Floristic composition, environmental variation and species distribution patterns in burned grassland in southern Brazil

Overbeck, Gerhard Ernst; Müller, Sandra Cristina; Pillar, Valério D.; Pfadenhauer, Jörg

doi:10.1590/s1519-69842006000600015

Cited by 57 publications

(67 citation statements)

References 20 publications

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“…Jaccard similarity indexes between our study (Morro do Osso) and two others granitic hills from Porto Alegre region. Data for Morro Santana and Morro da Polícia obtained respectively from Overbeck et al (2006) and Boldrini et al (1998). "Sampled Species" values represent taxa identified to the specific level.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, granitic grassland formations tend to present high species richness, as showed by Boldrini et al (1998) in a study based on point method on Morro da Polícia, where 189 species were surveyed. In another similar hill (Morro Santana), 165 species were recorded by plot survey in a grassland area that burns in intervals of three to five years (Overbeck et al 2006).…”

Section: Discussionmentioning

confidence: 99%

“…The species list obtained in the structural survey was submitted to a similarity analysis (Jaccard similarity index) based on structural data from two neighboring granitic hills: Morro da Polícia (Boldrini et al 1998) and Morro Santana (Overbeck et al 2006). Only fully identified taxa (specific level) were included in this analysis.…”

Section: °mentioning

confidence: 99%

“…Nevertheless, fire disturbances not always have hazardous consequences for plant communities, such as depletion of soil nutrients and local plant extinction, and there is growing evidence of the importance of both natural and human-driven fires for the maintenance of many natural grassland communities (Quadros & Pillar 2001, Uys et al 2004, Overbeck et al 2005, Overbeck et al 2006, Behling et al 2007. Moreover, the acknowledgement of fire disturbance as a crucial environmental factor to the very existence of subtropical grasslands is increasing (Quadros & Pillar 2001, Behling 2002, Behling et al 2004, Overbeck et al 2005.…”

Section: Introductionmentioning

confidence: 99%

“…The most extensive approach was presented by Aguiar et al (1986) concerning a preliminary floristic survey in ten granitic hills in Porto Alegre region. Boldrini et al (1998) surveyed floristic and ecological aspects of a grassland community at Morro da Polícia and Overbeck et al (2006) presented a local species list of Morro Santana, linking floristic composition of burned grassland to environmental factors, such as soil properties and distance from the forest border.…”

Section: Introductionmentioning

confidence: 99%

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Floristic and vegetation structure of a granitic grassland in Southern Brazil

Ferreira¹,

Müller²,

Boldrini³

et al. 2010

Rev. bras. Bot.

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-(Floristic and vegetation structure of a granitic grassland in Southern Brazil). A floristic and structural survey of a natural grassland community was conducted on Morro do Osso, a granitic hill in Porto Alegre, RS, Brazil. Structural data were surveyed in 39 one square meter plots placed over two major grassland areas. An accidental fire has occurred in one of the areas approximately one year prior to our survey, leading to further analysis of parameters differences between sites. The floristic list contains 282 species, whereas the structural survey has found 161 species. Families with highest accumulated importance values were Poaceae, Asteraceae and Fabaceae. The diversity and evenness indexes were 4.51 nats ind -1 and 0.86, respectively. Cluster analysis denoted two groups coinciding with the areas distinguished by the fire disturbance. A similarity analysis between our data and two other data sets from nearby granitic hills resulted in 28% to 35% similarity, with equivalent species-family distribution and many common dominant species, corroborating the concept of a continuous flora along the South Brazilian granitic hills.Key words -campos, diversity, fire, relict vegetation, similarity, threatened species RESUMO -(Florística e estrutura da vegetação de um campo granítico no Sul do Brasil). Um levantamento florístico e estrutural de uma comunidade de campo natural foi conduzido no Morro do Osso, um morro granítico em Porto Alegre, RS, Brasil. Os dados estruturais foram obtidos em 39 quadros de 1 m 2 , dispostos em duas grandes áreas de campo. Uma queimada acidental ocorreu em uma das áreas, aproximadamente um ano antes do levantamento, propiciando a análise de diferenças entre os parâmetros dos dois sítios de amostragem. A lista florística contém 282 espécies e, no levantamento estrutural, foram encontradas 161 espécies. As famílias com maior valor de importância acumulado foram Poaceae, Asteraceae e Fabaceae. Os índices de diversidade e a equabilidade foram 4,51 nats ind -1 e 0,86, respectivamente. A análise de agrupamento identificou dois grupos nítidos, que coincidem com os locais atingidos ou não pelo fogo. Uma análise de similaridade entre os dados obtidos e dois outros conjuntos de dados de morros graníticos vizinhos resultou em 28% a 35% de similaridade, com uma equivalente distribuição de espécies por família e muitas espécies dominantes comuns, corroborando a noção de continuidade da flora ao longo dos morros graníticos no sul do Brasil.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: °mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Floristic and vegetation structure of a granitic grassland in Southern Brazil

Ferreira¹,

Müller²,

Boldrini³

et al. 2010

Rev. bras. Bot.

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Odonate species occupancy frequency distribution and abundance–occupancy relationship patterns in temporal and permanent water bodies in a subtropical area

Renner

Dalzochio

Périco

et al. 2020

Ecology and Evolution

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This paper investigates species richness and species occupancy frequency distributions (SOFD) as well as patterns of abundance–occupancy relationship (SAOR) in Odonata (dragonflies and damselflies) in a subtropical area. A total of 82 species and 1983 individuals were noted from 73 permanent and temporal water bodies (lakes and ponds) in the Pampa biome in southern Brazil. Odonate species occupancy ranged from 1 to 54. There were few widely distributed generalist species and several specialist species with a restricted distribution. About 70% of the species occurred in <10% of the water bodies, yielding a surprisingly high number of rare species, often making up the majority of the communities. No difference in species richness was found between temporal and permanent water bodies. Both temporal and permanent water bodies had odonate assemblages that fitted best with the unimodal satellite SOFD pattern. It seems that unimodal satellite SOFD pattern frequently occurred in the aquatic habitats. The SAOR pattern was positive and did not differ between permanent and temporal water bodies. Our results are consistent with a niche‐based model rather than a metapopulation dynamic model.

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