@Article{LorentePOBRGCOMFFBM:2018:11ReDe,
author = "Lorente, Fl{\'a}vio Lima and Pessenda, Luiz Carlos Ruiz and
Oboh-Ikuenobe, Francisca and Buso Junior, Antonio Alvaro and
Rossetti, Dilce de F{\'a}tima and Giannini, Paulo C{\'e}sar
Fonseca and Cohen, Marcelo Cancela Lisboa and Oliveira, Paulo
Eduardo de and Mayle, Francis Edward and Francisquini, Mariah Izar
and Fran{\c{c}}a, Marlon Carlos and Bendassolli, Jos{\'e}
Albertino and Macario, Kita",
affiliation = "{Centro de Energia Nuclear em Agricultura (CENA)} and {Centro de
Energia Nuclear em Agricultura (CENA)} and {Missouri University of
Science and Technology} and {Centro de Energia Nuclear em
Agricultura (CENA)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and {Universidade de S{\~a}o Paulo (USP)} and
{Universidade Federal do Par{\'a} (UFPA)} and {Universidade de
S{\~a}o Paulo (USP)} and {University of Reading} and {Centro de
Energia Nuclear em Agricultura (CENA)} and {Instituto Federal do
Par{\'a} (IFPA)} and {Centro de Energia Nuclear em Agricultura
(CENA)} and {Universidade Federal Fluminense (UFF)}",
title = "An 11,000-year record of depositional environmental change based
upon particulate organic matter and stable isotopes (C and N) in a
lake sediment in southeastern Brazil",
journal = "Journal of South American Earth Sciences",
year = "2018",
volume = "84",
pages = "373--384",
month = "July",
keywords = "Holocene, Organic matter, Stable isotopes, Paleoenvironment,
Palynofacies.",
abstract = "The aim of this paper is to reconstruct an 11,000-year history of
depositional environmental change in southeastern Brazil, based
upon the integration of particulate organic matter and stable
isotope (C and N) data from a 136-cm sediment core from Lake Canto
Grande. These proxies are used to explore the evolution of
terrestrial and marine influence on the lake. Isotopic
(\δ13C: \−27.87 to \−31.9; \δ15N:
\−0.074.9) and elemental (total organic carbon - TOC:
0.58%37.19%; total nitrogen - TN: 0.08%1.73%; C/N: 0.3 to 54.7)
values recorded in Lake Canto Grande suggest that the sedimentary
organic matter was derived from mostly C3 land plants and
freshwater phytoplankton. Particulate organic matter and cluster
analyses distinguished four associations characterized by the
predominance of amorphous organic matter, followed by phytoclasts
and palynomorphs. These results indicate two different phases of
lake evolution. The first phase (136 - 65 cm; \∼10,943 cal
yr. B.P. to \∼8529 cal yr. B.P.) is recorded by sand layers
interbedded with mud, which contain amorphous organic matter (AOM,
4559%) and phytoclasts (opaques - OP: 618%; non-opaques NOP:
1723%) which indicate a floodplain area. The second phase (650 cm;
\∼8529 cal yr. B.P. to \∼662 cal yr. B.P.) comprises
mud, AOM (6886%) and palynomorphs (PAL, 816%) related to lake
establishment comparable to modern conditions. Thus,
characterizing particulate organic matter, in combination with
stable isotopes, proved to be invaluable proxies for lacustrine
paleoenvironmental change through the Holocene.",
doi = "10.1016/j.jsames.2018.04.006",
url = "http://dx.doi.org/10.1016/j.jsames.2018.04.006",
issn = "0895-9811",
language = "en",
targetfile = "lorente_11.pdf",
urlaccessdate = "04 maio 2024"
}