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Land cover change and carbon emissions over 100 years in an African biodiversity hotspot.
Willcock, Simon; Phillips, Oliver L; Platts, Philip J; Swetnam, Ruth D; Balmford, Andrew; Burgess, Neil D; Ahrends, Antje; Bayliss, Julian; Doggart, Nike; Doody, Kathryn; Fanning, Eibleis; Green, Jonathan M H; Hall, Jaclyn; Howell, Kim L; Lovett, Jon C; Marchant, Rob; Marshall, Andrew R; Mbilinyi, Boniface; Munishi, Pantaleon K T; Owen, Nisha; Topp-Jorgensen, Elmer J; Lewis, Simon L.
Afiliación
  • Willcock S; School of Geography, University of Leeds, Leeds, LS2 9JT, UK.
  • Phillips OL; Centre for Biological Sciences, University of Southampton, Southampton, SO17 1BJ, UK.
  • Platts PJ; School of Geography, University of Leeds, Leeds, LS2 9JT, UK.
  • Swetnam RD; Department of Biology, University of York, York, YO10 5DD, UK.
  • Balmford A; Department of Geography, Staffordshire University, Stoke-on-Trent, ST4 2DF, UK.
  • Burgess ND; Department of Zoology, University of Cambridge, Cambridge, CB2 3EJ, UK.
  • Ahrends A; Center of Macroecology, Evolution and Climate, Copenhagen, DK-2100, Denmark.
  • Bayliss J; UNEP World Conservation Monitoring Centre, Cambridge, CB3 0DL, UK.
  • Doggart N; Genetics and Conservation, Royal Botantic Garden Edinburgh, Edinburgh, EH3 5LR, UK.
  • Doody K; Department of Biological & Medical Sciences, Oxford Brookes University, Oxford, OX3 0BP, UK.
  • Fanning E; Tanzanian Forest Conservation Group, PO Box 23410, Dar es Salaam, Tanzania.
  • Green JM; Frankfurt Zoological Society, Frankfurt, D-60316, Germany.
  • Hall J; The Society for Environmental Exploration, London, EC2A 3QP, UK.
  • Howell KL; STEP Program, Princeton University, Princeton, NJ, 08544, USA.
  • Lovett JC; Department of Geography, University of Florida, PO Box 117315, Gainesville, FL, 32611, USA.
  • Marchant R; The University of Dar es Salaam, PO Box 35091, Dar es Salaam, Tanzania.
  • Marshall AR; School of Geography, University of Leeds, Leeds, LS2 9JT, UK.
  • Mbilinyi B; Environment Department, University of York, York, YO10 5DD, UK.
  • Munishi PK; Environment Department, University of York, York, YO10 5DD, UK.
  • Owen N; Centre for the Integration of Research, Conservation and Learning, Flamingo Land Ltd., Malton, YO 17 6UX, UK.
  • Topp-Jorgensen EJ; Sokoine University of Agriculture, PO Box 3001, Morogoro, Tanzania.
  • Lewis SL; Sokoine University of Agriculture, PO Box 3001, Morogoro, Tanzania.
Glob Chang Biol ; 22(8): 2787-800, 2016 08.
Article en En | MEDLINE | ID: mdl-26748590
Agricultural expansion has resulted in both land use and land cover change (LULCC) across the tropics. However, the spatial and temporal patterns of such change and their resulting impacts are poorly understood, particularly for the presatellite era. Here, we quantify the LULCC history across the 33.9 million ha watershed of Tanzania's Eastern Arc Mountains, using geo-referenced and digitized historical land cover maps (dated 1908, 1923, 1949 and 2000). Our time series from this biodiversity hotspot shows that forest and savanna area both declined, by 74% (2.8 million ha) and 10% (2.9 million ha), respectively, between 1908 and 2000. This vegetation was replaced by a fivefold increase in cropland, from 1.2 million ha to 6.7 million ha. This LULCC implies a committed release of 0.9 Pg C (95% CI: 0.4-1.5) across the watershed for the same period, equivalent to 0.3 Mg C ha(-1)  yr(-1) . This is at least threefold higher than previous estimates from global models for the same study area. We then used the LULCC data from before and after protected area creation, as well as from areas where no protection was established, to analyse the effectiveness of legal protection on land cover change despite the underlying spatial variation in protected areas. We found that, between 1949 and 2000, forest expanded within legally protected areas, resulting in carbon uptake of 4.8 (3.8-5.7) Mg C ha(-1) , compared to a committed loss of 11.9 (7.2-16.6) Mg C ha(-1) within areas lacking such protection. Furthermore, for nine protected areas where LULCC data are available prior to and following establishment, we show that protection reduces deforestation rates by 150% relative to unprotected portions of the watershed. Our results highlight that considerable LULCC occurred prior to the satellite era, thus other data sources are required to better understand long-term land cover trends in the tropics.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Carbono / Conservación de los Recursos Naturales / Biodiversidad Tipo de estudio: Prognostic_studies Idioma: En Revista: Glob Chang Biol Año: 2016 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Carbono / Conservación de los Recursos Naturales / Biodiversidad Tipo de estudio: Prognostic_studies Idioma: En Revista: Glob Chang Biol Año: 2016 Tipo del documento: Article Pais de publicación: Reino Unido