Instituto Socioambiental ISA

Brasília, Brazil

Instituto Socioambiental ISA

Brasília, Brazil
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Walker W.,Woods Hole Oceanographic Institution | Baccini A.,Woods Hole Oceanographic Institution | Schwartzman S.,Environmental Defense Fund EDF | Rios S.,Instituto Del Bien Comun IBC | And 9 more authors.
Carbon Management | Year: 2014

Carbon sequestration is a widely acknowledged and increasingly valued function of tropical forest ecosystems; however, until recently, the information needed to assess the carbon storage capacity of Amazonian indigenous territories (ITs) and protected natural areas (PNAs) in a global context remained either lacking or out of reach. Here, as part of a novel north-south collaboration among Amazonian indigenous and non-governmental organization (NGO) networks, scientists and policy experts, we show that the nine-nation network of nearly 3000 ITs and PNAs stores more carbon above ground than all of the Democratic Republic of the Congo and Indonesia combined, and, despite the ostensibly secure status of these cornerstones of Amazon conservation, a conservative risk assessment considering only ongoing and planned development projects puts nearly 20% of this carbon at risk, encompassing an area of tropical forest larger than that found in Colombia, Ecuador and Peru combined. International recognition of and renewed investment in these globally vital landscapes are therefore critical to ensuring their continued contribution to maintaining cultural identity, ecosystem integrity and climate stability. © 2015 Taylor & Francis.

Sanches R.A.,University of Campinas | Rossete A.N.,Mato Grosso State University | Rezende A.C.P.,Instituto Socioambiental ISA | Alves H.Q.,Instituto Socioambiental ISA | Villas-Boas A.,Instituto Socioambiental ISA
Revista Arvore | Year: 2012

The Suiá-Miçu Basin (BHSM) is an important Xingu River tributary, in the Amazon Basin, comprised of 2.36 millions hectare of ha in the Parecis Plateau, State of Mato Grosso. It encompasses the savannah, the tropical rainforest and the seasonal evergreen forest, whose composition of species reflect the rainfall and the high seasonality. The objective of this work was to characterize the BHSM floodplain areas, and their role for the environmental preservation. The georeferencing of CBERS-2 satellite images (2006) resulted in a RGB234 mosaic with 20 meters of resolution for mapping BHSM drainages. This mosaic allowed to map all drains of the BHSM, therefore, defining the flooded areas, complemented by crossing the hydrography and geomorphological maps as well as the field works. The results point out an area with more than 192,000 hectares, of which approximately 13% were deforested mainly for agricultural uses. The BHSM wetland areas have an important role in supplying water during the dry seasons. They are composed of fluvio-lacustrine habitats and vegetation diversity as native grassland, flooded forests and veredas (swamp Mauritia flexuosa dominant palms). In Brazil, despite having environmental legislation to fully protect the river and its marginal lands, it is of prime importance to monitor these areas, due to ecosystems fragility found in the BHSM floodplain. Therefore, we recommend more scientifically studies on these ecosystems to carry out decision-making on Brazilian wetland protection areas.

Costa J.N.M.N.,Instituto Socioambiental ISA | Durigan G.,Instituto Florestal
Revista Arvore | Year: 2010

(Leucaena leucocephala (Lam.) de Wit (Fabaceae): invader or ruderal?) Exotic species have not been recommended for degraded lands reforestation, since they are reported to invade natural ecosystems in the surrounding areas. Leucena leucocephala, a leguminous N fixing species, was introduced in Brazil and has been widely cultivated, especially to recover degraded soils. The potential of L. leucocephala to expand over the landscape and its persistence in the plant community in the long term was analyzed. A stand planted in 1983 was assessed, which was installed on a rocky soil, immerse in an agricultural matrix, where some native and planted forest patches exists. Over a 200 ha area, eleven distinct patches were surveyed, where all individuals from arboreal species (minimum height 50 cm) were identified and measured (dbh), to verify if the exotic species is expanding over areas where it has not been planted. In the stand where the species was planted, the community structure was assessed on the basis of relative density in size classes to verify if the proportion of the exotic species tends to increase with time, confirming persistence. Since, among the total of 4,599 individuals surveyed, not even a single individual of the species was recorded beyond the limits of the planted stand, invasion of natural ecosystems by Leucena leucocephala was refuted, the species being locally considered as ruderal. Even though a huge number of young individuals of L. leucocephala are regenerating under the planted trees, the relative density of the exotic species in the understorey tends to decrease with time. Apparently, some shade tolerant native species can slowly dominate the community in the future, taking advantage under light competition.

Santilli J.,Instituto Socioambiental ISA
Journal of Sustainable Forestry | Year: 2010

One of the key factors enabling integration and participation of local communities in conservation policies is the legal foundation for this relationship. Brazilian law has developed novel solutions to reconcile the presence of local communities and traditional populations with environmental conservation in protected areas. The logic underlying the law that created the National System of Conservation Units (Law 9985/2000) rests on the valuation of both biodiversity and of the cultural diversity associated with that biodiversity. © Taylor & Francis Group, LLC.

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