The paper describes recent changes in pastoral systems in Italy and provides an assessment of current farming systems in marginal areas of the country, where extensive livestock rearing still represents an option. Despite public financial support, rural farming in marginal areas increasingly has to find its place within the wider society, integrate into wider markets, support employment and diversify income generation. Provision of environmental as well as recreational services is increasingly complementing quality food production. The heterogeneous Italian landscape provides important opportunities to better integrate crops, trees and livestock into increasingly sustainable agro-silvo-pastoral systems.
As the basis of livestock feeding and related performances, pastures evolution and dynamics need to be carefully monitored and assessed, particularly in the Alps where the effects of land abandonment are further amplified by climate change. As such, increases in temperature associated with changes in precipitation patterns and quantity are leading to modifications of grassland extent and composition with consequences on the pastoral systems. This study applied a machine learning approach (Random Forest) and GIS techniques to map the suitability of seven pasture macro types most representative of the Italian Alps and simulated the impact of climate change on their dynamics according to two future scenarios (RCP4.5, 8.5), two time-slices (2011–2040, 2041–2070), and three RCMs (Aladin, CMCC, ICTP). Results indicated that (i) the methodology was robust to map the current suitability of pasture macro types (mean accuracy classification = 98.7%), so as to predict the expected alterations due to climate change; (ii) future climate will likely reduce current extend of suitable pasture (−30% on average) and composition, especially for most niche ecosystems (i.e., pastures dominated by Carex firma and Festuca gr. Rubra); (iii) areas suited to hardier but less palatable pastures (i.e., dominated by Nardus stricta and xeric species) will expand over the Alps in the near future. These impacts will likely determine risks for biodiversity loss and decreases of pastoral values for livestock feeding, both pivotal aspects for maintaining the viability and profitability of the Alpine pastoral system as a whole.
Resumoo setor da construção civil, a busca por sustentabilidade ainda é incipiente. Este trabalho tem por objetivos analisar a aplicação da certificação LEED TM a empreendimentos brasileiros, entendendo as restrições de uso em uma realidade diferente da referência original norte-americana, e disseminar os resultados obtidos para dois estudos de caso nacionais. Os resultados obtidos confirmaram que (a) a certificação LEED TM não é tarefa fácil e, no Brasil, significa, para vários aspectos, saltar da completa ausência de referência para atender a normas americanas; e (b) mesmo em centros avançados da construção civil brasileira, o mercado ainda não está preparado para os "selos verdes" internacionais. Apesar dos obstáculos e limitações existentes, a entrada de certificações no Brasil abre a discussão para assuntos antes nunca abordados. Certificações, iniciativas voluntárias e instrumentos de market pull possuem o importante papel de propulsores da transformação do mercado da construção civil na busca da sustentabilidade. Não se pode perder de vista que estas pressupõem uma base anterior -composta de pesquisa e desenvolvimento e transferência de conhecimento e tecnologia ao mercado -para que possam se desenvolver plenamente. Deve-se evitar a ansiedade pela busca de certificação sem o preparo do mercado. Caso contrário, corre-se o risco de fragilizar o papel transformador das certificações. Palavras
Rural areas of developing countries are home to about 2.8 billion people that get food, energy, medicines and other products from forestry, agriculture and animal rearing. The monthly share of one of these inhabitants is very little on a world scale; the search for wealth by such a large number of people can cause excessive exploitation and irrational management of natural and agricultural systems which, because of this, experience reduced productivity and resilience. Even if land productivity could be increased tenfold by introducing modern technologies and scientific knowledge, this would not be enough to avoid further environmental degradation and land abandonment. Sustainable management of the ecosystems together with an increase in wealth needs a link between traditional land uses and management with modern income sources and the integration of local and regional rural economies within the economies of the other areas of the world. This link is favoured by the multiple use of the territory and the passage from simplified farming systems to complex agrosilvopastoral systems.
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