Affiliation:
1. Instituto de Proyección Regional y Educación a Distancia (IPRED) Universidad Industrial de Santander ‐ sede Málaga Cl. 20 No 6‐20 Málaga Colombia
2. Departamento de Ciencias Forestales, Grupo de Investigación en Restauración Ecológica de Tierras Degradadas en el Trópico Universidad Nacional de Colombia sede Medellín Cra 65 No 59A ‐ 110 Medellín Colombia
3. Grupo de Investigación en Ecología Aplicada. Escuela Ambiental, Facultad de Ingeniería Universidad de Antioquia Cl. 67 No 53‐108 Medellín Colombia
4. Departamento de Ciencias Agronómicas Universidad Nacional de Colombia sede Medellín Cra 65 No 59A – 110 Medellín Colombia
Abstract
AbstractThe functioning of tropical montane ecosystems are key provider of environmental services. However, climate and land use change interactively affect the ecohydrological and biogeochemical processes that support the provision of such services. We evaluate the effect of land use/land coverand the seasonality and intensity of the rainfall on the ecological functions of erosion control and nutrient regulation in a gradient of human intervention in the Central Andes of Colombia. Our results show that soil erosion (kg/ha/year) was higher in the transitory crop (187.7), followed by the permanent crop (98.2), and much lower in the pasture (8.0) and native forest (7.2). Our results also indicate a differential effect of land use and rainfall seasonality on erosion and nutrient transport, both processes being significantly higher in crops and lower in forest, both for the wet and dry seasons. However, the relationships between erosion and rainfall intensity varied depending on the hydrological season (in the wet seasons, no linear model was significant, while in the dry seasons, linear models for maximum rainfall intensity were significant in both crops and in the oak forest, and linear models with mean intensity were significant for both types of crops). Nitrogen exhibited the highest rates of transport, which can have important implications for water and soil pollution. Nitrogen transport via erosion (g/ha/year) was consistent with erosion results, being higher in the transitory crop (399.9) and permanent crop (265.3) that in the oak forest (6.9) and pasture (6.8). These results indicate that converting forests affects the capacity of ecosystems to provide environmental services, which is further amplified by projections of climate change.
Funder
Departamento Administrativo de Ciencia, Tecnología e Innovación
Subject
Earth-Surface Processes,Ecology,Aquatic Science,Ecology, Evolution, Behavior and Systematics
Cited by
1 articles.
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