Phosphorus limits and “planetary boundaries” approach applied to a case study in a tropical area
2019
Leal, Luisa Lima | Turetta, Ana Paula Dias | Sampaio, Michelle Cristina | Simões, Bruno Francisco Teixeira | Melo, Felipe Rafael Ribeiro | Donagemma, Guilherme Kangussu
The Atlantic Forest is a biome in the SE region of Brazil and is under pressure in terms of biological conservation, which can be considered as a global safeguarding priority. Some areas of this biome present limitations of agricultural use, such as low soil fertility and high susceptibility to erosion. There is risk of eutrophication from runoff, especially in areas with rugged relief and soils with intense phosphate fertilization. The “Planetary Boundaries” approach proposes a safe and fair operating buffer for humanity to continue to develop without an adverse impact on planetary systems. We evaluated the P-level distribution according to soil and land use classes in a watershed under agricultural use in the Atlantic Forest biome in the State of Rio de Janeiro State, Brazil. We also used the Planetary Boundaries approach to check the P sustainability thresholds, which showed to be sensitive to land use and cover classes.
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