This work is licensed under a Creative Commons Attribution 4.0 International License.
The politics of numbers and additionality governing the national Payment for Forest Environmental Services scheme in Vietnam: A case study from Son La province
Corresponding Author(s) : Pham Thu Thuy
Forest and Society,
Vol. 4 No. 2 (2020): NOVEMBER
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- Alonso, W. & Starr P. (1987). The politics of numbers. Russell Sage Foundation.
- Angelsen, A. (2017). REDD+ as result‐based aid: General lessons and bilateral agreements of Norway. Review of Development Economics, 21(2), 237-264. doi: https://doi.org/10.1111/rode.12271
- Bennett, K. (2010). Additionality: The next steps for ecosystem service markets. Duke Environmental Law & Policy Forum 20, 417-438.
- Bos, A. B. (2020). Richting een verbeterde evaluatie van subnationale initiatieven die tropische ontbossing verminderen. Geo-Info, 17(2), 40-41.
- Bottazzi, P., Wiik, E., Crespo, D., & Jones, J. P. (2018). Payment for environmental “self-service”: Exploring the links between Farmers' motivation and additionality in a conservation incentive programme in the Bolivian Andes. Ecological Economics 150, 11-23. doi: https://doi.org/10.1016/j.ecolecon.2018.03.032
- Brockhaus, M., & Angelsen, A. (2012). Seeing REDD+ through 4Is: a political economy framework. Analysing REDD+: challenges and choices. Center for International Forestry Research, Bogor, Indonesia, 15-30.
- De Sy, V., Herold, M., Brockhaus, M., Di Gregorio, M., & Ochieng, R. M. (2018). Information and policy change: Data on drivers can drive change–if used wisely. In Transforming REDD+, 55-66. Center for International Forestry Research (CIFOR).
- Desrosières, A. (2010). La politique des grands nombres. Historie de la raison statistique. Paris: La Découverte.
- Dung Minh. (2018). Planting fruit trees in Chieng Khua village. Translated from Trồng cây ăn quả ở xã Chiềng Khừa. Nhan Dan Online Newspaper. https://nhandan.com.vn/tin-tuc-kinh-te/trong-cay-an-qua-o-xa-chieng-khua-318536/.
- Duong, N. T. & de Groot, W. T. (2018). Distributional risk in PFES: Exploring the concept in the Payment for Environmental Forest Services program, Vietnam. Forest Policy and Economics, 92, 22-32. doi: https://doi.org/10.1016/j.forpol.2018.03.008
- Duong, N. T. & de Groot, W. T. (2020). The impact of payment for forest environmental services (PFES) on community-level forest management in Vietnam. Forest Policy and Economics, 113, 102135. doi: https://doi.org/10.1016/j.forpol.2020.102135
- Eichelberger, L. (2012). sustainability and the politics of calculation: Technologies of 'safe water,' subject-making, and domination. Journal of Political Ecology, 19(1): 145-161.
- Engel, S. (2016). The devil in the detail: a practical guide on designing payments for environmental services. International Review of Environmental and Resource Economics, 9(1-2), 131-177. doi: https://doi.org/10.1561/101.00000076
- Gupta, A., Lövbrand, E., Turnhout, E., & Vijge, M. J. (2012). In pursuit of carbon accountability: the politics of REDD+ measuring, reporting and verification systems. Current Opinion in Environmental Sustainability, 4(6), 726-731. doi: https://doi.org/10.1016/j.cosust.2012.10.004
- Gupta, A., Vijge, M. J., Turnhout, E., & Pistorius, T. (2014). Making REDD+ transparent: the politics of measuring, reporting and verification systems. In Transparency in global environmental governance: critical perspectives (pp. 181-20).
- Hansen, M. C., P. V. Potapov, R. Moore, M. Hancher, S. A. Turubanova, A. Tyukavina, D. Thau, S. V. Stehman, S. J. Goetz, T. R. Loveland, A. Kommareddy, A. Egorov, L. Chini, C. O. Justice, and J. R. G. Townshend. (2016). “High-Resolution Global Maps of 21st-Century Forest Cover Change.” Science 342 (15 November): 850–53. Data available on-line from: http://earthenginepartners.appspot.com/science-2013-global-forest.
- Hasan, S. S., Zhang, Y., Chu, X., & Teng, Y. (2019). The role of big data in China’s sustainable forest management. Forestry Economics Review.
- Jebiwott, A. (2016). Forest cover change and ecosystem services of Katimok forest reserve, Baringo County, Kenya (Doctoral dissertation). Kenya: Egerton University.
- Karsenty, A., Aubert, S., Brimont, L., Dutilly, C., Desbureaux, S., Ezzine de Blas, D., & Le Velly, G. (2017). The economic and legal sides of additionality in payments for environmental services. Environmental Policy and Governance, 27(5), 422-435. doi: https://doi.org/10.1002/eet.1770
- Le Velly, G., & Dutilly, C. (2016). Evaluating payments for environmental services: Methodological challenges. PLOS One, 11(2), e0149374. doi: https://doi.org/10.1371/journal.pone.0149374
- Mcgregor, Ja. (2007). Researching human well‐being: from concepts to methodology. In Gough I & Mcgregor J (Eds), Well‐being in developing countries: new approaches and research strategies (pp. 316– 350). Cambridge University Press.
- Mohebalian, P. M., & Aguilar, F. X. (2016). Additionality and design of forest conservation programs: Insights from Ecuador's Socio Bosque Program. Forest Policy and Economics, 71, 103-114. doi: https://doi.org/10.1016/j.forpol.2015.08.002
- Mùi Sơn & Minh Hải. (2019). Moc Chau - Son La: Lam forest blatantly destroyed Chieng Khua forest. Translated from Mộc Châu - Sơn La: Lâm tặc ngang nhiên tàn phá rừng Chiềng Khừa. Kien Thuc Online Newspaper. https://kienthuc.net.vn/xa-hoi/moc-chau-son-la-lam-tac-ngang-nhien-tan-pha-rung-chieng-khua-1209627.html.
- Naeem, S., Ingram, J. C., Varga, A., Agardy, T., Barten, P., Bennett, G., Bloomgarden, E., Bremer, L.L., Burkill, P., Cattau, M., Ching, C., Colby†, M., Cook, D.C., Costanza, R., DeClerck, F., Freund, C., Gartner, T., Goldman-Benner, R., Gunderson, J., Jarrett, D., Kinzig, A.P, Kiss, A., Koontz, A., Kumar, P., Lasky, J.R., Masozera, M., Meyers, D., Milano, F., Naughton-Treves, L., Nichols, E., Olander, L., Olmsted, P., Perge, E., Perrings, C., Polasky, S., Potent, J., Prager, C., Quétier, F., Redford, K., Saterson†, K., Thoumi, G., Vargas, M.T., Vickerman, S., Weisser, W., Wilkie, D., Wunder, S. (2015). Get the science right when paying for nature's services. Science, 347(6227), 1206-1207. doi: https://doi.org/10.1126/science.aaa1403
- Pagiola, S., Carrascosa von Glehn, H., & Taffarello, D. (2013). Brazil's experience with payments for environmental services. São Paulo: SMA/CBRN, 274.
- People's Committee of Chieng Khua Commune. (2018). Reports on socioeconomic context in Chieng Khua Commune. Retrieved from People's Committee of Chieng Khua Commune.
- People's Committee of Dong Sang Commune. (2018). Reports on socioeconomic context in Dong Sang Commune. Retrieved from People's Committee of Dong Sang Commune.
- People's Committee of Moc Chau District. (2018). Reports on socioeconomic context in Moc Chau District. Retrieved from People's Committee of Moc Chau District.
- People's Committee of Muong Sang Commune. (2018). Reports on socioeconomic context in Muong Sang Commune. Retrieved from People's Committee of Muong Sang Commune.
- Pham, T.T., Bennett, K., Vu, T. P., Brunner, J., Le Ngoc, D., & Nguyen, D. T. (2013). Payments for forest environmental services in Vietnam: from policy to practice. CIFOR Occasional Paper, (93).
- Pham, T.T., Loft, L., Bennett, K., Phuong, V. T., & Brunner, J. (2015). Monitoring and evaluation of Payment for Forest Environmental Services in Vietnam: From myth to reality. Ecosystem services, 16, 220-229. doi: https://doi.org/10.1016/j.ecoser.2015.10.016
- Pham, T.T., Moeliono, M., Wong, G. Y., & Brockhaus, M. (2018). The politics of swidden: A case study from Nghe An and Son La in Vietnam. Land Use Policy. Rosa da Conceição, H., Börner, J., & Wunder, S. (2018). REDD+ as a public policy dilemma: understanding conflict and cooperation in the design of conservation incentives. Forests, 9(11), 725. doi: https://doi.org/10.1016/j.landusepol.2017.10.057
- Phạm, T.T., Đào, T.L.C., Hoàng, T.L., Nguyễn, Đ.T., Lê, M.T., Nông, H.H. và Đặng, T.N. 2018. Tác động của chi trả dịch vụ môi trường rừng (PFES) tại Sơn La, Việt Nam. Nghiên cứu chuyên đề 188. Bogor, Indonesia: CIFOR.
- Rose, N. (1991). Governing by Numbers: Figuring Out Democracy. Accounting, Organizations and Societyˆ, 16(7): 673-692.
- Sills E, Wendland KJ, Pattanayak SK, Cassingham K and Alger K. 2006. Watershed protection by forests: Vital ecosystem service or smoke and mirrors? Presentation, 3rd Chilean Congress of Forest Sciences, Concepcion, Chile
- Son Ha. (2019). Moc Chau (Son La): Illegal loggers raging, forest rangers powerless? Kinh Te Nong Thon Online Newspaper https://kinhtenongthon.vn/moc-chau-son-la-lam-tac-hoanh-hanh-kiem-lam-bat-luc-post26594.html.
- Son La Forest Protection and Development Fund. (2018). 10 years report on PFES implementation in Son La. Son La Forest Protection and Development Fund, Son La, Vietnam.
- Son La Forest Protection Department (2018). Reports on annual forest change for 2018. Retrieved from Son La Forest Protection Department.
- Son La Forest Protection Department (2019). Forest cover dataset. http://www.kiemlam.org.vn/Desktop.aspx/List/So-lieu-dien-bien-rung-hang-nam/NAM_2019/.
- Son La Statistic Department. (2016). Annual report on Son La Development. Son La, Vietnam.
- Son La Statistics Department. (2018). Statistical Yearbook of Son La. Retrieved from Son La Statistics Department.
- Sunderlin, W. D., Larson, A. M., Duchelle, A. E., Sills, E. O., Luttrell, C., Jagger, P., ... & Aryani, R. (2016). Technical guidelines for research on REDD+ subnational initiatives. CIFOR.
- Trædal, L. T., & Vedeld, P. O. (2017). Livelihoods and land uses in environmental policy approaches: The case of PFES and REDD+ in the Lam dong province of Vietnam. Forests, 8(2), 39. doi: https://doi.org/10.3390/f8020039
- Tran, T. T. H., Zeller, M., & Suhardiman, D. (2016). Payments for ecosystem services in Hoa Binh province, Vietnam: An institutional analysis. Ecosystem Services, 22, 83-93. doi: https://doi.org/10.1016/j.ecoser.2016.10.001
- Vedel, S. E., Jacobsen, J. B., & Thorsen, B. J. (2015). Forest owners' willingness to accept contracts for ecosystem service provision is sensitive to additionality. Ecological Economics, 113, 15-24. doi: https://doi.org/10.1016/j.ecolecon.2015.02.014
- Vietnam Administration of Forestry. (2013). News bulletin November 8, 2013. http://tongcuclamnghiep.gov.vn/LamNghiep/Index/diem-tin-ngay-08112013-1410.
- Wang, B., Niu, X., & Wei, W. (2020). National Forest Ecosystem Inventory System of China: Methodology and Applications. Forests, 11(7), 732. doi: https://doi.org/10.3390/f11070732
- Wichelns, D., Milan, F., Hoanh, C. T., & Phuong, N. D. (2016). Household opportunity costs of protecting and developing forest lands in Son La and Hoa Binh Provinces, Vietnam. International Journal of the Commons, 10(2), 902–928. doi: http://doi.org/10.18352/ijc.620
- Wunder, S, Ibarra, E and Bui, D.T. 2005. Payment is Good but Control is Better: Why Payments for Forest Environmental Services in Vietnam Have so far Remained Incipient. Bogor, Indonesia: Center for International Forestry Research
- Wunder, S. 2005. Payments for environmental services: Some nuts and bolts. CIFOR occasional paper 42. Bogor, Indonesia: Center for International Forestry Research.
- Wunder, S. (2007). The efficiency of payments for environmental services in tropical conservation. Conservation Biology, 21(1), 48-58. doi: https://doi.org/10.1111/j.1523-1739.2006.00559.x
References
Alonso, W. & Starr P. (1987). The politics of numbers. Russell Sage Foundation.
Angelsen, A. (2017). REDD+ as result‐based aid: General lessons and bilateral agreements of Norway. Review of Development Economics, 21(2), 237-264. doi: https://doi.org/10.1111/rode.12271
Bennett, K. (2010). Additionality: The next steps for ecosystem service markets. Duke Environmental Law & Policy Forum 20, 417-438.
Bos, A. B. (2020). Richting een verbeterde evaluatie van subnationale initiatieven die tropische ontbossing verminderen. Geo-Info, 17(2), 40-41.
Bottazzi, P., Wiik, E., Crespo, D., & Jones, J. P. (2018). Payment for environmental “self-service”: Exploring the links between Farmers' motivation and additionality in a conservation incentive programme in the Bolivian Andes. Ecological Economics 150, 11-23. doi: https://doi.org/10.1016/j.ecolecon.2018.03.032
Brockhaus, M., & Angelsen, A. (2012). Seeing REDD+ through 4Is: a political economy framework. Analysing REDD+: challenges and choices. Center for International Forestry Research, Bogor, Indonesia, 15-30.
De Sy, V., Herold, M., Brockhaus, M., Di Gregorio, M., & Ochieng, R. M. (2018). Information and policy change: Data on drivers can drive change–if used wisely. In Transforming REDD+, 55-66. Center for International Forestry Research (CIFOR).
Desrosières, A. (2010). La politique des grands nombres. Historie de la raison statistique. Paris: La Découverte.
Dung Minh. (2018). Planting fruit trees in Chieng Khua village. Translated from Trồng cây ăn quả ở xã Chiềng Khừa. Nhan Dan Online Newspaper. https://nhandan.com.vn/tin-tuc-kinh-te/trong-cay-an-qua-o-xa-chieng-khua-318536/.
Duong, N. T. & de Groot, W. T. (2018). Distributional risk in PFES: Exploring the concept in the Payment for Environmental Forest Services program, Vietnam. Forest Policy and Economics, 92, 22-32. doi: https://doi.org/10.1016/j.forpol.2018.03.008
Duong, N. T. & de Groot, W. T. (2020). The impact of payment for forest environmental services (PFES) on community-level forest management in Vietnam. Forest Policy and Economics, 113, 102135. doi: https://doi.org/10.1016/j.forpol.2020.102135
Eichelberger, L. (2012). sustainability and the politics of calculation: Technologies of 'safe water,' subject-making, and domination. Journal of Political Ecology, 19(1): 145-161.
Engel, S. (2016). The devil in the detail: a practical guide on designing payments for environmental services. International Review of Environmental and Resource Economics, 9(1-2), 131-177. doi: https://doi.org/10.1561/101.00000076
Gupta, A., Lövbrand, E., Turnhout, E., & Vijge, M. J. (2012). In pursuit of carbon accountability: the politics of REDD+ measuring, reporting and verification systems. Current Opinion in Environmental Sustainability, 4(6), 726-731. doi: https://doi.org/10.1016/j.cosust.2012.10.004
Gupta, A., Vijge, M. J., Turnhout, E., & Pistorius, T. (2014). Making REDD+ transparent: the politics of measuring, reporting and verification systems. In Transparency in global environmental governance: critical perspectives (pp. 181-20).
Hansen, M. C., P. V. Potapov, R. Moore, M. Hancher, S. A. Turubanova, A. Tyukavina, D. Thau, S. V. Stehman, S. J. Goetz, T. R. Loveland, A. Kommareddy, A. Egorov, L. Chini, C. O. Justice, and J. R. G. Townshend. (2016). “High-Resolution Global Maps of 21st-Century Forest Cover Change.” Science 342 (15 November): 850–53. Data available on-line from: http://earthenginepartners.appspot.com/science-2013-global-forest.
Hasan, S. S., Zhang, Y., Chu, X., & Teng, Y. (2019). The role of big data in China’s sustainable forest management. Forestry Economics Review.
Jebiwott, A. (2016). Forest cover change and ecosystem services of Katimok forest reserve, Baringo County, Kenya (Doctoral dissertation). Kenya: Egerton University.
Karsenty, A., Aubert, S., Brimont, L., Dutilly, C., Desbureaux, S., Ezzine de Blas, D., & Le Velly, G. (2017). The economic and legal sides of additionality in payments for environmental services. Environmental Policy and Governance, 27(5), 422-435. doi: https://doi.org/10.1002/eet.1770
Le Velly, G., & Dutilly, C. (2016). Evaluating payments for environmental services: Methodological challenges. PLOS One, 11(2), e0149374. doi: https://doi.org/10.1371/journal.pone.0149374
Mcgregor, Ja. (2007). Researching human well‐being: from concepts to methodology. In Gough I & Mcgregor J (Eds), Well‐being in developing countries: new approaches and research strategies (pp. 316– 350). Cambridge University Press.
Mohebalian, P. M., & Aguilar, F. X. (2016). Additionality and design of forest conservation programs: Insights from Ecuador's Socio Bosque Program. Forest Policy and Economics, 71, 103-114. doi: https://doi.org/10.1016/j.forpol.2015.08.002
Mùi Sơn & Minh Hải. (2019). Moc Chau - Son La: Lam forest blatantly destroyed Chieng Khua forest. Translated from Mộc Châu - Sơn La: Lâm tặc ngang nhiên tàn phá rừng Chiềng Khừa. Kien Thuc Online Newspaper. https://kienthuc.net.vn/xa-hoi/moc-chau-son-la-lam-tac-ngang-nhien-tan-pha-rung-chieng-khua-1209627.html.
Naeem, S., Ingram, J. C., Varga, A., Agardy, T., Barten, P., Bennett, G., Bloomgarden, E., Bremer, L.L., Burkill, P., Cattau, M., Ching, C., Colby†, M., Cook, D.C., Costanza, R., DeClerck, F., Freund, C., Gartner, T., Goldman-Benner, R., Gunderson, J., Jarrett, D., Kinzig, A.P, Kiss, A., Koontz, A., Kumar, P., Lasky, J.R., Masozera, M., Meyers, D., Milano, F., Naughton-Treves, L., Nichols, E., Olander, L., Olmsted, P., Perge, E., Perrings, C., Polasky, S., Potent, J., Prager, C., Quétier, F., Redford, K., Saterson†, K., Thoumi, G., Vargas, M.T., Vickerman, S., Weisser, W., Wilkie, D., Wunder, S. (2015). Get the science right when paying for nature's services. Science, 347(6227), 1206-1207. doi: https://doi.org/10.1126/science.aaa1403
Pagiola, S., Carrascosa von Glehn, H., & Taffarello, D. (2013). Brazil's experience with payments for environmental services. São Paulo: SMA/CBRN, 274.
People's Committee of Chieng Khua Commune. (2018). Reports on socioeconomic context in Chieng Khua Commune. Retrieved from People's Committee of Chieng Khua Commune.
People's Committee of Dong Sang Commune. (2018). Reports on socioeconomic context in Dong Sang Commune. Retrieved from People's Committee of Dong Sang Commune.
People's Committee of Moc Chau District. (2018). Reports on socioeconomic context in Moc Chau District. Retrieved from People's Committee of Moc Chau District.
People's Committee of Muong Sang Commune. (2018). Reports on socioeconomic context in Muong Sang Commune. Retrieved from People's Committee of Muong Sang Commune.
Pham, T.T., Bennett, K., Vu, T. P., Brunner, J., Le Ngoc, D., & Nguyen, D. T. (2013). Payments for forest environmental services in Vietnam: from policy to practice. CIFOR Occasional Paper, (93).
Pham, T.T., Loft, L., Bennett, K., Phuong, V. T., & Brunner, J. (2015). Monitoring and evaluation of Payment for Forest Environmental Services in Vietnam: From myth to reality. Ecosystem services, 16, 220-229. doi: https://doi.org/10.1016/j.ecoser.2015.10.016
Pham, T.T., Moeliono, M., Wong, G. Y., & Brockhaus, M. (2018). The politics of swidden: A case study from Nghe An and Son La in Vietnam. Land Use Policy. Rosa da Conceição, H., Börner, J., & Wunder, S. (2018). REDD+ as a public policy dilemma: understanding conflict and cooperation in the design of conservation incentives. Forests, 9(11), 725. doi: https://doi.org/10.1016/j.landusepol.2017.10.057
Phạm, T.T., Đào, T.L.C., Hoàng, T.L., Nguyễn, Đ.T., Lê, M.T., Nông, H.H. và Đặng, T.N. 2018. Tác động của chi trả dịch vụ môi trường rừng (PFES) tại Sơn La, Việt Nam. Nghiên cứu chuyên đề 188. Bogor, Indonesia: CIFOR.
Rose, N. (1991). Governing by Numbers: Figuring Out Democracy. Accounting, Organizations and Societyˆ, 16(7): 673-692.
Sills E, Wendland KJ, Pattanayak SK, Cassingham K and Alger K. 2006. Watershed protection by forests: Vital ecosystem service or smoke and mirrors? Presentation, 3rd Chilean Congress of Forest Sciences, Concepcion, Chile
Son Ha. (2019). Moc Chau (Son La): Illegal loggers raging, forest rangers powerless? Kinh Te Nong Thon Online Newspaper https://kinhtenongthon.vn/moc-chau-son-la-lam-tac-hoanh-hanh-kiem-lam-bat-luc-post26594.html.
Son La Forest Protection and Development Fund. (2018). 10 years report on PFES implementation in Son La. Son La Forest Protection and Development Fund, Son La, Vietnam.
Son La Forest Protection Department (2018). Reports on annual forest change for 2018. Retrieved from Son La Forest Protection Department.
Son La Forest Protection Department (2019). Forest cover dataset. http://www.kiemlam.org.vn/Desktop.aspx/List/So-lieu-dien-bien-rung-hang-nam/NAM_2019/.
Son La Statistic Department. (2016). Annual report on Son La Development. Son La, Vietnam.
Son La Statistics Department. (2018). Statistical Yearbook of Son La. Retrieved from Son La Statistics Department.
Sunderlin, W. D., Larson, A. M., Duchelle, A. E., Sills, E. O., Luttrell, C., Jagger, P., ... & Aryani, R. (2016). Technical guidelines for research on REDD+ subnational initiatives. CIFOR.
Trædal, L. T., & Vedeld, P. O. (2017). Livelihoods and land uses in environmental policy approaches: The case of PFES and REDD+ in the Lam dong province of Vietnam. Forests, 8(2), 39. doi: https://doi.org/10.3390/f8020039
Tran, T. T. H., Zeller, M., & Suhardiman, D. (2016). Payments for ecosystem services in Hoa Binh province, Vietnam: An institutional analysis. Ecosystem Services, 22, 83-93. doi: https://doi.org/10.1016/j.ecoser.2016.10.001
Vedel, S. E., Jacobsen, J. B., & Thorsen, B. J. (2015). Forest owners' willingness to accept contracts for ecosystem service provision is sensitive to additionality. Ecological Economics, 113, 15-24. doi: https://doi.org/10.1016/j.ecolecon.2015.02.014
Vietnam Administration of Forestry. (2013). News bulletin November 8, 2013. http://tongcuclamnghiep.gov.vn/LamNghiep/Index/diem-tin-ngay-08112013-1410.
Wang, B., Niu, X., & Wei, W. (2020). National Forest Ecosystem Inventory System of China: Methodology and Applications. Forests, 11(7), 732. doi: https://doi.org/10.3390/f11070732
Wichelns, D., Milan, F., Hoanh, C. T., & Phuong, N. D. (2016). Household opportunity costs of protecting and developing forest lands in Son La and Hoa Binh Provinces, Vietnam. International Journal of the Commons, 10(2), 902–928. doi: http://doi.org/10.18352/ijc.620
Wunder, S, Ibarra, E and Bui, D.T. 2005. Payment is Good but Control is Better: Why Payments for Forest Environmental Services in Vietnam Have so far Remained Incipient. Bogor, Indonesia: Center for International Forestry Research
Wunder, S. 2005. Payments for environmental services: Some nuts and bolts. CIFOR occasional paper 42. Bogor, Indonesia: Center for International Forestry Research.
Wunder, S. (2007). The efficiency of payments for environmental services in tropical conservation. Conservation Biology, 21(1), 48-58. doi: https://doi.org/10.1111/j.1523-1739.2006.00559.x