Holocene climate change in central–eastern Brazil reconstructed using pollen and geochemical records of Pau de Fruta mire (Serra do Espinhaço Meridional, Minas Gerais)

Horák‐Terra, Ingrid; Cortizas, Antonio Martínez; Luz, Cynthia Fernandes Pinto da; López, Pedro Rivas; Silva, Alexandre Christófaro; Vidal‐Torrado, Pablo

doi:10.1016/j.palaeo.2015.07.027

Cited by 37 publications

(34 citation statements)

References 54 publications

(60 reference statements)

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“…According to the qualitative and quantitative analysis, at the core base (401-298 cm, horizon Oa7, ~10,000-7360 years cal BP) the concentration increased from c. 114,200 palynomorphs cm -3 at 401-402 cm to c. 250,840 palynomorphs cm -3 at 305-306 cm. This interval represents the early Holocene, and the samples were indicating a landscape with dominant and dense forest vegetation composed of semideciduous and mountain forests, and wet and rupicola-saxicolous grasslands, indicating wet and cold climate conditions, with some short events of slight reductions in humidity and increase in temperature (Horák, 2009;Horák-Terra, 2014;Horák-Terra et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

“…This interval represents a change from forest vegetation of humid and cold conditions to one indicating a drier and warmer climate. Between ~4200-3800 years cal BP the vegetation showed a decline of semideciduous forests and expansion of formations typical of drier conditions (Horák, 2009;Horák-Terra, 2014;Horák-Terra et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

“…The core was 428 cm thick and was classified as "Organossolo Háplico Sáprico típico", according to the Brazilian System of Soil Classification (EMBRAPA, 2006) and Hemic Haplosaprists according to the American System of Soil Classification (Soil Survey Staff, 2010). In Horák (2009), Horák et al (2011) and Horák-Terra et al (2014;2015) the core was described and characterized to evidence the soil constituent materials and properties related to changes in environmental conditions, supported by the isotopic and elementary characterization of soil C and N and 14 C ages.…”

Section: Sampling and Methodsmentioning

confidence: 99%

“…The soil sample from LUZ ET AL. -POLLEN RECORD OF A TROPICAL PEATLAND the core base, in 418 cm, was dated to 10,596 ± 102 years cal BP (Horák 2009, Horák-Terra et al, 2015.…”

Section: Sampling and Methodsmentioning

confidence: 99%

“…The main objective is to provide reference material for the palaeoenvironment reconstructions of tropical regions, especially those characterized by the Cerrado biome. Palynological data that allow inferences of palaeoclimatic interpretations was presented by Horák (2009) and Horák-Terra et al (2015).…”

Section: Introductionmentioning

confidence: 99%

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Pollen record of a tropical peatland (Pau de Fruta) from the Serra do Espinhaço Meridional, Diamantina, State of Minas Gerais - Angiosperms Eudicotyledons

Luz¹,

Horák‐Terra²,

Silva³

et al. 2017

Rev. bras. paleontol.

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This study presents the qualitative pollen analysis of a record of Pau de Fruta peatland, from the Serra do Espinhaço Meridional, Diamantina, State of Minas Gerais, Brazil, in order to investigate past changes in vegetation and climate as well as to provide reference material for the palaeoenvironmental reconstruction inserted in the Cerrado biome, currently found in the studied region. The analysis involved 21 stratigraphic levels from a core sample of 428 cm in lenght, corresponding to the last 10,596 ± 102 years cal BP. The chemical preparation consisted of application of HCl, HF, acetolysis, ultrasound, and mounting the slides in glycerin gelatin. The analyses were carried out under an optical microscope. A total of 128 pollen types, related to 57 families of eudicotyledonous angiosperms were identified and illustrated. These pollen types were related to forest phytophysionomies, represented by the semideciduous forest and mountain forest, and the Cerrado (broad sense) phytophysionomies, including savanna formations ("Cerrado Típico", "Cerrado Ralo" and "Cerrado Rupestre"), forest areas ("Cerradão") and grassland formations ("Campo Limpo Seco", "Campo Limpo Úmido" and "Campo Rupestre"). Ecological information on organisms of origin, as selectivity to light and humidity, were described to provide inferences of environments of occurrence. Wet and cold conditions (~10,000-7360 cal BP), followed by wet and warm (~7360-4200 years cal BP), dry and warm (~4200-2200 years cal BP), dry and punctuated cooling (~2200-1160 cal BP) until current subhumid climatic conditions (~1160-400 years cal BP and < ~400 years cal BP) are suggested by the succession of vegetation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Sampling and Methodsmentioning

confidence: 99%

“…The soil sample from LUZ ET AL. -POLLEN RECORD OF A TROPICAL PEATLAND the core base, in 418 cm, was dated to 10,596 ± 102 years cal BP (Horák 2009, Horák-Terra et al, 2015.…”

Section: Sampling and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pollen record of a tropical peatland (Pau de Fruta) from the Serra do Espinhaço Meridional, Diamantina, State of Minas Gerais - Angiosperms Eudicotyledons

Luz¹,

Horák‐Terra²,

Silva³

et al. 2017

Rev. bras. paleontol.

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Late Quaternary vegetation and climate dynamics in central‐eastern Brazil: insights from a ~35k cal a bp peat record in the Cerrado biome

Horák‐Terra

Cortizas

Luz

et al. 2020

J Quaternary Science

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The late Quaternary evolution of central-eastern Brazil has been under-researched.Questions remain as to the origin of the Cerrado, a highly endangered biome, and other types of vegetation, such as the Capões -small vegetation islands of semi-deciduous and mountain forests.We investigated the factors that influenced the expansion and contraction of the Cerrado and Capões during the late Quaternary (last ~35 ka), using a multi-proxy approach: stable isotopes (δ 13 C, δ 15 N), geochemistry, pollen, and multivariate statistics derived from a peat core (Pinheiro mire, Serra do Espinhaço Meridional). Five major shifts in precipitation, temperature, vegetation and landscape stability occurred at different timescales. Our study revealed that changes in the South Atlantic Convergence Zone (SACZ) seem to have been coeval with these shifts: from late glacial maximum to mid-Holocene the SACZ remained stationed near (~29.6 to ~16.5k cal a BP) and over (~16.5 to ~6.1k cal a BP) the study area, providing humidity to the region. This challenges previous research which suggested that climate was drier for this time period. At present, the Capões are likely to be a remnant of a more humid climate; meanwhile, the Cerrado biome seems to have stablished in the late Holocene, after ~3.1k cal a BP.

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Paleoenvironmental dynamics in central‐eastern Brazil during the last 23 000 years: tropical peatland record in the Cerrado biome

Costa

Luz

Horák‐Terra

et al. 2022

J Quaternary Science

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The Cerrado biome is the second largest in Brazil, but the evolution of the Cerrado during the late Quaternary is not yet fully known. This study identifies paleoenvironmental changes during the last 23 000 years, based on a tropical mountain peatland record, in the Serra do Espinhaço Meridional in central-eastern Brazil. A multi-proxy approach was used that involved palynological analysis, stable isotopes (δ 13 C, δ 15 N), geochemistry, radiocarbon dating and multivariate statistics derived from a peatland core from Rio Preto (Minas Gerais state). The study reveals a very humid and cold climate during the late Pleistocene, with an increase in temperature and decrease in humidity at the Pleistocene-Holocene transition. During this period there was strong instability in the landscape (episodes of erosion). At the beginning of the Holocene there was a reduction in humidity with greater landscape stability. The current sub-humid climatic conditions seem to have been established in the mid-/late Holocene, with periods of landscape instability. Our findings agree with other Cerrado records that contradict previously established hypotheses, such as the Amazonian Refuge and the Pleistocene Arc.

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Holocene climate change in central–eastern Brazil reconstructed using pollen and geochemical records of Pau de Fruta mire (Serra do Espinhaço Meridional, Minas Gerais)

Cited by 37 publications

References 54 publications

Pollen record of a tropical peatland (Pau de Fruta) from the Serra do Espinhaço Meridional, Diamantina, State of Minas Gerais - Angiosperms Eudicotyledons

Pollen record of a tropical peatland (Pau de Fruta) from the Serra do Espinhaço Meridional, Diamantina, State of Minas Gerais - Angiosperms Eudicotyledons

Late Quaternary vegetation and climate dynamics in central‐eastern Brazil: insights from a ~35k cal a bp peat record in the Cerrado biome

Paleoenvironmental dynamics in central‐eastern Brazil during the last 23 000 years: tropical peatland record in the Cerrado biome

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