Temperate Grassland Afforestation Dynamics in the Aguapey Valuable Grassland Area between 1999 and 2020: Identifying the Need for Protection
نویسندگان
چکیده
Temperate grasslands are considered the most endangered terrestrial ecosystem worldwide; existent areas play a key role in biodiversity conservation. The Aguapey Valuable Grassland Area (VGA), one of well-preserved temperate grassland within Argentina, is currently threatened by anthropogenic expansion exotic tree plantations. Little known about impacts afforestation over landscape structures; therefore, aim this study to characterize VGA structural changes between 1999 and 2020 based on remotely sensed data. This involves generation land cover maps for four annual periods unsupervised classification Landsat 5 TM 8 OLI images, estimation metrics, transition analysis types periods. area covered shown have decreased almost 22% 20 year-period studied, due plantation cover. process took place mainly 2007 northern region VGA, which led first perforation subsequently attrition; however, Aguapey’s cultural tradition cattle ranching could partially inhibited trees final years study. evidence loss fragmentation should be as an early warning promote development sustainable use policies, focused towards VGA’s southern where remains predominant type.
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ژورنال
عنوان ژورنال: Remote Sensing
سال: 2021
ISSN: ['2315-4632', '2315-4675']
DOI: https://doi.org/10.3390/rs14010074