Colombian mountain Páramos are considered natural areas with a very important role for human life. Páramos provide, both in mountain and lowland areas, a multitude of ecosystem services which start from vegetation to soil sustainability. The sustainability of Páramos is however impaired by several anthropogenic activities, including agricultural and livestock practices. A system thinking approach was applied in this work to improve the systemic understanding of factors affecting sustainability and resilience of Páramos agro-ecosystems. Interdisciplinary literature evidences were summarized and conceptually analyzed in order to develop causal loop diagrams of Páramo system structures allowing describing the main feedback loops involving (involved in/connecting) the Páramo ecosystem and driving its sustainability. From the causal diagram analysis few insights to maintain the human presence in Páramos arose. The system analysis highlights that human presence in Páramos should be stimulated, avoiding agriculture and livestock activities as the main income source. Particularly, social interactions, education on the Páramos environmental and relevance of agricultural practices to foster ecosystem services and multiple rentable economic activities should be enhanced. The study also includes the role of the government in providing the Páramo inhabitants with payments for ecosystem services and environmental education aimed to boost sustainability. Sustainable Páramo management will apply specific leverages on the system to reach Sustainable Development Goals 6 (water), 8 (economic growth, employment and work), 13 (climate change), and 15 (sustainable use of terrestrial ecosystems) of the Agenda 2030.

<p>La producción lechera ha sido una de las grandes áreas del desarrollo de la Zootecnia. En ella se reúne el mejoramiento genético, logros en la producción de leche, disposición de la ubre, velocidad de ordeño, variación en la composición química, rendimiento lácteo en subproductos; así mismo, el avance en la nutrición para atender los<br />requerimientos de los altos volúmenes de leche, evolución en los sistemas de producción, innovaciones tecnológicas en el ordeño, higienización y aseguramiento de calidad, uso de biotecnologías para la optimización de la producción y la reproducción, generación de nuevas razas y estudio de posibles bondades productivas de recursos<br />genéticos locales. El objetivo de este documento es: en los ochenta años de la Facultad de Ciencias Agropecuarias, presentar una breve sinopsis de la producción lechera, como un homenaje a los profesionales y productores que han participado en su desarrollo, en especial de los grupos raciales bovinos Lucerna y Hartón del Valle.</p>