Cloud forest in the Central Highlands of Guatemala provides important ecosystem services for the Q'eqchi' Maya but has been disappearing at an increasing rate in recent decades. This research documents changes in cloud forest cover, explores some contributing factors to deforestation, and considers forest preservation and food security implications for Q'eqchi' communities. We used a transdisciplinary framework that synthesized remote sensing/GIS analysis of land cover change, focus group dialogs, and surveys. Expansion of subsistence agriculture is a key proximate cause of cloud forest removal, followed by extraction of fuelwood and larger-scale logging operations. Predisposing environmental factors such as rugged topography, steep slopes, and poor soils contribute to low agricultural productivity that contributes to increased conversion of forest to agricultural land. The key underlying driving forces for deforestation locally are population growth and subdivision of land. Population growth is increasing the demand for agricultural land and, as a result, the Q'eqchi' clear the forest to meet the need for increased food production. Furthermore, population growth is driving subdivision of land, decreasing fallow periods, and putting additional strain on poor soils, all of which exacerbate land degradation. Given the increase in population in the region, food production must be improved on existing agricultural land to avoid the need to put more land into production to meet food requirements. Thus, efforts to sustainably increase agricultural productivity are fundamental to efforts to conserve the cloud forest and to safeguard essential ecosystem services.

Anthropogenic forces that alter the physical landscape are known to cause significant soil erosion, which has negative impact on surface water bodies, such as rivers, lakes/reservoirs, and coastal zones, and thus sediment control has become one of the central aspects of catchment management planning. The revised universal soil loss equation empirical model, erosion pins, and isotopic sediment core analyses were used to evaluate watershed erosion, stream bank erosion, and reservoir sediment accumulation rates for Ni Reservoir, in central Virginia. Land-use and land cover seems to be dominant control in watershed soil erosion, with barren land and human-disturbed areas contributing the most sediment, and forest and herbaceous areas contributing the least. Results show a 7 % increase in human development from 2001 (14 %) to 2009 (21.6 %), corresponding to an increase in soil loss of 0.82 Mg ha(-1) year(-1) in the same time period. (210)Pb-based sediment accumulation rates at three locations in Ni Reservoir were 1.020, 0.364, and 0.543 g cm(-2) year(-1) respectively, indicating that sediment accumulation and distribution in the reservoir is influenced by reservoir configuration and significant contributions from bedload. All three locations indicate an increase in modern sediment accumulation rates. Erosion pin results show variability in stream bank erosion with values ranging from 4.7 to 11.3 cm year(-1). These results indicate that urban growth and the decline in vegetative cover has increased sediment fluxes from the watershed and poses a significant threat to the long-term sustainability of the Ni Reservoir as urbanization continues to increase.

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