globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13218
论文题名:
Land cover change and carbon emissions over 100 years in an African biodiversity hotspot
作者: Willcock S.; Phillips O.L.; Platts P.J.; Swetnam R.D.; Balmford A.; Burgess N.D.; Ahrends A.; Bayliss J.; Doggart N.; Doody K.; Fanning E.; Green J.M.H.; Hall J.; Howell K.L.; Lovett J.C.; Marchant R.; Marshall A.R.; Mbilinyi B.; Munishi P.K.T.; Owen N.; Topp-Jorgensen E.J.; Lewis S.L.
刊名: Global Change Biology
出版年: 2016
卷: 22, 期:8
起始页码: 2787
结束页码: 2800
语种: 英语
英文关键词: afforestation ; carbon ; deforestation ; ecosystem service ; emission ; land use change ; protected area ; reforestation
Scopus关键词: afforestation ; biodiversity ; carbon emission ; deforestation ; ecosystem service ; land cover ; land use change ; protected area ; reforestation ; tropical region ; Eastern Arc Mountains ; Tanzania
英文摘要: 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. © 2016 John Wiley & Sons Ltd.
资助项目: Willcock, S. ; School of Geography, University of LeedsUnited Kingdom ; 电子邮件: s.p.willcock@soton.ac.uk
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61343
Appears in Collections:影响、适应和脆弱性

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作者单位: School of Geography, University of Leeds, Leeds, United Kingdom; Centre for Biological Sciences, University of Southampton, Southampton, United Kingdom; Department of Biology, University of York, York, United Kingdom; Department of Geography, Staffordshire University, Stoke-on-Trent, United Kingdom; Department of Zoology, University of Cambridge, Cambridge, United Kingdom; Center of Macroecology, Evolution and Climate, Copenhagen, Denmark; UNEP World Conservation Monitoring Centre, Cambridge, United Kingdom; Genetics and Conservation, Royal Botantic Garden Edinburgh, Edinburgh, United Kingdom; Department of Biological & Medical Sciences, Oxford Brookes University, Oxford, United Kingdom; Tanzanian Forest Conservation Group, Dar es Salaam, Tanzania; Frankfurt Zoological Society, Frankfurt, Germany; The Society for Environmental Exploration, London, United Kingdom; Princeton University, Princeton, NJ, United States; Department of Geography, University of Florida, PO Box 117315, Gainesville, FL, United States; The University of Dar es Salaam, Dar es Salaam, Tanzania; Environment Department, University of York, York, United Kingdom; Centre for the Integration of Research, Conservation and Learning, Flamingo Land Ltd., Malton, United Kingdom; Sokoine University of Agriculture, PO Box 3001, Morogoro, Tanzania; Zoological Society of London, London, United Kingdom; Department of Bioscience, Aarhus University, Aarhus C, Denmark; Department of Geography, University College London, London, United Kingdom

Recommended Citation:
Willcock S.,Phillips O.L.,Platts P.J.,et al. Land cover change and carbon emissions over 100 years in an African biodiversity hotspot[J]. Global Change Biology,2016-01-01,22(8)
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