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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Paleovegetation and paleoclimate dynamics during the last 7000 years in the Atlantic forest of Southeastern Brazil based on palynology of a waterlogged sandy soil

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Buso Junior, Antonio Alvaro [1] ; Ruiz Pessenda, Luiz Carlos [1] ; Mayle, Francis Edward [2, 3] ; Lorente, Flavio Lima [1] ; Volkmer-Ribeiro, Cecilia [4] ; Schiavo, Jolimar Antonio [5] ; Pereira, Marcos Gervasio [6] ; Bendassolli, Jose Albertino [7] ; Damasio Macario, Kita Chaves [8] ; Siqueira, Geovane Souza [9]
Total Authors: 10
[1] Univ Sao Paulo, 14C Lab, Ave Centenario 303, BR-13400970 Piracicaba, SP - Brazil
[2] Univ Reading, Ctr Past Climate Change, Reading RG6 6DW, Berks - England
[3] Dept Geog & Environm Sci, Reading RG6 6DW, Berks - England
[4] Fundacao Zoobot Rio Grande Sul, Museu Ciencias Nat, Rua Dr Salvador Franca 1427, BR-90690000 Porto Alegre, RS - Brazil
[5] Univ Estadual Mato Grosso do Sul, Unidade Univ Aquidauana, Rodovia Aquidauana, Km 12, Aquidauana, MS - Brazil
[6] Univ Fed Rural Rio de Janeiro, Inst Agron, Dept Solos, BR-465 Seropedica, RJ - Brazil
[7] Univ Sao Paulo, Stable Isotope Lab, Ave Centenario 303, BR-13400970 Piracicaba, SP - Brazil
[8] Univ Fed Fluminense, Inst Fis, Av Gen Milton Tavares de Souza S-N, BR-24210346 Niteroi, RJ - Brazil
[9] Vale Nat Reserve, BR 101 Highway, Km 122, Linhares, ES - Brazil
Total Affiliations: 9
Document type: Journal article
Web of Science Citations: 0

Mineral soils are usually considered inappropriate for pollen analysis because of the poor quality of pollen and spore preservation and the disturbed stratigraphy. However, here we present a 57 cm core, collected from a waterlogged sandy soil in the lowland Atlantic Forest of SE Brazil, which shows good stratigraphy and good preservation of pollen and spores since similar to 7000 cal. BP, both in organic and in mineral horizons. By the other hand, the decomposition of the organic matter and its translocation along the soil profile led to changes of C and N results (TOC, TN, C/N, delta C-13 and delta N-15). Mid-Holocene paleoclimate inferences from this study are in accordance with climate fluctuations presented in previous studies for Central, Southeastern and Southem Brazil, when a change to more humid climate occurred at similar to 7000 cal BP. The process responsible for the presence of biological proxies along this sandy soil profile involves the continuous deposition of these proxies together with litter and sand, and the subsequent decomposition of the litter. Ultimately, this process led to the vertical accretion of the sand with the more resistant organic structures preserved in stratigraphic sequence. The preservation of pollen and spores along the profile is probably caused by low pH and redoximorphic conditions due to water saturation. This study suggests the potential for retrieving useful paleoecological information from mineral and organic horizons of tropical waterlogged sandy soils, which is especially useful for those regions where traditional pollen archives (lakes and peat bogs) are absent. (C) 2019 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/00995-7 - Interdisciplinary paleoenvironmental studies in the Espirito Santo State coast
Grantee:Luiz Carlos Ruiz Pessenda
Support Opportunities: Research Program on Global Climate Change - Thematic Grants
FAPESP's process: 07/06222-4 - Holocenic environmental dynamics (vegetation, climate and relative sea-level) based on high resolution interdisciplinary studies, in the northern coast of Espírito Santo state.
Grantee:Antonio Alvaro Buso Junior
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 10/18091-4 - Late Quaternary dynamics of Spodosols, vegetation and climate at the northeastern region of Espírito Santo state.
Grantee:Antonio Alvaro Buso Junior
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 07/03615-5 - Reconstruction of vegetation and climate since the middle Holocene in Brazil
Grantee:Luiz Carlos Ruiz Pessenda
Support Opportunities: Regular Research Grants