Managed Landscapes; Human Impacts
• Institución: Instituto Nacional de Tecnología Agropecuaria

Forest management aims to preserve integrity and ecosystem resilience. Conservation and species invasion patterns must be determined in managed landscapes. The objectives of this study were to identify proxies that allowed plant species invasion (natives and exotics) and define thresholds of human impacts to improve management. We also wanted to identify indicator species for different impacts and environments. A total of 165 plots were measured in Nothofagus antarctica forests and associated open lands (dry and wet grasslands) in Tierra del Fuego (Argentina). We found differences in the studied variables across the landscape and among different uses and impacts. Human impacts influence land types, emphasizing the importance of managing intensities. Indicator plant species allowed for the identification of potential ecological thresholds related to human impacts and the establishment of species linked to ecological and economic degradation, e.g., Bolax gummifera and Azorella trifurcata (cushion plants) were associated with high grazing pressure in grasslands and fires in forested areas, while Rumex acetosella and Achillea millefolium (erect herbs), typically associated with forested areas, were related to high harvesting pressures and fire impacts. These findings contribute to our understanding of the long-term effects of some human impacts (e.g., harvesting and ranching) and allow us to define variables of monitoring and indicator species for each impact type.
EEA Santa Cruz
Fil: Rosas, Yamina Micaela. University of Copenhagen. Department of Geosciences and Natural Resource Management; Dinamarca.
Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina.
Fil: Peri, Pablo Luis. Universidad Nacional de la Patagonia Austral; Argentina.
Fil: Peri, Pablo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
Fil: Cellini, Juan Manuel. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. Laboratorio de Investigaciones en Maderas; Argentina.
Fil: Lencinas, María Vanessa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas (CADIC); Argentina.
Fil: Kepfer-Rojas, Sebastian. University of Copenhagen. Department of Geosciences and Natural Resource Management; Dinamarca.
Fil: Kappel Schmidt, Inger. University of Copenhagen. Department of Geosciences and Natural Resource Management; Dinamarca.
Fil: Pechar, Sebastián. Consorcio Regional de Experimentación Agrícola. Grupo Tierra del Fuego, Ea. El Roble; Argentina.
Fil: Barrera, Marcelo Daniel. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. Laboratorio de Investigación de Sistemas Ecológicos y Ambientales; Argentina.
Fil: Martínez Pastur, Guillermo José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas (CADIC); Argentina.