@Article{LorentePOBCMGORBFCBM:2014:DeSePa,
author = "Lorente, Flavio L. and Pessenda, Luiz Carlos Ruiz and
Oboh-Ikuenobe, Francisca and Buso Jr., Antonio Alvaro and Cohen,
Marcelo Cancela Lisboa and Meyer, Karin Elise Bohns and Giannini,
Paulo Cesar F. and Oliveira, Paulo Eduardo de and Rossetti, Dilce
de F{\'a}tima and Barotti Filho, Marcos Antonio and
Fran{\c{c}}a, Marlon C. and Castro, Darcil{\'e}a Ferreira and
Bendassolli, Jose Albertino and Macario, Kita",
affiliation = "{} and {} and {} and {} and {} and {} and {} and {} and {Instituto
Nacional de Pesquisas Espaciais (INPE)}",
title = "Palynofacies and stable C and N isotopes of Holocene sediments
from Lake Macuco (Linhares, Esp{\'{\i}}rito Santo, southeastern
Brazil): Depositional settings and palaeonvironmental evolution",
journal = "Palaeogeography, Palaeoclimatology, Palaeoecology",
year = "2014",
volume = "415",
pages = "69--82",
keywords = "holoceno, Paleoambientes, palinofacies, n{\'{\i}}vel do mar,
delta do rio doce.",
abstract = "Particulate organic matter in sediments constitutes a valuable
proxy for paleoenvironmental reconstructions. A 192 cm lacustrine
sediment core (~7521 cal yr. B.P.) from the northern coast of the
State of Esp{\'{\i}}rito Santo, southeastern Brazil, was
radiocarbon dated and then analyzed for palynofacies, stable
isotopes (C and N), and grain size. The values for total organic
carbon TOC (1.91% to 20.89%), total nitrogen TN (0.08% to 1.1%),
\δ13C (\−27.10 to \−29.01), \δ15N (1.92
to 5.09) and C/N (12.87 to 50.11) suggest predominance of C3
plants and changing mixtures of terrestrial and aquatic organic
matter in the sediments. Palynofacies and cluster analyses were
used to identify four palynofacies associations that reflect
different phases in the Lake Macuco evolution. Palynofacies 1 (192
to 106 cm, ~7521 cal yr. B.P. to ~7054 cal yr. B.P.interpolated
age) is characterized mainly by amorphous organic matter (AOM),
non-opaque phytoclasts (NOPs), mangrove pollen grains (Rhizophora
sp. L. 1753 and Avicennia sp. L. 1753), and foraminiferal test
linings. Palynofacies 2 (106 to 65 cm, ~7054 cal yr.
B.P.interpolated age to ~4847 cal yr. B.P.) is dominated by NOPs
and AOM, with an increase in the values of mangrove pollen grains
relative to Palynofacies 1. Both palynofacies reflect marine and
fluvial influences in a depositional environment related to the
development of an estuarine system during the mid-Holocene
transgressive stage. Palynofacies 3 (65 to 27 cm, ~4847 cal yr.
B.P. to ~3800 cal yr. B.P.interpolated age) comprises high
abundances of fluvial elements (NOP and opaque phytoclastsOP) and
low values of AOM. The depositional environment is interpreted as
being an estuary during the marine regression, with the
displacement of the estuarine basin and mangroves towards the sea.
Palynofacies 4 (27 to 0 cm, b~3800 cal yr. B.P.) is characterized
by the predominance of AOM and NOP, increase in the values of
freshwater algae, and no evidence of marine influence. This last
phase reflects the beginning of the establishment of Lake Macuco
and floodplain of the Barra Seca River under conditions similar to
the present-day.",
issn = "0031-0182",
label = "lattes: 0307721738107549 9 LorentePOBCMGORBFCBM:2014:DeSePa",
language = "en",
urlaccessdate = "02 maio 2024"
}