Middle to Late Holocene paleoenvironmental changes in the coastal plain of southern Brazil

Silva, Wagner G.; Souza, Paulo Alves de; Garcia, Maria da Glória Motta; Carvalho, Marcelo de Araújo; Dillenburg, Sérgio Rebello; Cancelli, Rodrigo Rodrigues; Kuhn, Lidia Aumond

doi:10.1016/j.jsames.2021.103514

Cited by 2 publications

(3 citation statements)

References 84 publications

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“…6000-5000 yr BP followed by a regressive event (e.g., Borel and Gómez, 2006;García-Rodríguez et al, 2010;Mourelle et al, 2015;Vilanova and Prieto, 2012). In general, the environmental zone succession identified in this study is similar to those presented in previous palaeoenvironmental studies developed on the southern Brazil coastal plain, in particular in the Santa Catarina sector (e.g., Amaral et al, 2012;Cancelli, 2012;Kuhn et al, 2017;Val-Peón et al, 2019;Silva et al, 2021). Most of these studies indicate a succession of three zones from a lagoonal/estuarine environment (I) to a transitional/swampy regime (II) and an arboreal forest environment (III).…”

Section: Environmental Evolution Of Southern Brazil Coastal Plain And...supporting

confidence: 89%

“…The pollen grains that originated from the Andes (Nothofagus and Alnus), are expected to be long-distance transported by air dispersion to the deposition site. These palynomorphs have been previously found in many Quaternary sedimentary profiles from southern Brazil coastal plain (e.g., Cancelli et al, 2012;Diniz and Medeanic, 2012;Masetto and Lorscheitter, 2016;Kuhn et al, 2017;Silva et al, 2021).…”

Section: Zone I: Lagoonal Stage (6500 Cal Yr Bp-2820 Cal Yr Bp)supporting

confidence: 67%

“…11). Moreover, other palynological studies in the southern Brazil coastal plain in the Rio Grande do Sul (e.g., Cordeiro and Lorscheitter, 1994;Lorscheitter and Dillenburg, 1998;Meyer et al, 2005;Masetto and Lorscheitter, 2019) and Santa Catarina states (Behling and Negrelle, 2001;Amaral et al, 2012;Cancelli, 2012;Kuhn et al, 2017;Val-Peón et al, 2019;Cohen et al, 2020;Silva et al, 2021), also identified the marine influence ca. 6000-5000 yr BP at their sites and showed a similar sea-level dynamic.…”

Section: Environmental Evolution Of Southern Brazil Coastal Plain And...mentioning

confidence: 90%

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Late Quaternary palaeoenvironmental evolution and sea level oscillation of the Santa Catarina Island (southern Brazil)

Kuhn

Zonneveld

Souza

et al. 2023

Preprint

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Abstract. Sea level oscillation during the Quaternary played a major role in the geomorphology and vegetation dynamics of coastal areas in southern Brazil, encompassing ecosystems that often have a unique biodiversity. Understanding the natural evolution of these areas is essential for decision-making of land use regulations towards sustainable development as well as to preserve the uniqueness of the coastal ecosystems. The southern Brazil coastal plain is formed by marine, transitional and continental Quaternary deposits controlled by relative past variations of the sea level. These variations shaped the coastal landscape and influenced the development of different Atlantic Rainforest formations, such as mangroves and restingas. In particular, the restinga formation corresponds to a specific ecosystem that covers sandy soils of marine and fluvial-marine origin formed during the Quaternary on the Brazilian coastal plain. In this contribution, we present high-resolution palynological and stable isotope data from a Holocene core retrieved from the coastal plain of the Santa Catarina Island (southern Brazil). We were able to identify four different environmental zones in the last 6500 yr BP. The first zone (6500–2820 cal yr BP) is characterized by a lagoon with large marine water influence. Notably, the observed dinoflagellate cyst association suggests that marine waters entering the region had its origin in the relatively warm saline Brazil Current waters. During the second zone (2820–1480 cal yr BP), marine water contribution to the lagoon decreased until it became disconnected with the sea. The third zone (1480–520 cal yr BP) was marked by the decrease of the water level until it dried out and led to the colonization of herbaceous vegetation over the palaeo-lagoon. The last zone (520 cal yr BP–recent) is characterized by the consolidation of the coastal plain Atlantic Rainforest (restinga vegetation). Our results form an example of the strong sensitivity of southern Brazilian ecosystem change caused by relative sea level variations. As such, it might contribute to the debate about potential effects of current climate change induced by global sea level variations.

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Section: Environmental Evolution Of Southern Brazil Coastal Plain And...supporting

confidence: 89%

Section: Zone I: Lagoonal Stage (6500 Cal Yr Bp-2820 Cal Yr Bp)supporting

confidence: 67%

Section: Environmental Evolution Of Southern Brazil Coastal Plain And...mentioning

confidence: 90%

See 1 more Smart Citation

Late Quaternary palaeoenvironmental evolution and sea level oscillation of the Santa Catarina Island (southern Brazil)

Kuhn

Zonneveld

Souza

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

Late Quaternary palaeoenvironmental evolution and sea level oscillation of Santa Catarina Island (southern Brazil)

Kuhn¹,

Zonneveld²,

Souza³

et al. 2023

Biogeosciences

View full text Add to dashboard Cite

Abstract. Sea level oscillation during the Quaternary played a major role in the geomorphology and vegetation dynamics of coastal areas in southern Brazil, encompassing ecosystems that often have a unique biodiversity. Understanding the natural evolution of these areas is essential for decision making regarding land use regulations towards sustainable development, as well as to preserve the uniqueness of the coastal ecosystems. The southern Brazil coastal plain is formed by marine, transitional and continental Quaternary deposits controlled by past variations of the sea level. These variations shaped the coastal landscape and influenced the development of different Atlantic rainforest formations, such as mangroves and restingas. In particular, the restinga formation corresponds to a specific ecosystem that covers sandy soils of marine and fluvial–marine origin formed during the Quaternary on the Brazilian coastal plain. In this contribution, we present high-resolution palynological and stable isotope data from a Holocene core retrieved from the coastal plain of Santa Catarina Island (southern Brazil). We were able to identify four different environmental zones for the last 6520 yr BP. The first zone (6520–2920 cal yr BP) is characterized by a lagoon with large marine-water influence. Notably, the observed dinoflagellate cyst association suggests that marine waters entering the region had their origin in the relatively warm and saline Brazil Current waters. During the second zone (2920–1520 cal yr BP), marine-water contribution to the lagoon decreased until it became disconnected from the sea. The third zone (1520–550 cal yr BP) was marked by the decrease of the water level until it dried out and led to the colonization of herbaceous vegetation over the palaeo-lagoon. The last zone (550 cal yr BP–recent) is characterized by the consolidation of the coastal-plain Atlantic rainforest (restinga vegetation). Our results form an example of the strong sensitivity of southern Brazilian ecosystem change caused by relative sea level variations. As such, this study might contribute to the debate about the potential effects of current climate change induced by global sea level variations.

show abstract

Middle to Late Holocene paleoenvironmental changes in the coastal plain of southern Brazil

Cited by 2 publications

References 84 publications

Late Quaternary palaeoenvironmental evolution and sea level oscillation of the Santa Catarina Island (southern Brazil)

Late Quaternary palaeoenvironmental evolution and sea level oscillation of the Santa Catarina Island (southern Brazil)

Late Quaternary palaeoenvironmental evolution and sea level oscillation of Santa Catarina Island (southern Brazil)

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