Florística e fitossociologia da vegetação de um campo sujeito à arenização no sudoeste do Estado do Rio Grande do Sul, Brasil

Freitas, Elisete Maria de; Boldrini, Ilsi Iob; Müller, Sandra Cristina; Verdum, Roberto

doi:10.1590/s0102-33062009000200013

Cited by 22 publications

(19 citation statements)

References 10 publications

(9 reference statements)

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“…Assim, considerando os aspectos da especificidade em termos de fauna e flora existentes no interior e no entorno dos areais, conforme Silva (2008) e Freitas et al (2009), verifica-se como atrativo de interesse científico e geoturístico a significativa biodiversidade. Conforme os autores, as espécies dominantes são gramíneas reptantes típicas dos campos que caracterizam a fisionomia do Pampa e a base do pastoreio, representadas principalmente por Paspalum stellatum, P. nicorae e P. notatum.…”

Section: Resultsunclassified

Os areais do sudoeste do Rio Grande do Sul, Brasil, como patrimônio geomorfológico

et al. 2019

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Os processos de arenização encontrados no sudoeste do RS, Brasil, são um fenômeno único, localizado entre as unidades geomorfológicas da Escarpa do Planalto de Uruguaiana e a Depressão Periférica. Os areais se constituem como produto do intemperismo destas formações e que lhes confere uma condição geomorfológica particular. O presente trabalho tem por objetivo estabelecer relações entre a arenização, seu aproveitamento turístico enquanto patrimônio geomorfológico e os conflitos ambientais ocasionados pelo modelo econômico dominante. Dentre os areais que podem ser identificados na região, o do Cerro da Esquina possui condições de exploração turística, pois permite que parte da “memória da Terra” seja compreendida a partir da sua observação. O potencial dos areais enquanto patrimônio geomorfológico para o desenvolvimento do turismo pode ser avaliado a partir de diferentes aspectos: (i) a compreensão do próprio processo, ou seja, o que são os areais e como surgiram; (ii) a sua vinculação no contexto da bacia hidrográfica do arroio Inhacundá, dentro da qual, se passa por diferentes compartimentos, até chegar aos relevos testemunhos, associados às formações sedimentares (Botucatu e Guará), aos areais e às turfeiras nos fundos dos vales de seus tributários; e (iii) a beleza cênica do conjunto paisagístico da região. Nesta perspectiva, questiona-se a implantação da monocultura silvícola, a qual interfere no processo de conservação do patrimônio geomorfológico, reduzindo o potencial geoturístico apresentado pela região.

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Section: Resultsunclassified

Os areais do sudoeste do Rio Grande do Sul, Brasil, como patrimônio geomorfológico

et al. 2019

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“…Since the Rio Grande do Sul State holds around 75% of this environment [29], it should be a good estimation of the grassland species occurring in the Pampa biome. In spite of this high diversity, studies on plant diversity and distribution within the Brazilian Pampa indicate a typical pattern of high species richness but with low relative abundance [22,30,31]. The main botanical families found in the grasslands of the Brazilian Pampa are Poaceae, Asteraceae, Cyperacea, Fabaceae, Apiacea, Oxalidaceae, Verbanaceae, and Iridaceae [22,29].…”

Section: Flora and Fauna: Characteristics Fragility And Conservationmentioning

confidence: 99%

The Brazilian Pampa: A Fragile Biome

et al. 2009

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Biodiversity is one of the most fundamental properties of Nature. It underpins the stability of ecosystems, provides vast bioresources for economic use, and has important cultural significance for many people. The Pampa biome, located in the southernmost state of Brazil, Rio Grande do Sul, illustrates the direct and indirect interdependence of humans and biodiversity. The Brazilian Pampa lies within the South Temperate Zone where grasslands scattered with shrubs and trees are the dominant vegetation. The soil, originating from sedimentary rocks, often has an extremely sandy texture that makes them fragile—highly prone to water and wind erosion. Human activities have converted or degraded many areas of this biome. In this review we discuss our state-of-the-art knowledge of the diversity and the major biological features of this regions and the cultural factors that have shaped it. Our aim is to contribute toward a better understanding of the current status of this special biome and to describe how the interaction between human activities and environment affects the region, highlighting the fragility of the Brazilian Pampa

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“…In recent years, there have been advances in the floristic knowledge of grassland ecosystems in the region, but studies usually considered single sites or, at best, smaller regions, and have been conducted using different sampling designs and methods (e.g., for Pampa: Caporal & Boldrini, ; Ferreira & Setubal, ; Freitas, Boldrini, Müller, & Verdum, ; Setubal & Boldrini, ; Pinto et al., ; Menezes, Müller, & Overbeck, ; Silva Filho, Macedo, Souza Vieira, & Neves, ; for highland grasslands: Zanin, Longhi‐Wagner, Souza, & Rieper, ; Moro & Carmo, ; Kozera, Kuniyoshi, Galvão, & Curcio, ; Andrade et al., ; Moraes et al., ; Silva, Andrade, Velazco, Galvao, & Carmo, ). These studies are important for describing local floristic patterns and grassland vegetation structure and can be used to describe regional vegetation patterns.…”

Section: Introductionmentioning

confidence: 99%

Classification of South Brazilian grasslands: Implications for conservation

Andrade

Bonilha

Overbeck

et al. 2019

Applied Vegetation Science

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Aims We offer a first classification of South Brazilian grasslands (Campos Sulinos) based on quantitative vegetation data and describing grassland types in terms of dominant and indicator species. Location South Brazilian grasslands (Paraná, Santa Catarina, Rio Grande do Sul states). Methods We described vegetation plots in 167 sampling units throughout the region using a stratified nested design, totalizing 1,502 1 m² quadrats. We classified vegetation using cluster analysis based on Bray–Curtis dissimilarities, establishing three vegetation types and ten subtypes. We conducted indicator species analysis within the resulting subtypes, and for all possible combinations of subtypes. Results In the cluster analyses, a clear separation of poorly drained grasslands from the drier sites appeared. Further, a clear distinction between grasslands in the South Brazilian highland region, situated in the Atlantic Forest biome, and the grasslands of the Pampa biome, to the south, emerged, reflecting climatic and management differences. Highland grasslands showed lower species cover dominance, while in the Pampa, Paspalum notatum clearly was the most important species and the abundance of exotic species was higher. Conclusions Our study provides the first classification of South Brazilian grasslands based on quantitative vegetation data recorded in a standardized sampling design. The data support the division of grasslands into the main phytogeographic units of the region (Brazilian biome classification). Grasslands in these two regions also differ in terms of species dominance pattern (higher dominance in Pampa grasslands, likely also due to higher grazing levels) and in terms of conservation state (low presence of exotic species in highland grasslands). Our results are important for conservation policies, which can now consider the presence of different grassland types in different region, but more data will be necessary for a more detailed classification that considers different abiotic features in more detail.

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Florística e fitossociologia da vegetação de um campo sujeito à arenização no sudoeste do Estado do Rio Grande do Sul, Brasil

Cited by 22 publications

References 10 publications

Os areais do sudoeste do Rio Grande do Sul, Brasil, como patrimônio geomorfológico

Os areais do sudoeste do Rio Grande do Sul, Brasil, como patrimônio geomorfológico

The Brazilian Pampa: A Fragile Biome

Classification of South Brazilian grasslands: Implications for conservation

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