Projections of Land-Cover Change in a Tropical High-Andean Lake
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Land use and land cover change is one of the main drivers transforming high Andean ecosystems in Colombia. This study examines the spatial dynamics of land use in the La Cocha Ramsar Wetland between 1989 and 2020 and projects land cover scenarios to the year 2050 using spatial modeling techniques. Land cover maps for 1989 and 2020 were developed using satellite imagery and photo-interpretation, following the CORINE Land Cover methodology adapted for Colombia. A transition matrix and change indicators defined by the Institute of Hydrology, Meteorology and Environmental Studies (IDEAM) were used for multitemporal analysis, allowing the identification of processes such as forest fragmentation and recovery, agricultural expansion, and the spread of pastures. Future projections were modeled with the Land Change Modeler (LCM) module in the IDRISI Selva software, incorporating biophysical and socioeconomic variables with significant association (Cramér’s V > 0.4). Eight dominant transitions were identified, and change potential maps were generated. The model was validated through random field sampling and a confusion matrix analysis, yielding a Kappa index of 0.76, indicating strong agreement between simulated and observed data. Results show that 91.06% of the area remained unchanged, while 8.94% underwent transformations attributed to human activities. A net increase of 66.75 ha in dense forest is projected by 2050, along with growth in fragmented forest areas and agro-pastoral mosaics.
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[1] Patiño-Gutiérrez, S. E., Domínguez-Rivera, I. C., Daza-Torrez, M. C., Ochoa-Tocachi, B. F., & Oviedo-Ocaña, E. R. (2024). Effects of rainfall seasonality and land use change on soil hydrophysical properties of high-Andean dry páramo grasslands. Catena, 238, 107866. doi:10.1016/j.catena.2024.107866.
[2] Buitrago, P. V., & De Pellegrin Llorente, I. (2025). A systematic review of ecosystem services in the Rabanal páramo (Colombia). Integrated Environmental Assessment and Management, 21(3), 485–495. doi:10.1093/inteam/vjae029.
[3] Murad, C. A., Pearse, J., & Huguet, C. (2024). Multitemporal monitoring of paramos as critical water sources in Central Colombia. Scientific Reports, 14(1), 16706. doi:10.1038/s41598-024-67563-z.
[4] Brück, S. A., Torres, B. D. M., & de Moraes Polizeli, M. de L. T. (2023). The Ecuadorian paramo in danger: What we know and what might be learned from northern wetlands. Global Ecology and Conservation, 47, 2639. doi:10.1016/j.gecco.2023.e02639.
[5] Rey-Romero, D. C., Domínguez, I., & Oviedo-Ocaña, E. R. (2022). Effect of agricultural activities on surface water quality from páramo ecosystems. Environmental Science and Pollution Research, 29(55), 83169–83190. doi:10.1007/s11356-022-21709-6.
[6] Brockerhoff, E. G., Barbaro, L., Castagneyrol, B., Forrester, D. I., Gardiner, B., González-Olabarria, J. R., Lyver, P. O. B., Meurisse, N., Oxbrough, A., Taki, H., Thompson, I. D., van der Plas, F., & Jactel, H. (2017). Forest biodiversity, ecosystem functioning and the provision of ecosystem services. Biodiversity and Conservation, 26(13), 3005–3035. doi:10.1007/s10531-017-1453-2.
[7] Velasco-Linares, P., & Vargas, O. (2008). Problems of high Andean forests. Strategies for the ecological restoration of high Andean forests. Estrategias para la restauración ecológica del bosque altoandino: el caso de la Reserva Forestal Municipal de Cogua: Universidad Nacional de Colombia, Cundinamarca, Bogotá, Colombia. (In Spanish).
[8] WWF. (2024). Deforestation in Colombia in 2023: the lowest figure in 23 years. Worldwide Fund for Nature (WWF), Gland, Switzerland. Available online: https://www.wwf.org.co/?389691/Deforestacion-Colombia-2023-informe-cifras-y-causas (accessed on July 2025). (In Spanish).
[9] Anagonou, S. P. G., Ewemoje, T. A., Toyi, S. S. M., & Olubode, O. S. (2023). Landscape ecological risk assessment and transformation processes in the Guinean-Congolese climate zone in Benin Republic. Remote Sensing Applications: Society and Environment, 31, 100985. doi:10.1016/j.rsase.2023.100985.
[10] República de Colombia, Ministerio del Medio Ambiente, Consejo Nacional Ambiental. (2021). National Policy for Inland Wetlands of Colombia: Strategies for their Conservation and Rational Use. Ministerio del Medio Ambiente, Bogotá, Colombia. (In Spanish).
[11] Rodríguez, J. P., Karim Senhadji-Navarro, K., & Ruiz Ochoa, M. A. (2017). Ecological Status of Some Colombian Wetlands Over the Last 15 Years: A Prospective Assessment. Colombia Forestal, 20(2), 181. doi:10.14483/udistrital.jour.colomb.for.2017.2.a07 (In Spanish).
[12] ADC. (2023). Report: Case study, impact assessment of WWF-ADC projects in La Cocha Lagoon, a wetland of international Ramsar importance, Pasto, Nariño, Colombia. Recopilación histórica del proceso de la declaratoria de La Cocha como humedal Ramsar. (In Spanish).
[13] Pantoja, C. D. S., & De Los Ríos Cardona, J. C. (2024). Eco-governmentality, conservation areas, and indigenous autonomy. Quillasinga perspective in La Cocha Lagoon, Colombia. Bitacora Urbano Territorial, 34(3), 141–155. doi:10.15446/bitacora.v34n3.113556.
[14] CNTI. (2021). Alert over the degradation of La Cocha Lagoon in Pasto and death threats against the Indigenous governor Braulio Andrés Hidalgo. Comisión Nacional de Territorios Indígenas (CNTI), Bogotá, Colombia. Available online: https://www.cntindigena.org/alerta-por-la-degradacion-de-la-laguna-de-la-cocha-en-pasto-y-por-las-amenazas-de-muerte-contra-el-gobernador-indigena-braulio-andres-hidalgo/ (accessed on August 2025). (In Spanish).
[15] López Martínez, M. L., & Madroñero Palacios, S. M. (2015). Trophic state of a high-mountain tropical lake: Case of Laguna de la Cocha. Ciencia e Ingeniería Neogranadina, 25(2), 21. doi:10.18359/rcin.1430.
[16] Arias-Muñoz, P., Saz, M. Á., & Escolano, S. (2024). Trends of land use and land cover change in the upper-middle Mira basin in Ecuador. Investigaciones Geograficas, 81, 155–179. doi:10.14198/INGEO.25248.
[17] Verburg, P.H., Kok, K., Pontius, R.G., & Veldkamp, A. (2006). Modeling Land-Use and Land-Cover Change. Land-Use and Land-Cover Change. Global Change - The IGBP Series. Springer, Berlin, Germany. doi:10.1007/3-540-32202-7_5.
[18] Armenteras, D., Murcia, U., González, T. M., Barón, O. J., & Arias, J. E. (2019). Scenarios of land use and land cover change for NW Amazonia: Impact on forest intactness. Global Ecology and Conservation, 17, 5–67,. doi:10.1016/j.gecco.2019.e00567.
[19] GOV.CO. (2025). Environmental management plan for the Ramsar La Cocha wetland, 2011. Ministerio de Ambiente y Desarrollo Sostenible, Bogotá, Colombia. Available online: https://www.minambiente.gov.co/direccion-de-bosques-biodiversidad-y-servicios-ecosistemicos/humedales-ramsar/ (accessed on August 2025). (In Spanish).
[20] Munévar, M. V. W. (2010). What is governance and what is it for?. Revista Análisis Internacional (Cesada a partir de 2015), (2), 219-236. (In Spanish).
[21] Muñoz Guerrero, D. A. (2017). Landscape transformations and prospects in the Paja Blanca Páramo, Nariño, Colombia. Perspectiva Geográfica, 22(2), 47–66. doi:10.19053/01233769.7598.
[22] Leta, M. K., Demissie, T. A., & Tränckner, J. (2021). Modeling and prediction of land use land cover change dynamics based on land change modeler (Lcm) in Nashe watershed, upper blue Nile basin, Ethiopia. Sustainability (Switzerland), 13(7), 1–24,. doi:10.3390/su13073740.
[23] Ceballos Freire, Á. J., Muñoz Guerrero, D. A., Apraez Muñoz, J. J., & De la Cruz Pinta, M. (2024). Prospective proposals for land cover change in the La Rasta micro-basin, Imués municipality, Nariño. Ciencia e Ingeniería Neogranadina, 34(1), 83–104. doi:10.18359/rcin.7261.
[24] WWF. (2002). Management Plan for the Andean-Amazonian Corridor of the Bordoncillo Paramo – Cerro de Patascoy, La Cocha. Corporación Autónoma Regional de Nariño, Corporación para el Desarrollo Sostenible del Sur de la Amazonía. Worldwide Fund for Nature – WWF, and Asociación para el Desarrollo Campesino – ADC, Worldwide Fund for Nature (WWF), Gland, Switzerland. (In Spanish).
[25] Obando-Cabrera, L., Díaz-Timoté, J. J., Bastarrika, A., Celis, N., & Hantson, S. (2025). The Paramo Fire Atlas: quantifying burned area and trends across the Tropical Andes. Environmental Research Letters, 20(5), 54019. doi:10.1088/1748-9326/adc8ba.
[26] Ardila, N. J. M., & García, U. G. M. (2010). National land cover legend: CORINE Land Cover methodology adapted for Colombia: scale 1:100.00. Instituto de Hidrología, Meteorología y Estudios Ambientales, Bogotá, Colombia. (In Spanish).
[27] Posada, E., Ramírez, H., & Espejo, N. (2012). Remote Sensing Practice Manual with ERDAS IMAGINE 2011 Software. Instituto Geográfico Agustín Codazzi (IGAC), Bogotá, Colombia. (In Spanish).
[28] Burbano-Giróna, J., Berbeoa, M. A. M., Montoyaa, C. G., Cruz-Rodrígueza, C. A., & Ochoa-Quinteroa, J. M. (2012). Conservation status of the Páramos in Colombia. Fuentes, 2002(2009). (In Spanish).
[29] IDEAM. (2019). Dynamics of land cover change (Periods 2000-2002, 2005-2009 and 2010-2012). Subdirección de Ecosistemas e Información Ambiental, Bogotá, Colombia. (In Spanish).
[30] Eastman, J. R. (2012) IDRISI Selva Tutorial. Clark University, Worcester, United States.
[31] Abuelaish, B., & Olmedo, M. T. C. (2016). Scenario of land use and land cover change in the Gaza Strip using remote sensing and GIS models. Arabian Journal of Geosciences, 9(4). doi:10.1007/s12517-015-2292-7.
[32] Clark Labs. (2017). TerrSet Geospatial Monitoring and Modeling System: User’s Guide. Clark University, Worcester, United States.
[33] Pontius, G. R., & Malanson, J. (2005). Comparison of the structure and accuracy of two land change models. International Journal of Geographical Information Science, 19(2), 243–265. doi:10.1080/13658810410001713434.
[34] Sari, E., Winoto, J., Soetarto, E., Asikin, Z., Ayu, S. F., & Nauly, M. (2024). Livelihood Vulnerability Index of Resettled Peasants Displaced by Land Acquisition of An Airport. Journal of Human, Earth, and Future, 5(4), 629–642. doi:10.28991/HEF-2024-05-04-07.
[35] Suárez, M. Martínez, M., Solarte, M. E., Patiño, A. L., Baca Gamboa, A., & Cabrera, M. (2024). Representative flora of the páramos of the department of Nariño. Editorial Universidad de Nariño, San Juan de Pasto, Colombia. (In Spanish).
[36] Rosero López, J. C. (2024). Audiovisual ethnography: Identity and food practices of the inhabitants of the La Cocha Nature Reserve "La casa del Búho" in Nariño, Colombia. Master Thesis, Flacso Ecuador, Quito, Ecuador. (In Spanish).
[37] Cuaspa Calvache, G. S & Escobar Bolaños, M. S. (2022). Evaluation of changes in the physicochemical properties of soils due to socioeconomic activities on the banks of La Cocha Lagoon, El Motilón village, municipality of Pasto. Undergraduate thesis, Environmental Engineering Program, Faculty of Engineering, Universidad Mariana, San Juan de Pasto, Colombia, (In Spanish).
[38] Dragan, R. (2020). Soil Considerations for Water Management. Available online: https://es.rivulis.com/consideraciones-del-suelo-para-la-administracion-del-agua/ (accessed on August 2025). (In Spanish).
[39] Landis, J. R., & Koch, G. G. (1977). The Measurement of Observer Agreement for Categorical Data. Biometrics, 33(1), 159. doi:10.2307/2529310.
[40] DANE (2020). Encuesta Nacional Agropecuaria – ENA (2012 – 2019). Departamento Administrativo Nacional de Estadística, Bogotá, Colombia.
[41] Gobernación de Nariño. (2020). Plan departamental de extensión agropecuaria 2020 – 2023. Gobernación de Nariño, Pasto, Colombia. (In Spanish).
[42] FAO. (2021). Food and Agriculture Organization and Agencia de Desarrollo Rural, Plan integral de desarrollo agropecuario y rural con enfoque territorial, Vol. II. FAO, Bogotá, Colombia.
[43] Ministerio del Medio Ambiente. (2020). RAMSAR Wetlands Fact Sheet. Laguna de la Cocha. Ministerio del Medio Ambiente, Bogotá, Colombia. (In Spanish).
[44] Ramírez-Padilla, B., Urbano-Apraez, S. M., & González-Insuasti, M. S. (2015). Generic vascular flora of the upper Guamués Basin (La Cocha), Nariño, Colombia. Editorial Universitaria-Universidad de Nariño. Pasto, Colombia. (In Spanish).
[45] IAvH (2004). Instituto Alexander Von Humboldt, WWF Colombia, and Asociación para el Desarrollo Campesino. Incentive Project for La Cocha Lagoon as a RAMSAR Site. Available online: https://rsis.ramsar.org/ris/1047 (accessed on August 2025).
[46] González, J. C. (2018). Characterization of the main causes and agents of deforestation at the national level, period 2005–2015. Food and Agriculture Organization (FAO), Rome, Italy. (In Spanish).
[47] Global Forest Watch. (2025). Forest monitoring. Global Forest Watch, Washington, United States. Available online: https://www.globalforestwatch.org/dashboards/country/COL/?category=summary (accessed on August 2025).
[48] Palacios Saavedra, N., & Chamorro Velasco, L. (2020). Identification of Actions to Minimize the Impact of Deforestation Generated by Carbonization in the Township of El Encano, Municipality of Pasto (Nariño). (In Spanish).
[49] Jurado Gamez, O. J. (2021). Eco-pedagogical strategies to reduce environmental damage caused by human activity in the district of Encanto, municipality of Pasto, department of Nariño. Master Thesis, Universidad de Manizales, Manizales, Colombia. Available online: https://ridum.umanizales.edu.co/handle/20.500.12746/4796 (accessed on August 2025). (In Spanish).
[50] Tulcán, J. R. (2023). Analysis of vegetation cover change and future projections in the Angochagua parish. Bachelor Thesis, Universidad Técnica del Norte, Ibarra, Ecuador. (In Spanish).
[51] Agencia de Noticias UNAL. (2024). Satellite images monitor forest loss in Nariño. Universidad Nacional de Colombia, Bogotá, Colombia. Available online: https://agenciadenoticias.unal.edu.co/detalle/con-imagenes-satelitales-monitorean-perdida-de-bosque-en-narino (accessed on August 2025). (In Spanish)
[52] Bastidas, E. J. (2020). Economic alternatives that allow environmental conservation for the inhabitants of the El Encano district. Revista Investigium IRE Ciencias Sociales y Humanas, 11(1), 58–68. doi:10.15658/investigiumire.201101.05. (In Spanish).
[53] Jojoa-Botina, D. A., & Cerón-Rengifo, C. P. (2022). La Cocha Lagoon in Development Discourses: Guamués Multipurpose Project, Colombia, 1995-2002. Sociedad y Economía, 46, e10511137. doi:10.25100/sye.v0i46.11137.
[54] Luna Hernández, S. M., & Madroñero Palacios, S. M. (2015). Importance of the social component in water resource management, El Encano River, La Cocha Ramsar wetland (Nariño, Colombia). Luna Azul, 42, 200–216. doi:10.17151/luaz.2016.42.13. (In Spanish).
[55] Duque, O. (1999). Environmental Land Use Planning: Between Lifestyle Choices and Political Decisions. Asociación para el Desarrollo Campesino, Pasto, Colombia. (In Spanish).
[56] WWF. (2010). Farmers from La Cocha lagoon (Nariño) win international award. Worldwide Fund for Nature (WWF), Gland, Switzerland. (In Spanish). Available online: https://www.wwf.org.co/?196271/Campesinos-de-laguna-de-La-Cocha-Nario-ganan-premio-internacional (accessed on August 2025).
[57] Parques Nacionales Naturales. (2015). Corota Island Flora Sanctuary. (In Spanish).
[58] Corporación Autónoma Regional de Nariño. (2021). Environmental determinants for territorial planning in the department of Nariño. Corponariño, Pasto, Colombia. (In Spanish).
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