Studies of the vegetation of a white-sand black-water igapó (Rio Negro, Brazil)

Keel, Shirley; Prance, Ghillean Τ.

doi:10.1590/1809-43921979094645

Cited by 98 publications

(33 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These results are comparable to varzea soil properties reported from the Brazilian Amazon by Furch (1997). Keel and Prance (1979) this forest was erroneously classified as igapo: the correct classification is varzea. c According to Klinge et al (1989) this forest was erroneously classified as varzea the right classification is igapo.…”

Section: Study Areasupporting

confidence: 85%

Structure and floristic composition of flood plain forests in the Peruvian Amazon

Nebel¹,

Kvist²,

Vanclay

et al. 2001

Forest Ecology and Management

126

View full text Add to dashboard Cite

Three Peruvian flood plain forests adjacent to the Ucayali river were sampled using nine 1 ha permanent sample plots in which stems exceeding 10 cm DBH were identified and measured. These plots were measured four times during 1993-1997. Three plots were established in each of the three forest types high restinga, low restinga, and tahuampa, characterised in part by an annual inundation of one, two and four months per year, respectively. Stem density varied from 446 to 601 per hectare, and the basal area ranged between 20 and 29 m 2 /ha. A total of 321 species were recorded in the nine hectare sample, with 88-141 species in each 1 ha plot. Species composition indicated a relatively low similarity between the forest types. Plots with the longest flooding contained the most species, expressed both as per unit area as well as per 1000 stems. The flood plain forests contained fewer tree species than adjacent non-flooded terra firme forest. Family importance values were calculated for each forest. In all three forests Leguminosae, Euphorbiaceae, Annonaceae and Lauraceae were important. The Moraceae family was conspicuous in both high restinga and low restinga. The Arecaceae and Meliaceae were notable in high restinga, as was Rubiaceae in low restinga. Lecythidaceae, Sapotaceae and Chrysobalanaceae exhibited relatively high values in the tahuampa forest. High species importance values were obtained for Maquira coriacea, Guarea macrophylla, Terminalia oblonga, Spondias mombin, Ceiba pentandra, Hura crepitans, Eschweilera spp., Canipsiandra angustifolia, Pouteria spp., Licania micrantha, Parinari excelsa and Calycophyllum spruceanum. Among the species of smaller stature, Drypetes amazonica, Leonia glycicarpa, Theobroma cacao and Protium nodulosum attained high values.

show abstract

Section: Study Areasupporting

confidence: 85%

Structure and floristic composition of flood plain forests in the Peruvian Amazon

Nebel¹,

Kvist²,

Vanclay

et al. 2001

Forest Ecology and Management

126

View full text Add to dashboard Cite

show abstract

“…Moreover, in our study, the oligarchic structure (the concentration of IV in a few species plus many species of lesser importance) found is also common in tropical forest formations, especially in disturbed or early successional communities (Keel & Prance 1979, Campbell et al 1986, Pascal & Pélissier 1996, and in other open vegetation types marginal to the Atlantic rain forest (Scarano 2002). Nevertheless, diversity (H' = 3.07) is expectedly lower than that of Atlantic (e.g, Sanchez et al 1999) and Amazon rain forests (e.g, Campbell et al 1992), but surprisingly high considering the extreme environmental conditions these plants are often subjected to (e.g., Scarano et al 2005).…”

Section: Mssupporting

confidence: 62%

Spatial variation in the structure and floristic composition of "restinga" vegetation in southeastern Brazil

Pimentel¹,

Barros²,

Cirne³

et al. 2007

Rev. bras. Bot.

View full text Add to dashboard Cite

-(Spatial variation in the structure and floristic composition of "restinga" vegetation in southeastern Brazil). We examined large-scale spatial variation of structural parameters and floristic composition in open Clusia scrub, a vegetation type of the Brazilian "restingas" (sandy coastal plain vegetation). This vegetation is organized in islands separated by sandy stretches with sparse herbaceous vegetation. We located 12 sample areas on three consecutive beach ridges, lying parallel to the coastline and at different distances from the ocean, in close proximity to two lagoons (Cabiúnas and Comprida). Each sample area was divided into three strips. We used the line intercept method to sample all woody plants ³ 50 cm tall. We used nested ANOVA to verify structural variation between different sampling scales. TWINSPAN analysis was performed to examine the variation in floristic composition between areas. The overall diversity index was 3.07. Six species are repeatedly dominant throughout the entire sampling area. There was homogeneity in relation to diversity and species richness between beach ridges but not within beach ridges. Floristic composition and structural parameters did not vary in relation to distance from the sea but floristic composition did vary as a function of proximity to Cabiúnas or Comprida lagoon. Differences in plant cover between sample areas may be related to the paleoformation of this sandy coastal plain.Key words -phytosociology, plant community, sampling scale, sandy coastal plain RESUMO -(Variação espacial na estrutura e composição florística de uma vegetação de restinga no Sudeste brasileiro). A variação em ampla escala espacial para parâmetros estruturais e composição florística foi examinada para uma formação aberta de Clusia, um tipo vegetacional das restingas brasileiras. Esta vegetação é organizada em moitas separadas por areia com esparsa vegetação herbácea. Foram levantadas 12 áreas amostrais em três cordões arenosos paralelos, às margens de duas lagoas costeiras (Cabiúnas e Comprida). Estes cordões estavam dispostos a diferentes distâncias do mar. Cada área amostral foi dividida em três faixas. Usamos o método de intercepto de linha para amostrar todas as plantas lenhosas ³ 50 cm de altura. Foi empregada ANOVA hierárquica para verificar a variação estrutural em diferentes escalas amostrais, e análise de TWINSPAN para examinar a variação na composição florística entre áreas. A diversidade total da área (H') foi de 3,07. Apenas poucas espécies foram repetidamente dominantes ao longo de toda a área amostral. Houve homogeneidade em relação à diversidade e riqueza de espécies entre cordões arenosos, mas não dentro destes cordões. Composição florística e parâmetros estruturais não variaram em relação à distância do mar, mas a composição florística variou em função da lagoa que margeava. As diferenças observadas na cobertura vegetal podem estar relacionadas com a história geológica desta área de restinga.

show abstract

“…Studies using multivariate techniques have further indicated that swamp forests differ floristically from flooded riparian forests, mainly due to differences in flooding regimes (Rodrigues & Nave 2004;Silva et al 2007). Even within a single site, differences in topography, flooding intensity and soil conditions affect the spatial distribution of species and promote phytosociological variation (Keel & Prance 1979;Vilela et al 2000;Sztutman & Rodrigues 2002;Damasceno-Junior et al 2005;Scarano 2006;Teixeira et al 2008). The floristic differences related to this great heterogeneity of ecological conditions were responsible for the low similarity between various Brazilian floodplain forests and the swamp forest studied here, as well as for the relatively high species richness found in our study area, in comparison with other swamps (Tab.…”

Section: Phytogeographic Relationshipsmentioning

confidence: 60%

Structure and phytogeographic relationships of swamp forests of Southeast Brazil

2013

View full text Add to dashboard Cite

Swamp forests are associated with soils that are saturated or inundated because of a high water table. In Brazil, little is known about the plant ecology of such forests. In this paper, we aimed to describe the phytosociological structure of the tree layer of swamp forests in Restinga de Jurubatiba National Park, in the northern part of the state of Rio de Janeiro, and to evaluate the floristic similarities between these forests and some other possibly related types of vegetation formations in Brazil. The sampling included 84 species, within 62 genera and 34 families. The Shannon diversity index was 3.42, and the Shannon evenness index was 0.77. The forests studied showed an oligarchic structure; Tapirira guianensis, Calophyllum brasiliense and Protium icicariba were the most important species. Oligarchy, or monodominance, and relatively low species richness are the norm in the swamp forests of southeastern Brazil and result from the strong selective character of the saturated/inundated soils. In comparison with local areas of restinga (coastal woodland), Atlantic Forest sensu stricto, other swamp forests and flooded riparian forests, the similarity was low (Jaccard similarity coefficient < 0.25). In addition to the similar ecological conditions, geographic proximity was a key factor determining the patterns of similarity found. Our results indicate that the swamp forests of southeastern Brazil do not represent a distinguishable floristic unit, due to sources of local variation, notably migration and the establishment of adaptive species from neighboring vegetation formations (some 70% of the species surveyed).

show abstract

Studies of the vegetation of a white-sand black-water igapó (Rio Negro, Brazil)

Cited by 98 publications

References 0 publications

Structure and floristic composition of flood plain forests in the Peruvian Amazon

Structure and floristic composition of flood plain forests in the Peruvian Amazon

Spatial variation in the structure and floristic composition of "restinga" vegetation in southeastern Brazil

Structure and phytogeographic relationships of swamp forests of Southeast Brazil

Contact Info

Product

Resources

About