Southern Bahian moist forests

Mori, Scott A.; Boom, Brian M.; Carvalho, A.M. de; Santos, Talmón S. dos

doi:10.1007/bf02861011

Cited by 301 publications

(212 citation statements)

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“…Embora o transecto tenha sido posicionado ao longo de um gradiente altitudinal, contribuindo à elevada diversidade observada, inventários regionais em matas ombrófilas situadas em áreas mais baixas e uniformes (e.g., Martini et al 2007, Mori et al 1983, Thomas et al 2008 apresentam medidas de diversidade semelhantes ou mais altas que a da RST. Estudos realizados em florestas semidecíduas do Sudeste e Sul do Brasil têm revelado valores de diversidade H' inferiores, geralmente entre 3,03 e 4,30 (Martins 1993, Metzger et al 1998, Jarenkow & Waechter 2001, Silva & Soares 2003 ou até inferiores a 2,50 (Durigan et al 2000).…”

Section: Resultsunclassified

“…Também neste grupo inclui-se Casearia decandra, considerada por MeiraNeto & Martins (2002) como indicadora de áreas de altitude do Sul e Sudeste do Brasil. Já Coussapoa curranii, Discocarpus pedicellatus e Ramisia brasiliensis, associadas às parcelas de cotas baixas, são elementos mais comuns em florestas estacionais no sul da Bahia, e não geralmente amostradas em florestas ombrófilas na região (Mori et al 1983, Amorim et al 2008, Thomas et al 2008.…”

Section: Resultsunclassified

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Composição florística e estrutura do componente arbóreo de uma área transicional de Floresta Atlântica no sul da Bahia, Brasil

et al. 2009

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-(Floristic composition and structure of the arboreal component of a transitional area of Atlantic forest in southern Bahia, Brazil). The purpose of this study was to attempt to detect a floristic transition in forest along an altitudinal gradient on a mountain side in southern Bahia, Brazil. The study site is located at the east-west transition from tropical moist to semideciduous forests. A belt transect of one hectare (10 × 1000 m) was established running up the slope (from ca. 350 m to 750 m elevation). All included trees and lianas ≥ 5 cm in diameter at breast height were numbered, collected, and measured. Density, dominance, frequency, and importance values (IV) were calculated for each species. We encountered 1400 individuals and 264 species of woody plants in 56 families. Cariniana legalis (Mart.) Kuntze had the highest IV, based on the dominance of a small number of trees. Discocarpus pedicellatus Fiaschi & Cordeiro and Ampelocera glabra Kuhlm. were the most frequent trees, with 90 and 86 individuals respectively. Ninety-six species were represented by a single individual. The Fabaceae and Myrtaceae were the most diverse families with 37 and 31 species respectively. Cluster analysis and correspondence analysis (DCA) revealed that the composition of the forest along the uppermost 30 percent of the transect was distinct from the rest. The lower and upper forests can be considered respectively as semideciduous and moist forests. Although there are some well-marked floristic differences between these forests, both clearly belong to the southern Bahian sector of the Atlantic coastal forests.Key words -altitudinal gradient, Atlantic coastal forest, Bahia, tropical semi-deciduous forest RESUMO -(Composição florística e estrutura do componente arbóreo de uma área transicional de Floresta Atlântica no sul da Bahia, Brasil). O objetivo deste estudo foi averiguar a existência de uma possível transição florística ao longo de um gradiente altitudinal numa floresta serrana do sul da Bahia, Brasil. A área amostrada situa-se em uma zona de transição (leste-oeste) entre florestas ombrófilas e estacionais. Um transecto linear abrangendo um hectare (10 × 1.000 m) foi situado na encosta da serra (de ca. 350 a 750 m.s.m.). Todas as árvores e lianas com DAP ≥ 5 foram numeradas, coletadas e medidas. Foram calculados valores de densidade, dominância, frequência e valor de importância (VI) para cada espécie amostrada. Foram amostrados 1.400 indivíduos agrupados em 264 espécies e 56 famílias de angiospermas. Cariniana legalis (Mart.) Kuntze teve o maior VI, devido à elevada dominância de poucos indivíduos. Discocarpus pedicellatus Fiaschi & Cordeiro e Ampelocera glabra Kuhlm. foram as espécies mais frequentes, com 90 e 86 indivíduos respectivamente. Noventa e seis espécies foram representadas por apenas um indivíduo. As famílias mais diversas foram Fabaceae e Myrtaceae com 37 e 31 espécies respectivamente. Análises de agrupamento e correspondência (DCA) revelaram que a composição florística da floresta situada na porção...

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Section: Resultsunclassified

Composição florística e estrutura do componente arbóreo de uma área transicional de Floresta Atlântica no sul da Bahia, Brasil

et al. 2009

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“…Importance values (IV) were calculated from inventory data for the aggregated sample incorporating measures of frequency, dominance (through basal area), and distribution (Mori et al, 1983).…”

Section: Discussionmentioning

confidence: 99%

Physiographic and floristic gradients across topography in transitional seasonally dry evergreen forests of southeast Pará, Brazil

Grogan

Galvão²

2006

Acta Amaz.

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Seasonally dry evergreen forests in southeast Pará, Brazil are transitional between taller closed forests of the interior Amazon Basin and woodland savannas (cerrados) of Brazil's south-central plains. We describe abiotic and biotic gradients in this region near the frontier town of Redenção where forest structure and composition grade subtly across barely undulating topography. Annual precipitation averaged 1859 mm between 1995-2001, with nearly zero rainfall during the dry season months of June -August. Annual vertical migrations of deep-soil water caused by seasonal rainfall underlie edaphic and floristic differences between high-and low-ground terrain. Low-ground soils are hydromorphic, shaped by perching water tables during the wet season, pale gray, brown, or white in color, with coarse texture, low moisture retention during the dry season, and relatively high macro-nutrient status in the surface horizons. Forest canopies on low ground are highly irregular, especially along seasonal streams, while overstory community composition differs demonstrably from that on high ground. High-ground soils are dystrophic, well-drained through the wet season, brown or red-yellow in color, with finer texture, higher moisture retention, and low macro-nutrient status in the surface horizons compared to low-ground soils. Forest canopies are, on average, taller, more regular, and more closed on high ground. Lowground areas can be envisioned as energy and nutrient sinks, where, because of hydrologic cycles, canopy disturbance likely occurs more frequently than at high-ground positions if not necessarily at larger scales.

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“…A Mata Atlântica tem sido reconhecida internacionalmente como de relevante valor biológico (Mori et al 1981, 1983a, Thomas et al 1998, sendo considerada um "hot-spot" por Myers (1998) e Myers et al (2000). A área entre os estados de São Paulo e Rio de Janeiro é considerada como uma das áreas de endemismo, bem como área de refúgio do pleistoceno por inúmeros autores.…”

Section: Implicações Para Conservaçãounclassified

Aspectos da composição e diversidade do componente arbóreo das florestas da Reserva Florestal do Morro Grande, Cotia, SP

et al. 2006

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The main objective of this study was to characterize the tree arboreal species composition and to compare secondary and mature forests of the Morro Grande Forest Reserve (Cotia, metropolitan region of São Paulo, Brazil). Based on this evaluation, we discuss the forest type classification and the conservation value of this Reserve. We used the point centered quarter method, sampling 2,400 trees in six different sites, three with secondary forests and three other ones with a predominance of mature forests. In each site, four blocks of 25 points were assessed, totalizing 100 points or 400 individuals. The blocks were 200 m apart from each other. Data were analyzed through cluster and Detrended Correspondence Analysis (DCA). Results showed differences among sites, essentially differentiating the secondary and mature sites. DCA and cluster analyses were particularly useful to detect characteristic species for these two main successsional stages. Among the 260 species observed, only 12 were sampled in the six sites. Richness and diversity were surprisingly high when compared with previous studies in the study region. The Shannon diversity values were among the highest in the state of São Paulo, with 4.75 nats/tree for the whole sampling, 4.25 nats/tree for the three secondary sites, and 4.54 nats/tree for the three mature sites. The studied forest may be essentially classified as "Dense Mountain Rain Forest" presenting species from the Araucaria mixed forest, and also from the semi-deciduous forest and Cerrado (woody savanna) region. Those results seem to confirm the hypothesis of a "high montane refuge" in drier climatic conditions in the past. The high richness and mixed composition of different floras highlighted the importance to preserve the Morro Grande forest.

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Southern Bahian moist forests

Cited by 301 publications

References 25 publications

Composição florística e estrutura do componente arbóreo de uma área transicional de Floresta Atlântica no sul da Bahia, Brasil

Composição florística e estrutura do componente arbóreo de uma área transicional de Floresta Atlântica no sul da Bahia, Brasil

Physiographic and floristic gradients across topography in transitional seasonally dry evergreen forests of southeast Pará, Brazil

Aspectos da composição e diversidade do componente arbóreo das florestas da Reserva Florestal do Morro Grande, Cotia, SP

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