Late Pleistocene and Holocene vegetation changes in northeastern Brazil determined from carbon isotopes and charcoal records in soils

Pessenda, Luiz Carlos Ruiz; Gouveia, Susy Eli Marques; Ribeiro, Adauto de Souza; Oliveira, Paulo Eduardo de; Aravena, Ramón

doi:10.1016/j.palaeo.2010.09.008

Cited by 100 publications

(65 citation statements)

References 40 publications

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“…Long-term soil residence of biochar in the soil is due to the recalcitrance of biochar C. Pyrolytic C is known to have long residence times in the soil, extending millennia (Gavin et al 2003;Gouveia et al 2002;Pessenda et al 2010). Greater condensed aromatic character of biochar C increases its resistance to oxidation (Ascough et al 2011) and non-protonated aromatic C has been found to be a large fraction of C in biochar recovered from Terra Preta and Iowa Endoaquoll soils (Mao et al 2012).…”

Section: Potential Of Biochar To Reduce Anionic Nutrient Leaching Losmentioning

confidence: 99%

Anion exchange capacity of biochar

2015

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Section: Potential Of Biochar To Reduce Anionic Nutrient Leaching Losmentioning

confidence: 99%

Anion exchange capacity of biochar

2015

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“…There is a tendency for more enriched  13 C values (up to -23.7‰) at deeper soil profiles to more depleted values at the surface layers. The highest differ- Pessenda et al (2001Pessenda et al ( , 2004Pessenda et al ( , 2005Pessenda et al ( , 2010b and Vidotto et al (2007). Ages obtained in this study (large black squares) were not included in the regression analysis.…”

Section: Of Soil Organic Mattermentioning

confidence: 99%

Late Pleistocene and Holocene Vegetation, Climate Dynamics, and Amazonian Taxa in the Atlantic Forest, Linhares, SE Brazil

Buso¹,

Pessenda²,

Oliveira

et al. 2013

Radiocarbon

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ABSTRACT. Analysis of biological proxies in lake sediment and geochemical analysis of soil profiles reveal natural vegetation dynamics, with climate inferences, since the late Pleistocene in a fragment of the pristine lowland Atlantic Forest of southeastern Brazil. Carbon isotopes from soil organic matter and 14 C ages from the humin fraction indicate the dominance of C 3 plants since ~17,000 cal BP. Palynological analysis of a sediment core indicates the presence of Atlantic Forest vegetation since 7700 cal BP. Changes in the relative abundance of tree ferns and palms suggest the predominance of a humid period from ~7000-4000 cal BP and establishment of the modern seasonal climate at ~4000 cal BP. Data indicate maintenance of the regional forest coverage since the late Pleistocene, corroborating previous suggestions that this region was a forest refuge during less humid periods of the late Pleistocene and Holocene. Some plant taxa with currently divided distributions between Amazonia and the Atlantic Forest colonized the region since at least 7500 cal BP, indicating an earlier connection between Amazonia and Atlantic Forest.

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“…δ 13 C, dating, palynology and charcoals When interpreting the δ 13 C results, it was taken into account that an alteration less than 3% is associated with isotopic fractionation that occurred during organic matter decomposition and with changes in the atmospheric CO 2 carbon isotope composition (Pessenda et al, 2010).…”

Section: Molar Ratiosmentioning

confidence: 99%