Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-23T18:36:23Z No. of bitstreams: 2 luise_andrade_amaral.pdf: 1436467 bytes, checksum: 25e61f8ccb471b178196973f1abe067f (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-23T18:37:01Z (GMT) No. of bitstreams: 2 luise_andrade_amaral.pdf: 1436467 bytes, checksum: 25e61f8ccb471b178196973f1abe067f (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2014-12-23T18:37:21Z (GMT) No. of bitstreams: 2 luise_andrade_amaral.pdf: 1436467 bytes, checksum: 25e61f8ccb471b178196973f1abe067f (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Made available in DSpace on 2014-12-23T18:37:21Z (GMT). No. of bitstreams: 2 luise_andrade_amaral.pdf: 1436467 bytes, checksum: 25e61f8ccb471b178196973f1abe067f (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Previous issue date: 2013 / O objetivo deste trabalho foi avaliar dois tipos de topsoil, assim como maneiras de utiliza??o dos mesmos, ou como fonte de prop?gulos, nutrientes, microorganismos, mat?ria org?nica etc., na recupera??o de diferentes ?reas degradadas. Os experimentos foram desenvolvidos em ?reas pertencentes ? empresa de minera??o de ferro Anglo American, sediada no munic?pio de Concei??o do Mato Dentro, Minas Gerais, no entanto, como a empresa ainda est? em fase de instala??o, as ?reas cedidas n?o s?o degradadas pelo processo de extra??o do min?rio, sendo uma em pilha de est?ril e a outra em pastagem degradada. O trabalho foi organizado em cap?tulos, em que o primeiro apresenta uma revis?o bibliogr?fica sobre todos os temas envolvidos no estudo. O segundo cap?tulo apresenta a avalia??o da regenera??o natural e da cobertura do solo de uma pilha de est?ril no per?odo seco e chuvoso a partir da deposi??o a lan?o de topsoil proveniente de campo rupestre ferruginoso no munic?pio de Concei??o do Mato Dentro, Minas Gerais. E o terceiro cap?tulo apresenta abordagens para o uso de topsoil na recupera??o de uma pastagem degradada. Na ?rea do cap?tulo 2, foram instaladas, sistematicamente, 26 parcelas e uma parcela controle de 1 m?, foram caracterizados os atributos f?sicos e qu?micos dos substratos com e sem topsoil. Para identifica??o flor?stica, foram realizados dois invent?rios, um em julho de 2012 (in?cio da esta??o seca) e o outro em novembro de 2012 (in?cio da esta??o chuvosa). A cobertura do solo foi estimada, visualmente, por meio da porcentagem de cobertura viva, serrapilheira e solo exposto. Foram registrados 675 indiv?duos, sendo 201 contabilizados na primeira amostragem e 474 na segunda, totalizando 24 esp?cies identificadas pertencentes a 11 fam?lias e X indeterminadas. As fam?lias com maior n?mero de esp?cies foram: Asteraceae, com 26,92%, e Melastomataceae, com 15,38%. No entanto, as fam?lias que apresentaram maior o n?mero de indiv?duos foram Poaceae (33,33%) e Verbenaceae (28,85%) na esta??o seca e Poaceae (93,03%), Portulacaceae (68,16%) e Verbenaceae (35,82%) na esta??o chuvosa. Dentre os h?bitos encontrados, as herb?ceas se destacaram com 65,63% do total, seguidas pelas arbustivas 6,22%, subarbustivas 5,48% e arb?reas 1,18%. A cobertura viva aumentou 53%, a serrapilheira e o solo exposto diminu?ram 13 e 11%, respectivamente. J? no cap?tulo 3, foram estabelecidos 14 tratamentos com tr?s repeti??es implantados em 42 parcelas de 5 x 5 m numa ?rea, anteriormente, ocupada por pastagem. O experimento foi realizado em delineamento em blocos casualizados (DBC), em esquema fatorial (3 x 2 x 2) + 2. Os tratamentos foram compostos pela combina??o das origens do topsoil (est?gio inicial e est?gio m?dio), tr?s espessuras (10, 20 e 30 cm) e aus?ncia ou presen?a de sombrite de 70% com duas testemunhas adicionais (T1 e T2). Foi realizada a caracteriza??o f?sica, qu?mica e microbiol?gica do topsoil por meio de amostras coletadas na profundidade de 0-10 cm. Determinaram-se microorganismos por meio de an?lise de DNA, cobertura do solo e a flor?stica. Os resultados mostraram que o uso do topsoil melhorou, consideravelmente, a atividade microbiana atrav?s do carbono da biomassa e da amplifica??o de DNAs para grupos de bact?rias e fungos. A cobertura vegetal desenvolvida sobre os dois tipos de topsoil apresentou um total de 2929 indiv?duos de h?bitos herb?ceo, arbustivos e subarbustivos, identificadas 33 esp?cies em 11 fam?lias e uma morfoesp?cie. A fam?lia Asteraceae foi a que apresentou o maior n?mero de esp?cies (9), seguida de Fabaceae (6), Convolvulaceae e Malvaceae (4) e Solanaceae (3). J? o levantamento flor?stico do estrato arb?reo registrou 235 indiv?duos pertencentes a 21 esp?cies e 14 fam?lias e duas esp?cies sem identifica??o. A fam?lia com maior riqueza de esp?cies foi a Fabaceae (4), seguida da Rutaceae, Solanaceae, Myrtaceae e Asteraceae, no entanto, o maior n?mero de indiv?duos foi a Siparunaceae. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013. / ABSTRACT The aim of this study was to evaluate two types of topsoil, as well as ways to use them as a source of propagules, nutrients, microorganisms, organic matter etc., The recovery of degraded areas different. The experiments were conducted in areas belonging to the mining company Anglo American iron headquartered in the municipality of Concei??o do Mato Dentro, Minas Gerais, however, as the company is still in the installation phase, the assigned areas are not degraded by the process of extraction of ore, one in waste dump and the other in degraded pasture. The work was organized in chapters where the first presents a literature review on all subjects involved in the study. The second chapter presents the evaluation of natural regeneration and soil cover of a waste dump in the dry and wet deposition from the haul topsoil from ferruginous rocky fields in the municipality of Concei??o do Mato Dentro, Minas Gerais. The third chapter presents approaches to the use of topsoil in the recovery of a degraded pasture. In the area of Chapter 2 were systematically installed 26 plots and a control plot 1 square meter, we characterized the physical and chemical properties of the substrates with and without topsoil. For floristic identification were two surveys one in July 2012 (early dry season) and the other in November 2012 (rainy season). The ground cover was visually estimated by the percentage of live coverage, litter and exposed soil. We recorded 675 individuals being recorded in sample 201 and 474 in the second sample, a total of 24 identified species belonging to 11 families and a group of indeterminate. The families with the largest number of species were Asteraceae and Melastomataceae with 26.92% to 15.38%. However, households that had higher number of individuals were Poaceae (33.33%) and Verbenaceae (28.85%) in the dry season and Poaceae (93.03%), Portulaca (68.16%) and Verbenaceae ( 35.82%) in the rainy season. Among the habits found the herbaceous stood out with 65.63% of the total followed by shrub 6.22%, 5.48% and woody subshrubs 1.18%. The live coverage increased by 53%, the litter and exposed soil decreased by 13 and 11%, respectively. Already in chapter 3 were established 14 treatments with three replications implanted in 42 plots of 5 x 5 m in an area previously occupied by grasslands. The experiment was conducted in randomized block design (RBD), factorial (3x 2 x 2) + 2. The treatments consisted of combinations of sources of topsoil (early stage and middle stage), three thicknesses (10, 20 and 30 cm) and presence or absence of shading 70% with two additional witnesses (T1 and T2). We performed the physical, chemical and microbiological through the topsoil samples collected at a depth of 0-10 cm. Microorganisms was determined through DNA analysis, ground cover, and flora The results showed that the use of topsoil considerably improved microbial activity through carbon and biomass DNA amplification for groups of bacteria and fungi. The vegetation developed on the two types of topsoil had a total of 2929 individuals habits herbaceous, shrubby and subarbustivos, 33 species in 11 families and one morphospecies. The family Asteraceae was the one with the highest number of species (9), followed by Fabaceae (6), Convolvulaceae and Malvaceae (4) and Solanaceae (3). Already a floristic inventory of the tree stratum recorded 235 individuals belonging to 21 species and 14 families and two unidentified species. The family with the highest species richness was the Fabaceae (4), followed by Rutaceae, Solanaceae, Myrtaceae and Asteraceae, however, the largest number of individuals was Siparunaceae.

?rea de concentra??o: Conserva??o e restaura??o de ecossistemas. / Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2016-12-16T16:56:37Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) marco_aurelio_cardoso_murta.pdf: 1577952 bytes, checksum: bba2d96d1b722132b4b3335ae8d2a59e (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2016-12-19T16:49:12Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) marco_aurelio_cardoso_murta.pdf: 1577952 bytes, checksum: bba2d96d1b722132b4b3335ae8d2a59e (MD5) / Made available in DSpace on 2016-12-19T16:49:12Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) marco_aurelio_cardoso_murta.pdf: 1577952 bytes, checksum: bba2d96d1b722132b4b3335ae8d2a59e (MD5) Previous issue date: 2016 / Companhia Energ?tica de Minas Gerais (CEMIG) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A Mata Atl?ntica ? considerada um dos biomas mais importantes do mundo, um hotspot para conserva??o, sendo as a??es antr?picas as principais fontes de dist?rbios que alteram este ambiente. A regenera??o natural ? um processo muito importante que atua diretamente sobre a recupera??o e fun??es do ecossistema. Este estudo teve como objetivo descrever e comparar a composi??o flor?stica-estrutural da regenera??o natural em uma Floresta Estacional Semidecidual localizada na RPPN Fazenda Fartura em Capelinha-MG. Para tal, foram amostrados um trecho no interior do fragmento (INT) e dois trechos de bordas, sendo uma em contato com pastagem (BP) e outra com cafeicultura (BC). Para analisar a diversidade alfa (?) foi utilizado o ?ndice de Shannon (H?) e equabilidade de Pielou (J?) e beta (?) pela similaridade flor?stica entre os trechos foi averiguada por meio de diagramas de Venn e dos ?ndices de Jaccard e Czekanowski. Foi elaborada uma curva esp?cie-?rea para estimar a dimens?o da riqueza flor?stica de cada trecho e calculados seus estimadores ?jackknife?. Para verificar poss?veis prefer?ncias das esp?cies ao longo dos trechos foi realizada uma An?lise de Esp?cies Indicadoras (ISA). Para analisar a estrutura da vegeta??o foram calculados os par?metros fitossociol?gicos cl?ssicos, al?m das distribui??es de di?metro e altura. As vari?veis estruturais foram comparadas por meio do teste de Kruskal-Wallis e a posteriori um teste de Dunn. Na amostragem total foram registrados 1.561 indiv?duos (230 no INT, 588 na BP e 743 na BC), identificados em 42 fam?lias bot?nicas, 87 g?neros e 162 esp?cies (78 no INT, 87 na BP e 89 na BC). As fam?lias com maior riqueza foram Myrtaceae, Fabaceae, Lauraceae, Rubiaceae, Melastomataceae e Annonaceae. Os resultados demonstraram que os trechos tem alt?ssima diversidade, muito acima do padr?o normalmente encontrado na literatura, com uma baixa similaridade flor?stica. De maneira geral, a estrutura da vegeta??o foi caracterizada por um maior n?mero de indiv?duos finos e pequenos. Os trechos apresentam ambientes distintos, cada um com diferentes hist?ricos de uso, variabilidade ambiental e tipos de dist?rbios, estes fatores possivelmente, foram os principais condicionantes que influenciaram os padr?es flor?sticos-estruturais da regenera??o natural na comunidade amostrada. As informa??es deste estudo evidenciaram a grande import?ncia da RPPN Fazenda Fartura para a conserva??o da Mata Atl?ntica, assim como, da necessidade de que mais estudos sejam realizados em escala espa?o-temporal. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016. / The Atlantic Forest is considered one of the most important biomes of the world, a hotspot for conservation, and human actions are the main sources of disturbances that change this environment. Natural regeneration is a very important process that acts directly on the recovery and ecosystem functions. This study aimed to describe and compare the floristic-structural composition of natural regeneration in a Semideciduous Forest located in the RPPN Fazenda Fartura in Capelinha-MG. For this, we sampled a stretch inside the fragment (INT) and two sections of edges, one in contact with pasture (BP) and the other with coffee (BC). To analyze the diversity alpha (?), we used Shannon Index (H') and evenness of Pielou (J') and beta (?) through floristic similarity between sections was determined through Venn diagrams and indices of Jaccard and Czekanowski. We developed the species-area curve to estimate the size of the floristic richness of each sections and its estimators calculated ?jackknife?. To check for possible preferences of the species along the sections we performed Indicator Species Analysis (ISA). To analyze the structure of the vegetation, we calculated the classical phytosociological parameters, besides diameter and height distribution. We compared the structural variables through Kruskal-Wallis test and retrospectively a Dunn test. In the total sampling, we registered 1,561 individuals (230 in INT, 588 in BP and 743 in BC), identified in 42 botanical families, 87 genera and 162 species (78 in INT, 87 in BP and 89 in BC). Families with greater richness were Myrtaceae, Fabaceae, Lauraceae, Rubiaceae, Melastomataceae and Annonaceae. The results showed that the sections have high diversity, well above the standard normally found in the literature, with a low floristic similarity. In general, the vegetation structure was characterized by a higher number of thin and small individuals. The sections have different environments, each with different historical use, environmental variability and types of disturbances, these factors possibly were the main constraints that influenced the floristic-structural patterns of natural regeneration in the sampled community. The information from this study showed the importance of RPPN Fazenda Fartura for the conservation of the Atlantic Forest, as well as the need for more studies to be performed in a spatiotemporal scale.

Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2018-02-07T16:42:52Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) xavier_dominique_marie_chauvet.pdf: 1433827 bytes, checksum: eb44d24d014598697e5f03f8775bdf4b (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-03-09T19:29:57Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) xavier_dominique_marie_chauvet.pdf: 1433827 bytes, checksum: eb44d24d014598697e5f03f8775bdf4b (MD5) / Made available in DSpace on 2018-03-09T19:29:57Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) xavier_dominique_marie_chauvet.pdf: 1433827 bytes, checksum: eb44d24d014598697e5f03f8775bdf4b (MD5) Previous issue date: 2017 / Estimativas indicam que 33% das terras agr?colas no mundo se encontram em algum est?gio de degrada??o, afetando principalmente a qualidade dos solos, a biodiversidade e a disponibilidade de ?gua. O Brasil concentra 140 milh?es de hectares de ?reas degradadas, dos quais 30 milh?es s?o pastagens com baix?ssima produtividade de alimento para os animais. A degrada??o do solo e dos ecossistemas nativos, bem como a dispers?o de esp?cies ex?ticas s?o as maiores e mais amplas amea?as ? biodiversidade. Em grande parte do pa?s o propriet?rio de um im?vel rural tem a obriga??o de registrar 20% da sua superf?cie como ?rea de Reserva Legal. Apesar da obrigatoriedade, em muitas propriedades ainda se verifica a sua inexist?ncia. Dentro do contexto da necessidade de implementa??o de Reserva Legal e da indisponibilidade de ?reas preservadas com vegeta??o nativa foi realizado um experimento em uma ?rea de pastagem degradada na qual se comparou o plantio isolado da aroeira do sert?o (Myracrodruon urundeuva Allem?o) com dois arranjos de sistema agroflorestal onde al?m da aroeira utilizaram-se como culturas anuais ou semi-perenes o feij?o guandu (Cajanus cajan (L) Hunth) e a mandioca (Manihot esculenta Crantz). O experimento foi implantado em ?rea de dom?nio do Bioma Cerrado. O delineamento estat?stico obedeceu ao modelo ?tipo leque? proposto por Nelder, (1962), onde analisou-se tr?s arranjos de plantio (aroeira a pleno sol, aroeira + feij?o guandu e aroeira + feij?o guandu + mandioca) em dez espa?amentos (555 a 3333 plantas de aroeira ha-1) completando 30 tratamentos. Ap?s 26 meses de implanta??o do experimento a sobreviv?ncia da aroeira foi de 100%, o crescimento da aroeira em altura, di?metro e cobertura de copa n?o foi influenciado pelos tratamentos e demostrou o car?ter calc?fila da esp?cie. A regenera??o arb?rea-arbustiva n?o foi favorecida pelo arranjo que continha aroeira, feij?o guandu e mandioca. A grande maioria da regenera??o arb?rea-arbustiva foi originada de brota??es de ra?zes pr?-existentes ? implanta??o do experimento. A regenera??o herb?cea foi influenciada pelo tipo de arranjo. O arranjo da aroeira a pleno sol permitiu a invas?o de Urochloa decumbens. O arranjo da aroeira, do feij?o guandu e da mandioca permitiu um excelente controle de herb?ceas invasoras, por?m limitou nesta fase inicial o desenvolvimento da regenera??o arbustiva-arb?rea. O arranjo com aroeira e feij?o guandu controlou a invas?o de Urochloa decumbens. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2017. / Estimates indicate that 33% of the world's agricultural land is in some stage of degradation, mainly affecting soil quality, biodiversity, and water availability. Brazil concentrates 140 million hectares of degraded areas, of which 30 million hectares are pastures with very low feed productivity. Degradation of native soil and ecosystems, and the dispersal of alien species are major and broader threats to biodiversity. The owner of a rural property has the obligation to register 20% of the area as a Legal Reserve area. Despite this obligation, in many ownerships the Legal reserve is non still existing. Within the context of the demand to recover degraded agricultural areas for the final implementation of Legal Reserve was carried out an experiment in an area of degraded pasture, in which an agroforestry system was compared with the isolated planting of an arboreal species. The arboreal species was Myracrodruon urundeuva Allem?o and the annual or semi-perennial crops were Cassava (Manihot esculenta Crantz) and Pigeon pea (Cajanus cajan (L) Hunth). The experiment was inserted in a typical Cerrado phytophysiognomy. The statistical design was based on Nelder's model (1962), where 3 plant arrangements (Aroeira, Aroeira + Pigeon pea and Aroeira + Pigeon pea + Cassava) were analyzed in 10 spacings (555 to 3333 Plants of aroeira.ha-1) completing 30 treatments. After 26 months of implantation, the survival rate of aroeira was 100%, the growth of the aroeira in height, diameter and crown cover was not influenced by treatments and expressed the calcific character of the species. The arboreal-shrub regeneration was not favored by the arrangement that contained Aroeira, Pigeon pea and Cassava. A great majority of the tree-shrub regeneration originated from rootstocks pre-existing to the implantation of the experiment. Herbaceous regeneration was influenced by the type of arrangement. The arrangement of the aroeira in full sun allowed the invasion of Urochloa decumbens. The arrangement of aroeira, pigeon pea and cassava allowed an excellent control of invasive herbaceous plants, but limited at this initial phase the development of tree-shrub regeneration. The arrangement with Aroeira and pigeon pea controlled an invasion of Urochloa decumbens.

Submitted by Verena Bastos (verena@uefs.br) on 2015-09-16T22:20:18Z No. of bitstreams: 1 Disserta??o finalpdf.pdf: 1860889 bytes, checksum: ee87b81fe0a21430df0bad836a2fe39f (MD5) / Made available in DSpace on 2015-09-16T22:20:18Z (GMT). No. of bitstreams: 1 Disserta??o finalpdf.pdf: 1860889 bytes, checksum: ee87b81fe0a21430df0bad836a2fe39f (MD5) Previous issue date: 2013-03-27 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The present work examined the floristic compositions and structures, and the similarities between seven areas degraded by mechanized diamond mining along the S?o Jos? River Valley (12o34? to 12?36? S - 41o22? to 41?35? W), in the municipality of Len??is, Bahia State, Brazil, after 23 years of abandonment and natural regeneration and compared them to an area of intact gallery forest along the same river. The collections were made between the months of April and December/2011 along 1 x 100 m transects established in each of the seven areas, applying the point method. A previously compiled species list was used to compare the seven recovering areas with an intact riverine forest site. A total of 62 species were encountered, distributed among 53 genera and 26 families. The families demonstrating the greatest species richness were Leguminosae (16), Poaceae (11), Cyperaceae (7), Melastomataceae (6), Malvaceae (4), and Lycopodiaceae (2). The sum of the richnesses of these families represented fully 74% of the total number of species recorded in the present study. In terms of the plant habits, 11 species (15%) were arboreal, 17 (26%) shrubs, 28 (42%) herbaceous, 07(11%) sub-shrubs, and 04 (6%) vines. The species demonstrating the greatest Relative Vigor and Cover were Sebastiania corniculata, Aristida setifolia, and Homolepis aturensis. The slow natural regeneration of these areas was apparently due to the modification of the soil structure by the mechanized mining, as judged by the greater similarity (although low) between the areas regenerating for the longest periods and the intact gallery forest site along the same river as performing solo one little more structured.c / Este trabalho verificou a composi??o flor?stica, estrutura e similaridade entre sete ?reas degradadas pelo garimpo de diamantes no vale do rio S?o Jos? (12o34? e 12?36? S - 41o22? e 41?35? W), munic?pio de Len??is, Bahia, ap?s decorridos 13 anos de registros sobre a regenera??o natural, e comparou com a floresta ciliar do mesmo rio. As coletas foram realizadas entre abril a dezembro de 2011 ao longo de um transecto de 1m x 100m em cada uma das ?reas onde foi aplicado o m?todo de pontos em cada uma das ?reas. Para comparar com o remanescente florestal do entorno, foi usada a lista de esp?cies da floresta ciliar elaborada previamente. Foram amostradas 62 esp?cies distribu?das em 53 g?neros e 26 fam?lias. As fam?lias com maior riqueza de esp?cies s?o Leguminosae (16), Poaceae (11), Cyperaceae (7), Melastomataceae (6), Malvaceae (4), Lycopodiaceae (2). O somat?rio da riqueza destas fam?lias representa 74% do total das esp?cies levantadas neste estudo. Em termos de h?bito foram encontradas 11 (15%) esp?cies arb?reas, 17 (26%) esp?cies arbustivas, 28 (42%) herb?ceas, 07(11%) subarbustivas e 04 (6%) trepadeiras. As esp?cies que mais se destacaram por Vigor Relativo e Cobertura foram Sebastiania corniculata, Aristida setifolia e Homolepis aturensis. A lenta regenera??o natural das ?reas se deve ?s m?s condi??o do solo que apresenta-se modificado pelas a??es do garimpo, tendo sido evidenciada uma maior similaridade, embora baixa, entre as ?reas de maior tempo de abandono que apresentam solo um pouca mais estruturado e o remanescente florestal ciliar do rio S?o Jos?.

Folha de aprova??o ausente no trabalho. / Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2016-12-15T16:26:43Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) danilo_cesar_de_abreu_costa.pdf: 2169605 bytes, checksum: 5ec8ad603683a6fdfbcbbb5e0eb92f2a (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2016-12-19T13:54:21Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) danilo_cesar_de_abreu_costa.pdf: 2169605 bytes, checksum: 5ec8ad603683a6fdfbcbbb5e0eb92f2a (MD5) / Made available in DSpace on 2016-12-19T13:54:21Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) danilo_cesar_de_abreu_costa.pdf: 2169605 bytes, checksum: 5ec8ad603683a6fdfbcbbb5e0eb92f2a (MD5) Previous issue date: 2016 / Companhia Energ?tica de Minas Gerais (Cemig) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A Reserva Particular do Patrim?nio Natural (RPPN) Fartura possui ?rea de 1,5 mil ha, dos quais aproximadamente 40 se encontram dominados por Pteridium aquilinum (samambaia). Esta esp?cie est? oferecendo grande risco a biodiversidade do local, visto que a mesma apresenta elevado potencial invasor e capacidade de competi??o, podendo inibir a regenera??o natural e atrasar a sucess?o por s?culos. Diante disso, objetivou-se com este trabalho definir t?cnicas de controle populacional de Pteridium aquilinum e induzir a regenera??o natural, assim como avaliar a resposta de algumas esp?cies de r?pido crescimento submetidas a doses crescentes de calc?rio, com potencial para serem utilizadas na restaura??o desta ?rea. O primeiro estudo foi desenvolvido em uma ?rea dominada por samambaia, utilizando delineamento em blocos casualizados arranjado em esquema fatorial 3 x 2, consistindo em tr?s t?cnicas de controle (ro?ada mecanizada, glyphosate e paraquat), removendo ou n?o a serrapilheira das parcelas. Foram alocadas parcelas de 10 x 10 m distribu?das em 3 blocos. Ap?s seis meses, foram avaliados a porcentagem de cobertura de samambaia e de radia??o fotossinteticamente ativa (RFA) incidente sobre o solo, assim como o n?mero de indiv?duos regenerantes e a diversidade para cada tratamento. Os resultados indicaram que o controle qu?mico, tanto por glyphosate quanto por paraquat, promoveu maior redu??o de samambaia e que a remo??o da serrapilheira favoreceu o ingresso de indiv?duos e o aumento da diversidade. O segundo estudo foi realizado em casa de vegeta??o, na Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM, em delineamento em blocos casualizados com 3 repeti??es. Os tratamentos consistiram em elevar a satura??o por bases do substrato a 50, 70 e 90%, al?m do tratamento controle (sem corre??o). O substrato utilizado foi coletado na ?rea do primeiro estudo com o m?ximo de ra?zes de samambaia, corrigido com a quantidade de calc?rio determinada para cada tratamento e distribu?do em vasos de 10 dm?, onde as mudas de quatro esp?cies arb?reas foram plantadas. As esp?cies utilizadas foram: Anadenanthera colubrina (angico), Enterolobium contortisiliquum (orelha de macaco), Inga sessilis (ing?) e platycyamus regnelii (pau pereira). As vari?veis avaliadas foram di?metro e altura das mudas e a massa seca de samambaia. As esp?cies angico e orelha de macaco se mostraram sens?veis ? acidez do solo, sendo responsivas ao aumento da satura??o por bases. J? as esp?cies ing? e pau pereira s?o mais tolerantes ?s condi??es de acidez do solo, por?m, tamb?m obtiveram melhor desenvolvimento com a calagem. A samambaia apresentou aumento da massa seca com a eleva??o da satura??o por bases, mostrando que a calagem n?o ? uma pr?tica adequada para o controle dessa esp?cie. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, [2016]. / The Private Reserve of Natural Heritage (RPPN) Fartura has 1500 ha area of which approximately 40 are dominated by Pteridium aquilinum (bracken). This specie is offering great risk to the biodiversity of the site, since it has a high invasive potential and competitive ability and can inhibit natural regeneration and delay the succession for centuries. Therefore the aim of this study was to define techniques for promoting Pteridium aquilinum population control and induce natural regeneration, as well as to evaluate the response of some fast growing species exposed to increasing doses of limestone with potential to be used in the restoration of this area. The first study was conducted in an area dominated by bracken, using a randomized block design arranged in a factorial 3 x 2. It consisted of three control techniques (mechanized mowing, glyphosate and paraquat), removing or not litter from the plots. They were allocated 10 x 10 m plots into 3 blocks. After six months the bracken coverage percentage and photosynthetically active radiation (PAR) incident on the ground were evaluated,, as well as the number of regenerating individuals and diversity for each treatment. The results indicated that the chemical control both glyphosate as paraquat promoted greater reduction of bracken and the removal of litter favored the entry of individuals and increased diversity. The second study was conducted in a greenhouse at Federal University of Vales do Jequitinhonha and Mucuri - UFVJM under a randomized block design with three replications. The treatments consisted of raising the base saturation of the substrate 50, 70 and 90% beyond the control treatment (no correction). The substrate used was collected in the first study area with maximum bracken roots, corrected by the amount of certain limestone for each treatment and distributed in pots of 10 dm?, where the seedlings of four tree species were planted: Anadenanthera colubrina (angico), Enterolobium contortisiliquum (orelha de macaco), Inga sessilis (ing?) Platycyamus regnelii (pau pereira). The variables were diameter and seedling height and dry mass of bracken. The angico species and orelha de macaco were sensitive to soil acidity, being responsive to the increase in base saturation. The species ing? and pau pereira are more tolerant to soil acidity conditions, but they also had better development with liming. Bracken showed an increase in dry matter with increasing base saturation, showing that liming is not an appropriate practice for controlling these species.