Holocene palaeoenvironmental history of the Amazonian mangrove belt

Cohen, Marcelo Cancela Lisboa; Pessenda, Luiz Carlos Ruiz; Behling, Hermann; Rossetti, Dilce de Fátima; França, Marlon Carlos; Guimarães, José Tasso Felix; Friaes, Yuri; Smith, Clarisse Beltrão

doi:10.1016/j.quascirev.2012.08.019

Cited by 75 publications

(88 citation statements)

References 67 publications

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“…This is proposed based on previous claims that RSL fall and increased sedimentary supply by river discharges, during the late Holocene, may have affected the relative position of the shoreline along the Brazilian coast, and, consequently, the characteristics of coastal stratigraphy and vegetation dynamics (Scheel-Ybert, 2000;Cohen et al, 2005a,b;Buso Junior et al, 2013;Guimarães et al, 2012;Smith et al, 2012;França et al, 2012;Cohen et al, 2012Cohen et al, , 2014.…”

Section: Climatic Changesmentioning

confidence: 99%

“…Several paleoenvironmental indicators, such as sedimentological features (Suguio et al, 1985;Giannini et al, 2007;Rossetti et al, 2012), isotopes and geochemical data (Freitas et al, 2003;Pessenda et al, 2010), pollen (Behling et al, , 2004Cohen et al, 2005aCohen et al, ,b, 2008Cohen et al, , 2012França et al, 2012) and diatoms (Round et al, 1990;Bennion, 1995;Hillebrand and Sommer, 2000;Rivera and Diaz, 2004;Hassan et al, 2006;Korhola, 2007;Zong and Horton, 1998;Zong et al, 2010;Castro et al, 2013) have been used individually to investigate the past climate and the sea level fluctuations, as well as local environmental changes.…”

Section: Introductionmentioning

confidence: 99%

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A multi-proxy evidence for the transition from estuarine mangroves to deltaic freshwater marshes, Southeastern Brazil, due to climatic and sea-level changes during the late Holocene

França

Alves

Castro

et al. 2015

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Section: Climatic Changesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A multi-proxy evidence for the transition from estuarine mangroves to deltaic freshwater marshes, Southeastern Brazil, due to climatic and sea-level changes during the late Holocene

França

Alves

Castro

et al. 2015

CATENA

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“…Scholl, 1964;Fujimoto et al, 1996;Beaman et al, 1994;Woodroffe et al, 1993;Fujimoto and Miyagi, 1993;Bryant et al, 1992;Chappell, 1993;Caratini and Fontugne, 1992;Clark and Guppy, 1988;Mildenhall and Brown, 1987;Cohen et al, 2005aCohen et al, , 2012.…”

Section: Discussionmentioning

confidence: 99%

“…It has been argued that the decreased river discharges during dry periods in Amazonia causes an upriver mangrove invasion along estuarine valleys due to an upriver increase of estuarine water salinity Cohen et al, 2012). This process may also cause a displacement of mangrove forest to lower topographic areas.…”

Section: Relative Sea-level and Climatic Changes During The Last 500 mentioning

confidence: 99%

“…Apparently, the deposition of muddy sediments and fluvial discharge were not constant during the late Holocene (e.g. Sommerfield et al, 2004;Cohen et al, 2012;Guimarães et al, 2012Guimarães et al, , 2013aGuimarães et al, , 2013b, and changes in the river discharge may result in significant relative sea-level variations along the coast (e.g. Mörner, 1996Mörner, , 1999.…”

Section: Introductionmentioning

confidence: 99%

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Relative sea-level and climatic changes in the Amazon littoral during the last 500 years

Cohen

Alves

França

et al. 2015

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Late Holocene mangrove dynamics dominated by autogenic processes

Moraes

Fontes

Cohen

et al. 2017

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Generally, palaeoenvironmental interpretations consider only allogenic processes, when autogenic factors may have a strong influence on proxies of stratigraphic sequences. For instance, the Holocene history of the vegetation along the southern littoral of the State of Bahia in north-eastern Brazil is characterized by mangrove dynamics controlled by allogenic processes. However, over smaller timescales (~700 years), autogenic processes may have controlled vegetation dynamics and hence observed pollen distribution. This work proposes tidal channel dynamics as one of the main cause for changes in pollen assemblage along the studied stratigraphic profiles during the last centuries, based on sedimentology, pollen and elemental analysis (δ 13 C, δ 15 N and C/N) and radiocarbon dating of sedimentary organic matter from two cores sampled from an abandoned meander and a tidal flat at the mouth of the Jucuruçu River. One core was sampled from a mangrove formed during the past~550 cal yr BP. Another core recorded sediments in a várzea forest (swamp seasonally and permanently inundated by freshwater) located~2.7 km from the current shoreline, which displayed a maximum age of~680 cal yr BP. Two facies associations were identified: tidal channel (A) and tidal flat/oxbow lake (B). This work proposes allogenic processes as the main driving forces controlling the wetlands dynamics at the studied site during the Holocene. However, our data also reveal that part of the changes in vegetation over the last~700 years reflect tidal channels and tidal flats development, which represent autogenic processes. The change in timescale analysis from the Holocene to recent centuries may have weakened the influence of allogenic factors. However, this needs interpretation with reference to the spatial scale of the depositional environment as the larger the depositional system analyzed, the stronger the influence of autogenic processes on stratigraphic sequences over longer timescales.

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Holocene palaeoenvironmental history of the Amazonian mangrove belt

Cited by 75 publications

References 67 publications

A multi-proxy evidence for the transition from estuarine mangroves to deltaic freshwater marshes, Southeastern Brazil, due to climatic and sea-level changes during the late Holocene

A multi-proxy evidence for the transition from estuarine mangroves to deltaic freshwater marshes, Southeastern Brazil, due to climatic and sea-level changes during the late Holocene

Relative sea-level and climatic changes in the Amazon littoral during the last 500 years

Late Holocene mangrove dynamics dominated by autogenic processes

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