Os grandes clímaces do Brasil: I - considerações sôbre os tipos vegetativos da região sul

Veloso, Henrique P.

doi:10.1590/s0074-02761962000200003

Cited by 12 publications

(11 citation statements)

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“…According to those studies the grassland is a probable relict of late Quaternary semi-arid climate unrelated to humid modern environment. Furthermore, Araucaria forest is still expanding because of the increase of moisture in the last millennia (Rambo, 1953;Veloso, 1962;Hueck, 1972;Klein, 1975). In recent years, some palynological studies have advanced the understanding of the last millennia palaeoenvironments in Rio Grande do Sul eastern Plateau (Roth and Lorscheitter, 1993;Behling et al, 2001Behling et al, , 2004Behling and Pillar, 2007) and in other Southern Brazilian highlands (Behling, 1995(Behling, , 1997(Behling, , 1998(Behling, , 2002.…”

Section: Introductionmentioning

confidence: 99%

The last 25,000 years in the Eastern Plateau of Southern Brazil according to Alpes de São Francisco record

Leonhardt¹,

Lorscheitter²

2010

Journal of South American Earth Sciences

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Section: Introductionmentioning

confidence: 99%

The last 25,000 years in the Eastern Plateau of Southern Brazil according to Alpes de São Francisco record

Leonhardt¹,

Lorscheitter²

2010

Journal of South American Earth Sciences

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“…Por meio da expressão gráfica externada pela curva espécie/área, podese verificar que o esforço amostral foi suficiente quando se considerou a totalidade de parcelas alocadas (Figura 2), a ponto de provocar uma visível estabilização na curva (VELOSO, 1962;IBGE, 1992;KLEIN, 1984).…”

Section: Resultsunclassified

Caracterização fitossociológica da vegetação no entorno de nascentes de um fragmento de Floresta Ombrofila Mista Montana na bacia do rio das Pedras, Guarapuava (PR) / Phytosociological characterization of the vegetation around water springs of the fragment of mixed ombrophilous forest in watershed of rio das Pedras, Guarapuava (PR)

et al. 2012

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Foi inventariado um fragmento de Floresta Ombrófila Mista Montana, pouco antropizado, com duas nascentes distanciadas 1,5 metros uma da outra, integrantes da bacia hidrográfica do rio das Pedras, na zona rural do município de Guarapuava, Paraná-Brasil (25 o 19'30"S e 51 o 23'55"W), com o objetivo de contribuir para um maior conhecimento da composição florística e fitossociológica da região bem como estudar a importância da vegetação na preservação da qualidade da água que aflora dessas nascentes. Às margens das nascentes foram instaladas 14 parcelas de 200 m 2 , onde foram inventariados 484 indivíduos, com DAP (diâmetro a altura do peito) mínimo de 5 cm, distribuídos em 23 famílias com 32 espécies. O valor do índice de diversidade de Shannon foi de 2,406. As famílias Fabaceae, Lauraceae, Sapindaceae e Solanaceae foram as que apresentaram maior riqueza de espécies (3). Entre essas três famílias, chama a atenção a Sapindaceae que responde por 43% do total de indivíduos amostrados. A densidade total estimada foi de 1.728 indivíduos/ ha, com DAP médio de 10,32 cm e área basal de 29,82 m 2 /ha. De acordo com a variável valor de importância (VI), as seis espécies que mais se destacaram foram:

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“…The Southern region (Figure 2) comprises the ombrophilous forest, a field vegetation ("Campos Sulinos"), a "Restinga" formation [20] and patches of a "Cerrado" vegetation in the State of Paraná [21]. The transition of the tropical to a subtropical environment occurs in the state of Paraná, with a great variety of plant associations.…”

Section: Introductionmentioning

confidence: 99%

Palynology as a Tool to Distinguish between Propolis and Geopropolis: Southern Brazilian Samples

Barth¹,

Freitas²

2015

OALib

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Propolis is a product elaborated by honey bees (Apis) and comprises plant resins, bee wax, glandular secretions of the worker bees and pollen grains. Geopropolis is a product elaborated by stingless bees and comprises similar compounds of honey bees and soil, mud, clay, earth or sand. The present study intends to distinguish between propolis and geopropolis using pollen analysis. A total of 12 samples were obtained in the Southern Brazilian macro-region and processed by standard melissopalynological methodology. All structural components recovered after alcoholic extraction and before acetolysis treatment were evaluated. Four of the eight samples collected in the State of Paraná were prepared by Apis and showed a strong contribution of Asteraceae and Eucalyptus pollen grains. On the other hand, the two geopropolis samples of Tetragonisca angustula contained mainly Cecropia pollen grains, while the samples of Melipona quadrifasciata and Melipona mondury showed a predominance of Melastomataceae pollen grains. The four propolis samples obtained in the Santa Catarina and Rio Grande do Sul States were characterized by a predominant pollen contribution of Asteraceae and Eucalyptus. Additional structured elements in propolis samples comprised frequently plant trichomes and tissue fragments. On the contrary, the geopropolis samples showed high values of spores of fungi, amorphous organic matter, sand or clay and sometimes remainder of resin. In conclusion, the pollen grain spectra do not distinguish between propolis of Apis and geopropolis of stingless bees, but the accessory elements are conclusive.

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Os grandes clímaces do Brasil: I - considerações sôbre os tipos vegetativos da região sul

Cited by 12 publications

References 0 publications

The last 25,000 years in the Eastern Plateau of Southern Brazil according to Alpes de São Francisco record

The last 25,000 years in the Eastern Plateau of Southern Brazil according to Alpes de São Francisco record

Palynology as a Tool to Distinguish between Propolis and Geopropolis: Southern Brazilian Samples

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