Marino, Gustavo .
A case of participative research: The in situ conservation of Native Plus Trees in the Humid Chaco Forest Region (Argentina).
The Humid Chaco Forest in Argentine had been negatively affected by the deforestation and genetic erosion, due to land use changes and unsustainable logging of the more valuable species. Nonetheless, the Prosopis species are intensively used like primary source of foods and local furniture industry. Lastly, the value of native forests to prevent floods and regulate climatic conditions was also socially recognized. Hence, the role of forest genetic resources in sustaining the productive and protective values of native forests begin to be understood and in situ conservation efforts are dramatically required. In 2005, a local scale project devoted to native plus trees in situ conservation was started across an area of 500.000 ha of the Santa Fe State(www.fca.unl.edu.ar/arbolesnativos). Based on the ancient farmers-native trees relationship, a novel participative research was conducted following two main goals: (1) identify and select native plus trees and seed production areas and (2) produce and evaluate its germplasm. The univariate criteria for selection, usually based on morphology and resistance to pests and diseases, was translated in more rich multivariate criteria defined by local farmers. Attributes relative to multipurpose use, like fruit or forage production or flowering precocity, respectively related to livestock or honey production in native forest, were clearly remarked by farmers. After the revision of 1,200 native trees, a group of 410 individuals belonging to 15 native species and 14 seed production areas was selected and identified. After the fruit harvest, the seeds from 169 identified plus trees were manually obtained. Finally, the germination and weight of seeds were evaluated for 40 superior individuals and they mainly presented significant variation within Prosopis species (P 0.05). In addition to the catalogue and the germplasm bank created, the information produced could be crucial for the planning and successful execution of forest management programs.
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1 - Universidad Nacional del Litoral, Ciencias del Ambiente, Kreder 2805, Esperanza, Santa Fe, 3080, Argentina
Native plus trees
Humid Chaco Forest
in situ conservation
Presentation Type: Oral Paper:Papers for Topics
Location: PDR 4/Hilton
Date: Monday, July 9th, 2007
Time: 9:30 AM