scholarly journals NATURAL REGENERATION STRATUM AS AN INDICATOR OF RESTORATION IN AREA OF ENVIRONMENTAL COMPENSATION FOR MINING LIMESTONE, MUNICIPALITY OF BARROSO, MG, BRAZIL

2016 ◽  
Vol 40 (2) ◽  
pp. 189-196 ◽  
Author(s):  
Wanuza Helena Campos ◽  
Sebastião Venâncio Martins

ABSTRACT This study was conducted in a forest under restoration process, which belongs to the company Holcim Brasil S/A, in the municipality of Barroso, state of Minas Gerais (21º00'to 22º00'S and 43º00' to 44º00'W), where 40 plots (2 x 2 m) were set, spaced at 10 m, forming eight strata parallel to the watercourse present in the area. Floristic composition and natural regeneration stratum were characterized, and the formed strata allowed evaluating whether the riparian vegetation and watercourse influence on the local regeneration. It was found 162 individuals of 13 families, 18 genera and 22 species, and 10,125 individuals/ha were estimated. Successional classes from pioneer and early secondary and zoochory dispersion syndrome prevailed among species and individuals. The watercourse and riparian vegetation did not exercise significant influence (p> 0.05) on the number of species and regenerating individuals among the different strata of the forest. The diversity index of Shannon-Wiener (H') and equability of Pielou (J') were 2.691 and 0.870, respectively. The species Psidium guajava and Myrtaceae families presented the highest VI (value of importance). Natural regeneration analysis showed the low floristic diversity in the area, suggesting that corrective management actions should be adopted.

2015 ◽  
Vol 8 (Ed.esp.) ◽  
pp. 71 ◽  
Author(s):  
Letícia Mônica Garcia ◽  
Mariza Barion Romagnolo

O presente trabalho teve como objetivo conhecer a composição florística e estágio sucessional das espécies arbóreas que compõem as margens da mata ciliar do Ribeirão da Içara (23º09’51.74’’S e 51º39’21.60’’W), no município de Astorga, na região norte do Estado do Paraná. O clima da região é classificado como Cfa, e altitude média de 532 m. A área de estudo apresenta 0,5 ha, pertence ao domínio de Floresta Estacional Semidecidual, consiste em um trecho de mata ciliar formado por uma vegetação nativa com agrupamentos densos de árvores, cipós (trepadeiras), pouca vegetação rasteira e reflorestamento. A ocupação do solo do entorno é a pecuária e a produção de culturas de cana-de-açúcar e laranja. As coletas de material botânico foram realizadas através de expedições mensais com duração de três dias no período de dezembro de 2010 a março de 2011. Foram amostrados os indivíduos arbóreos em estágio reprodutivo, os quais foram incorporados ao acervo do HUEM. Algumas espécies foram coletadas apenas suas partes vegetativas. O material coletado foi identificado com auxílio de bibliografia específica e por comparação com o material do acervo do HUEM, seguindo o sistema APG III. As espécies foram classificadas quanto ao estágio sucessional através de consulta a bibliografias específicas e observações de campo, sendo que as exóticas e as indeterminadas não foram consideradas para esta análise. Foram registradas 84 espécies reunidas em 77 gêneros e 28 famílias, das quais seis foram identificadas apenas em nível de gênero, quatro ao nível de família e uma de família indeterminada. Fabaceae apresentou o maior número de espécies (23), seguida de Myrtaceae com seis, Malvaceae e Meliaceae com cinco, Anacardiaceae, Bignoniaceae, Euphorbiaceae e Sapindaceae com quatro, Rutaceae com três. Nestas famílias estão contidos 69,05% do número de espécies. O gênero com maior número de espécies foi o Machaerium (três). Quanto ao estágio sucessional, 35,93% das espécies pertencem à classe sucessional pioneira, 32,81% secundária inicial, 20,31% secundária tardia e 10,44% clímax. Este resultado, com predomínio de espécies pioneiras e secundárias, mostra que existe uma substituição gradual das espécies, o que possivelmente pode estar relacionado com a retirada de espécies de importância comercial. Flower Survey of Tree Species of Riparian Vegetation in Astorga, Brazil The floristic composition and successional stage of tree species in riparian vegetation of the Ribeirão da Içara (23º09’51.74’’S and 51º39’21.60’’W) in the municipality of Astorga in the northern region of the state of Paraná, Brazil, are analyzed. Climate is Cfa and average altitude is 532 m. The 0.5 ha area under analysis belongs to the Semideciduous Seasonal Forest and consists of a stretch of riparian vegetation formed by native vegetation with dense tree groups, creepers, ground vegetation and reforestation. Surrounding ground is occupied by livestock and the production of sugar cane and orange trees. Botanic material was collected by 3-day monthly expeditions between December 2010 and March 2011. Tree specimens in the reproduction stage were sampled and voucher specimens were incorporated to the collection of the State University of Maringá. Only the vegetal parts of some species were collected and the material was identified by specific bibliography and compared with specimens at the university, following the APG III system. Species were classified with regard to their successional stage by specific bibliography and field observations, although exotic and indeterminate plants were not taken into account in current analysis. Eighty-four species, with 77 genera and 28 families, were registered. Six were identified at genus level, four at family level and one family was undetermined. The Fabaceae had the highest number of species (23), followed by Myrtaceae (6), Malvaceae and Meliaceae (5), Anacardiaceae, Bignoniaceae, Euphorbiaceae and Sapindaceae (4), Rutaceae (3). Further, 69.05% of species belong to these families. Machaerium (3) was the genus with the highest number of species. With regard to the successional stage, 35.93% were species of the pioneer succession class; 32.81% initial secondary class; 20.31% late secondary class and 0.44% climax class. Results, featuring predominantly pioneer and secondary species, show a gradual replacement of species, perhaps related to the removal of commercially relevant species. KEYWORDS: Água do Içara Stream; Successional Stage; Native Vegetation.


2020 ◽  
pp. 33-40
Author(s):  
Patrícia Chaves de Oliveira ◽  
Beatriz Costa de Oliveira Queiroz de Souza ◽  
Elói Gasparin

Aims: Knowledge is currently low about composition, richness and abundance of native plant species from secondary forests in traditional communities in the Tapajós River Basin, Western Amazon. These forests are of great importance to indigenous populations being niches of resistance to the advances of monocultures. The objective of this work was to evaluate the floristic composition of a secondary forest with typical indigenous extractive interventions. Study Design: The secondary forest studied located in indigenous Village. This forest had 15 years of natural regeneration and was therefore an anthropized forest, where the indigenous people removed wood, fibers, oils and fruits, thus characterizing the agroextractivism on this environment and a very particular floristic composition always in evolution. Place and Duration of Study: The research was in Santarem city, Pará state, in Ipaupixuna Village (02°32´46” S, 54°20'15” W) between June 2019 to December 2019. Methodology: The research had a descriptive approach for floristic study, but in the same time had a quantitative point of view with the use of regression analysis. The parameters evaluated were: 1. Species abundance, 2. Floristic Richness; 3. Plant diversity measured by the Jentsch Mixing Coefficient; 4. Relations between Circumference & Height of trees. The size of the sampled area was 1 (one) hectare of secondary forest. Results: A high abundance was found for Tapirira guianensis Aubl followed by Buchenavia huberi Ducke and Bellucia grossularioides (L.) Triana. Fabaceae was the family of greatest quantitative expression in this 15-year-old secondary forest in indigenous landscapes followed by Arecaceae. Conclusion: The secondary forest studied of 15 years of natural regeneration and random anthropogenic interventions by agroextractivists activities of Munduruku Indigenous people showed medium floristic richness and low floristic diversity. Interventions to enrich this secondary forest with plant species with high economic potential can bring environmental and economic benefits to these indigenous people.


FLORESTA ◽  
2016 ◽  
Vol 46 (3) ◽  
pp. 343
Author(s):  
José Renan da Silva Guimarães ◽  
Marcelo De Jesus Veiga Carim ◽  
Luciedi De Cássia Leôncio Tostes ◽  
Salustiano Vilar da Costa Neto

The increasing importance of secondary forests all over the world alerts us to the urgent need to understand the biophysical and social underlying factors that affect its regeneration after the abandonment of agricultural practices and natural disturbances. In the state of Amapá, studies related to the structure of secondary forests are still scarce. Therefore, this article aims to characterize the floristic composition and structure in two stretches of secondary forest in the eastern Amazon, state of Amapá. For the floristic and phytosociological study of tree species, 10 plots of 10 x 100 m (1.0 ha) were established: five plots in the community of São Francisco do Iratapuru and five plots in the community of Santo Antônio waterfall, totaling half a hectare (0,5 ha) in each area. In all plots, subjects with diameter at breast height (DBH) ≥ 5 cm were considered. In total, 1,183 subjects were sampled in the two stretches of forest. In stretch 01, 565 subjects belonging to 74 species, 55 genera and 33 families were recorded. In stretch 02, 618 subjects belonging to 26 species, 23 genera and 15 families were recorded. The Shannon diversity index (H'), estimated for stretch 1, was 3.52; and for stretch 2 (2.23). The two studied stretches, despite being registered at the same age, showed significant difference in the species richness, which is the major factor for diversity differences, resulting in low similarity between the studied forests.


CERNE ◽  
2017 ◽  
Vol 23 (2) ◽  
pp. 275-282 ◽  
Author(s):  
Roselene Marostega Felker ◽  
Ana Paula Moreira Rovedder ◽  
Solon Jonas Longhi ◽  
Elias Frank Araujo ◽  
Maureen De Moraes Stefanello ◽  
...  

ABSTRACT Bamboo grove may cause changes in the structure and floristic composition of natural regeneration. This study evaluated the impact caused by Bambusa tuldoides Munro at natural regeneration, in riparian forest in Rio Grande do Sul, south of Brazil. Two areas were evaluated: riparian forest without bamboos (SB) as the reference area, and riparian forest dominated by Bambusa tuldoides (CB). In 2014, ten plots (10x10 m) were installed in each area. All individuals belonging to classes I (30≤ H <130 cm) and II (CBH≤5 cm) were measured and identified. Floristic composition, phytosociological indexes, Shannon diversity index, Margalef richness, Simpson dominance, Sorensen similarity, and cluster analysis by Twinspan were evaluated. Richness and absolute density decreased in CB compared to SB. The areas presented low floristic similarity, and high dominance of one or more species in both classes. Myrtaceae was the predominant botanic family in SB, especially Campomanesia xanthocarpa. In CB most species were secondary, as Myrsine umbellata, Cupania vernalis, and Ocotea puberula. Due to the large differences between SB and CB, the groups formed were restricted mostly to the species of each area. Species such as Myrsine umbellata (class I and II) and Strichnos brasiliensis (class II) appear as indicators and former of groups in CB. We concluded that high density of Bambusa tuldoides affect the richness and diversity of regeneration natural, changing the establishment and perpetuation of the species. Secondary species show greater potential for adaptation to these environments and can act as key species in management and recovery actions.


Nativa ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 109
Author(s):  
Leovandes Soares da Silva ◽  
Thais Ribeiro Costa ◽  
Arthur Duarte Vieira ◽  
Stênio Abdanur Porfírio Franco ◽  
Evandro Luiz Mendonça Machado

O objetivo desse estudo foi avaliar as mudanças na composição florística em um fragmento de Floresta Estacional Semidecidual. No primeiro inventário realizado em 2011 foram alocadas 25 parcelas de 10 ×40 m. Foram mensurados todos os indivíduos vivos com diâmetro a altura do peito ≥ 5cm. O segundo inventário foi realizado em 2015, utilizando-se os mesmos critérios do inventário anterior, assim, foram incorporados os novos indivíduos (recrutas) que atingiram o diâmetro mínimo de inclusão. O correram mudanças na composição florística, a mortalidade dos indivíduos foi superior ao recrutamento, houve perda de cinco espécies e incremento de duas espécies. O número de espécies e a densidade dos indivíduos variaram com o tempo. As espécies que desapareceram eram representadas por poucos indivíduos. A perda de espécies refletiu no índice de diversidade de Shannon (H’) e equabilidade de Pielou, (H’passou de 4,05 para 3,99 e equabilidade de Pielou J’ de 0,83 para 0,82), no primeiro e segundo inventário respectivamente, mesmo assim, os valores apontam para uma diversidade florística elevada. As mudanças na composição florística não foram significativas, a perda de espécies teve relação com as menos representativas em número de indivíduos, entre os inventários a floresta se manteve estável.Palavras-chave: mortalidade, recrutamento, sucessão ecológica. VARIATIONS IN THE FLORISTIC COMPOSITION IN SEASONAL SEMIDECIDAL FORESTS IN CURVELO-MG ABSTRACT: The objective of this study was to evaluate the changes in floristic composition in a fragment of Seasonal Semideciduous Forest. In the first inventory carried out in 2011, 25 plots of 10 × 40m were allocated. All living individuals with a breast height diameter ≥5 cmwere measured. The second inventory was carried out in 2015, using the same criteria of the previous inventory, thus, were incorporated the new individuals (recruits) that reached the minimum diameter of inclusion. The floristic composition changes, the mortality of the individuals was superior to the recruitment, there were loss of five species and increase of two species. The number of species and the density of individuals varied over time. The species that disappeared were represented by few individuals. The loss of species reflected in the diversity index of Shannon (H ') and Pielou equability, (H' went from 4.05 to 3.99 and Pielou J 'equability from 0.83 to 0.82), in the first and second inventory respectively, even so, the values point to a high floristic diversity. The changes in floristic composition were not significant, the loss of species was related to the less representative in number of individuals, among the inventories the forest remained stable.Keywords: mortality, recruitment, ecological succession.


FLORESTA ◽  
2019 ◽  
Vol 49 (4) ◽  
pp. 793
Author(s):  
Yasmim Andrade Ramos ◽  
Bruno Aurélio Campos Aguiar ◽  
Marcos Vinicius Cardoso Silva ◽  
Renata Elaine Siqueira Matos ◽  
Maria Cristina Bueno Coelho ◽  
...  

This study shows the phytosociology and floristics of a Dense Ombrophilous Forest fragment under forest management in Portel city, Pará State. Six conglomerates were sampled, divided into secondary and tertiary plots totaling 120 sample units of 0.4 hectares each, in which all trees with diameter at breast height (130 cm above ground; DBH) above 10 cm were measured. These individuals were botanically identified, and evenness and floristic similarity were calculated. There were 3,586 individuals distributed in 42 families, 121 genera, and 174 species. Families Fabaceae, Lecythidaceae, and Sapotaceae were the ones that obtained the highest IVI and the highest representativity of individuals. Species Eschweilera coriacea (DC.) S.A.Mori, Vouacapoua americana Aubl., and Tetragastris altissima (Aubl.) Swart were the ones with the highest IVI. Among the ten highest results, we highlight Syzygiopsis oppositifolia Ducke and Manilkara dardanoi Ducke, with great potential for timber production. The Shannon diversity index averaged 3.83 between the plots, and the Pielou evenness averaged 0.84, showing that the area presents high floristic diversity and great potential for forest management activities.


2019 ◽  
Vol 43 (4) ◽  
Author(s):  
Diego Balestrin ◽  
Sebastião Venâncio Martins ◽  
Wesley Fonseca ◽  
Luiz Henrique Elias Cosimo

ABSTRACT The objective of this study was to evaluate and correlate information about soil seed bank and canopy (%Canopy Openness and Leaf area index-LAI) in a mined area in restoration process through natural regeneration. The study area is located in Zona da Mata of Minas Gerais, which presents predominance of Semideciduous Seasonal Forest, and has an area of 0.5 ha in process of natural regeneration after six years of bauxite exploitation (without any intervention). Along the area, ten plots of 45x29cm were allocated and distributed in the best way to represent the whole area in restoration process. Seed bank diversity and canopy characteristics were evaluated in these plots, the last one using a NIKON D40X photographic camera, with fisheye lens of 8mm. As results, 8280 individuals (tree, shrub, herbs, and vines) were found, totaling 51 species and 24 botanical families. The Shannon diversity index (H’) was 2.770, and the equability (J) was 0.705, which demonstrate an average diversity in this area, with a density of 2114.94 germinated seeds m-2. Through the evaluation of the seed bank, the presence of exotic species (23.5%), the dominance of the pioneer species (68.6%), as well as high dispersal by wind (52.9%) were verified in the area. According to canopy characteristics, a significant variation between different points/regions within the study area was found, while patterns of existence of certain herbs as a function of canopy openness (lower vegetal cover/clearings) were also identified, as well as in response to spatial proximity between the allocated plots, confirming the high correlation between these two variables and their importance in the process of forest restoration.


2013 ◽  
Vol 19 (1) ◽  
pp. 77-82
Author(s):  
Marianna Warda ◽  
Ewa Stamirowska-Krzaczek ◽  
Mariusz Kulik

Abstract The paper presents floristic diversity of some plant communities in the Nadwieprzański Landscape Park (middle part of the Wieprz River valley). Phytosociological relevés were made in the years 2005-2007 with Braun-Blanquet method. Species richness was a base to calculate the Shannon-Wiener diversity index. The Wieprz River valley has the character of a floodplain. In its middle reaches, communities of the Molinio- Arrhenatheretea class accounted for nearly 75% of all plant communities in grasslands. Herbaceous communities were represented by associations from the Filipendulion alliance. The greatest diversity (H’ = 3.4) was characteristic for vegetation of the Valeriano-Filipenduletum association. It formed small patches in abandoned meadows. Small patches of plants from the Lythro-Filipenduletum ulmariae association, having a slightly smaller floristic diversity (H’ = 3.0) were found on abandoned meadows located in highly silted and poor organic soils. Characteristic species of herbaceous communities (Filipendula ulmaria, Valeriana officinalis and Lythrum salicaria) occurred also in the sward of abandoned thistle meadows. Typical thistle meadows (Cirsietum rivularis), with the predominance of Cirsium rivulare developed in land depressions, not far from the Wieprz River, in the vicinity of abandoned drainage ditches and along the edges of the valley. However, the total abandonment of these meadows leads to changes in floristic composition of the sward and to succession towards herbaceous communities.


2021 ◽  
Vol 25 (2) ◽  
pp. 172
Author(s):  
I Made Saka Wijaya ◽  
Luh Putu Eswaryanti Kusuma Yuni ◽  
Ida Ayu Eka Pertiwi Sari

Ayung river is the longest river in Bali. The middle part of the river is frequently utilized as rafting for tourism, such as in Bongkasa Pertiwi Village, Abiansemal District, Badung Regency – Bali. To preserve the river’s ecological function, the information of riparian vegetation as the dynamic component in river is highly required. This research aimed to study the structure of riparian vegetation in Bongkasa Pertiwi Village. The plot method was used and the study site was divided into three stations. Each station was composed by three replications with four plot variations: trees (20 x 20 m), poles (10 x 10 m), saplings (5 x 5), and herbs-shrubs (2 x 2 m). The data was analysed using vegetation analysis that completed with Importance Value (IV), Shannon-Wiener Diversity Index (H’), Index of Dominancy (C), and Index of Evenness (E). This study found that the structure of riparian vegetation in Bongkasa Pertiwi Village was in good condition which was indicated by the high abundance of local tree species. The floristic composition of riparian vegetation comprised by 18 species of trees, 18 species of poles, 21 species of saplings, and 29 species of herbs and shrubs. Cocos nucifera, Pterospermum javanicum, Bischofia javanica, Cananga odorata, Elaeocarpus serratus, Artocarpus heterophyllus, Coffea canephora, and Nephelium lappaceum were the species with the highest Importance Value (IV). The floor vegetation in form of herbs and shrubs was dominated by Sphaegneticola trilobata, Oplismenus burmanni, and Diplazium esculentum. Based on the Diversity Index (H’), Index of Dominancy (C), and Index of Evenness (E), diversity of riparian vegetation in Bongkasa Pertiwi Village was classified as medium category, without any dominated species, and the vegetation composition was equivalent.


2021 ◽  
Vol 16 (1) ◽  
pp. 167-183
Author(s):  
Manuela Gazzoni dos Passos ◽  
Geisa Percio do Prado ◽  
Claudia Fontana ◽  
Edilvane Ines Zonta ◽  
Edmilson Bianchini

The study of forest regeneration allows the diagnosis of conservation status of fragments and estimating population parameters that are essential for management projects. This study evaluated the structure, diversity and dynamics of the tree regenerating component of a remnant of mixed ombrophilous forest, aiming to support management actions for this forest type. The study was developed at the Parque Estadual das Araucárias (PEAR), located in the western region of the state of Santa Catarina, southern Brazil. A total of 100 plots of 25 m2 (0.25 ha) were allocated, all individuals with height ≥ 1.0 m and DBH &lt; 5 cm were sampled. Shannon’s diversity index (H’), Pielou’s equability index (J) and total natural regeneration rate (TNR) were estimated. We sampled 1,425 individuals from 99 species and 39 families, with an estimated total density of 5,700 individuals by hectare. The richest families were Fabaceae (13), Myrtaceae (10) and Lauraceae (7). The H’ was 3.76 and the J was 0.80. The TNR rate ranged from 0.05 to 8.12%, highlighting Trichilia elegans, with the highest rate and Araucaria angustifolia with low potential for natural regeneration. The analysis of the results indicated a high diversity in the regenerating component of the PEAR compared to other studies, probably because the area presents itself as a successional mosaic due to past disturbances.


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