Late Holocene Vegetation History and Early Evidence of Araucaria angustifolia in Caçapava do Sul in the Lowland Region of Rio Grande do Sul State, Southern Brazil

Behling, Hermann; Verissimo, Nuno; Bauermann, Soraia Girardi; Bordignon, Sérgio Augusto de Loreto; Evaldt, Andreia Cardoso Pacheco

doi:10.1590/1678-4324-2016150264

Cited by 10 publications

(3 citation statements)

References 18 publications

(15 reference statements)

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“…Regard to the A. angustifolia dynamics along the time in this forest, there is a clear pattern of reduction of the population (Bordin 2018), which reinforces the Seasonal forest species turnover on the Araucaria forest species. Paleoecological analysis in the Araucaria forest areas at Rio Grande do Sul state revealed that population of A. angustifolia was much larger than today, where we can find typical semi-deciduous species occurring in these areas (Behling et al 2016). It indicates that same pattern of turnover from Araucaria to Seasonal forest species composition is a trend found in other Atlantic Forest s.l.…”

Section: Floristic Relationships Between Two Forest Typologiesmentioning

confidence: 55%

Community structure and tree diversity in a subtropical forest in southern Brazil

et al. 2019

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Local and regional environmental variations lead to different species composition, creating transitional areas. An example is the Araucaria and Seasonal forest in southern Brazil. Our objectives were (1) to describe the tree community structure and composition of a subtropical forest in southern Brazil and (2) to compare the floristic relationships between two forest typologies (Araucaria and Seasonal forest) in order to characterize the study area and the distribution patterns of tree species. We conducted a survey at Chapecó National Forest (in southern Brazil) in an area of 1.2 ha, where all individuals ≥ 30 cm of circumference at breast height were sampled. Community structure was described using the traditional phytosociological parameters. The floristic relationships were obtained by comparing our results with compiled data from other scientific papers through cluster analyses using an unweighted average linkage method, based on Jaccard similarity coefficient. We sampled 809 individuals belonging to 61 species and 28 families. The richest family was Fabaceae and Coussarea contracta (Walp.) Müll.Arg. was the most abundant species. Taxonomic diversity was 3.06 and the evenness was 0.74. The floristic similarity revealed that species composition of our study area is more similar to Seasonal forest. Species composition is related to environmental factors such as great thermal amplitude and seasonality. This subtropical forest is well structured, highly diverse and extremely important for the local and regional biodiversity conservation.

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Section: Floristic Relationships Between Two Forest Typologiesmentioning

confidence: 55%

Community structure and tree diversity in a subtropical forest in southern Brazil

et al. 2019

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“…In each sample, 300 pollen grains were identified and quantified using a magnification of 400x of the Leica DMLB microscope. The pollen reference of Laboratório de palinologia da ULBRA and pollen atlas [10,[20][21][22][23][24][25][26][27] were consulted to identification of the palynomorphs.…”

Section: Vegetationmentioning

confidence: 99%

Influence of Soil and Vegetation in the Pollen Spectrum Modeling from Caçapava do Sul, Rio Grande do Sul, Brazil

Acp¹

2018

OAJAR

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Pollen analysis of surface sediments is an important tool for Quaternary Palynology, by comparing modern and fossil pollen allows to identify analogs processes occurred in the past. Aiming to expand the knowledge about the deposition and preservation of palynomorphs in Rio Grande do Sul, were identified and characterized sets pollen deposited on the soil surface from samples collected in two different vegetation formations (Araucaria forest and grassland) of the Caçapava do Sul. The nine samples were treated with the usual techniques for palynology, granulometry analysis and analysis of organic carbon. The palynological slides are deposited in the reference pollen collection of the Laboratory of Palynology of ULBRA. 300 pollen grains for each sample were quantified and identified. The results obtained with the pollen analysis showed that all pollen reflected the main species of the grassland formation (Poaceae, Asteraceae, Amaranthaceae, Eryngium L. and Vernonia Schreb.), and the Araucaria forest, which highlighted species are Arecaceae, Myrtaceae, Araucaria angustifolia (Bertol.) Kuntze, Podocarpus lambertii Klotzsch ex Endl. and Ilex L.. The results of the physicochemical analysis compared with the results palynological, demonstrated a positive correlation between clay, organic carbon content and the concentration of pollen.

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“…Este caráter relictual foi corroborado por estudos de pólen acumulado em turfeiras (Behling et al, 2004(Behling et al, , 2016. Lima et al (2002) também reconhecem a existência de matas de araucária em áreas no sul do Rio Grande do Sul.…”

Section: Nicho De Ocorrência De a Angustifolia No Presente E Nos Cenunclassified

Distribuição natural e habitat da araucária frente às mudanças climáticas globais

et al. 2017

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Resumo -A araucária (Araucaria angustifolia (Bertol.) O. Kuntze.), conhecida como pinheiro-do-paraná, é uma espécie florestal nativa do Brasil, adaptada às regiões serranas frias e úmidas do sul e do sudeste do país e torna-se vulnerável diante das mudanças climáticas globais. Apresenta grande valor econômico, social e ambiental, pois é uma das espécies nativas com maior incremento e potencial de ganho genético, apresenta excelente qualidade de madeira e ainda produz sementes que podem ser usadas na alimentação humana e animal. Com o objetivo de conhecer a distribuição natural atual e o habitat das populações, percorremos parte das bordas da região de ocorrência da araucária, marcando a posição geográfica e altitude. Com as informações de campo, juntamente com dados secundários do Centro de Informações Ambientais (CRIA), mapeamos a distribuição da araucária no presente e simulamos para as próximas décadas, considerando a projeção de cenários climáticos futuros. Estes estudos são essenciais para a melhor compreensão dos riscos de extinção e das medidas mitigadoras que poderiam ser adotadas para reduzir os impactos das mudanças climáticas globais sobre a espécie, contribuindo, dessa maneira, para a sua conservação. Distribution and habitat of brazilian-pine according to global climate changeAbstract -Araucaria angustifolia (Bertol.) O. Kuntze., also known as brazilian-pine, is a forest native species from Brazil. A. angustifolia is more vulnerable to global climate change, considering it is living in cold and humid mountain regions from southern and southeastern Brazil. Among the native Brazilian forest species, it presents one of the greatest growth and genetic gain potential. It shows excellent wood quality and can still be used in human and animal food, presenting great economic, social and environmental value. In order to determine current distribution of the species and better know its habitat, we worked in the regions representing the borders of natural occurrence, identifying populations and getting trees altitude and geographycal position. Field information along with secondary data from the Environmental Information Center (CRIA) were used to map current distribution of brazilian-pine and to project the distribution in the next decades, with the projection of future climate scenarios. Mapping studies of ecological niches in present and future climate scenarios characterizing the environments in which they are living is essential for a better understanding of the risks of species extinction and which mitigating measures could be adequate to reduce the impacts of global climate change on species, thus contributing to the conservation and knowledge of this important species.

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Late Holocene Vegetation History and Early Evidence of Araucaria angustifolia in Caçapava do Sul in the Lowland Region of Rio Grande do Sul State, Southern Brazil

Abstract: Little is known about the southernmost occurrence of small areas with Araucaria angustifolia populations in Caçapava do Sul in low elevated areas of Rio Grande do

Cited by 10 publications

References 18 publications

Community structure and tree diversity in a subtropical forest in southern Brazil

Community structure and tree diversity in a subtropical forest in southern Brazil

Influence of Soil and Vegetation in the Pollen Spectrum Modeling from Caçapava do Sul, Rio Grande do Sul, Brazil

Distribuição natural e habitat da araucária frente às mudanças climáticas globais

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