Relação entre a altura de inundação, riqueza específica de plantas e o tamanho de clareiras naturais em uma floresta inundável de igapó, na Amazônia Central

Ferreira, Leandro Valle; Almeida, Samuel

doi:10.1590/s0100-67622005000300012

Cited by 19 publications

(18 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In comparison, our results suggested that the species richness was significantly lower in igapó forests (21.9 species/ha) than in várzea forests. In addition, the igapó showed higher β‐diversity values than other várzea forests (Ferreira & Almeida, ; see low Sørensen similarity found for all localities—), suggesting that the richness increased significantly with the geographic distance. However, in our study, the sampled area of várzea forests was approximately four times larger than the sampled area of the igapó forests.…”

Section: Discussionmentioning

confidence: 84%

Distribution and β‐diversity of tree species in igapó forests (Negro River basin, Brazilian Amazon)

Scudeller

Vegas‐Vilarrúbia

2018

J Vegetation Science

View full text Add to dashboard Cite

Questions How are the tree species of the periodically flooded black water forest distributed along the Negro River basin (igapó)? Can we classify the tree communities into similarity groups? Are oligarchic species present? Methods We analysed available data on tree species composition in vegetation plots located in the Negro River basin (igapó forests) in Brazil and built a similarity matrix based on Sørensen's similarity index. We applied principal coordinates analysis, established community groups (a posteriori) and applied both multi‐response permutation procedures and indicator species analysis. Results Among 19 surveys conducted in igapó forests, at least 604 woody taxa were recognized, and 384 taxa were identified to species level. Igapó tree species were not as frequent or abundant as were other tree species of the Amazon upland forest, although they were widely distributed in other forest types. The Sørensen similarity index was low (Ss = 0.16). Generally, the highest similarity values were recorded between surveys that were spatially close. The multivariate analyses suggested the existence of a strong vegetation gradient along the Negro River. The two groups established a posteriori showed 25 species with an indicator value (IV) >50%, and 68 species presented IndValues in both groups. Conclusions Our results show a strong turnover of tree species replacement along the course of the Negro River, with 57.5% of species restricted to one survey of occurrence. This trend is particularly notable from the point at which the Branco River strongly discharges into the Negro River. No species show high values for range distribution or local abundance, although four were considered moderately frequent. The upper parts of the main rivers have indicator species that are less frequent downstream.

show abstract

Section: Discussionmentioning

confidence: 84%

Distribution and β‐diversity of tree species in igapó forests (Negro River basin, Brazilian Amazon)

Scudeller

Vegas‐Vilarrúbia

2018

J Vegetation Science

View full text Add to dashboard Cite

show abstract

“…Many studies have shown that within these forest types, flooding is considered the major factor in determining the variation in structure and floristic composition, in which diversity decreases as flooding level (and/or timing) increases (e.g. Ferreira & Stohlgren ; Ferreira & Almeida ; Wittmann et al. ; Assis & Wittmann ).…”

Section: Introductionmentioning

confidence: 99%

“…However, in the Rio Negro basin, extensive plains are flooded due to poor drainage of sandy soils (spodzols; superficial rock beds) and water infiltration of periodically flooded river margins (Ab'saber ). In the floodplains, Campinarana and Igapó vegetation structure has been associated with such flooding or a rise in groundwater during wet seasons (Ferreira & Almeida ; Jirka et al. ).…”

Section: Introductionmentioning

confidence: 99%

Disentangling the role of edaphic variability, flooding regime and topography of Amazonian white‐sand vegetation

Damasco

Vicentini

Castilho

et al. 2012

J Vegetation Science

View full text Add to dashboard Cite

Question How much variation in plant community structure and composition can be predicted using soil, flooding and topography in white‐sand vegetation of northern Amazonia? Location Brazil, northern Amazon, Roraima State, Viruá National Park (01°46′34″ N, 61°02′06″ W). Methods Data from 17, 1‐ha permanent plots distributed across a 25 km2 landscape within the Viruá National Park, northern Amazonia, was used to assess the soil, flooding and topography effects on tree species composition, diversity and structure. Our analyses were based on 16 599 trees (DBH ≥ 1 cm) belonging to 303 species. Principal components analysis (PCA) was used to reduce the dimensionality of soil variables, whereas dimensionality of floristic composition assemblage was reduced using non‐metric multidimensional scaling (NMDS). Multiple regression analysis was used to test combined effects of soil, flooding and topography on floristic composition, diversity, basal area and tree density. Results Depending on the diameter class or the type of data (qualitative or quantitative), NMDS axis 1 explained 45–84% of total variation in species composition among plots. The first and second axes from PCA explained, respectively, 54.8% and 15.1% of the variation related to soil gradients. Soil texture and fertility (PCA axis 1) were the most important predictors of the variation in tree composition, diversity and structure for the three different size classes analysed (DBH ≥ 1 cm, 1 cm ≤ DBH ≤ 9.9 cm and DBH ≥ 10 cm). Overall, plots on more fertile clayey soils showed higher tree diversity and basal area than those on well‐drained sandy soils. Although flooding had little effect on the tree community, the water level was higher in high‐stature forests established on more clayey and fertile soils. Conclusions Even though soils in the study area are predominantly sandy and oligotrophic, our findings highlight the importance of soil in structuring plant communities of seasonally flooded white‐sand vegetation at mesoscales in the Amazon Basin.

show abstract

“…Species richness and composition, structure (Ferreira 2000), total area, number and composition of species of canopy gap regenerations (Ferreira and Almeida 2005) and phenological events of tree species of lowland forests in Central Amazon (Ferreira and Parolin 2007) vary with flood suscetibility, where typical plant communities develop in response to their adaptation to fl ood.…”

Section: Vegetation Faciesmentioning

confidence: 99%

Flood regime and water table determines tree distribution in a forest-savanna gradient in the Brazilian Pantanal

Ferreira-Júnior

Schaefer

Cunha

et al. 2016

An. Acad. Bras. Ciênc.

View full text Add to dashboard Cite

This study aimed to recognized the preferential location of species of the tree sinusiae in response to a moisture gradient in Pantanal Matogrossense, Brazil. We established sampling plots of arboreal sinusiae along a soil moisture and fl ood gradient. Piezometers were installed, allowing monthly measurements of water table depth and fl ood height during one year. Detrended Correspondence Analysis, Gradient Direct Analysis, Multi-response Permutation Procedures and Indicator Species Analysis were performed to evaluate the effect of moisture gradient on tree distribution. The annual variation of water table is shallower and similar in Seasonally Flooded Forest and Termite Savanna, with increasing depths in Open Savanna, Savanna Forest and Dry Forest. Circa 64% of the species were characterized as having a preferential location in "terrestrial habitats normally not subjected to inundation", while 8% preferentially occur in "wet habitats". Lowest tree richness in fl ood-affected vegetation types is related to both present-day high climatic seasonality and Late Pleistocene dry paleoclimates in the Pantanal wetland. The tree distribution across different formations in the Pantanal shows a direct relationship with soil moisture gradient.

show abstract

Relação entre a altura de inundação, riqueza específica de plantas e o tamanho de clareiras naturais em uma floresta inundável de igapó, na Amazônia Central

Cited by 19 publications

References 13 publications

Distribution and β‐diversity of tree species in igapó forests (Negro River basin, Brazilian Amazon)

Distribution and β‐diversity of tree species in igapó forests (Negro River basin, Brazilian Amazon)

Disentangling the role of edaphic variability, flooding regime and topography of Amazonian white‐sand vegetation

Flood regime and water table determines tree distribution in a forest-savanna gradient in the Brazilian Pantanal

Contact Info

Product

Resources

About