Species-environment relationship in the herb-subshrub layer of a moist Savanna site, Federal District, Brazil

Munhoz, Cássia Beatriz Rodrigues; Felfili, Jeanine Maria; Rodrigues, Cristiane

doi:10.1590/s1519-69842008000100005

Cited by 23 publications

(14 citation statements)

References 14 publications

(22 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Organic matter content contributes to the solid soil phase in swamp areas by increasing soil aeration (RAMOS et al, 2006). Soil water saturation can limit the establishment of some species and favor species that are better adapted to wetter conditions (MUNHOZ et al, 2008). This pattern was observed in the preserved site, where poorly drained soils were associated with higher species richness compared to the more well-drained soils at the impacted site.…”

mentioning

confidence: 74%

Structure of Natural Regeneration in Relation to Soil Properties and Disturbance in Two Swamp Forests

Ávila

Souza

Veloso

et al. 2016

CERNE

View full text Add to dashboard Cite

Veredas (palm swamps) is a type of vegetation associated with watercourses, characterized by the presence of Mauritia flexuosa palm trees. These systems are not well understood and suffer from high anthropogenic pressure. The aims of this study were to describe the natural regeneration of two swamp forests in vereda systems with different anthropogenic impacts and investigate if the variation in these plant communities are associated to edaphic conditions. The study was performed in preserved and impacted sites located in the Environmental Protection Area of the Pandeiros River in northern Minas Gerais. At each site, one hundred 25 m 2 plots were established for surveying regenerating shrubs and trees (≥1 cm diameter at the base of the stem and < 3 cm diameter at breast height). Vegetation structure was evaluated by phytosociological parameters, similarity index, and size distribution of individuals. Regenerating strata was correlated with chemical and physical soil analyses. The vegetation at the preserved site was characterized by a higher number of individuals and a lower diversity but contained species that were typical of flooded areas. The results also showed differences in soil nutrient availability between sites that influenced the distribution of species at the two study sites. ESTRUTURA DA REGENERAÇÃO NATURAL EM RELAÇÃO ÀS PROPRIEDADES DO SOLO E DISTÚRBIO EM DUAS FLORESTAS HIGRÓFILAS RESUMO:As veredas são um tipo de vegetação associada aos cursos d'água, caracterizada pela presença da palmeira arbórea Mauritia flexuosa. Estes sistemas não são bem compreendidos e sofrem grande pressão antrópica. Os objetivos deste estudo foram descrever a regeneração natural de duas florestas higrófilas em sistemas de veredas com diferentes impactos antropogênicos e investigar se a variação nesta comunidade de plantas está associada as condições edáficas. O estudo foi realizado em sítios preservado e impactado localizado na área de Proteção Ambiental do rio Pandeiros, norte de Minas Gerais. Em cada sítio, 100 parcelas de 25 m 2 foram estabelecidas para o levantamento dos arbustos e árvores regenerantes (≥1 cm de diâmetro na base do caule e < 3 cm de diâmetro na altura do peito). A estrutura da vegetação foi avaliada pelos parâmetros fitossociológicos, índice de similaridade e distribuição de tamanhos dos indivíduos. O estrato regenerativo correlacionou com as análises químicas e físicas do solo. A vegetação no sítio preservado foi caracterizada por um maior número de indivíduos e menor diversidade, mas continha espécies típicas de ambientes alagados. Os resultados também mostraram diferenças na disponibilidade de nutrientes do solo entre os sítios que influenciaram a distribuição de espécies nas duas áreas estudadas.

show abstract

mentioning

confidence: 74%

Structure of Natural Regeneration in Relation to Soil Properties and Disturbance in Two Swamp Forests

Ávila

Souza

Veloso

et al. 2016

CERNE

View full text Add to dashboard Cite

show abstract

“…The wet grassland adjacent to the dry-shrub grassland has a hydromorphic soil with a shallow water table, featuring areas of temporary flooding in the rainy season and permanent ones in the depressions. The wet grassland also features acid soil (pH 3.76) ) (Munhoz et al 2008).…”

Section: Study Sitementioning

confidence: 99%

“…Wet grasslands (Campo limpo úmido) can be found in various topographic positions, with different variations in humidity, depth and soil fertility conditions (Munhoz et al 2008). This physiognomy rarely occurs in flat areas with deep soils, but is common in Central Brazil, on the slopes of plateaus and alongside "veredas" (palm swampy vegetation) (Ribeiro and Walter 2008).…”

mentioning

confidence: 99%

“…This physiognomy rarely occurs in flat areas with deep soils, but is common in Central Brazil, on the slopes of plateaus and alongside "veredas" (palm swampy vegetation) (Ribeiro and Walter 2008). The wet grasslands occur on the edge of gallery forests, seasonally flooded soils in valley bottoms, especially on hydromorphic soils and peaty organic soils (Felfili et al 2005), with gradations of humidity and segments where the water table is shallow (Munhoz et al 2008).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Vascular flora in dry-shrub and wet grassland Cerrado seven years after a fire, Federal District, Brazil

Amaral¹,

Munhoz²,

Eugênio³

et al. 2013

View full text Add to dashboard Cite

Studies of temporal dynamics for grassland sites report that fire suppression plays a crucial role in floristic changes. The objective of this study was to verify whether after seven years without fire, communities showed variations in terms of composition, life forms, pollination and dispersal syndromes. The first survey (T0) was conducted from September 1999 to October 2000, while the second (T1) took place from August 2006 to August 2007. The floristic results in T1 were compared with the survey in T0 through the Sorensen similarity index and Chi-square tests. Over time, there were differences in the composition, life forms and pollination and dispersion syndromes. The evidence of changes suggests that the frequency of the fire regime can be considered the main agent for change in the flora of these communities.

show abstract

“…For example, (1) microhabitats can have specific microclimatic and edaphic characteristics that allow the establishment of particular species, including rare species, and reduce the densities of generalist populations from nearby microhabitats (Alcoforado-Filho et al, 2003;Araújo et al, 2005;Fulbright, 2004;Lemos and Rodal, 2002;Reis et al, 2006;Silva et al, 2009); (2) variations in soil texture and the availability of nutrients help determine the species composition and vegetation types (Aarrestad et al, 2011;Amorim and Batalha, 2008;Araújo et al, 1999;Cañadas et al, 2010;He et al, 2007;Morgenthal et al, 2006;Ramírez et al, 2007); (3) soils with a higher water retention capacity allow increased biomass and ground cover (Alhamad et al, 2010;Munhoz et al, 2008); (4) the composition and structure of herbaceous plant communities growing under the canopy of woody species may be distinct from those in open areas due to litter fall, light interception and changes in nutrient availability (Cabin and Marshall, 2000;Fuller, 1999). Consequently, the vegetation community structure may be very different even among microhabitats in close proximity.…”

Section: Introductionmentioning

confidence: 99%

Spatial variation in the structure and composition of the herbaceous community in a semiarid region of northeastern Brazil

Silva

Santos

et al. 2013

Braz. J. Biol.

View full text Add to dashboard Cite

In the arid and semiarid environments of the world, microhabitats serve as models for the structure of vegetation communities. The goal of this study was to identify differences in the structures of the herbaceous communities growing on a crystalline substrate and those growing on a sedimentary substrate in a semiarid region of northeastern Brazil. One hundred 1 × 1 m plots were established in each area for quantitative sampling, with 69 species recorded in the crystalline area and 76 in the sedimentary area. The average plant density was higher in the sedimentary area, and average diameters and heights were greater in the crystalline area. The families and species with a high Importance Value Index (IVI) and a high Mixed Ecological Value Index (MEVI) differed between the areas. Of the species with high densities, only four were found in both areas. Shannon-Weiner diversity index values in the crystalline (2.96 nats/ind.-1 ) and sedimentary (2.89 nats/ind. ) areas were similar. Evenness values on both substrates were also similar (0.72 and 0.71 in the crystalline and sedimentary areas, respectively). This study shows that variations in plant establishment conditions between crystalline and sedimentary areas in a semiarid region of northeastern Brazil should be considered as structure-modeling factors for the herbaceous community.Keywords: dry forest, phytosociology, herb, soil, caatinga, microhabitat. Variação espacial na estrutura da comunidade herbácea em uma região semiárida do Nordeste do Brasil ResumoNos ambientes áridos e semiáridos do mundo, os micro-habitats modelam a estrutura das comunidades vegetais. O objetivo deste estudo foi identificar diferenças nas estruturas das comunidades herbáceas instaladas sobre o solo do embasamento cristalino e a bacia sedimentar em uma região semiárida do Nordeste do Brasil. Foram estabelecidas 100 parcelas de 1 × 1 m em cada área para amostragem das comunidades. Foram registradas 69 espécies na área cristalina e 76 na área sedimentar. A densidade média das plantas foi maior na área sedimentar e os diâmetros e as alturas médias foram maiores na área cristalina. As famílias e as espécies com maior Índice ) e sedimentar (2,89 nats/ind.-1 ) foram semelhantes. Os valores de equabilidade, em ambas as áreas, também foram semelhantes (0,72 e 0,71, nas áreas cristalina e sedimentar, respectivamente). Este estudo mostra que as variações nas condições de estabelecimento das plantas entre áreas cristalinas e sedimentares, em uma região semiárida do Nordeste do Brasil, devem ser consideradas como um fator modelador da estrutura das comunidades herbáceas.

show abstract

Species-environment relationship in the herb-subshrub layer of a moist Savanna site, Federal District, Brazil

Cited by 23 publications

References 14 publications

Structure of Natural Regeneration in Relation to Soil Properties and Disturbance in Two Swamp Forests

Structure of Natural Regeneration in Relation to Soil Properties and Disturbance in Two Swamp Forests

Vascular flora in dry-shrub and wet grassland Cerrado seven years after a fire, Federal District, Brazil

Spatial variation in the structure and composition of the herbaceous community in a semiarid region of northeastern Brazil

Contact Info

Product

Resources

About