| Full text | |
| Author(s): Show less - |
Pessenda, Luiz C. R.
[1]
;
Gouveia, Susy E. M.
[1]
;
Ledru, Marie-Pierre
[2]
;
Aravena, Ramon
[3]
;
Ricardi-Branco, Fresia S.
[4]
;
Bendassolli, Jose A.
[5]
;
Ribeiro, Adauto de S.
[6]
;
Saia, Soraya E. M. G.
[1]
;
Sifeddine, Abdelfettah
[2]
;
Menor, Eldemar de A.
[7]
;
de Oliveira, Sonia M. B.
[8]
;
Cordeiro, Renato C.
[9]
;
Freitas, Angela M. de M.
[10]
;
Boulet, Rene
[8]
;
Filizola, Heloisa F.
[11]
Total Authors: 15
|
| Affiliation: Show less - | [1] CENA USP, Lab Carbono 14, BR-13400970 Piracicaba, SP - Brazil
[2] Inst Rech Dev, F-93143 Bondy - France
[3] Univ Waterloo, Dept Earth & Environm Sci, Waterloo, ON N2L 3G1 - Canada
[4] Univ Estadual Campinas, Inst Geosci, Dept Geol & Recursos Nat, BR-13083970 Campinas, SP - Brazil
[5] CENA USP, Lab Isotopos Estaveis, BR-13400970 Piracicaba, SP - Brazil
[6] Univ Fed Sergipe, Ctr Ciencias Biol Saude, BR-49100000 Aracaju, SE - Brazil
[7] Univ Fed Pernambuco, Dept Geol, BR-50749530 Recife, PE - Brazil
[8] Univ Sao Paulo, Inst Geociencias, BR-05508080 Sao Paulo - Brazil
[9] Univ Fed Fluminense, Dept Geoquim, BR-24020007 Niteroi, RJ - Brazil
[10] Univ Fed Rural Pernambuco, BR-52171900 Recife, PE - Brazil
[11] Embrapa Meio Ambiente, BR-13820000 Jaguariuna, SP - Brazil
Total Affiliations: 11
|
| Document type: | Journal article |
| Source: | Anais da Academia Brasileira de Ciências; v. 80, n. 4, p. 677-691, DEC 2008. |
| Web of Science Citations: | 7 |
| Abstract | |
The aim of this research was to reconstruct vegetation changes (with climate inferences) that occurred during the Holocene in the Fernando de Noronha Island, Pernambuco State, northeastern Brazil. The research approach included the use of geochemical (mineralogy, elemental), carbon isotopes (δ13C, 14C) and pollen analyses in soil organic matter (SOM) and sediments collected in Lagoa da Viração and Manguezal do Sueste. The carbon isotopes data of SOM indicated that there was no significant vegetation changes during the last 7400 BP, suggesting that the climate was not the determinant factor for the vegetation dynamics. The pollen analysis of the sediment of a core collected in the Lagoa da Viração showed the absence of Quaternary material in the period between 720 BP and 90 BP. The mineralogical analysis of deeper layer showed the presence of diopside indicating this material was developed "in situ". Only in the shallow part of the core were found pollen of similar plant species of the modern vegetation. The geochemistry and isotope results, in association with the sediment type and pollen analyses of sediment samples of Manguezal do Sueste, indicated variations in the vegetation and in its location since the middle Holocene. Such variations can be associated with climatic events and sea level oscillations and also with anthropogenic events considering the last five hundred years. (AU) | |