author = "Aguiar, Daniel Alves and Mello, Marcio Pupin and Nogueira, Sandra 
                         Furlan and Gon{\c{c}}alves, F{\'a}bio Guimar{\~a}es and Adami, 
                         Marcos and Rudorff, Bernardo Friedrich Theodor",
          affiliation = "{Agrosat{\'e}lite Geotecnologia Aplicada} and {Instituto Nacional 
                         de Pesquisas Espaciais (INPE)} and {Empresa Brasileira de Pesquisa 
                         Agropecu{\'a}ria (EMBRAPA)} and {Canopy Remote Sensing Solutions} 
                         and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Agrosat{\'e}lite Geotecnologia Aplicada}",
                title = "MODIS time series to detect anthropogenic interventions and 
                         degradation processes in tropical pasture",
              journal = "Remote Sensing",
                 year = "2017",
               volume = "9",
               number = "1",
                pages = "73",
             keywords = "Biological degradation, Biophysical parameters, EVI2 time series, 
                         Pasture recovery, Pasture reformation, Pasture renewal, 
                         Phenological metrics.",
             abstract = "The unavoidable diet change in emerging countries, projected for 
                         the coming years, will significantly increase the global 
                         consumption of animal protein. It is expected that Brazilian 
                         livestock production, responsible for close to 15% of global 
                         production, be prepared to answer to the increasing demand of 
                         beef. Consequently, the evaluation of pasture quality at regional 
                         scale is important to inform public policies towards a rational 
                         land use strategy directed to improve livestock productivity in 
                         the country. Our hypothesis is that MODIS images can be used to 
                         evaluate the processes of degradation, restoration and renovation 
                         of tropical pastures. To test this hypothesis, two field campaigns 
                         were performed covering a route of approximately 40,000 km through 
                         nine Brazilian states. To characterize the sampled pastures, 
                         biophysical parameters were measured and observations about the 
                         pastures, the adopted management and the landscape were collected. 
                         Each sampled pasture was evaluated using a time series of MODIS 
                         EVI2 images from 2000-2012, according to a new protocol based on 
                         seven phenological metrics, 14 Boolean criteria and two numerical 
                         criteria. The theoretical basis of this protocol was derived from 
                         interviews with producers and livestock experts during a third 
                         field campaign. The analysis of the MODIS EVI2 time series 
                         provided valuable historical information on the type of 
                         intervention and on the biological degradation process of the 
                         sampled pastures. Of the 782 pastures sampled, 26.6% experienced 
                         some type of intervention, 19.1% were under biological 
                         degradation, and 54.3% presented neither intervention nor trend of 
                         biomass decrease during the period analyzed.",
                  doi = "10.3390/rs9010073",
                  url = "http://dx.doi.org/10.3390/rs9010073",
                 issn = "2072-4292",
             language = "en",
           targetfile = "aguiar_modis.pdf",
        urlaccessdate = "11 abr. 2021"