Abstract
Silvopastoral systems—the management of trees within pastures from natural regeneration or planting—are a strategy to promote sustainable livestock systems and ecosystems services. Timber is one of the products from these systems with potential to increase family revenues. The management of natural regeneration and population dynamics of trees is a feasible way to harvest timber and maintain environmental services. In this research, we modeled the population dynamics of Pinus oocarpa and Tabebuia rosea, two important timber species of silvopastoral systems in Central America. The results showed that farmers manage a significant density of different tree species from natural regeneration. However, only the species with well-known uses or desired services are allowed to remain. The natural regeneration is more impressive in silvopastoral systems with natural grass than those with exotic grass. Farming practices, for instance use of fire for weed control, are the main reasons for low rates of natural regeneration in pastures with exotic grass. The models of population dynamics for both species showed that the sustainable timber harvest plans are a viable activity in pasturelands under natural-regeneration management plans. Innovative farmers are willing to adopt silvicultural practices and management of population dynamics to increase timber revenues and sustainability if forestry regulations for sustainable use of trees in farms are simplified.
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Acknowledgments
This research was sponsored by the Ministry of Foreign Affairs of Finland through the Finnfor Project (CATIE, Costa Rica) and Natura Inovação e Tecnologia de Produtos (Brazil) through the "Programa Natura Campus". We would like to thank the farmers and field technicians for their contributions in the establishment of the Permanent Sample Plots and data collection. Professor Eduardo Somarriba and Rolando Cerda provided support in population dynamics modeling. Anonymous reviewers provided useful recommendations that improved the quality of the paper.
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de Sousa, K., Detlefsen, G., Tobar, D. et al. Population dynamic and management of Pinus oocarpa and Tabebuia rosea within silvopastoral systems in Central America. Agroforest Syst 91, 1119–1127 (2017). https://doi.org/10.1007/s10457-016-9988-x
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DOI: https://doi.org/10.1007/s10457-016-9988-x