Fecha/hora: 13/06/2024 04:22:40

Biblioteca(s): | INIA Las Brujas.
Fecha corriente: | 16/03/2020
Fecha de la última actualización: | 16/03/2020
Autoria: | GALLEGO, F.; PARUELO, J.; BAEZA, S.; ALTESOR, A.
Afiliación: | FEDERICO GALLEGO, Instituto de Ecología y Ciencias Ambientales, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay; JOSÉ PARUELO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; Facultad de Ciencias, Universidad de la República, Mdeo, Uruguay; Depto. Métodos Cuantitativos y Sistemas de Información, Facultad de Agronomía and IFEVA, UBA and CONICET, Bs.As., Argentina; SANTIAGO BAEZA, Departamento de Sistemas Ambientales, Facultad de Agronomía, Universidad de la República, Montevideo, Uruguay; ALICE ALTESOR, Instituto de Ecología y Ciencias Ambientales, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay.
Título: | Distinct ecosystem types respond differentially to grazing exclosure.
Año de publicación: | 2020
Fuente/Imprenta: | Austral Ecology, 2020. Doi: https://doi.org/10.1111/aec.12870
ISSN: | 1442-9985
DOI: | 10.1111/aec.12870
Idioma: | Inglés

Notas:

Article history: Accepted for publication January 2020 / First published: 28 February 2020.
Corresponding author:  Gallego, F., email:fgallego@fcien.edu.uy

Contenido:

ABSTRACT.
Here, we evaluate the ecosystem functioning and the ecosystems services supply of different vegetation types (grasslands, shrublands and woodlands) under contrasting management regimes by comparing a protected area with the surrounding landscape, which has been subjected to human disturbance in the Eastern Hills of Uruguay. We propose, based on functional attributes and vegetation physiognomy, a State and Transition Model for the dynamics of the grassland?woodland mosaic. We used remote sensing techniques to: (i) develop a land-cover map of the study area based on supervised Landsat imagery classification, and (ii) compare attributes of the ecosystem functioning (productivity and seasonality) and service supply derived from the Normalized Difference Vegetation Index (NDVI) images provided by the moderate resolution imaging spectroradiometer (MODIS) sensor. The land-cover map showed that grasslands and shrublands were the most extensive land covers in the study area. These vegetation types presented higher productivity, seasonality and ecosystem service supply, outside the protected area than inside it. On the other hand, woodlands showed higher productivity, ecosystem service supply and lower seasonality inside the protected area than outside of it. Two axes represented the grassland?woodland mosaic dynamic: (i) the mean annual and (ii) the intra-annual coefficient of variation of the NDVI. Our results highlight that conservation of grasslands, shrublands and woodlands require different management strategies based on particular disturbance regimes like moderate grazing and controlled burns. Moderate disturbances may help to preserve ecosystem services provisioning in grasslands and shrublands. On the contrary, woodland conservation requires a more rigorous regime of protection against disturbances. © 2020 Ecological Society of Australia

Palabras-Clave: | Ecosystem services; Grassland; Normalized Difference Vegetation Index; Remote sensing; State and transition model; Woodland mosaic ecosystem.
Categoría del tema: | A50 Investigación agraria
Registro original: | INIA Las Brujas (LB)
Ejemplares: | LB - (102224-1) - PXI - AP - DD - PP/AUSTRAL ECOLOGY/2020 -  -  - DIS