02864naa a2200241 a 450000100080000000500110000800800410001902200140006002400410007410000140011524501420012926000090027150004490028052016710072965300170240065300150241765300270243265300150245965300200247465300100249470000160250477301020252010593272021-06-24       2018    bl uuuu     u00u1 u    #d  a0924-27167 a10.1016/j.isprsjprs.2018.07.0142DOI1 aBAEZA, S.  aSpatial and temporal variation of human appropriation of net primary production in the Rio de la Plata grasslands.h[electronic resource]  c2018  aArticle history: Received 29 September 2017 // Received in revised form 23 July 2018 // Accepted 25 July 2018 // Available online 31 July 2018. This work was supported on doctoral fellowships for ANII and CAP-UdelaR, Uruguay (Baeza); by a grant from the Inter-American Institute for Global Change Research (IAI) CRN3095 which is supported by the US National Science Foundation (Grant GEO-1128040 ) and by FONCYT, CONICET and UBACYT (Argentina).  aABSTRACT. Latin America, and particularly, the Rio de la Plata Grasslands (RPG), are one of the regions with the highest rates of land use change worldwide. These changes drastically alter ecosystems energy flows, affecting biodiversity, atmospheric composition, and the ecosystem capacity to provide services. In this work we evaluated the impact of these changes on Net Primary Production (NPP), one of the most important and integrative ecosystem attributes, through the calculation of Human Appropriation of NPP (HANPP), a very complete indicator of human impact on ecosystems. Our results provide a comprehensive and fine grained description of HANPP patterns over an entire biogeographycal region for two periods that encompass a strong agricultural intensification process. We used medium resolution land use maps and NPP estimates from sub-national level agricultural statistics and remotely sensed data modeling. Results show that the human impact on the energy flow in RPG ecosystems reached very high levels compared to other regions of the world. The average appropriation of was 42% of the potential vegetation NPP in 2001/2002 and it increased 4.5% during the last years due to an intense land use changes. Most of the HANPP was explained by harvest rather than by land use changes, mainly in the last period due to crops yield increase and the expansion of double crop system as a common agronomic practice. High HANPP values found were associated to a set of environmental impacts that affect ecosystems sustainability and their ability to provide ecosystem services.  © 2018 International Society for Photogrammetry and Remote Sensing, Inc. (ISPRS)  aBIODIVERSITY  aECOSYSTEMS  aECOSYSTEMS FUNCTIONING  aGRASSLANDS  aLAND USE CHANGE  aMODIS1 aPARUELO, J.  tISPRS Journal of Photogrammetry and Remote Sensing, November 2018gv. 145, Part B, pages 238-249.