Desertification
is one the most significant environmental problems in drylands
of the world. This is the case in Mexico where fifty percent of its
territory is drylands, which is home to 60% of the
country's population. High variability in rainfall, coupled with increasing
livestock numbers, have caused severe deterioration of plant cover, soil
structure and the water retention capacity of drylands,
resulting in increased run-off and, hence, increased water loss and gully
formation. The aim of our study was to apply the DDP, which is a holistic
framework to address the inherent complexity of desertified
landscapes, by identifying how key socioeconomic drivers interact with
hydrological variables in a rural community in Central Mexico. The study system is characterized by patches of pine-oak
forest, rangeland and rain-fed agriculture. We examined how water inputs and
outputs differed for three land-use types and how humans have adapted to
changing hydrology in this landscape. We monitored precipitation and run-off at
10 sites in each land-use type and determined the proportion of plant and soil
cover at each site. With participatory methods, we explored the community
perception of climate change, soil water erosion and gully formation. Where
plant cover (mainly perennial grasses) was £10%, run-off was more than double that of adjacent forests and
agricultural land (P<0.0001). Taking advantage of economic incentives
provided by government to augment livestock production, the La Amapola
community increased water collection tanks at the base of a number of these
emerging gully systems. In efforts to mitigate and restore degraded rangelands
in this dynamic system, adaptive capacities, emerging opportunities and complex
feedbacks within the landscape must be considered.