Socioeconomic Changes and Land Use and Land Cover of the Northern Region of Rio Grande do Sul, Brazil

Abstract

The dynamics of land use and cover at different spatial and temporal scales allows us to evaluate changes in landscapes, socioeconomic system and impacts on the natural environment. Land use and land cover changes and socioeconomic activities of the Northern Region of Rio Grande do Sul, Brazil were analyzed over a 20-year scale. Using images from the Landsat 5 sensor TM, land use and land cover maps were obtained for 1991, 2001 and 2011, in which agricultural uses, native vegetation and pasture presented a significant difference between the years. We identified two scenarios for the region: the northern portion presents a reduction in agricultural areas and an increase in pasture and native vegetation, while the southern portion presents a constancy of agricultural areas. The predominant agricultural uses and socioeconomic factors determined the major changes in landscape structure. The effects of these changes resulted in a reduction in the area of agricultural uses and expansion of native vegetation and pasture areas.

Os Usos E Cobertura Da Terra Influenciam a Comunidade De Macroinvertebrados Bentônicos Em Riachos?

“…Esse estudo foi realizado em nove riachos de pequena ordem (≤3ª ordem) localizados na Região Alto Uruguai, norte do Rio Grande do Sul, entre as coordenadas geográficas de 27°12'59" a 28°00'47" de latitude Sul e 51°49'34" a 52°48'12" de longitude Oeste (Figura 1). A região possui uma área de 591,610.00 hectares (ROVANI et al, 2020) e apresenta expressiva atividade agrícola (cerca de 70% da área), com cultivos de soja e milho nos meses mais quentes (outubro a março), e trigo nos meses mais frios (maio a agosto) (DECIAN et al, 2009).…”

Agriculture affects functional diversity of aquatic insects in Subtropical Atlantic Forest streams

“…It is estimated that about 40% of the planet's surface is occupied by agricultural activities (Graeber et al, 2015). However, the agricultural expansion reflects in the fragmentation of natural landscapes, water resources degradation, and aquatic diversity decrease (Paz et al, 2020;Huiñocana et al, 2020;Rovani et al, 2020).…”