Bryophyte and pteridophyte spores and gymnosperm pollen grains of sedimentary profiles from two forest areas of the Southern Brazilian Coastal Plain

Roth, Lionel; Lorscheitter, Maria Luísa

doi:10.1007/s40415-013-0019-0

Cited by 8 publications

(8 citation statements)

References 9 publications

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“…In this present study, we showed, for the first time, a catalog of angiosperm pollen preserved in two Quaternary sediment profiles from the extreme northern coastal plain of Rio Grande do Sul, in the Faxinal and Pirataba rain forests of Torres Municipality. This is a continuation of our previous work on bryophyte and pteridophyte spores and gymnosperm pollen grains (Roth and Lorscheitter 2013), fungi, algae, and other palynomorphs (Roth and Lorscheitter 2016).…”

Section: Introductionsupporting

confidence: 75%

Angiosperm pollen grains in sedimentary profiles from two forest areas in the northernmost coastal plain from Rio Grande do Sul, southern Brazil

Roth

Lorscheitter

2017

Braz. J. Bot

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Pollen grains preserved in sediments are excellent for paleoenvironmental reconstitution because they indicate the plant origin and its environment. For such reconstitutions, reference palynological catalogs serve as the basis for the taxonomic determination of such preserved material. This study was performed to provide reference pollen for future paleoenvironmental studies. Here, we present taxonomic descriptions of 35 angiosperm pollen taxa, extracted from two Quaternary sedimentary profiles: Pirataba forest profile (29°15 0 S-49°51 0 W) and Faxinal forest profile (29°21 0 S-49°45 0 W), Torres Municipality, extreme northern coastal plain from Rio Grande do Sul, corresponding to the last 23,000 years according to radiocarbon dating. Ecological data and pollen illustrations accompany the taxonomic descriptions. The analysis provided distinct reference pollen taxa from varied habitats for paleoenvironmental studies of the last millennia in deposits of the coastal plain of Rio Grande do Sul, Southern Brazil.

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Section: Introductionsupporting

confidence: 75%

Angiosperm pollen grains in sedimentary profiles from two forest areas in the northernmost coastal plain from Rio Grande do Sul, southern Brazil

Roth

Lorscheitter

2017

Braz. J. Bot

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“…Our objective was to provide basic reference material for paleoenvironmental reconstructions of the last 23,000 years in this area. As a continuation of our previous work on bryophyte and pteridophyte spores and gymnosperm pollen grains (Roth and Lorscheitter 2013), we present the taxonomy of the fungi, algae, acritarchs, and other palynomorphs from two sedimentary profiles in the Pirataba and Faxinal rain forests, Torres Municipality. We present morphological descriptions, measurements, and photomicrographs.…”

Section: Introductionmentioning

confidence: 87%

Fungi, algae, and other palynomorphs in sedimentary profiles collected from two forests in the northernmost coastal plain from Rio Grande do Sul, southern Brazil

Roth

Lorscheitter

2016

Braz. J. Bot

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Fungi, algae, and other palynomorphs in sedimentary profiles collected from two forests in the northernmost coastal plain from Rio Grande do Sul, southern Brazil). We present, for the first time, taxonomic descriptions of 13 fungi, eight algae, three acritarchs, and nine other palynomorphs preserved in two Quaternary sediment profiles: Pirataba forest site (29°15 0 S-49°51 0 W) and Faxinal forest site (29°21 0 S-49°45 0 W), Torres Municipality, northernmost coastal plain from Rio Grande do Sul, southern Brazil. We aimed to provide taxonomic reference material for paleoenvironmental studies in the region. The profiles were collected using a Hiller Sampler, with a maximum interval of the last 23,000 years (according to radiocarbon dating). The samples were processed using HCl, HF, KOH, and acetolysis. Prepared specimens were examined by light microscopy. The palynomorphs were found during counts of a minimum of 300 angiosperms pollen grains in each sample (minimum number determined by plotting saturation curves). We present descriptions and illustrations of palynomorphs and relevant ecological data for the taxa. The high taxonomic diversity found will enable further studies of the vegetation and climatic changes on the northern coastal plain of southern Brazil.

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“…The slides were analysed under an optical microscope at 400x or 1,000x magnification, and 300 pollen grains and spores were counted for each sample when possible. Identification was based on several bibliographic references (e.g., Leal and Lorscheitter, 2007;Leonhardt and Lorscheitter, 2007Roth and Lorscheitter, 2013;Masetto and Lorscheitter, 2016), as well as on the palynological collection in the laboratory.…”

Section: Sample Processing and Palynological Analysismentioning

confidence: 99%

Continental influence on the fertilization of marine waters during the late quaternary in the south of the Brazilian continental margin

et al. 2022

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This study sought to understand the role of continental influence on ocean productivity along the late Quaternary based on the comparison between continental palynomorphs and paleoproductivity proxies from the marine sediment core SIS188. Retrieved from the slope of the Pelotas Basin at a depth of 1,514 m, the core documents the time interval between 47.8 and 7.4 cal ka BP, including the Marine Isotope Stages (MIS) 3, 2 and 1. The palynological content found in the core SIS188 indicates a typical flora of the southern Brazil highlands, which is at the same latitude as the core. Thus, continental input sources, such as wind-borne dust and discharges from the Mampituba and Araranguá rivers, would more likely account for the palynological content than the Brazilian Coastal Current (BCC). During the glacial intervals (MIS 3 and MIS 2), paleoproductivity (indicated by the proxies coccolith numbers, N Ratio, and TOC content) suggest the intensification of upwelling and transport of wind dust, the latter of which may have transported pollen grains to the core region. There is a concentration decrease of continental palynomorphs at the end of MIS 2, which is accentuated during MIS 1 when the sea level is higher. Paleoproductivity was high during MIS 1, especially from the Holocene onwards, although the concentration of continental-derived palynomorphs decreases sharply, showing that the rise in sea level interferes with the fertilization of marine waters far from the coast by continental input.

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Bryophyte and pteridophyte spores and gymnosperm pollen grains of sedimentary profiles from two forest areas of the Southern Brazilian Coastal Plain

Cited by 8 publications

References 9 publications

Angiosperm pollen grains in sedimentary profiles from two forest areas in the northernmost coastal plain from Rio Grande do Sul, southern Brazil

Angiosperm pollen grains in sedimentary profiles from two forest areas in the northernmost coastal plain from Rio Grande do Sul, southern Brazil

Fungi, algae, and other palynomorphs in sedimentary profiles collected from two forests in the northernmost coastal plain from Rio Grande do Sul, southern Brazil

Continental influence on the fertilization of marine waters during the late quaternary in the south of the Brazilian continental margin

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