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Deforestation dynamics in a fragmented region of southern Amazonia: evaluation and future scenarios

  • FERNANDA MICHALSKI (a1) (a2), CARLOS A. PERES (a1) and IAIN R. LAKE (a1)

The ‘arc of deforestation’ of southern Amazonia has one of the highest deforestation rates documented anywhere in the world. Landscape changes in a poorly studied but strategically important region in the Brazilian Amazon were studied using biennial Landsat TM/ETM+ images from 1984 to 2004. Deforestation rate for the period 1984–2004 was 2.47% yr−1 in the 7295 km2 study area, but decreased to 1.99% and 2.15% in 2000–2002 and 2002–2004, respectively. Landscape structure changes were characterized by smaller forest patches that were further apart, but increasingly complex in shape. Deforestation was mainly driven by cattle ranching, which in turn was affected by distance to roads, with forest cover increasing at greater distances from roads. A multi-layer perceptron was used to develop future scenarios based on Markov Chain analysis. Based on current land use, forest cover in the region will decline from 42% in 2004 to 21% by 2016. Results indicate a critical threshold at 51% of forest cover in which landscape structure and connectivity changes abruptly. This suggests that the region requires greater efforts in environmental law enforcement, land-use planning and education programmes to maintain the remaining forest cover near this threshold.

Corresponding author
*Correspondence: Dr Fernanda Michalski Fax: +55 51 3332 0762 e-mail:
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Alves, D.S., Pereira, J.L.G., Souza, C.L., Soares, J.V. & Yamaguchi, F. (1999) Characterizing landscape changes in central Rondônia using Landsat TM imagery. International Journal of Remote Sense 20: 28772882.
Armenteras, D., Rudas, G., Rodriguez, N., Sua, S. & Romero, N. (2006) Patterns and causes of deforestation in the Colombian Amazon. Ecological Indicators 6: 353368.
Asner, G.P., Knapp, D.E., Broadbent, E.N., Oliveira, P.J.C., Keller, M. & Silva, J.N. (2005) Selective logging in the Brazilian Amazon. Science 310: 480482.
Avissar, R., da Silva, R.R., & Werth, D. (2006) Impacts of tropical deforestation on regional and global hydroclimatology. In: Emerging Threats to Tropical Forests, ed. Laurance, W. F. & Peres, C.A., pp. 6779. Chicago, IL, USA: University of Chicago Press.
Baumann, R., Rivero, J., Zavattiero, Y. & ECLAC, Brasilia office (1998) Tariffs and the Plano Real in Brazil. Cepal Review 66: 171185.
Brandão, A.O. & Souza, C.M. (2006) Mapping unofficial roads with Landsat images: a new tool to improve the monitoring of the Brazilian Amazon rainforest. International Journal of Remote Sensing 27: 177189.
Brown, D.G., Pijanowski, B.C. & Duh, J.D. (2000) Modeling the relationships between land use and land cover on private lands in the Upper Midwest, USA. Journal of Environmental Management 59: 247263.
Carsjens, G.J. & van Lier, H.N. (2002) Fragmentation and land-use planning – an introduction. Landscape and Urban Planning 58: 7982.
Clark Labs (1987–2006) Idrisi 15: The Andes Edition. The Idrisi Project. Clark University, Worcester, MA, USA [www document]. URL
Coppedge, B.R., Engle, D.M., Fuhlendorf, S.D., Masters, R.E., & Gregory, M.S. (2001) Landscape cover type and pattern dynamics in fragmented southern Great Plains grasslands, USA. Landscape Ecology 16: 677690.
Cox, P.M., Betts, R.A., Collins, M., Harris, P.P., Huntingford, C. & Jones, C.D. (2004) Amazonian forest dieback under climate-carbon cycle projections for the 21st century. Theoretical and Applied Climatology 78: 137156.
Davidson, C. (1998) Issues in measuring landscape fragmentation. Wildlife Society Bulletin 26: 3237.
Davidson, E.A. & Artaxo, P. (2004) Globally significant changes in biological processes of the Amazon basin: results of the large-scale biosphere-atmosphere experiment. Global Change Biology 10: 519529.
Diamond, J.M. (1976) Island biogeography and conservation: strategy and limitations. Science 193: 10271029.
ESRI (2005) ArcGis-version 9.1. Redlands, California, USA.
Fahrig, L. (2003) Effects of habitat fragmentation on biodiversity. Annual Review of Ecology Evolution and Systematics 34: 487515.
Ferraz, S.F. de B., Vettorazzi, C.A., Theobald, D.M. & Ballester, M.V.R. (2005) Landscape dynamics of Amazonian deforestation between 1984 and 2002 in central Rondônia, Brazil: assessment and future scenarios. Forest Ecology and Management 204: 6783.
Ferraz, S.F. de B, Capao, L.M.S.A.C. & Vettorazzi, C.A. (2006) Temporal scale and spatial resolution effects on Amazon forest fragmentation assessment in Rondonia. International Journal of Remote Sensing 27: 459472.
Gardner, R.H., Milne, B.T., Turner, M.G. & O'Neill, R.V. (1987) Neutral models for the analysis of broad-scale landscape pattern. Landscape Ecology 1: 1928.
Grainger, A. (1993) Rates of deforestation in the humid tropics: estimates and measurements. The Geographical Journal 159: 3344.
Gullison, R.E., Frumhoff, P.C., Canadell, J.G., Field, C.B., Nepstad, D.C., Hayhoe, K., Avissar, R., Curran, L.M., Friedlingstein, P., Jones, C.D. & Nobre, C. (2007) Tropical forests and climate policy. Science 316: 985986.
Gurd, D.B., Nudds, T.D. & Rivard, D.H. (2001) Conservation of mammals in Eastern North American wildlife reserves: how small is too small? Conservation Biology 15: 13551363.
Gustafson, E.J. (1998) Quantifying landscape spatial pattern: what is the state of the art? Ecosystems 1: 143156.
Gustafson, E.J. & Parker, G.R. (1992) Relationships between landcover proportion and indexes of landscape spatial pattern. Landscape Ecology 7: 101110.
Hacon, S. (1996) Avaliação do risco potencial para saúde humana da exposição de mercúrio na área urbana de Alta Floresta, MT, Bacia Amazônica, Brasil. PhD dissertation, Universidade Federal Fluminense, Niterói, RJ, Brazil: 172 pp.
Hacon, S., Artaxo, P., Gerab, F., Yamasoe, M.A., Campos, R.C., Conti, L.F. & Lacerda, L.D. (1995) Atmospheric mercury and trace elements in the region of Alta Floresta in the Amazon Basin. Water, Air and Soil Pollution 80: 273283.
Hansen, M.C. & DeFries, R.S. (2004) Detecting long-term global forest change using continuous fields of tree-cover maps from 8-km Advanced Very High Resolution Radiometer (AVHRR) data for the years 1982–99. Ecossystems 7: 695716.
Hecht, S.B. (1993) The logic of livestock and deforestation in Amazonia. BioScience 43: 687695.
Hill, J.L. & Curran, P.J. (2003) Area, shape and isolation of tropical forest fragments: effects on tree species diversity and implications for conservation. Journal of Biogeography 30: 13911403.
IBGE (2006) Pesquisa Pecuária Municipal 1990–2005 [www document]. URL
IBGE (2007) Estimativas populacionais para os municípios brasileiros 1990–2006 [www document]. URL
INPE (2008) Levantamento das áreas deflorestadas da Amazônia Legal no período 1988–2008: resultados. Ministério da Ciência e Tecnologia, São José dos Campos, SP, Brazil [www document]. URL
Kirby, K.R., Laurance, W.F., Albernaz, A.K., Schroth, G., Fearnside, P.M., Bergen, S., Venticinque, E.M. & da Costa, C. (2006) The future of deforestation in the Brazilian Amazon. Futures 38: 432453.
Lacerda, L.D., de Souza, M. & Ribeiro, M.G. (2004) The effects of land use change on mercury distribution in soils of Alta Floresta, Southern Amazon. Environmental Pollution 129: 247255.
Landis, R.J. & Koch, G.G. (1977) The measurement of observer agreement for categorical data. Biometrics 33: 159174.
Laurance, W.F., Lovejoy, T.E., Vasconcelos, H.L., Bruna, E.M., Didham, R.K., Stouffer, P.C., Gascon, C., Bierregaard, R.O., Laurance, S.G. & Sampaio, E. (2002 a) Ecossystem decay of Amazonian forest fragments: a 22-year investigation. Conservation Biology 16: 605618.
Laurance, W.F., Albernaz, A.K.M., Schroth, G., Fearnside, P.M., Bergen, S., Venticinque, E.M. & Costa, C. da. (2002 b) Predictors of deforestation in the Brazilian Amazon. Journal of Biogeography 29: 737748.
Lees, A.C. & Peres, C.A. (2006) Rapid avifaunal collapse along the Amazonian deforestation frontier. Biological Conservation 133: 198211.
MacArthur, R.H. & Wilson, E.O. (1967) The Theory of Island Biogeography. Princeton, NJ, USA: Princeton University Press.
Mas, J.F., Puig, H., Palacio, J.L. & Sosa-López, A. (2004) Modelling deforestation using GIS and artificial neural networks. Ecological Modelling and Software 19: 461471.
Mayaux, P., Holmgren, P., Achard, F., Eva, H., Stibig, H. & Branthomme, A. (2005) Tropical forest cover change in 1990s and options for future monitoring. Philosophical Transactions of the Royal Society B – Biological Sciences 360: 373384.
McGarigal, K. & Marks, B.J. (1995) FRAGSTATS: spatial pattern analysis program for quantifying landscape structure. USDA Forest Service GTR PNW-351, USA.
Meir, P., Cox, P. & Grace, J. (2006) The influence of terrestrial ecosystems on climate. Trends in Ecology and Evolution 21: 254260.
Michalski, F. & Peres, C.A. (2005) Anthropogenic determinants of primate and carnivore local extinctions in a fragmented forest landscape of southern Amazonia. Biological Conservation 124: 383396.
Michalski, F. & Peres, C.A. (2007) Disturbance-mediated mammal persistence and abundance-area relationships in Amazonian forest fragments. Conservation Biology 21: 16261640.
Moran, E.F., Packer, A., Brondizio, E. & Tucker, J. (1996) Restoration of vegetation cover in the eastern Amazon. Ecological Economics 18: 4154.
Muller, M.R. & Middleton, J. (1994) A markov model of land-use change dynamics in the Niagara region, Ontario, Canada. Landscape Ecology 9: 151157.
Neel, M.C., McGarigal, K. & Cushman, S.A. (2004) Behavior of class-level landscape metrics across gradients of class aggregation and area. Landscape Ecology 19: 435455.
Nepstad, D.C., Stickler, C.M. & Almeida, O.T. (2006) Globalization of the Amazon soy and beef industries: opportunities for conservation. Conservation Biology 20: 15951603.
O'Neill, R.V., Krummel, J.R., Gardner, R.H., Sugihara, G., Jackson, B., DeAngelis, D.L., Milne, B.T., Turner, M.G., Zygmunt, B., Christensen, S.W., Dale, V.H. & Graham, R.L. (1988) Indices of landscape pattern. Landscape Ecology 1: 153162.
Oliveira-Filho, F.J.B. & Metzger, J.P. (2006) Thresholds in landscape structure for three common deforestation patterns in the Brazilian Amazon. Landscape Ecology 21: 10611073.
Ott, L., Larson, R.F. & Mendenhall, W. (1983) Statistics: A Tool for the Social Sciences. Boston, USA: Duxbury Press.
Peres, C.A. & Michalski, F. (2006) Synergistic effects of habitat disturbance and hunting in Amazonian forest fragments. In: Emerging Threats to Tropical Forests, ed. Laurance, W.F. & Peres, C.A., pp. 105127. Chicago, IL USA: University of Chicago Press.
Pontius, R.G., Cornell, J.D. & Hall, C.A.S. (2001) Modelling the spatial pattern of land-use change with GEOMOD2: application and validation in Costa Rica. Agriculture, Ecossystems and Environment 85: 191203.
Rosenfield, G.H. & Fitzpatrick-Lins, K. (1986) A coefficient of agreement as a measure of thematic classification accuracy. Photogrammetric Engineering and Remote Sensing 52: 223227.
Sader, S.A. & Joyce, A.T. (1988) Deforestation rates and trends in Costa Rica, 1940–1983. Biotropica 20: 1119.
Sala, O.E., Chapin, F.S.I., Armesto, J.J., Berlow, E., Bloomfield, J., Dirzo, R., Huber-Sanwald, E., Huenneke, L.F., Jackson, R.B., Kinzig, A., Leemans, R., Lodge, D.M., Mooney, H.A., Oesterheld, M., Poff, N.L., Sykes, M.T., Walker, B.H., Walker, M. & Wall, D.H. (2000) Global biodiversity scenarios for the year 2100. Science 287: 17701774.
Schmiegelow, F.K.A. & Mönkköen, M. (2002) Habitat loss and fragmentation in dynamic landscapes: avian perspectives from the boreal forest. Ecological Applications 12: 375389.
Schumaker, N.H. (1996) Using landscape indices to predict habitat connectivity. Ecology 77: 12101225.
Simberloff, D. (1976) Experimental zoogeography: effects of island size. Ecology 57: 629642.
Skole, D. & Tucker, C.J. (1993) Tropical deforestation and habitat fragmentation in the Amazon: satellite data from 1978 to 1988. Science 260: 19051910.
Smeraldi, R. & May, P. (2008) O reino do gado: uma nova fase na pecuarização da Amazônia. Amigos da Terra, Amazônia Brasileira, São Paulo, Brazil.
Soares-Filho, B.S., Nepstad, D.C., Curran, L.M., Cerqueira, G.C., Garcia, R.A., Ramos, C.A., Voll, E., McDonald, A., Lefebvre, P. & Schlesinger, P. (2006) Modelling conservation in the Amazon basin. Nature 440: 520523.
SOMAVI (2000) Mapa do Município – Estradas vicinais e comunidades. 1:250 000. Alta Floresta, MT: Prefeitura Municipal.
Stauffer, D. (1985) Introduction to Percolation Theory. London, UK: Taylor and Francis.
Steininger, M.K. (2000) Satellite estimation of tropical secondary forest above-ground biomass: data from Brazil and Bolivia. International Journal of Remote Sensing 21: 11391157.
Terborgh, J. (1976) Island biogeography and conservation: strategy and limitations. Science 193: 10291030.
Terborgh, J. & Winter, B. (1980) Some causes of extinction. In: Conservation Biology, and Evolutionary Ecological Perspective, ed. Soulé, M.E. & Wilcox, B.A., pp. 119133. Sunderland, MA, USA: Sinauer Associates.
Trani, M.K. & Giles, R.H. (1999) An analysis of deforestation: metrics used to describe pattern change. Forest Ecology and Management 114: 459470.
Turner, M.G. (1989) Landscape ecology: the effect of pattern on process. Annual Review of Ecology and Systematics 20: 171197.
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