Sérgio Lopes | University State of Paraiba - UEPB - Brazil (original) (raw)
Papers by Sérgio Lopes
Caminhos de Geografia, 2013
The woodland (Cerradão) is considered one of the most threatened ecosystems in the wo... more The woodland (Cerradão) is considered one of the most threatened ecosystems in the world, mainly by constantly advancing of agricultural and urbanization. This physiognomy shares species from the Cerrado sensu stricto and forest formations of the Cerrado biome (Brazilian savanna). This study evaluated the floristic composition and structure of arboreal vegetation, as well as the dispersal syndromes of species in a remnant of woodland, located in Uberlândia, MG. There were sampled 25 plots (20 x 20 m), totaling 1 ha. We sampled 1353 individuals, from 74 species and 35 families. The total basal
area was 13.63 m2.ha-1. Families and species most representatives are considered typical for this vegetation type. The main dispersion syndrome was zoochory, typical of
tropical forests, but the anemochory, very common in savannas, was also fairly representative. Our results showed the dichotomy of floristic diversity and functional traits of woodland, presenting both functional and floristic similarities with forest physiognomies as savanna physiognomies. This complexity increases its importance for the maintenance of biodiversity in the Cerrado and praises efforts to conserve them.
Revista de Biología Tropical, 2013
"Local changes caused by dams can have drastic consequences for ecosystems, not only because they... more "Local changes caused by dams can have drastic consequences for ecosystems, not only because they change the water regime but also the modification on lakeshore areas. Thus, this work aimed to determine the changes in soil moisture after damming, to understand the con-sequences of this modification on the arboreal community of dry forests, some of the most endangered systems on the planet. We studied these changes in soil moisture and the arboreal community in three dry forests in the Araguari River Basin, after two dams construction in 2005 and 2006, and the potential effects on these forests. For this, plots of 20m x10m were distributed close to the impoundment margin and perpendicular to the dam margin in two deciduous dry forests and one semi-deciduous dry forest located in Southeastern Brazil, totaling 3.6ha sampled. Besides, soil analysis were undertaken before and after impoundment at three different depths (0-10, 20-30 and 40-50cm). A tree (minimum DBH of 4.77cm) community inventory was made before (T0) and at two (T2) and four (T4) years after damming. Annual dynamic rates of all communities were calculated, and statistical tests were used to determine changes in soil moisture and tree communities. The analyses confirmed soil moisture increases in all forests, especially during the dry season and at sites closer to the reservoir; besides, an increase in basal area due to the fast growth of many trees was observed. The highest turnover occurred in the first two years after impoundment, mainly due to the higher tree mortality especially of those closer to the dam margin. All forests showed reductions in dynamic rates for subsequent years (T2-T4), indicating that these forests tended to stabilize after a strong initial impact. The modifications were more extensive in the deciduous forests, probably because the dry period resulted more rigorous in these forests when compared to semideciduous forest. The new shorelines created by damming increased soil moisture in the dry season, mak-ing plant growth easier. We concluded that several changes occurred in the T0-T2 period and at 0-30m to the impoundment, mainly for the deciduous forests, where this community turned into a “riparian-deciduous forest” with large basal area in these patches. However, unlike other transitory disturbances, damming is a permanent alteration and transforms the landscape to a different scenario, probably with major long-term consequences for
the environment."
Biotemas, 2013
This study was carried out in a semideciduous forest in Southeastern Brazil. Five ecological attr... more This study was carried out in a semideciduous forest in Southeastern Brazil. Five ecological attributes were used to define the functional groups: dominant stratum of the species, light demand of the plant, seed dispersal, likely pollinator, and deciduousness. The groups were formed through a species matrix and its attributes, and they were delimited according to the Jaccard similarity coefficient and a dendrogram generated by the group average (UPGMA). The analysis used was satisfactory, indicating the formation of four coherent groups with distinct functions both with regard to the community and the ecosystem. The results indicate a tree community in a late successional stage, with relations between flora and fauna species.
International Journal of Forestry Research, 2012
We examined floristic patterns of ten seasonal semideciduous forest sites in southeastern Brazil a... more We examined floristic patterns of ten seasonal semideciduous forest sites in southeastern Brazil and conducted a central sampling
of one hectare for each site, where we took samples and identified all individual living trees with DBH (diameter at breast
height, 1.30 m) ≥ 4.8 cm. Arboreal flora totaled 242 species, 163 genera, and 58 families. Fabaceae (38 species) and Myrtaceae
(20 species) were families with the largest number of species. Only Copaife ra lang s dor ffii and Hy me naea courbar il occurred at
all sites. Multivariate analysis (detrended correspondence analysis and cluster analysis) using two-way indicator species analysis
(TWINSPAN) indicated the formation of a group containing seven fragments in which Sipar una guiane nsis was the indicator
species. This analysis revealed that similarities between studied fragments were due mainly to the successional stage of the
community.
Brazilian Geographical Journal: Geosciences and Humanities research medium, 2012
Historical review of studies in seasonal semideciduous forests in Brazil: a perspective for... more Historical review of studies in seasonal semideciduous forests
in Brazil: a perspective for conservation - Biodiversity
conservation is one of the biggest challenges faced this
century, due to the high level of human disturbance in
natural ecosystems. The seasonal semideciduous forests
(SSF) have suffered the same degradation process as other
Brazilian ecosystems. Given this context, this study aimed to
review the literature regarding the classification,
characterization and distribution of SSF in Brazil, and to
present a historical review of previous studies. In the early
1980s and, for a period of 15 years, floristics and phytosociological studies dominated scientific research,
basically describing and comparing different forest remnants.
From mid-1990, new studies were developed using other
approaches. These studies not only initiated new lines of
research, but also gradually increased the emphasis on
floristic analysis, with the outcome of establishing new
hypotheses and more defined links of cause and effect
between the structural aspects of vegetation and
environmental factors, both functional and
phytogeographical.
Bioscience Journal, 2012
The present study aimed to determine the floristic, structural and ecological between ... more The present study aimed to determine the floristic, structural and ecological between physiognomies in a Cerrado emnant, Monte Carmelo, MG. From the phytossociological survey, we assessed the ecological patterns related to the species dispersion guilds and deciduousness. The floristic similarity between the physiognomies was parsed using quantitative and qualitative data (presence/absence) through the Jaccard similarity coefficient and Morisita-Horn indice. The urban remnant presented four vegetable physiognomies, classified in semideciduous seasonal forest, stricto sense cerrado, cerradão and gallery forest. We sampled 153 species, distributed in 49 families. The semideciduous forest covers the largest portion of the Park and has the greatest diversity of species. The gallery forest presented the less diversity, having as main representatives species adapted to conditions of hydromorphic soil. The predominance of zoochoric species in four physiognomies confirms the importance of biological agents on gene flow of these formations. The highest percentage of species anemochoric was found in the stricto sense cerrado and cerradão. The floristic similarity between the physiognomies present in urban remnant is low, demonstrating that small environmental variations reflect major floristic changes. Each physiognomies has its peculiarities, not only in relation to physical conditions, but also in relation to fundamental ecological processes, such as biological diversity and interaction with the fauna disperser, which may explain the great beta diversity found in the Cerrado biome.
Rodriguésia, 2012
Urban parks have a strategic importance fot the quality of life in urban centers, contributing to... more Urban parks have a strategic importance fot the quality of life in urban centers, contributing to significant environmental and social services. Knowledge of forest structure has helped to subsidize the maintenance of these parks. Based on the phytosociological analysis of tree species in a semideciduous forest fragment (120 ha), this study assessed the conservation status of this remnant. We sampled all trees with CBH >
15 cm, present in 25 permanent plots (20 × 20 m), and classified the species as to successional groups and dispersal syndromes. We recorded 798 individuals in 98 species belonging to 37 families. Early secondary species had the highest values of species richness , density and importance value, followed
by late secondary species with the highest dominance, and pioneer species with low representation. Regarding the dispersal syndrome, over 77% of the community is represented by species with zoochoric dispersal. These results increase the valuation of the “Parque da Matinha”, reaffirming the importance of this urban park for the conservation of native fauna and flora, and supporting the need for public policies of park use by visitors.
Biotemas, 2012
The goal of this work was to evaluate the biological diversity in an urban forest remnant to bett... more The goal of this work was to evaluate the biological diversity in an urban forest remnant to better understand
the structure of the community and ecological processes that are important for the conservation of these fragile
ecosystems. The study was carried out in a fragment of seasonal semideciduous forest, with a long history of human disturbance, which is located in an urban area of Uberlândia, Minas Gerais. Samples from 25 (20x20m)
plots were assessed, which included all individuals with a circumference at breast height (CBH) > 15cm. The
species were classified based on successional group and dispersal syndrome. A total of 958 trees, from 69 species
and 35 families, were recorded. The group of early secondary species presented higher values for all of the
phytosociological parameters, followed by the late secondary species. The results suggest that the fragment is in
an intermediate stage of successional development. Frequent and intense anthropogenic disturbance caused by the
periodic removal of litter and tree, shrub and herb seedlings, to maintain an area for recreation, is compromising
the regeneration of the species in this forest and thus hindering the slow process of regeneration of the remnant
towards more mature stages of succession.
Caminhos de Geografia, 2012
The phytosociological survey was realized in a semideciduous forest fragment located i... more The phytosociological survey was realized in a semideciduous forest fragment located in the legal reserve of São Pedro-Itaú Farm, Uberlândia - MG. This study analyzed one hectare of the fragment using 25 permanent plots of 20 x 20 m, where all the alive tree individuals with perimeter at breast height higher than 15 cm were included and identified. The species were classified as successional groups and dispersal syndromes. Were sampled 1144 individuals in 103 species and 41 families. The value of equability and Shannon’s diversity were 0.83 and 3.87, respectively. In this fragment 17% were pioneer species, 49% early secondary species and 34% late secondary species, demonstrating an intermediary succession stage. Occurred a high percentage of zoochoric species (67%) that can indicate elevated activity of disperser fauna. The understory with high percentage of animal dispersed species and low number of pioneers also reinforce an intermediate stage, progressing to a more advanced stage in forest succession.
Brazilian Geographical Journal: Geosciences and Humanities research medium, 2012
The fragmentation and effects process make each forest fragment a single vegetation ... more The fragmentation and effects process make each forest
fragment a single vegetation community. Detailed analysiscomparingthestructureanddiversityofspecies that predominate in forest fragments allows greater reliability about the conservation. We compare two semideciduousforestsinTriânguloMineiroondiversity, density,basalarea,heightparameters,dispersiongroup,
successiongroupandsimilarityindices.Thevariationin fragmentsconservationwasobservedatspeciesdensity, when analyzed alone diversity, there is a difficulty in classification. Ipiaçu shows successional groups distribution like FEG, however, density in the groups, principally,pioneerspeciesgroupsissuperiorinIpiaçu.
Thisinformationfacilitatestheevaluatingprocessabout theforestenvironmentalconditionandoffersbestcredit inforestanalysis.
Interciencia (Caracas), 2011
The need to know more about diversity and species distribu-tion patterns of the cerrado biome has... more The need to know more about diversity and species distribu-tion patterns of the cerrado biome has increased, due to its ac-celerated destruction. Hence, a floristic and phytosociological
inventory was conducted in a cerrado (stricto sensu) area, lo-cated in the Parque Estadual da Serra de Caldas Novas, state
of Goiás, Brazil, comparing the quantitative and qualitative
results with those from other 15 areas. Fifty plots of 20×20m
(2ha) were established and all trees with CSH30 >15cm were
included in the study. A total of 70 species, 51 genera and 31 families were found at the site. Fabaceae was the richest fam-
ily (with 13 species), followed by Vochysiaceae (7). The high-
est importance values were for Tabebuia aurea Benth. & Hook,
Kielmeyera coriacea Mart. & Zucc and Qualea parviflora Mart.
The floristic comparative analysis showed that geographic dis-
tance was the most important parameter, followed by other en-
vironmental factors. The quantitative structural patterns reflect
variations in more reduced scale, probably under strong influ-
ence of environmental variations.
Edinburgh Journal of Botany, 2011
This study describes the structure of the arboreal plant community in a cerradao fragment located... more This study describes the structure of the arboreal plant community in a cerradao fragment located at the Serra de Caldas Novas State Park, Goia´ s, central Brazil. It also compares
the collected data with information from 10 other cerrada˜o sites on dystrophic and mesotrophic soils. All trees of 4.77 cm or more diameter at breast height, in twenty-five 20 m 3 20 m plots, were surveyed. Soil samples were analysed to determine the
availability of nutrients. The vegetation had a discontinuous canopy, with a high density of small and medium-sized trees, and the soil was classified as dystrophic according to nutrient availability. Under ordination using Detrended Correspondence Analysis, species characteristic of the study site, such as Sclerolobium paniculatum and Emmotum nitens, were positioned in the central portion, while cosmopolitan species formed distinct
groups, separated along the two axes. The community showed a low level of similarity in comparison to cerradoes reported in the literature in other parts of Brazil, having more than 50% similarity only with three geographically close sites.
Scientia Forestalis, 2011
The deciduous forests are among the most endangered forests in the tropics. The deciduous forests... more The deciduous forests are among the most endangered forests in the tropics. The deciduous forests under direct influence areas of large hydropower areas are subject to the environmental changes caused by the reservoir. This study investigates the effects of reservoir flooding on the population of plants with at least 1 meter above soil height of two typical species widely distributed in deciduous forests: M. urundeuva Allemão
and A. colubrina (Vell.) Brenan. Samples were collected from the population before and after the floods (2006 and 2009) for both species in two forests under the influence of the Amador Aguiar I Hydropower artificial reservoir. To evaluate the moisture content variation in the soil, samples were collected before and
after the floods (2005 and 2008). M. urundeuva had a high mortality, whereas A. colubrina shows more tolerance to the new conditions. The soil moisture presented an increase in amplitude of the mean variation
Bioscience Journal, 2011
A combinação de algumas características ecológicas das espécies para a formação dos c... more A combinação de algumas características ecológicas das espécies para a formação dos chamados grupos ecológicos tem ajudado a identificar alguns padrões para as diferentes formações vegetais. A partir da análise fitossociológica e da estrutura diamétrica das espécies arbóreas de um fragmento de floresta estacional semidecidual, este estudo pretendeu classificar as espécies em grupos ecológicos e aferir o estado de conservação deste remanescente. Foram amostrados todos os indivíduos arbóreos com CAP > 15 cm, presentes em 25 parcelas (20x20 m) e as espécies foram
classificadas por grupos sucessionais e síndrome de dispersão. Foram registrados 976 indivíduos distribuídos em 86 espécies,
pertencentes a 38 famílias. As espécies secundárias iniciais apresentaram maiores valores na riqueza de espécies, densidade
de indivíduos e valor de importância, seguido das espécies secundárias tardias e das pioneiras que tiveram pouca
representatividade. Em relação à síndrome de dispersão pôde-se observar composição de 60 espécies zoocóricas, 21
anemocóricas e cinco autocóricas. A análise da distribuição de diâmetros para os grupos sucessionais sugeriu bom
recrutamento para as secundárias iniciais e tardias e problemas na regeneração para o grupo das pioneiras. Estes resultados
quando comprados com outros estudos similares realizados nas FES da região permitiram inferir que a floresta estudada se
encontrou num estádio intermediário de desenvolvimento sucessional.
Caminhos de Geografia, 2011
The growing fragmentation of natural habitats intensifies the necessity to evaluate biological ... more The growing fragmentation of natural habitats intensifies
the necessity to evaluate biological diversity contained in plant remnants. From the survey of species composition and structure of the tree component in a remnant of semideciduous seasonal forest, this study aimed to classify the species in ecological groups that provide subsidies to gauge the level of conservation of this fragment. Were used 25 plots of 20 x 20 m totaling 1 ha, being included in the sample all living individuals with CAP ≥ 15 cm. The species were classified according to the successional group, dispersion syndrome and deciduousness. Were sampled 1063 individuals belonging to 88 species and 40 families. The value of diversity and equability (3.53 and 0.79, respectively) and the high basal area sampled (34.68 m2.ha-1) reflect the high species richness and indicate that the fragment, although small (22.3 ha), can be considered as an ecosystem conserved. The large number of species with zoochoric dispersion, which increase the availability of resources for the local fauna, and abundance of species early secondary and late secondary, as indicative of the maturity of the vegetation, underline the importance of conserving the
fragment, and reaffirm the potential of this remnant as an important habitat and natural corridor for species of the region.
Caminhos de Geografia, 2011
implications for biodiversity conservation of Cerrado) The deployment of conservation units re... more implications for biodiversity conservation of Cerrado) The deployment of conservation units represents a fundamental step for balancing the advancement of human activities on natural ecosystems. This study presents the environmental diagnosis (biotic environment) of a remnant natural in Monte Carmelo, Minas Gerais, with the goal of describing the physiognomies of the area, generating a cover and
catalogue the species of flora and fauna, to subsidize the creation and deployment of the Matinha’s Municipal Park. The survey of the flora was held following the Rapid
Ecological Assessment methodology (REA). The faunal surveys were based on three sampling methods: active search, visual search and interviews. Seven physiognomies
were mapped, revealing a mosaic of plant communities with distinct aspects. The mapping of physiognomies in the Park identified areas containing potential habitats for endangered species, or to serve as natural corridors. Were recorded 322 species of flora and fauna, some of them vulnerable to extinction. The creation of the Matinha’s Municipal Park represents a major advancement for the city of Monte Carmelo and the region. In addition to the great potential to balance the local biodiversity, this important remnant allows investment in environmental education, the promotion for eco-tourism
and other aspects of extreme importance to the economy and environmental causes of the municipality.
Hoehnea , 2010
The study aimed to characterize the tree community of a riparian forest, one of the remnants on t... more The study aimed to characterize the tree community of a riparian forest, one of the remnants on the Araguari River, at Uberlândia, Triângulo Mineiro, Minas Gerais State. The study was nvestigated by phytosociological survey of 110 plots of 10 m × 10 m (1,1 ha). All trees with CAP ≥ 15 cm were registered. There were sampled 1,393 trees distributed in 89 species and 36 families. Hirtella gracilipes (Hook.f.) Prance was the most abundant specie, with the highest frequency, density and VI. The Shannon index was H’ = 3,65 nats.ind-1. The analysis of the vertical structure indicated the occurrence of three strata in the riparian forest: the canopy, the understory and an intermediate stratum. The floristic comparisons indicated that the riparian forest of Araguari River is more similar to the Triângulo Mineiro forests and to gallery forests of the Central Brazil, than to riparian forests of south-southeastern of Minas Gerais and São Paulo.
Bioscience Journal, 2010
Foi realizado o levantamento fitossociológico de um fragmento de floresta estacional semidecidual... more Foi realizado o levantamento fitossociológico de um fragmento de floresta estacional semidecidual localizada na reserva legal da Fazenda Irara, Uberlândia -MG. O estudo analisou um hectare do fragmento utilizando 25 parcelas contíguas e sistemáticas de 20 x 20 m, onde todos os indivíduos vivos arbóreos com circunferência a altura do peito maior que 15 cm foram amostrados e identificados. As espécies foram classificadas quanto aos grupos sucessionais e síndromes de dispersão. Foram amostrados 945 indivíduos distribuídos em 73 espécies, 65 gêneros e 36 famílias. O valor de equabilidade e do índice de diversidade de Shannon foram 0,81 e 3,47, respectivamente. Neste fragmento 17% são espécies pioneiras, 49% secundárias iniciais e 34% secundárias tardias, demonstrando um estágio intermediário de sucessão. Ocorre alta porcentagem de espécies zoocóricas (77%), podendo indicar alta atividade da fauna dispersora.
Revista Árvore, 2010
It was studied seeds dispersal of five first trees of Platypodium elegans Vog. (Fabaceae), in are... more It was studied seeds dispersal of five first trees of Platypodium elegans Vog. (Fabaceae), in area of cerradão in the Estação Ecológica do Panga (EEP). The samplings had been made in 0,25 plots of m2, located in lines leaving of the base of the matrix in direction to the four points cardinals (north, south, east and west), marked to each meter. The fruits had been opened for analysis of the quality of the seeds. A total of 1.131 seeds was collected in the sampling area of the five arrays, of which 18,4% they were viable and 81,6% probably impracticable for germination. The dispersion of the seeds suffered influence
from the topography of the place of the matrices, of the physiological and genetic answers daily early-dispersion,
as well as of the possible favorable aiming of the wind. The joint action of these factors serves as relevant facilitators on the seed bank training as so as the probability of establishment of new individuals both in the studied area and also in adjacent vegetation.
Caminhos de Geografia, 2013
The woodland (Cerradão) is considered one of the most threatened ecosystems in the wo... more The woodland (Cerradão) is considered one of the most threatened ecosystems in the world, mainly by constantly advancing of agricultural and urbanization. This physiognomy shares species from the Cerrado sensu stricto and forest formations of the Cerrado biome (Brazilian savanna). This study evaluated the floristic composition and structure of arboreal vegetation, as well as the dispersal syndromes of species in a remnant of woodland, located in Uberlândia, MG. There were sampled 25 plots (20 x 20 m), totaling 1 ha. We sampled 1353 individuals, from 74 species and 35 families. The total basal
area was 13.63 m2.ha-1. Families and species most representatives are considered typical for this vegetation type. The main dispersion syndrome was zoochory, typical of
tropical forests, but the anemochory, very common in savannas, was also fairly representative. Our results showed the dichotomy of floristic diversity and functional traits of woodland, presenting both functional and floristic similarities with forest physiognomies as savanna physiognomies. This complexity increases its importance for the maintenance of biodiversity in the Cerrado and praises efforts to conserve them.
Revista de Biología Tropical, 2013
"Local changes caused by dams can have drastic consequences for ecosystems, not only because they... more "Local changes caused by dams can have drastic consequences for ecosystems, not only because they change the water regime but also the modification on lakeshore areas. Thus, this work aimed to determine the changes in soil moisture after damming, to understand the con-sequences of this modification on the arboreal community of dry forests, some of the most endangered systems on the planet. We studied these changes in soil moisture and the arboreal community in three dry forests in the Araguari River Basin, after two dams construction in 2005 and 2006, and the potential effects on these forests. For this, plots of 20m x10m were distributed close to the impoundment margin and perpendicular to the dam margin in two deciduous dry forests and one semi-deciduous dry forest located in Southeastern Brazil, totaling 3.6ha sampled. Besides, soil analysis were undertaken before and after impoundment at three different depths (0-10, 20-30 and 40-50cm). A tree (minimum DBH of 4.77cm) community inventory was made before (T0) and at two (T2) and four (T4) years after damming. Annual dynamic rates of all communities were calculated, and statistical tests were used to determine changes in soil moisture and tree communities. The analyses confirmed soil moisture increases in all forests, especially during the dry season and at sites closer to the reservoir; besides, an increase in basal area due to the fast growth of many trees was observed. The highest turnover occurred in the first two years after impoundment, mainly due to the higher tree mortality especially of those closer to the dam margin. All forests showed reductions in dynamic rates for subsequent years (T2-T4), indicating that these forests tended to stabilize after a strong initial impact. The modifications were more extensive in the deciduous forests, probably because the dry period resulted more rigorous in these forests when compared to semideciduous forest. The new shorelines created by damming increased soil moisture in the dry season, mak-ing plant growth easier. We concluded that several changes occurred in the T0-T2 period and at 0-30m to the impoundment, mainly for the deciduous forests, where this community turned into a “riparian-deciduous forest” with large basal area in these patches. However, unlike other transitory disturbances, damming is a permanent alteration and transforms the landscape to a different scenario, probably with major long-term consequences for
the environment."
Biotemas, 2013
This study was carried out in a semideciduous forest in Southeastern Brazil. Five ecological attr... more This study was carried out in a semideciduous forest in Southeastern Brazil. Five ecological attributes were used to define the functional groups: dominant stratum of the species, light demand of the plant, seed dispersal, likely pollinator, and deciduousness. The groups were formed through a species matrix and its attributes, and they were delimited according to the Jaccard similarity coefficient and a dendrogram generated by the group average (UPGMA). The analysis used was satisfactory, indicating the formation of four coherent groups with distinct functions both with regard to the community and the ecosystem. The results indicate a tree community in a late successional stage, with relations between flora and fauna species.
International Journal of Forestry Research, 2012
We examined floristic patterns of ten seasonal semideciduous forest sites in southeastern Brazil a... more We examined floristic patterns of ten seasonal semideciduous forest sites in southeastern Brazil and conducted a central sampling
of one hectare for each site, where we took samples and identified all individual living trees with DBH (diameter at breast
height, 1.30 m) ≥ 4.8 cm. Arboreal flora totaled 242 species, 163 genera, and 58 families. Fabaceae (38 species) and Myrtaceae
(20 species) were families with the largest number of species. Only Copaife ra lang s dor ffii and Hy me naea courbar il occurred at
all sites. Multivariate analysis (detrended correspondence analysis and cluster analysis) using two-way indicator species analysis
(TWINSPAN) indicated the formation of a group containing seven fragments in which Sipar una guiane nsis was the indicator
species. This analysis revealed that similarities between studied fragments were due mainly to the successional stage of the
community.
Brazilian Geographical Journal: Geosciences and Humanities research medium, 2012
Historical review of studies in seasonal semideciduous forests in Brazil: a perspective for... more Historical review of studies in seasonal semideciduous forests
in Brazil: a perspective for conservation - Biodiversity
conservation is one of the biggest challenges faced this
century, due to the high level of human disturbance in
natural ecosystems. The seasonal semideciduous forests
(SSF) have suffered the same degradation process as other
Brazilian ecosystems. Given this context, this study aimed to
review the literature regarding the classification,
characterization and distribution of SSF in Brazil, and to
present a historical review of previous studies. In the early
1980s and, for a period of 15 years, floristics and phytosociological studies dominated scientific research,
basically describing and comparing different forest remnants.
From mid-1990, new studies were developed using other
approaches. These studies not only initiated new lines of
research, but also gradually increased the emphasis on
floristic analysis, with the outcome of establishing new
hypotheses and more defined links of cause and effect
between the structural aspects of vegetation and
environmental factors, both functional and
phytogeographical.
Bioscience Journal, 2012
The present study aimed to determine the floristic, structural and ecological between ... more The present study aimed to determine the floristic, structural and ecological between physiognomies in a Cerrado emnant, Monte Carmelo, MG. From the phytossociological survey, we assessed the ecological patterns related to the species dispersion guilds and deciduousness. The floristic similarity between the physiognomies was parsed using quantitative and qualitative data (presence/absence) through the Jaccard similarity coefficient and Morisita-Horn indice. The urban remnant presented four vegetable physiognomies, classified in semideciduous seasonal forest, stricto sense cerrado, cerradão and gallery forest. We sampled 153 species, distributed in 49 families. The semideciduous forest covers the largest portion of the Park and has the greatest diversity of species. The gallery forest presented the less diversity, having as main representatives species adapted to conditions of hydromorphic soil. The predominance of zoochoric species in four physiognomies confirms the importance of biological agents on gene flow of these formations. The highest percentage of species anemochoric was found in the stricto sense cerrado and cerradão. The floristic similarity between the physiognomies present in urban remnant is low, demonstrating that small environmental variations reflect major floristic changes. Each physiognomies has its peculiarities, not only in relation to physical conditions, but also in relation to fundamental ecological processes, such as biological diversity and interaction with the fauna disperser, which may explain the great beta diversity found in the Cerrado biome.
Rodriguésia, 2012
Urban parks have a strategic importance fot the quality of life in urban centers, contributing to... more Urban parks have a strategic importance fot the quality of life in urban centers, contributing to significant environmental and social services. Knowledge of forest structure has helped to subsidize the maintenance of these parks. Based on the phytosociological analysis of tree species in a semideciduous forest fragment (120 ha), this study assessed the conservation status of this remnant. We sampled all trees with CBH >
15 cm, present in 25 permanent plots (20 × 20 m), and classified the species as to successional groups and dispersal syndromes. We recorded 798 individuals in 98 species belonging to 37 families. Early secondary species had the highest values of species richness , density and importance value, followed
by late secondary species with the highest dominance, and pioneer species with low representation. Regarding the dispersal syndrome, over 77% of the community is represented by species with zoochoric dispersal. These results increase the valuation of the “Parque da Matinha”, reaffirming the importance of this urban park for the conservation of native fauna and flora, and supporting the need for public policies of park use by visitors.
Biotemas, 2012
The goal of this work was to evaluate the biological diversity in an urban forest remnant to bett... more The goal of this work was to evaluate the biological diversity in an urban forest remnant to better understand
the structure of the community and ecological processes that are important for the conservation of these fragile
ecosystems. The study was carried out in a fragment of seasonal semideciduous forest, with a long history of human disturbance, which is located in an urban area of Uberlândia, Minas Gerais. Samples from 25 (20x20m)
plots were assessed, which included all individuals with a circumference at breast height (CBH) > 15cm. The
species were classified based on successional group and dispersal syndrome. A total of 958 trees, from 69 species
and 35 families, were recorded. The group of early secondary species presented higher values for all of the
phytosociological parameters, followed by the late secondary species. The results suggest that the fragment is in
an intermediate stage of successional development. Frequent and intense anthropogenic disturbance caused by the
periodic removal of litter and tree, shrub and herb seedlings, to maintain an area for recreation, is compromising
the regeneration of the species in this forest and thus hindering the slow process of regeneration of the remnant
towards more mature stages of succession.
Caminhos de Geografia, 2012
The phytosociological survey was realized in a semideciduous forest fragment located i... more The phytosociological survey was realized in a semideciduous forest fragment located in the legal reserve of São Pedro-Itaú Farm, Uberlândia - MG. This study analyzed one hectare of the fragment using 25 permanent plots of 20 x 20 m, where all the alive tree individuals with perimeter at breast height higher than 15 cm were included and identified. The species were classified as successional groups and dispersal syndromes. Were sampled 1144 individuals in 103 species and 41 families. The value of equability and Shannon’s diversity were 0.83 and 3.87, respectively. In this fragment 17% were pioneer species, 49% early secondary species and 34% late secondary species, demonstrating an intermediary succession stage. Occurred a high percentage of zoochoric species (67%) that can indicate elevated activity of disperser fauna. The understory with high percentage of animal dispersed species and low number of pioneers also reinforce an intermediate stage, progressing to a more advanced stage in forest succession.
Brazilian Geographical Journal: Geosciences and Humanities research medium, 2012
The fragmentation and effects process make each forest fragment a single vegetation ... more The fragmentation and effects process make each forest
fragment a single vegetation community. Detailed analysiscomparingthestructureanddiversityofspecies that predominate in forest fragments allows greater reliability about the conservation. We compare two semideciduousforestsinTriânguloMineiroondiversity, density,basalarea,heightparameters,dispersiongroup,
successiongroupandsimilarityindices.Thevariationin fragmentsconservationwasobservedatspeciesdensity, when analyzed alone diversity, there is a difficulty in classification. Ipiaçu shows successional groups distribution like FEG, however, density in the groups, principally,pioneerspeciesgroupsissuperiorinIpiaçu.
Thisinformationfacilitatestheevaluatingprocessabout theforestenvironmentalconditionandoffersbestcredit inforestanalysis.
Interciencia (Caracas), 2011
The need to know more about diversity and species distribu-tion patterns of the cerrado biome has... more The need to know more about diversity and species distribu-tion patterns of the cerrado biome has increased, due to its ac-celerated destruction. Hence, a floristic and phytosociological
inventory was conducted in a cerrado (stricto sensu) area, lo-cated in the Parque Estadual da Serra de Caldas Novas, state
of Goiás, Brazil, comparing the quantitative and qualitative
results with those from other 15 areas. Fifty plots of 20×20m
(2ha) were established and all trees with CSH30 >15cm were
included in the study. A total of 70 species, 51 genera and 31 families were found at the site. Fabaceae was the richest fam-
ily (with 13 species), followed by Vochysiaceae (7). The high-
est importance values were for Tabebuia aurea Benth. & Hook,
Kielmeyera coriacea Mart. & Zucc and Qualea parviflora Mart.
The floristic comparative analysis showed that geographic dis-
tance was the most important parameter, followed by other en-
vironmental factors. The quantitative structural patterns reflect
variations in more reduced scale, probably under strong influ-
ence of environmental variations.
Edinburgh Journal of Botany, 2011
This study describes the structure of the arboreal plant community in a cerradao fragment located... more This study describes the structure of the arboreal plant community in a cerradao fragment located at the Serra de Caldas Novas State Park, Goia´ s, central Brazil. It also compares
the collected data with information from 10 other cerrada˜o sites on dystrophic and mesotrophic soils. All trees of 4.77 cm or more diameter at breast height, in twenty-five 20 m 3 20 m plots, were surveyed. Soil samples were analysed to determine the
availability of nutrients. The vegetation had a discontinuous canopy, with a high density of small and medium-sized trees, and the soil was classified as dystrophic according to nutrient availability. Under ordination using Detrended Correspondence Analysis, species characteristic of the study site, such as Sclerolobium paniculatum and Emmotum nitens, were positioned in the central portion, while cosmopolitan species formed distinct
groups, separated along the two axes. The community showed a low level of similarity in comparison to cerradoes reported in the literature in other parts of Brazil, having more than 50% similarity only with three geographically close sites.
Scientia Forestalis, 2011
The deciduous forests are among the most endangered forests in the tropics. The deciduous forests... more The deciduous forests are among the most endangered forests in the tropics. The deciduous forests under direct influence areas of large hydropower areas are subject to the environmental changes caused by the reservoir. This study investigates the effects of reservoir flooding on the population of plants with at least 1 meter above soil height of two typical species widely distributed in deciduous forests: M. urundeuva Allemão
and A. colubrina (Vell.) Brenan. Samples were collected from the population before and after the floods (2006 and 2009) for both species in two forests under the influence of the Amador Aguiar I Hydropower artificial reservoir. To evaluate the moisture content variation in the soil, samples were collected before and
after the floods (2005 and 2008). M. urundeuva had a high mortality, whereas A. colubrina shows more tolerance to the new conditions. The soil moisture presented an increase in amplitude of the mean variation
Bioscience Journal, 2011
A combinação de algumas características ecológicas das espécies para a formação dos c... more A combinação de algumas características ecológicas das espécies para a formação dos chamados grupos ecológicos tem ajudado a identificar alguns padrões para as diferentes formações vegetais. A partir da análise fitossociológica e da estrutura diamétrica das espécies arbóreas de um fragmento de floresta estacional semidecidual, este estudo pretendeu classificar as espécies em grupos ecológicos e aferir o estado de conservação deste remanescente. Foram amostrados todos os indivíduos arbóreos com CAP > 15 cm, presentes em 25 parcelas (20x20 m) e as espécies foram
classificadas por grupos sucessionais e síndrome de dispersão. Foram registrados 976 indivíduos distribuídos em 86 espécies,
pertencentes a 38 famílias. As espécies secundárias iniciais apresentaram maiores valores na riqueza de espécies, densidade
de indivíduos e valor de importância, seguido das espécies secundárias tardias e das pioneiras que tiveram pouca
representatividade. Em relação à síndrome de dispersão pôde-se observar composição de 60 espécies zoocóricas, 21
anemocóricas e cinco autocóricas. A análise da distribuição de diâmetros para os grupos sucessionais sugeriu bom
recrutamento para as secundárias iniciais e tardias e problemas na regeneração para o grupo das pioneiras. Estes resultados
quando comprados com outros estudos similares realizados nas FES da região permitiram inferir que a floresta estudada se
encontrou num estádio intermediário de desenvolvimento sucessional.
Caminhos de Geografia, 2011
The growing fragmentation of natural habitats intensifies the necessity to evaluate biological ... more The growing fragmentation of natural habitats intensifies
the necessity to evaluate biological diversity contained in plant remnants. From the survey of species composition and structure of the tree component in a remnant of semideciduous seasonal forest, this study aimed to classify the species in ecological groups that provide subsidies to gauge the level of conservation of this fragment. Were used 25 plots of 20 x 20 m totaling 1 ha, being included in the sample all living individuals with CAP ≥ 15 cm. The species were classified according to the successional group, dispersion syndrome and deciduousness. Were sampled 1063 individuals belonging to 88 species and 40 families. The value of diversity and equability (3.53 and 0.79, respectively) and the high basal area sampled (34.68 m2.ha-1) reflect the high species richness and indicate that the fragment, although small (22.3 ha), can be considered as an ecosystem conserved. The large number of species with zoochoric dispersion, which increase the availability of resources for the local fauna, and abundance of species early secondary and late secondary, as indicative of the maturity of the vegetation, underline the importance of conserving the
fragment, and reaffirm the potential of this remnant as an important habitat and natural corridor for species of the region.
Caminhos de Geografia, 2011
implications for biodiversity conservation of Cerrado) The deployment of conservation units re... more implications for biodiversity conservation of Cerrado) The deployment of conservation units represents a fundamental step for balancing the advancement of human activities on natural ecosystems. This study presents the environmental diagnosis (biotic environment) of a remnant natural in Monte Carmelo, Minas Gerais, with the goal of describing the physiognomies of the area, generating a cover and
catalogue the species of flora and fauna, to subsidize the creation and deployment of the Matinha’s Municipal Park. The survey of the flora was held following the Rapid
Ecological Assessment methodology (REA). The faunal surveys were based on three sampling methods: active search, visual search and interviews. Seven physiognomies
were mapped, revealing a mosaic of plant communities with distinct aspects. The mapping of physiognomies in the Park identified areas containing potential habitats for endangered species, or to serve as natural corridors. Were recorded 322 species of flora and fauna, some of them vulnerable to extinction. The creation of the Matinha’s Municipal Park represents a major advancement for the city of Monte Carmelo and the region. In addition to the great potential to balance the local biodiversity, this important remnant allows investment in environmental education, the promotion for eco-tourism
and other aspects of extreme importance to the economy and environmental causes of the municipality.
Hoehnea , 2010
The study aimed to characterize the tree community of a riparian forest, one of the remnants on t... more The study aimed to characterize the tree community of a riparian forest, one of the remnants on the Araguari River, at Uberlândia, Triângulo Mineiro, Minas Gerais State. The study was nvestigated by phytosociological survey of 110 plots of 10 m × 10 m (1,1 ha). All trees with CAP ≥ 15 cm were registered. There were sampled 1,393 trees distributed in 89 species and 36 families. Hirtella gracilipes (Hook.f.) Prance was the most abundant specie, with the highest frequency, density and VI. The Shannon index was H’ = 3,65 nats.ind-1. The analysis of the vertical structure indicated the occurrence of three strata in the riparian forest: the canopy, the understory and an intermediate stratum. The floristic comparisons indicated that the riparian forest of Araguari River is more similar to the Triângulo Mineiro forests and to gallery forests of the Central Brazil, than to riparian forests of south-southeastern of Minas Gerais and São Paulo.
Bioscience Journal, 2010
Foi realizado o levantamento fitossociológico de um fragmento de floresta estacional semidecidual... more Foi realizado o levantamento fitossociológico de um fragmento de floresta estacional semidecidual localizada na reserva legal da Fazenda Irara, Uberlândia -MG. O estudo analisou um hectare do fragmento utilizando 25 parcelas contíguas e sistemáticas de 20 x 20 m, onde todos os indivíduos vivos arbóreos com circunferência a altura do peito maior que 15 cm foram amostrados e identificados. As espécies foram classificadas quanto aos grupos sucessionais e síndromes de dispersão. Foram amostrados 945 indivíduos distribuídos em 73 espécies, 65 gêneros e 36 famílias. O valor de equabilidade e do índice de diversidade de Shannon foram 0,81 e 3,47, respectivamente. Neste fragmento 17% são espécies pioneiras, 49% secundárias iniciais e 34% secundárias tardias, demonstrando um estágio intermediário de sucessão. Ocorre alta porcentagem de espécies zoocóricas (77%), podendo indicar alta atividade da fauna dispersora.
Revista Árvore, 2010
It was studied seeds dispersal of five first trees of Platypodium elegans Vog. (Fabaceae), in are... more It was studied seeds dispersal of five first trees of Platypodium elegans Vog. (Fabaceae), in area of cerradão in the Estação Ecológica do Panga (EEP). The samplings had been made in 0,25 plots of m2, located in lines leaving of the base of the matrix in direction to the four points cardinals (north, south, east and west), marked to each meter. The fruits had been opened for analysis of the quality of the seeds. A total of 1.131 seeds was collected in the sampling area of the five arrays, of which 18,4% they were viable and 81,6% probably impracticable for germination. The dispersion of the seeds suffered influence
from the topography of the place of the matrices, of the physiological and genetic answers daily early-dispersion,
as well as of the possible favorable aiming of the wind. The joint action of these factors serves as relevant facilitators on the seed bank training as so as the probability of establishment of new individuals both in the studied area and also in adjacent vegetation.