Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2015-12-07T22:42:59Z No. of bitstreams: 1 AlinaRochaPiresBarboza_DISSERT.pdf: 2471178 bytes, checksum: 8076374bc4ccf83252093950c45d18de (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2015-12-10T20:32:35Z (GMT) No. of bitstreams: 1 AlinaRochaPiresBarboza_DISSERT.pdf: 2471178 bytes, checksum: 8076374bc4ccf83252093950c45d18de (MD5) / Made available in DSpace on 2015-12-10T20:32:35Z (GMT). No. of bitstreams: 1 AlinaRochaPiresBarboza_DISSERT.pdf: 2471178 bytes, checksum: 8076374bc4ccf83252093950c45d18de (MD5) Previous issue date: 2014-04-30 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Ambientes recifais sofrem com os impactos do pisoteio humano, prejudicial ? estrutura da comunidade bent?nica. Esse trabalho objetivou 1) caracterizar a comunidade bent?nica no recife de Pirangi/RN, identificando padr?es de zona??o, e 2) avaliar o seu processo de estrutura??o sob diferentes graus de pisoteio. Foram coletados dados de abund?ncia dos organismos, porcentagem de cobertura do substrato e par?metros f?sico-qu?micos. Para responder ao primeiro objetivo, foram amostradas esta??es com diferentes tempos de exposi??o. Verificou-se a forma??o de duas zonas: uma abrangendo ?reas submersas e de menor tempo de exposi??o, de menor rugosidade e maior heterogeneidade na cobertura de substrato, relacionada a organismos como gastr?podes, caranguejos e ouri?o-do-mar; a segunda zona compreende ?reas de maior tempo de exposi??o, maior rugosidade e predom?nio de substrato rochoso, associada ? organismos como cracas, gastr?podes, bivalves e caranguejos. Conclui-se que o recife apresenta padr?o pr?prio de zona??o, influenciado tanto pelo tempo de emers?o quanto por caracter?sticas do substrato. Para o segundo objetivo deste trabalho, foram montados experimentos nas ?reas com diferentes intensidades de pisoteio, contendo os tratamentos: controle (isolado de pisoteio), isolado raspado, pisoteio e pisoteio raspado. Dados de abund?ncia, ?ndices de diversidade e cobertura viva foram comparados e os resultados mostraram que n?o houve diferen?a na estrutura da comunidade dos tratamentos raspados, por?m, a fauna raspada desses tratamentos apresentou uma abund?ncia de organismos menor na ?rea de pisoteio intermedi?rio. Entre os tratamentos n?o raspados, observou-se uma maior abund?ncia da fauna m?vel e riqueza da cobertura viva na ?rea de impacto elevado, enquanto a ?rea de pisoteio intermedi?rio apresentou uma maior porcentagem de cobertura viva. As ?reas controle iniciais e finais diferiram apenas quanto ? porcentagem de cobertura viva. As ?reas que foram raspadas e isoladas n?o diferiram do tratamento pisoteio ao t?rmino do experimento. Sugere-se que a atividade de pisoteio em Pirangi seja descentralizada. / Despite being areas of socioeconomic and ecological importance, the reef environments in northeastern Brazil have been suffering with cluttered tourism impacts, such as trampling, activity that leads to decrease in abundance of organisms, especially benthic, and loss of biodiversity. The objectives of this study were 1) to characterize the benthic community in the shallow sandstone reef of Pirangi/RN, identifying patterns of zonation, and 2) evaluate its process of structuring under different degrees of impact of trampling, providing information to the proper use of the area. Data on abundance of organisms, the percentage coverage of the substrate and physic-chemical parameters were collected. The formation of two zones on the reef was observed: one that considers submerged areas and ones with shorter time of exposure, lower roughness and higher heterogeneity in the coverage of the substrate, with a predominance of sand, foliose algae, rodolit, being related to organisms such as gastropods, crabs and sea-urchin; the second zone comprises areas with longer time of exposure, greater roughness and predominance of bedrock uncovered, being associated with organisms such as barnacles, gastropods, bivalves and crabs. It is concluded that the studied reef presents its own zonation pattern, influenced by both the time of immersion and the substrate characteristics, such as roughness and type of coverage. To answer the second objective of this study, four experimental blocks were mounted on each of the three areas of different intensities of trampling, containing the following treatments: control (isolated from trampling), shaved isolated, trampling and shaved trampling, with data collection by 11 months. The data in abundance, diversity indices and living coverage of the substrate were compared between areas and treatments. The results showed that at the trampling areas, at the end of the experiment, differences were observed between the intensities of the impact, where higher values of abundance and richness of mobile fauna and richness of live coverage (ANOVA, p <0.05) were found in the area of higher trampling intensity. For fauna withdrawal of trampled scraped treatments, it was observed in the area of greatest impact that the abundance of small benthic invertebrates is more than three times smaller than that at the area of intermediate trampling (ANOVA, p <0.05). Initial isolated areas and final ones differed only as to the percentage of live coverage, with an increase of 35% at the end of this experiment. As for the areas that were completely scraped and isolated at the end of the experiment was observed an increase in the percentage of live coverage of 11.11% compared to the initial amount in the area of intermediate impact and 37.5% in the area with greater impact, indicating recovery of the area. It is suggested that the current use of the reef of Pirangi be reviewed, with a decentralization of trampling, or a decrease in visits, so that it does not occur at high intensities

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2017-08-18T14:34:19Z No. of bitstreams: 1 2010 - Joana Farias dos Santos.pdf: 22299426 bytes, checksum: 81d0ca2bff111fd3e0327131ba752062 (MD5) / Made available in DSpace on 2017-08-18T14:34:19Z (GMT). No. of bitstreams: 1 2010 - Joana Farias dos Santos.pdf: 22299426 bytes, checksum: 81d0ca2bff111fd3e0327131ba752062 (MD5) Previous issue date: 2010-12-22 / Programa de Capacita??o da Universidade do Estado da Bahia, PAC - UNEB, Brasil. / Reclaimed areas constitute ecosystems where soil and part of subsoil were suppressed. They show minimal resilience levels and need antropogenic interference for rehabilitation in the regional context. In this study it was evaluated 5 reforestations with different species and functional properties (treatments) after a lapse of 13-years. In chapter 1 it was evaluated the development, horizontal structure and floristic composition of shrubby-arboreal stratum. In chapter 2 understory spontaneous regeneration and in chapter 3 similarity of floristic composition between rehabilitation and a spontaneous restored area (~ 40 years old) were determined. At reforestation sites with five different groups of species, floristic composition increased from 12 to 23 species, distributed on 12 families and 276 individuals, where Fabaceae was the major family. For spontaneous regeneration 3.554 individuals were surveyed (1.438 on winter and 2.116 at summer) and the most representative families were Asteraceae and Poaceae. At the restoration site, it was observed 967 individuals from spontaneous regeneration, and the most representative families were Asteraceae and Sapindaceae, showing that there is low similarity between rehabilitation and restoration environments. All treatments displayed advances in the environmental sustainability, but two combinations of species had different performances in the rehabilitation of the reclaimed areas. / ?reas de empr?stimo constituem ecossistemas onde o solo e partes do subsolo foram suprimidas. Elas apresentam n?veis m?nimos de resili?ncia, necessitando de interven??es antr?picas para sua reabilita??o ao contexto regional. Neste estudo se avaliaram 5 reflorestamentos com esp?cies e propriedades funcionais diferentes (tratamentos), seus desempenhos e sustentabilidade ambiental depois de transcorridos 13 anos. No Cap?tulo I foram avaliados o desenvolvimento, a estrutura horizontal e a composi??o flor?stica do estrato arb?reo-arbustivo. No Cap?tulo II, a regenera??o espont?nea nos sub-bosques e no Cap?tulo III, a similaridade entre composi??es flor?sticas de ?reas em reabilita??o e em restaura??o espont?nea, com aproximadamente 40 anos. Nos reflorestamentos com 5 diferentes conjuntos de esp?cies, a composi??o flor?stica aumentou de 12 para 23 esp?cies, distribu?das em 12 fam?lias e 276 indiv?duos, sendo a Fabaceae a principal fam?lia. Foram encontrados 3.554 indiv?duos regenerantes (1.438 no inverno e 2.116 no ver?o) e as fam?lias bot?nicas mais representativas foram Asteraceae e Poaceae. Na ?rea em restaura??o, foram observados 967 indiv?duos regenerantes e as fam?lias Asteraceae e Sapindaceae tiveram maior representa??o, evidenciando que h? pequena similaridade entre esp?cies de ambientes em reabilita??o e restaura??o. Todos os tratamentos demonstraram avan?os na sustentabilidade ambiental, por?m duas combina??es de esp?cies se diferenciaram no desempenho da reabilita??o de ?reas de empr?stimo.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2017-08-18T18:09:52Z No. of bitstreams: 1 2010 - Hiram Feij? Bay?o Junior.pdf: 2995539 bytes, checksum: c30780db47d43f18157697f751fc9127 (MD5) / Made available in DSpace on 2017-08-18T18:09:52Z (GMT). No. of bitstreams: 1 2010 - Hiram Feij? Bay?o Junior.pdf: 2995539 bytes, checksum: c30780db47d43f18157697f751fc9127 (MD5) Previous issue date: 2010-06-07 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior, CAPES, Brasil. / Disturbed Ecosystems present floristic composition changed, with a predominance of herbaceous vegetation, the soils are depleted, shallow, stony, with low infiltration and erosion presenting with different levels of Geodynamics. The individuals forest that colonized and settled in these environments, were considered rustic species. They were raised and their properties were evaluated in facilitating ecosystem evolved over 28 years, where the management was the restriction of pasture. The work was carried out in sections exposed to northern, local environmentally unfavorable of the watershed of Cacaria?s river, located in the Cacaria district, Pira? (S 22 ? 43'949''W and 43 ? 50'807''), located in the southern state of Rio de Janeiro. We found 14 rustic species in disturbed ecosystems, where only 4 survived to more advanced levels of the ecosystems (Tabernaemontana laeta, Sparattosperma leucanthum, Peltophorum dubium and Guarea guidonia), resulting in the same process of succession with 584 individuals and 43 species of 28 families in an area of 1.8 hectares, may constitute natural models of ecological restoration to be used in the Atlantic Forest. / Ecossistemas perturbados apresentam composi??o flor?stica alterada, com predom?nio de vegeta??o de porte herb?ceo, solos exauridos, rasos, pedregosos, com baixa infiltra??o e geodinamismos dos processos erosivos distintos. Os indiv?duos florestais que colonizam estes ambientes foram considerados esp?cies r?sticas. Eles foram levantados por censo em ?reas perturbadas e avaliadas os n?veis de coloniza??o espont?nea sob influencia das suas copas em ecossistema similar com 28 anos de restri??o ? pecu?ria. O estudo foi desenvolvido na vertente norte, local ambientalmente mais desfavor?vel por estar submetido a maiores perdas evapotranspirom?tricas da bacia hidrogr?fica do rio Cacaria, munic?pio de Pira? (S 22?43?949?? e W 43?50?807??), Rio de Janeiro. Foram encontrados 14 esp?cies r?sticas em ?reas perturbadas, onde apenas 4 subsistiram a n?veis mais evolu?dos do ecossistema (Tabernaemontana laeta, Sparattosperma leucanthum, Peltophorum dubium e Guarea guidonia), gerando sob as mesmas um processo de sucess?o com 584 indiv?duos e 43 esp?cies florestais, de 28 fam?lias em uma ?rea de 1,8 hectares. Estas informa??es podem ser essenciais ao desenvolvimento de modelos de restaura??o ecol?gica na Mata Atl?ntica.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-01-23T14:01:54Z No. of bitstreams: 5 20.pdf: 1561094 bytes, checksum: 910e8488121681244710dd4db32a5bd1 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-10T12:43:16Z (GMT) No. of bitstreams: 5 20.pdf: 1561094 bytes, checksum: 910e8488121681244710dd4db32a5bd1 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-10T12:43:16Z (GMT). No. of bitstreams: 5 20.pdf: 1561094 bytes, checksum: 910e8488121681244710dd4db32a5bd1 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2012 / Atividades antr?picas v?m de encontro com o paradoxo do desenvolvimento e da conserva??o. Assim a demanda por mat?ria-prima para sustentar os meios de produ??o, tem ?ntima rela??o com a explora??o dos recursos naturais, que realizada de modo inadequado e insustent?vel, gera a degrada??o do meio ambiente. Neste contexto, diante dos desafios que se apresentam para a sustentabilidade, alternativas estas, que tenham efic?cia no seu prop?sito (integra??o dos conhecimentos silviculturais e principios ecol?gicos) e retorno destas ?reas ?s condi??es pr?ximas das originais. O presente trabalho teve como objetivos estudar a din?mica da paisagem e da vegeta??o arbustivo-arb?reo em ?reas sob diferentes tipos de degradada??o em Diamantina, MG. As comunidades das ?reas degradadas pelo garimpo de diamante (ADGD) e ouro (ADGO), assim como, pelo processo de vo?orocamento (ADV) contou com 50 (10 x 10 m), 30 (10 x 10 m) e 36 (5 x 3m) parcelas respectivamente, que no primeiro invent?rio, foram amostrados todos os indiv?duos arb?reo-arbustivo vivos com DAS30 ? 3 cm. No segundo invent?rio, foram registrados os indiv?duos mortos, remensurados os sobreviventes e mensurados e identificados os indiv?duos recrutados. Foram calculadas as taxas de din?mica: mortalidade, recrutamento, ganho e perda em ?rea basal e numero de indiv?duos para cada ?rea. Os valores de H? obtidos para as ?reas foram comparados aos pares pelo teste de t de Hutcheson. Em cada parcela, foi coletada uma amostra composta do substrato superficial (0-20 cm), sendo analisados os par?metros qu?micos: pH em ?gua; teores de P, K+, Ca2+, Mg2+ e Al3+; complexo sortivo (acidez potencial (H +Al), satura??o por bases (V%), soma de bases (SB), CTC a pH 7 (T), CTC efetiva (t) e satura??o por alum?nio (m%)) e mat?ria org?nica (M.O); f?sicos: teores de areia, silte e argila, resist?ncia mec?nica ? penetra??o ao longo da camada de 0-30 cm, umidade, cobertura de rocha e cascalho exposto. As vari?veis ambientais foram comparadas pelo teste t para amostras independentes (P<0,05). Para analisar as correla??es entre os gradientes ambientais e vegetacionais foi empregada a An?lise de Correspond?ncia Can?nica (CCA). A ?rea estudada na din?mica da paisagem contou com 2.509,92 ha definidos entre os paralelos 7989545,95 e 7984296,35 sul e meridianos 646367,51 e 651117,89 oeste. O mapeamento e classifica??o da cobertura vegetal foi realizado por meio da interpreta??o visual de fotografias a?reas para os anos de 1950 e 2006. A quantifica??o estrutural da paisagem foi descrita por meio de ?ndices de composi??o e configura??o espacial resultantes do software Fragstats. No geral foram amostrados 1.152 indiv?duos, pertencentes a 16 fam?lias e 38 esp?cies, sendo, 153 indiv?duos, 5 fam?lias e 9 esp?cies pertencentes a ADGD; 921 indiv?duos, 16 fam?lias e 36 esp?cies pertencentes a ADGO e 78 indiv?duos, 9 fam?lias e 11 esp?cies pertencentes a ADV. A an?lise dos atributos f?sicos e qu?micos do substrato evidenciou alta limita??o ao desenvolvimento de plantas colonizadoras, apresentando como restri??es, substratos de textura arenosa com baixa fertilidade natural, acidez elevada al?m de classe de resist?ncia a penetra??o m?dia para as ?reas degradadas pelo garimpo de ouro e diamante. Verificou-se que houve rela??o entre os gradientes ambientais e a abund?ncia e composi??o flor?stica da vegeta??o colonizadora, ficando a maioria das esp?cies mais fortemente correlacionada com as vari?veis topogr?ficas (desn?vel), qu?micas (M.O e m) e f?sicas (umidade). Todos os indicadores estruturais analisados mostraram que as ?reas est?o em processo de constru??o inicial, por?m a ?rea degradada pelo garimpo de ouro encontra-se em est?gio sucessional mais avan?ado quando comparado com ?rea degradada pelo processo de vo?orocamento e a ?rea degradada pelo garimpo de diamante. Os mapas temporais de cobertura do solo evidenciam que a ?rea de estudo apresenta grande influ?ncia de atividades antr?picas. Contudo a quantidade de habitat natural na ?rea de estudo foi bem superior ao limiar de percola??o, passando de 99,26% (2491,59 ha) em 1950 para 89,62% (2249,35 ha) em 2006. Nesse contexto, ? poss?vel constatar que a paisagem se manteve estruturalmente conectada por meio de grandes fragmentos de vegeta??o nativa, proporcionando condi??es de sustentabilidade. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT Anthropogenic activities have been meeting with the paradox of development and conservation. Thus the demand for raw materials to sustain the means of production, is closely related to the exploitation of natural resources, which conducted improperly and unsustainable, causes the degradation of the environment. In this context, aa scientific community, facing the challenges that present themselves to a sustainability of the planet, has been conducting research aimed at generating alternatives for the recuperation of degraded areas; these alternatives, which are effective in their purpose (integration of knowledge silvicultural and ecological principles ) and return these areas to conditions similar to the originals. This study aimed to characterize physical and chemical substrate, to relate the abundance distribution of the colonizing species with environmental variables, to study the dynamics of the floristic composition of vegetation and analyze the dynamics of the landscape around the three areas under different types preterit of degradation, between the years 1950 and 2006, emphasizing the changes in landscape virtue to human activities in the State Park Biribiri (PEB) and surroundings, in Diamantina, MG. The communities of areas degraded by mining diamond (ADGD) and gold (ADGO), as well as the process of vo?orocamento (ADV) had 50 (10 x 10 m), 30 (10 x 10 m) and 36 (5 x 3m) plots respectively, in the first inventory sampled all shrub tree individuals with DAS30 ? 3 cm. In the second inventory, dead individuals were recorded, remeasured the survivors and measured and identified the recruited individuals. We calculated rates of mortality, recruitment, gain and loss in basal area and number of individuals for each area. Values ??H? obtained for areas were compared in pairs by t test Hutcheson. In each plot was collected a sample of the substrate surface (0-20 cm) were analyzed for chemical parameters: pH in water; levels of P, K+, Ca2+, Mg2+ and Al3+, exchangeable cations (potential acidity (H + Al ), base saturation (V%), sum of bases (SB), CTC at pH 7 (T), effective CTC (t), aluminum saturation (m%)) and organic matter (M.O); physical: contents of sand, silt and clay, penetration resistance along the 0-30 cm layer, moisture, coverage of rock and gravel exposed. Environmental variables were compared by t test for independent samples (P<0.05). To analyze the correlations between environmental gradients and vegetation was used Canonical Correspondence Analysis (CCA). The area studied in the dynamics of the landscape had 2,509.92 ha defined between the parallel and 7,989,545.95 7,984,296.35 646,367.51 meridian and south and west 651,117.89. The mapping and classification of vegetation cover was done by visual interpretation of aerial photographs for the years 1950 and 2006. Quantification structural landscape has been described by means of indexes of composition and spatial configuration resulting Fragstats software. Overall 1152 individuals were sampled, belonging to 16 families and 38 species, and, 153 individuals, families 5 and 9 species of ADGD, 921 individuals, 16 families and 36 species belonging to ADGO and 78 individuals, 9 families and 11 species belonging ADV. The analysis of physical and chemical properties of the substrate showed high limiting the development of colonizing plants, presenting as constraints, sandy substrates with low fertility, high acidity than class average penetration resistance for areas degraded by mining gold and diamond. There was a relationship between environmental gradients and floristic composition and abundance of colonizing vegetation, most species being more strongly correlated with the topographic variables (elevation), chemical (M.O and m) and physical (moisture). All structural indicators analyzed showed that the areas are in the process of initial construction, but the area degraded by mining gold is found in more advanced successional stage compared with the degraded area by process vo?orocamento and the area degraded by mining diamonds. Temporal maps of land cover indicate that this area of ??study has great influence anthropogenic activities. However the amount of natural habitat in the study area was well above the percolation threshold, from 99.26% (2491,59 ha) in 1950 to 89.62% (2249,35 ha) in 2006. In this context, it can be seen that the landscape remained structurally connected by means of large fragments of native vegetation, providing conditions for sustainability.

?rea de concentra??o: Recursos florestais. / Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2017-06-06T17:23:43Z No. of bitstreams: 2 alessandra_fonseca_louren?o.pdf: 879765 bytes, checksum: 7490aea1a6cc341415b4e1922959eca5 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2017-06-22T15:31:45Z (GMT) No. of bitstreams: 2 alessandra_fonseca_louren?o.pdf: 879765 bytes, checksum: 7490aea1a6cc341415b4e1922959eca5 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2017-06-22T15:31:45Z (GMT). No. of bitstreams: 2 alessandra_fonseca_louren?o.pdf: 879765 bytes, checksum: 7490aea1a6cc341415b4e1922959eca5 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2016 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Tendo em vista a import?ncia da utiliza??o de indicadores que reflitam o sucesso da restaura??o florestal em um ambiente anteriormente degradado, esse estudo avaliou a regenera??o natural de um ambiente restaurado por plantio direto de mudas com idade de seis anos, em compara??o a um ambiente de refer?ncia (mata conservada), ambos inseridos em Floresta Estacional Semidecidual, no Munic?pio de Dom Joaquim, MG. Os indiv?duos regenerantes com altura ? 0,5 m e di?metro ? altura do peito (DAP) menor ou igual a 5 cm foram amostrados em 38 parcelas de 25 m?, distribu?das em cada ambiente. Os par?metros relacionados ? composi??o de esp?cies (riqueza, diversidade e similaridade), ? estrutura (densidade e ?rea basal) e aos grupos ecol?gicos (s?ndrome de dispers?o e categoria sucessional) foram comparados entre os dois ambientes. O ?ndice de Jaccard mostrou alta similaridade entre os dois ambientes (SJ=54,7%), revelando a forte influ?ncia do ecossistema de refer?ncia como fonte de prop?gulos para o ambiente em restaura??o. N?o houve diferen?a significativa dos par?metros estruturais, do potencial de riqueza de esp?cies e do perfil de diversidade entre os ambientes. Entretanto, houve diferen?a entre os grupos ecol?gicos, nos quais o ambiente em restaura??o apresentou menor propor??o de indiv?duos na guilda n?o-pioneira e na guilda zooc?rica. Com o avan?o da sucess?o no ambiente em restaura??o, espera-se que as guildas se equiparem ?s do ambiente de mata. A inser??o do ambiente em restaura??o em matriz florestal conservada foi determinante para a recomposi??o dos par?metros que obtiveram valores similares aos do ambiente de refer?ncia. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016. / Due to the importance of using indicators that reflect the success of forest restoration in a previously degraded environment, this study evaluated the natural regeneration of an environment restored till the age of six years, which was previously degraded grasslands, compared to a reference environment (preserved forest), both located in semideciduous forest in Conceicao do Mato, municipality of MG. The regenerating individuals with height ? 0.5 m and diameter at breast height (DBH) less than or equal to 0.05 m were sampled in 38 plots of 25 m?, distributed in each environment. The parameters related to species composition (richness, diversity and similarity), structure (density and basal area) and environmental groups (dispersion syndrome and successional category) were compared between the two environments. The Jaccard index indicated high similarity between the two environments (SJ = 54.7%), showing the strong influence of the forest in environmental floristic composition restoration by the arrival of propagules. No significant differences of structural parameters, the potential of species richness and diversity profile among environments was identified. However, there was a difference between ecological groups, where the environment restoration showed lower proportion of individuals in non-pioneer guild and zoochorous guild. With the advancement of succession environmental restoration, it is expected that the guilds will equip the mata environment. Environmental integration in restoration forest matrix conserved was crucial to the recovery of the parameters obtained similar values to the reference environment.

Made available in DSpace on 2014-12-17T14:33:08Z (GMT). No. of bitstreams: 1 GustavoBCP_DISSERT.pdf: 12512381 bytes, checksum: bed71257fe14549fd72b88f9e977c446 (MD5) Previous issue date: 2013-02-08 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / Intera??es entre plantas s?o for?as ecol?gicas importantes na estrutura??o e composi??o de comunidades vegetais e podem servir como base te?rica para a restaura??o de ?reas degradadas. O presente estudo ? dividido em dois experimentos distintos. No primeiro, buscou-se entender: (i) se esp?cies pioneiras de ?reas degradadas da Caatinga facilitam a germina??o e o estabelecimento de esp?cies alvo para a restaura??o; (ii) se as intera??es entre plantas facilitadoras e facilitadas s?o esp?cie-espec?ficas e se a ontogenia das plantas facilitadas afeta a dire??o e a intensidade dessas intera??es. Em uma ?rea de Caatinga degradada no vale do S?o Francisco, Petrolina PE, vinte cinco sementes e quatro mudas de cinco esp?cies alvo foram alocadas em plots pareados, com 8 r?plicas cada, em baixo e fora da copa de tr?s esp?cies pioneiras. A riqueza e a abund?ncia de esp?cies lenhosas estabelecidas nos mesmos plots tamb?m foi amostrada. As esp?cies facilitadoras afetaram positivamente a diversidade e a composi??o de esp?cies da comunidade regenerante. Al?m disso, aumentaram a probabilidade de germina??o e estabelecimento das esp?cies alvo. Dependendo do est?gio ontogen?tico das esp?cies alvo as intera??es mudaram de esp?cie-espec?ficas para n?o espec?ficas. No segundo experimento, buscou-se entender como o tamanho da facilitadora e a varia??o na precipita??o influencia as intera??es de facilita??o. Em Macau-RN, 45 indiv?duos de M. tenuiflora, com um gradiente de tamanhos, foram selecionados em uma ?rea degradada. Um experimento fatorial em blocos foi implementado com 25 sementes de P. pyramidalis semeadas em plots pareados em todas as combina??es dos fatores ?gua e copa. M. tenuiflora e ?gua afetaram positivamente a germina??o, o estabelecimento e a sobreviv?ncia de P. Pyramidalis. A esp?cie facilitadora tamb?m afetou positivamente as condi??es microclim?ticas do solo e do ar. A intensidade da facilita??o dependeu da intera??o entre est?gio ontogen?tico, ?gua e tamanho da facilitadora

Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2017-06-09T18:42:59Z No. of bitstreams: 2 mayara_ribeiro_lage.pdf: 7630209 bytes, checksum: fb39ab87647bdca7bc30286669fad378 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2017-06-22T14:54:33Z (GMT) No. of bitstreams: 2 mayara_ribeiro_lage.pdf: 7630209 bytes, checksum: fb39ab87647bdca7bc30286669fad378 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2017-06-22T14:54:33Z (GMT). No. of bitstreams: 2 mayara_ribeiro_lage.pdf: 7630209 bytes, checksum: fb39ab87647bdca7bc30286669fad378 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2016 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Um trecho da BR- 367, que liga a cidade de Diamantina ao distrito de Guinda, em Minas Gerais, perpassa por ?reas de campo rupestre na Serra do Espinha?o Meridional e apresenta diversas ?reas de empr?stimo, constitu?das por jazidas de material granular consumidas em obra rodovi?ria da pr?pria via entre as d?cadas de 1960 e 1980. Atualmente tais ?reas ainda apresentam-se fortemente degradadas, caracterizando-se pela fraca cobertura vegetal, exposi??o do solo e inexist?ncia de um sistema de drenagem superficial eficiente. Neste contexto, surge a necessidade de alternativas que tenham efic?cia na integra??o dos conhecimentos silviculturais e princ?pios ecol?gicos visando o retorno destas ?reas ?s condi??es pr?ximas das originais. Este trabalho teve como objetivo entender a rela??o entre vari?veis ambientais e a estrutura horizontal e flor?stica das esp?cies colonizadoras destes ambientes degradados. Foram selecionadas quatro ?reas degradadas, analisadas por fotografias a?reas referentes aos anos de 1960 e 1979 nas quais foi poss?vel detectar das ?reas degradadas pontuais. Para o estudo do substrato estratificou-se as quatro ?reas selecionadas para a coleta de amostras deformadas e indeformadas de forma preferencial. Obteve-se as propor??es de areia, silte, argila, dados de resist?ncia ? penetra??o, densidade de part?culas e aparente, porosidade total, micro e macro porosidade. Para a an?lises qu?micas foram coletadas entre 5 subamostras de cada estrato com o intuito de se obter uma amostra composta do substrato superficial (0-20 cm), de forma a representar a heterogeneidade ambiental de cada ?rea. Foram analisados: pH em ?gua; teores de P, K+, Mg2+, Ca2+ e Al3+; complexo sortivo (acidez potencial (H+Al), satura??o e soma por bases (V% e SB), CTC (T), CTC efetiva (t) e satura??o por alum?nio (m%) e mat?ria org?nica (MO). Os dados obtidos foram aferidos e submetidos a an?lises estat?sticas. Realizou-se an?lise de componentes principais (PCA) pelo software PCORD vers?o 6, de modo a sintetizar as vari?veis de maior relev?ncia na correla??o das vari?veis analisadas. Para levantamento da comunidade vegetal foi empregado o m?todo da interse??o na linha no qual em cada ?rea foram alocadas doze linhas com 10,0 m de comprimento, distribu?das em zigzag, seguindo as coletas de solo, para correlacionar caracter?sticas do solo e vegeta??o. Cada linha foi subdividida em dez unidades amostrais (UA) cont?nuas, totalizando 470 UAs e anotado a ocorr?ncia de esp?cies de h?bito herb?ceo, arbustivo e arb?reo. Foram calculadoss par?metros fitossociol?gicos: frequ?ncia absoluta (FA), frequ?ncia relativa (FR), cobertura absoluta (CA), cobertura relativa (CR) e o valor de import?ncia (VI). Para comparar os diferentes setores das ?reas estudadas quanto ao perfil de estrat?gias ecol?gicas de esp?cies herb?ceas, estas foram classificadas em sistemas de guildas de acordo com as estrat?gias de regenera??o, estratifica??o e dispers?o. Nas quatro ?reas analisadas foram amostrados 1.517 indiv?duos, pertencentes a 22 fam?lias e 109 esp?cies. A an?lise dos atributos f?sicos e qu?micos do substrato evidenciou alta limita??o ao desenvolvimento de plantas colonizadoras, apresentando como restri??es a alta resist?ncia a penetra??o e substratos de textura arenosa com baixa fertilidade natural. Verificou-se que houve rela??o entre os gradientes ambientais e a abund?ncia e composi??o flor?stica da vegeta??o colonizadora, ficando a maioria das esp?cies mais fortemente correlacionada com as vari?veis MO, H+Al e V al?m de propor??o de Areia, PT, DMG e RP. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016. / A section of the BR-367, connecting the Diamantina town to the Guinda district, Minas Gerais, runs through areas of rupestrian field of Espinha?o Range and presents several loan areas, consisting of deposits of granular material consumed in road construction between the 1960?s and 1980?s, Currently, these areas are still heavily degraded, characterized by poor vegetation cover, soil exposure and the absence of an efficient surface drainage system. In this context, the need arises for alternatives that have effectiveness in the integration of silvicultural knowledge and ecological principles aiming the return of these areas to the conditions close to the originals. This work aimed to understand the relationship between environmental variables and the horizontal and floristic structure of the colonizing species of these degraded environments. Four degraded areas were selected, analyzed by aerial photographs referring to the years 1960 and 1979 in which it was possible to detect the degraded areas. For the study of the substrate, the four areas selected for the collection of deformed and undisturbed samples were stratified in a preferential way. The proportions of sand, silt, clay, penetration resistance data, particle and apparent density, total porosity, micro and macro porosity were obtained. For the chemical analyzes, 5 sub-samples of each stratum were collected with the aim of obtaining a composite sample of the surface substrate (0-20 cm), in order to represent the environmental heterogeneity of each area. The following parameters were analyzed: pH in water; Contents of P, K +, Mg2 +, Ca2 + and Al3 +; (S), saturation (V%), sum of bases (SB), CTC (T), effective CTC (t) and saturation by aluminum (m%) and organic matter. A PCA was performed by software PCORD version 6, in order to synthesize the variables of greater relevance in the correlation of the analyzed variables. Was used the method of the intersection in the line in which in each area were allocated twelve lines with 10.0 m in length, distributed in zigzag, following the soil collections, to correlate soil and vegetation characteristics. Each row was subdivided into ten continuous sample units (AU), totaling 470 POAs and the occurrence of species of herbaceous, shrub and arboreal habit. Phytosociological parameters were calculated: absolute frequency (AF), relative frequency (FR), absolute coverage (AC), relative coverage (CR), and importance value (VI). In order to compare the different sectors of the studied areas with respect to the profile of ecological strategies of herbaceous species, these were classified in guild systems according to the strategies of regeneration, stratification and dispersion. In the four areas analyzed, 1,517 individuals belonging to 22 families and 109 species were sampled. The analysis of the physical and chemical attributes of the substrate showed a high limitation to the development of colonizing plants, presenting as restrictions the high resistance to penetration and substrates of sandy texture with low natural fertility. It was verified that there was a relation between the environmental gradients and the abundance and floristic composition of the colonizing vegetation, being most of the species more strongly correlated with the variables MO, H+Al and V besides the proportion of Sand, PT, DMG and PR.

Na ficha catalogr?fica e resumos consta o t?tulo: "Vegeta??o colonizadora em uma vo?oroca no munic?pio de Gouveia, MG". / Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2018-03-28T19:48:31Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) sandra_titon_custodio.pdf: 2043403 bytes, checksum: 42f78410758b9e7d112c05a2080acb88 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-03-29T12:11:49Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) sandra_titon_custodio.pdf: 2043403 bytes, checksum: 42f78410758b9e7d112c05a2080acb88 (MD5) / Made available in DSpace on 2018-03-29T12:11:49Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) sandra_titon_custodio.pdf: 2043403 bytes, checksum: 42f78410758b9e7d112c05a2080acb88 (MD5) Previous issue date: 2017 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O objetivo do presente trabalho foi avaliar o comportamento das comunidades vegetais em ?reas degradadas por processos erosivos do tipo vo?oroca, a fim de auxiliar em programas de recupera??o em ?reas degradadas. O m?todo utilizado para a amostragem foi o da interse??o na linha. A ?rea de estudos foi dividida em tr?s setores, de acordo com o porte da vegeta??o e est?gios dos processos erosivos na parte interna da vo?oroca e os setores divididos em estratos: baixada, encosta oeste e encosta leste. Foram registradas 101 esp?cies, divididas em 74 g?neros e 27 fam?lias bot?nicas. As fam?lias Asteraceae e Melastomataceae e os g?neros Baccharis e Miconia foram os mais representativos e o grupo das Samambaias apresentou maiores ?ndices de Frequ?ncia, Cobertura e Valor de Import?ncia. A ?rea apresentou baixa similaridade flor?stica e alta diversidade de esp?cies. Foram registrados maiores porcentagens de esp?cies com s?ndrome de dispers?o zooc?rica, de h?bito arbustivo e forma de vida faner?fita. A an?lise da vegeta??o permite afimar que a ?rea encontra-se em est?gio de sucess?o secund?ria inicial. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2017. / The objective of the present work was to evaluate the behavior of the plant communities in areas degraded by erosive processes - gully type, in order to assist in recovery programs in degraded areas. The method used for sampling was that of the line-intercept. The study area was divided into three sectors, according to vegetation size and stages of the erosive processes in the inner part of the gully and the sectors divided into strata: lowland, west slope and east slope. There were 101 species, divided into 74 genera and 27 botanical families.The families Asteraceae and Melastomataceae and the genera Baccharis and Miconia were the most representative ones and the group of Ferns presented higher Frequency, Coverage and Significance Indices. The area presented low floristic similarity and high species diversity. Higher percentages of species with zoocoric dispersion syndrome, shrub habit and phanerophytic life form were recorded. The analysis of the vegetation allows to emphasize that the area is in the initial secondary succession stage.