Riparian forest potential to retain sediment and carbon evaluated by the 137 Cs fallout and carbon isotopic ratio techniques
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Data
2009
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Resumo
Riparian forests can provide an important service for aquatic ecosystems by sequestering hillslope-derived sediments.
However, the width of a riparian buffer zone required to filter sediments is not yet well-understood. Here are used two
complementary tracers to measure sediment retention. The 137 Cs technique and the soil carbon isotopic ratios (δ 13 C)
are utilized to investigate sediment deposition and erosion rates on a slope transect cultivated with sugarcane followed
by a secondary riparian forest zone in Iracemápolis, State of São Paulo, Brazil. The 137 Cs technique and the δ 13 C
analysis showed that the width of a riparian vegetation in accordance to a Brazilian Environmental Law (N ◦ 4.771/65)
was not sufficient in trapping sediments coming from agricultural lands, but indicated the importance of these forests
as a conservation measure at the watershed scale. The complementary δ 13 C analysis together with soil morphology
aspects allowed a better interpretation of the sediment redistribution along the sugarcane and riparian forest transects.
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Erosion, Carbon, δ 13 C, Sugarcane, C 3 and C 4 plants, Erosão, δ 13 C, Cana-de-açúcar, Plantas C 3 e C 4, Carbono
Citação
PIRES, Luiz F.; BACCHI, Osny O. S.; CORRECHEL, Vladia; REICHARDT, Klaus; FILIPPE, Joseline. Riparian forest potential to retain sediment and carbon evaluated by the 137Cs fallout and carbon isotopic ratio techniques. Anais da Academia Brasileira de Ciências, Rio de Janeiro, v. 81, n. 2, p. 271-279, 2009.