Modern pollen spectra of the Cerrado vegetation in two national parks of Central Brazil, and implications for interpreting fossil pollen records

Cassino, Raquel Franco; Martinho, Caroline Thaís; Silva-Caminha, Silane A.F. da

doi:10.1016/j.revpalbo.2015.09.002

Cited by 19 publications

(27 citation statements)

References 20 publications

(21 reference statements)

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“…75 k BP) appearing to be more densely wooded and having a higher (Figures 4 and 6). During the later phase, Araucaria forests established along with Myrtaceae, Podocarpus, Ilex and Drimys, which are indicators of cool and moist climates without modern analogue ( Figure 6) and are unlike modern cerrado pollen assemblages (Cassino, Martinho, & Silva Caminha, 2015;Salgado-Labouriau, 1979). After the peak of the forested period, between 51 and 46 k BP the forested cerrado transitioned to a cool cerrado savanna.…”

Section: Discussionmentioning

confidence: 99%

Climate change and biogeographic connectivity across the Brazilian cerrado

Oliveira

Raczka

McMichael

et al. 2019

Journal of Biogeography

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Aim To investigate cerrado responses to glacial–interglacial climate change and the potential for connective rain forest corridors between the Atlantic Coastal Forest and Amazonian rain forest. Location The crater lake of Serra Negra (18 °S, 46 °W) in Minas Gerais, Brazil. Taxon 117 fossil pollen types, 22 non‐pollen palynomorphs were documented. Methods We recovered 7.82 m of sediment from the lake, and analysed fossil pollen at 62 depth intervals throughout the core. We derived a chronology based on radiocarbon dating with simple rate extrapolation to the base of the core. Results The c. 90,000‐year fossil record showed a trend towards cooler climates at the Last Glacial Maximum (LGM), but interstadial warming coupled with reduced evaporative stress allowed the expansion of woodlands under cool, moist conditions. Cool‐adapted trees were most abundant between c. 67,000 and 48,000 years ago. A cool cerrado‐like environment marked full glacial conditions between c. 48,000 and 34,000 years ago. The peak of the LGM between c. 34,000 and 17,000 years ago is inferred to have been dry as no sediment accumulated in the system. Main conclusions Expanded ranges of cold‐tolerant forest taxa led to establishment of a series of assemblages without modern analogue. A system characteristic of modern cerrado was rare in the history of this site. Multiple forest expansions were observed, each differing in composition. The periods of forest abundance at Serra Negra were not temporally aligned with forest expansion in the Atlantic Coastal Forest, and did not provide a continuous corridor of similar forest that connected the cerrado to the Atlantic Coastal Forest.

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Section: Discussionmentioning

confidence: 99%

Climate change and biogeographic connectivity across the Brazilian cerrado

Oliveira

Raczka

McMichael

et al. 2019

Journal of Biogeography

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“…Radiocarbon ( 14 C Salgado-Labouriau, 1973;Cassino et al, 2015) and Amazonian Quaternary lake sediments (Colinvaux et al, 1999) MONOCOTS BROMELIACEAE Bromeliaceae Juss. (Figure 2.B) GU2 (40-55 cm)…”

Section: Chronologymentioning

confidence: 99%

“…Some species were registered in amphibious or emergent flora in Cerrado wetlands (Moreira et al, 2011). Occurrence in modern swamps from Central Brazil (Salgado-Labouriau, 1973;Cassino et al, 2015) and Amazonian savannahs (Bush & Weng, 2007;Gosling et al, 2009). Registered on Quaternary peat bogs and palm swamp sediments from distinct areas from Central Brazil (Ledru, 1993;Salgado-Labouriau et al, 1997;Cassino & Meyer, 2013 -Labouriau, 1973).…”

Section: Chronologymentioning

confidence: 99%

“…Registered on Quaternary peat bogs and palm swamp sediments from distinct areas from Central Brazil (Ledru, 1993;Salgado-Labouriau et al, 1997;Cassino & Meyer, 2013 -Labouriau, 1973). Regional occurrence in modern cerrado, caatinga, cerrado-caatinga transition and Amazonian savannah floras (Salgado-Labouriau, 1973;Colinvaux et al, 1999;Gosling et al, 2005Gosling et al, , 2009Chaves, 2013;Cassino et al, 2015). Compound herbaceous-subshrub layer of the moist grasslands and Campo Sujo communities from Central Brazil (Munhoz & Felfili, 2006, cerrado and caatinga mixed forests (Passos & Dubreuil, 2004) and inselbergs from Northeastern Brazil (Araujo et al, 2008).…”

Section: Chronologymentioning

confidence: 99%

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First Quaternary Brazilian cave pollen record: morphological descriptions, taxonomic and ecological data

Freitas¹,

Gonçalves-Esteves²,

Mendonça³

et al. 2020

Rev. bras. paleontol.

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This paper presents descriptions, and taxonomic and ecological data by the angiosperm pollen grains recovered from Quaternary sediments of the Gruta do Urso Cave, Tocantins State, Northern Brazil. Among recovered assemblage, 44 types of angiosperm pollen were identified. Most of the pollen types described here are related to the modern aboreal-shrub and herbaceous-subshrub taxa currently present in the plant communities of the Cerrado biome: (i) forest formations (Annonaceae,

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“…The Cerrado is a term commonly used to describe the group of ecosystems (savannas, forests, veredas and gallery forests) of the plateau in the center of Brazil (dos Santos et al, 2016, Cassino et al, 2015. It is the second largest Brazilian biome, occupying 23 % of the national territory (Borges et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

EXTRACTION OF BIOACTIVE COMPOUNDS OF LEAVES OF Duguetia furfuracea (ANNONACEAE) USING GREEN AND ORGANIC SOLVENTS

Favareto

Teixeira

Soares

et al. 2019

Braz. J. Chem. Eng.

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Duguetia furfuracea (Annonaceae) is a shrub found in the Brazilian Cerrado that is used in popular medicine as an antirheumatic, for wound healing, treatment of kidney pain and against pediculosis. The aim of this study was to analyze the extraction of leaves of Duguetia furfuracea, using supercritical CO 2 , ethanol and hexane as solvents. For the supercritical extraction, an experimental planning 2 3 with triplicates of the central point was used to evaluate the effects of temperature (313-333 K), pressure (15-23 MPa) and volumetric flow rate (3-6 mL min -1 ) on the extraction yield, total phenolic content and antioxidant activity compared with extracts obtained by Soxhlet extraction. The effects of the variables on the extraction yield were positive and the pressure had greater influence. However, the highest performances, total phenolic content and antioxidant activities were obtained by the Soxhlet method. The mathematical model based on the Brunauer-Emmett-Teller theory of adsorption correlated satisfactorily the experimental values of the supercritical extraction.

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Modern pollen spectra of the Cerrado vegetation in two national parks of Central Brazil, and implications for interpreting fossil pollen records

Cited by 19 publications

References 20 publications

Climate change and biogeographic connectivity across the Brazilian cerrado

Climate change and biogeographic connectivity across the Brazilian cerrado

First Quaternary Brazilian cave pollen record: morphological descriptions, taxonomic and ecological data

EXTRACTION OF BIOACTIVE COMPOUNDS OF LEAVES OF Duguetia furfuracea (ANNONACEAE) USING GREEN AND ORGANIC SOLVENTS

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