Southeast Brazil

Safford, Hugh D.; Martinelli, Gustavo

doi:10.1007/978-3-642-59773-2_17

Cited by 40 publications

(45 citation statements)

References 25 publications

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“…Rock outcrops of gneiss-granite, as well as their intermediate forms found in the Brazilian southeast, are classified as rock outcrops of coastal areas, such as the Sugar Loaf Mountain in Rio de Janeiro (RJ), and rock outcrops of highland mountainous inland areas, such as those found in "Serra do Mar" and "Serra da Mantiqueira" (Safford & Martinelli 2000).…”

Section: Introductionmentioning

confidence: 99%

“…In these "Campos de Altitude", different vegetation synusiae form a mosaic in which shrubs within a matrix of bunchgrasses with sparsely spread herbs and pteridophytes are the most frequent physiognomy found in the relatively extensive plateaux (Safford 1999 are also elements of high altitude landscapes (Safford & Martinelli 2000).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Deeper and wider rock pools, with a few centimeters of substratum, provide a water reservoir throughout the year to support a great variety of aquatic plants (Barthlott et al 1993, Safford & Martinelli 2000. However, granitic outcrops of Southeast Brazil only seldomly contain such perennial pools (Safford & Martinelli 2000). Another microhabitat type, the monocotyledonous mats, is primarily formed by species tolerant to dehydration that are able to establish themselves and grow into dense tussocks directly on the bare rock (Barthlott et al 1993, Safford & Martinelli 2002, Medina et al 2006.…”

Section: Introductionmentioning

confidence: 99%

“…Depending on mat size, a shrub-mat complex can be formed, which represents an intermediate phase between rock surfaces and adjacent forest formations (Ibisch et al 1995). Another life form associated to monocotyledonous mats and their great water storage capacity is a group of ephemeral species known as "ephemeral and wet flush vegetation" (Barthlott et al 1993, Safford & Martinelli 2000. Finally, shallow depressions also form microhabitats characterized by accumulating 5 to 12 cm of soil (humic substances) and disaggregated rock material, where grass type vegetations seem to be dominant (Safford & Martinelli 2000).…”

Section: Introductionmentioning

confidence: 99%

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Structural analysis of the vegetation on a highland granitic rock outcrop in Southeast Brazil

Caiafa¹,

Silva²

2007

Rev. bras. Bot.

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-(Structural analysis of the vegetation on a highland granitic rock outcrop in Southeast Brazil). Granitic rock outcrops of the Brazilian southeast are either coastal or inland. The latter can often have high altitudes, such as in the summits of "Serra do Mar" and "Serra da Mantiqueira", where they are known as "Campos de Altitude". The landscape on these high altitude plateaux is often a mosaic of shrubs and treelets within a bunchgrass matrix, with sparse pteridophytes and other herbs, interspersed with variable extensions of rock outcrops. Despite the pervasiveness of rock outcrops in the Brazilian landscape, studies on the structural analysis of the vegetation on such formations are scarce. This study aimed to analyze the structure of the vegetation on a highland granitic rock outcrop in "Parque Estadual da Serra do Brigadeiro", state of Minas Gerais, Southeast Brazil (42°20' -42°40' S and 20°20' -21°00' W, 1,722 m of elevation ). Quantitative parameters of absolute and relative frequency and dominance (cover) were estimated. The group analysis used the Jaccard similarity index. Trilepis lhotzkiana, Panicum sp. 1, and Vellozia variegata presented the highest relative frequencies, relative dominances and importance values. These three species, along with Dyckia bracteata, Rhynchospora emaciate, and Tibouchina cf. manicata, represented 98.3% of the relative dominance. The remaining 1.7% referred to 22 remaining species. The distinction among quadrats within formed groups by cluster analysis was due to the great number of low frequency species.Key words -high altitude vegetation, photographic chart method, rock outcrop, "Parque Estadual da Serra do Brigadeiro", structural analysis RESUMO -(Análise estrutural da vegetação sobre um afloramento rochoso granítico de altitude no Parque Estadual da Serra do Brigadeiro, Minas Gerais, Brasil). Os afloramentos rochosos graníticos do sudeste brasileiro ocorrem no litoral ou no interior. Neste segundo caso, incluem-se os Campos de Altitude, como aqueles encontrados nos cumes das Serras do Mar e da Mantiqueira. A fisionomia mais freqüentemente encontrada nos platôs é composta de mosaicos de arbustos e arvoretas, inseridos em uma matriz de touceiras de gramíneas, com pteridófitas e outras ervas dispostas espaçadamente, além de extensões variáveis de afloramentos rochosos. Apesar de freqüentes na paisagem brasileira, são escassos os trabalhos de análise estrutural da vegetação sobre afloramentos rochosos. O objetivo deste trabalho foi analisar a estrutura da vegetação sobre um afloramento rochoso granítico de altitude no Parque Estadual da Serra do Brigadeiro, MG (42°20' -42°40' S e 20°20' -21°00' W, 1.722 m de altitude). Foram estimados os parâmetros quantitativos de freqüência e dominância (cobertura), absolutas e relativas. A análise de agrupamento utilizou o índice de similaridade do Jaccard. Trilepis lhotzchiana, Panicum sp. 1 e Vellozia variegata apresentaram as maiores freqüências relativas, dominâncias relativas e os maiores valores de importância. Essas trê...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Structural analysis of the vegetation on a highland granitic rock outcrop in Southeast Brazil

Caiafa¹,

Silva²

2007

Rev. bras. Bot.

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Inselbergs

Physiological Ecology of Tropical Plants

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Can campo rupestre vegetation be floristically delimited based on vascular plant genera?

Alves¹,

Kolbek

2009

Plant Ecol

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A number of floristic and vegetation studies apply the terms campo rupestre, campo de altitude (or Brazilian pa´ramo), and Tepui to neotropical azonal outcrop and montane vegetation. All of these are known to harbor considerable numbers of endemic plant species and to share several genera. In order to determine whether currently known combinations of vascular plant genera could help circumscribe and distinguish these vegetation types, we selected 25 floras which did not exclude herbs and compiled them into a single database. We then compared the Sørensen similarities of the genusassemblages using the numbers of native species in the resulting 1945 genera by multivariate analysis. We found that the circumscription of campo rupestre and other Neotropical outcrop vegetation types may not rely exclusively on a combination of genera.

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Southeast Brazil

Cited by 40 publications

References 25 publications

Structural analysis of the vegetation on a highland granitic rock outcrop in Southeast Brazil

Structural analysis of the vegetation on a highland granitic rock outcrop in Southeast Brazil

Inselbergs

Can campo rupestre vegetation be floristically delimited based on vascular plant genera?

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