Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2016-10-10T21:22:05Z No. of bitstreams: 1 Disserta??o_vf.pdf: 7117187 bytes, checksum: eca7e53d02b2ae3071a9528a28253c88 (MD5) / Made available in DSpace on 2016-10-10T21:22:05Z (GMT). No. of bitstreams: 1 Disserta??o_vf.pdf: 7117187 bytes, checksum: eca7e53d02b2ae3071a9528a28253c88 (MD5) Previous issue date: 2016-03-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / In Brazil, Rubiaceae is the fourth family with greater diversity of species and is represented by 125 genera and 1392 species, mostly distributed in the Amazon and Atlantic forests. Due to the heterogeneity of habitat and vegetation types, Bahia stands out for the richness of species in the family (ca. 368 spp.) and by the record of many endemic species. Among the areas that are recognized by the lack of floristic inventories in the state, there is the southwest region, more precisely the areas that comprise the Espinha?o Septentrional. Thus, the aim of this study was to conduct a floristic and taxonomic survey of Rubiaceae to the Serra Geral of Lic?nio de Almeida (SGLA), Bahia. Ten field trips were conducted between July 2012 and May 2015, covering all existing vegetation types in the area. The collected materials were processed and deposited in the HUEFS and ALCB herbaria. Reference materials were also analyzed in visits to herbaria ALCB, CEPEC, HRB, HUEFS, RB and SPF. A number of 43 species distributed in 28 genera were recognized and collected, being Declieuxia (5 spp.), Borreria (3 spp.), Cordiera (3 spp.) and Psychotria (3 spp.) the most diverse genera. Following the previous floristic studies in Espinha?o Range, there are large number of genera (19) with only a single species. Psyllocarpus asparagoides, Psyllocarpus laricoides and Stachyarrhena reflexa are endemic to Minas Gerais and Bahia; Declieuxia passerina and Galianthe peruviana are new records for Bahia, and two species are considered new for science (Randia sp. and Staelia sp.). Keys to generic and specific identification, descriptions, taxonomic and biologic comments for all species are presented, as well as photos and illustrations. / Rubiaceae ? a quarta fam?lia com maior riqueza de esp?cies no Brasil e est? representada por 125 g?neros e 1392 esp?cies, distribu?das predominantemente nos dom?nios Amaz?nico e Atl?ntico. Devido ? heterogeneidade de habitats e fitofisionomias, a Bahia destaca-se pela riqueza de esp?cies para a fam?lia (ca. 368 spp.) e pelo registro de muitas esp?cies end?micas. Dentre as ?reas que s?o reconhecidas pela car?ncia de invent?rios flor?sticos no estado, destaca-se a regi?o sudoeste, mais precisamente as ?reas que compreendem o Espinha?o Setentrional. Desta forma, o objetivo deste estudo foi realizar o levantamento flor?stico e taxon?mico de Rubiaceae para a Serra Geral de Lic?nio de Almeida (SGLA), Bahia. Foram realizadas dez viagens de coleta entre julho de 2012 e maio de 2015, abrangendo todas as fitofisionomias existentes na ?rea. Os materiais coletados foram processados e depositados nos Herb?rios HUEFS e ALCB. Materiais de refer?ncia foram tamb?m analisados em visita aos herb?rios ALCB, CEPEC, HRB, HUEFS, RB, SPF. Foram reconhecidas e coletadas 43 esp?cies, distribu?das em 28 g?neros, sendo Declieuxia (5 spp.), Borreria (3 spp.), Cordiera (3 spp.) e Psychotria (3 spp.) os g?neros mais diversos e, seguindo os estudos flor?sticos pr?vios na Cadeia do Espinha?o, houve um grande n?mero de g?neros (19) com apenas uma ?nica esp?cie. Psyllocarpus asparagoides, Psyllocarpus laricoides, Stachyarrhena reflexa s?o end?micas de Minas Gerais e Bahia; Declieuxia passerina e Galianthe peruviana s?o novas ocorr?ncias para a Bahia, e duas esp?cies s?o consideradas in?ditas para a ci?ncia (Randia sp. e Staelia sp.). S?o apresentados chaves de identifica??o gen?rica e espec?fica, descri??es, coment?rios taxon?micos para as esp?cies, al?m de fotos e ilustra??es.

Submitted by Luis Ricardo Andrade da Silva (lrasilva@uefs.br) on 2016-01-20T23:04:34Z No. of bitstreams: 1 Mestrado.Bot?nica.pdf: 77014571 bytes, checksum: e823b55239db9b7f35340f49cc671b93 (MD5) / Made available in DSpace on 2016-01-20T23:04:34Z (GMT). No. of bitstreams: 1 Mestrado.Bot?nica.pdf: 77014571 bytes, checksum: e823b55239db9b7f35340f49cc671b93 (MD5) Previous issue date: 2013-03-22 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Serra Geral de Lic?nio de Almeida (SGLA) is located in the central portion of the Espinha?o range, a region with no floristic studies. This paper presents the inventory of Asteraceae for the SGLA. Samples were collected in six bimonthly field trips (2011-2012) and the collected materials are inserted at HUEFS Herbarium. The results are presented in the checklist of the species, keys to tribes and species, followed by comments, aspects of reproductive phenology and geographical distribution of each species. Eighty-three species and 38 genera were found, represented in 12 tribes of Asteraceae. Of these, 13 are new records for Bahia state (Aldama oblongifolia, Aldama bracteata, Aspilia eglerii, Aspilia floribunda, Dasyphyllum vagans, Eremanthus polycephalus, Gochnatia discolor, Lychnophora ramosissima, Lepidaploa barbata, Lessingianthus laevigatus, Lessingianthus psilophyllus, Mikania obtusata e Proteopsis argentea) and two are new species to science (Lychnophora sp. 1 and Anteremanthus sp. nov.). The most representative tribe was Vernonieae (36 spp.), followed by Eupatorieae (17 spp.) and Heliantheae (8 spp.). The genera with the largest number of species were Lessingianthus (eight spp.), followed by Lepidaploa, Vernonanthura and Gochnatia, with five species each. A map of the study area with the respective collection sites and unpublished illustrations of Agrianthus myrtoides, Aspilia floribunda, Anteremanthus sp. nov., Chresta harleyi, Gochnatia densicephala, Lychnophora sp. 1 and Stomatanthes polycephalus are included as part of the results. / A Serra Geral de Lic?nio de Almeida (SGLA) est? localizada na por??o central da Cadeia do Espinha?o, regi?o carente em pesquisas bot?nicas. Neste trabalho ? apresentado um levantamento flor?stico da flora de Asteraceae para a SGLA. As coletas foram realizadas atrav?s de seis viagens bimestrais (2011-2012) ao campo e o material coletado encontra-se inserido no Herb?rio HUEFS. Os resultados s?o apresentados atrav?s do checklist das esp?cies, chaves de tribos e de esp?cies, seguido de coment?rios diagn?sticos, aspectos da fenologia reprodutiva e distribui??o geogr?fica de cada t?xon. Foram encontrados 12 tribos, 38 g?neros e 82 esp?cies. Destas, 13 s?o novas ocorr?ncias para o estado da Bahia (Aldama oblongifolia, Aldama bracteata, Aspilia eglerii, Aspilia floribunda, Dasyphyllum vagans, Eremanthus polycephalus, Gochnatia discolor, Lychnophora ramosissima, Lepidaploa barbata, Lessingianthus laevigatus, Lessingianthus psilophyllus, Mikania obtusata e Proteopsis argentea) e duas s?o esp?cies novas para a ci?ncia (Lychnophora sp. 1 e Anteremanthus sp. nov.). A tribo mais representativa foi Vernonieae (36 spp.), seguida de Eupatorieae (17 spp.) e Heliantheae (oito spp.). O g?nero com maior n?mero de esp?cies foi Lessingianthus (oito spp.), seguido de Lepidaploa, Vernonanthura e Gochnatia, com cinco esp?cies cada. Como parte dos dados ? inclu?do o mapa da ?rea de estudo e as respectivas localidades de coleta, al?m das ilustra??es in?ditas de Agrianthus myrtoides, Aspilia floribunda, Anteremanthus sp. nov., Chresta harleyi, Gochnatia densicephala, Lychnophora sp. 1. e Stomatanthes polycephalus.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:35Z No. of bitstreams: 5 47.pdf: 2283518 bytes, checksum: 0cb380e74b0df649714290d50610a24f (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 2015-02-27T19:01:57Z (GMT) No. of bitstreams: 5 47.pdf: 2283518 bytes, checksum: 0cb380e74b0df649714290d50610a24f (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 2015-02-27T19:01:57Z (GMT). No. of bitstreams: 5 47.pdf: 2283518 bytes, checksum: 0cb380e74b0df649714290d50610a24f (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 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / (Fenologia, biologia reprodutiva, germina??o e desenvolvimento inicial de Cipocereus minensis subsp. leiocarpus N.P.Taylor & Zappi (Cactaceae) no planalto de Diamantina-MG). No Brasil a fam?lia Cactaceae ? representada por 160 esp?cies, das quais 26% ocorrem em campos rupestres. Cipocereus minensis ? uma Cactaceae end?mica dos campos rupestres da por??o mineira da cadeia do Espinha?o. Neste estudo pretendeu-se avaliar os ritmos de produ??o de flores e frutos da esp?cie, sua biologia floral e reprodutiva, al?m de conhecer seus visitantes florais e prov?veis dispersores de sementes, numa ?rea de campo rupestre do planalto de Diamantina-MG. Foram realizados testes de germina??o de sementes e avaliado o desenvolvimento inicial das plantas em diferentes substratos. A esp?cie apresentou caracter?sticas florais como antese noturna, flores brancas, volume abundante de n?ctar e estruturas do perianto r?gidas que sugeriram poliniza??o por morcegos. No entanto, observou-se tamb?m a presen?a de polinizadores diurnos como beija-flores. O sistema reprodutivo de C. minensis ? alog?mico, auto-incompat?vel e os visitantes noturnos foram mais eficientes que os diurnos na forma??o de frutos. O padr?o fenol?gico de flora??o e frutifica??o ? subanual, com picos de flora??o no in?cio e meio da esta??o seca, em abril e julho, respectivamente. Um outro pico foi observado na esta??o ?mida, em novembro, com menor produ??o de flores, por?m com maior taxa de convers?o flor/fruto. C. minensis ? uma esp?cie bem adaptada ? sazonalidade clim?tica. Os frutos apresentaram diferen?as significativas com rela??o ? ?poca de coleta quanto ao comprimento, di?metro e peso, com maiores valores na esta??o ?mida. A m?dia do n?mero de sementes por fruto foi de 958,63 ? 369,35, o peso de 1000 sementes foi de 0,53 g e a m?dia do comprimento das sementes foi de 1,5 mm. As maiores taxas de germina??o foram obtidas ap?s nove e doze meses de armazenamento (75% e 72%, respectivamente), ou em frutos coletados no est?gio mais avan?ado de matura??o (72%). No crescimento inicial as plantas apresentaram maiores di?metros e alturas no substrato preparado na propor??o 1:1:1, composto de areia, solo vermelho e esterco de boi. O armazenamento favoreceu a germina??o, que tamb?m foi alta em frutos coletados em est?gios mais avan?ados de matura??o. Substratos com melhor drenagem e aera??o favoreceram um melhor desenvolvimento inicial de plantas dessa esp?cie. Estas informa??es dar?o subs?dios para o desenvolvimento de estrat?gias de conserva??o e manejo da esp?cie. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT In Brazil the Cactaceae is represented by 160 species from which 26% occur on the rocky fields. Cipocereus minensis is an endemic Cactaceae from the rocky fields in the Minas Gerais? portion of the Espinha?o chain. In this research it was intended to evaluate the rhythms of flower and fruit production of the species, its floral and reproductive biology, and also know the floral visitors and the likely seed dispersers, in an area of the rocky fields of the Diamantina ? MG?s plateau. Seed germination tests have been performed and the initial plant growth on different substrates was analyzed. The species had floral traits such as nocturnal anthesis, white flowers, abundant volume of nectar and rigid perianth structures that suggested pollination by bats. However daily visitors as hummingbirds were also observed. The reproductive system of C. minensis is alogamic and self incompatible and the night visitors were more efficient than the daytime ones in the formation of fruits. The phenologic pattern of flowering and fruiting is sub-annual, with peak of flowering at the beginning and middle of the dry season, in april and july, respectively. Another peak was observed in the wet season in november, with lower production of flowers, but with a higher flower/fruit conversion rate . C. minensis is well adapted to the climatic seasonality. The fruits showed significant differences with respect to collection time for the length, diameter and weight, with higher measures in the wet season. The average number of seeds per fruit was 958.63 ? 369.35, the weight of 1000 seeds was 0.53 g and the mean length of the seeds was 1.5 mm. The highest germination rates were found after nine and twelve months of storage (75% and 72%, respectively) or in fruits collected with a more advanced stage of ripening (72%).In the initial growth the plants showed a higher diameter and height on the substrate prepared in the ratio 1:1:1, composed of sand, red soil and cow dung. The store promotes germination, but also in fruits collected in a more advanced stage of maturation. Substrates with better drainage and aeration favoring better initial development of this plant species. This information will provide subsidies for the development of strategies of conservation and management of the species.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:30:37Z No. of bitstreams: 5 65.pdf: 1478609 bytes, checksum: 3267d3f03abffcb32e457026cf296e53 (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 2015-02-27T19:47:24Z (GMT) No. of bitstreams: 5 65.pdf: 1478609 bytes, checksum: 3267d3f03abffcb32e457026cf296e53 (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 2015-02-27T19:47:24Z (GMT). No. of bitstreams: 5 65.pdf: 1478609 bytes, checksum: 3267d3f03abffcb32e457026cf296e53 (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 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / A fam?lia Leguminosae ? composta por cerca de 727 g?neros e 19.325 esp?cies e, ? bem representada na Serra do Espinha?o, considerada Reserva da Biosfera pela UNESCO, portadora de alto grau de endemismos e esp?cies raras, que vem sofrendo com a perda de habitats pela a??o antr?pica. Muitas esp?cies de leguminosas apresentam potencial para recupera??o de ?reas degradadas, uma vez que possuem associa??o com bact?rias fixadoras de nitrog?nio, principalmente as do g?nero Chamaecrista. Contudo, existem poucas informa??es a respeito das esp?cies desse g?nero. E, considerando a import?ncia biol?gica dos campos rupestres, a ecol?gica das leguminosas e a lacuna de conhecimento que se tem sobre as esp?cies da flora na Cadeia do Espinha?o no Planalto de Diamantina, MG, esse estudo teve como objetivo conhecer os aspectos relacionados ? fenologia e germina??o de sementes de Chamaecrista debilis (Vogel) Irwin e Barneby. As observa??es fenol?gicas foram realizadas em ?reas de campos rupestres no campus da Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Diamantina-MG. Os testes de germina??o foram conduzidos no Laborat?rio de Sementes da UFVJM. Foram marcados e monitorados 30 indiv?duos da esp?cie, onde avaliou-se quinzenalmente, de abril de 2010 a mar?o de 2011, as seguintes fenofases: caducifolia, brota??o, flora??o e dispers?o. Verificou-se que a brota??o e flora??o, estiveram associadas com a esta??o ?mida enquanto a dispers?o e a queda de folhas com a esta??o seca. Para avaliar a germina??o foi efetuado um teste de germina??o com 12 tratamentos: testemunha, escarifica??o com lixa d??gua n.80, imers?o em ?gua a 100oC por 5, 10, 15 , 30 e 60 segundos e imers?o em ?cido sulf?rico concentrado por 5, 10, 15, 30 e 60 segundos. Foram avaliadas as porcentagens de germina??o das sementes, o ?ndice de velocidade de germina??o e do teor de ?gua das sementes de Chamaecrista debilis. Utilizou-se o delineamento inteiramente casualizado com quatro repeti??es, e as m?dias foram comparadas pelo teste de Scott-Knott, a 5% de probabilidade. Os dados indicaram que a sazonalidade clim?tica da regi?o ? determinadora dos padr?es fenol?gicos em Chamaecrista debilis. Para a germina??o verificou-se que as sementes apresentaram teor de ?gua de 11,71%. Os tratamentos com ?gua a 1000C a 5, 10 e 15 segundos e ?cido sulf?rico a 15 segundos foram os mais eficientes em promover a germina??o. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT The family Leguminosae comprises about 727 genera and 19,325 species, and is well represented in the Espinha?o considered a Biosphere Reserve by UNESCO, the bearer of a high degree of endemic and rare species, which has suffered the loss of habitats by human activity. Many species of legumes have potential for recovery of degraded areas, as they have an association with nitrogen fixing bacteria, especially those of the genus Chamaecrista. However, little information exists about the species of this genus. And considering the biological importance of the stony fields, the leguminous plants and ecological knowledge gap that exists about the species of flora in the Espinha?o of the Diamantina Plateau, Minas Gerais (MG), Brazil, this study aimed to understand the aspects related to phenology and germination seeds of Chamaecrista debilis (Vogel) Irwin and Barneby. The phenological observations were carried out in areas of rocky fields on the campus of University of the Valleys of Jequitinhonha and Mucuri (UFVJM), Diamantina, MG. Germination tests were conducted at the Laboratory of Seeds of UFVJM. Were marked and monitored 30 individuals of the species, which we assessed biweekly from April 2010 to March 2011, the following phenophases: shedding, budding, flowering and seed dispersal. It was found that the budding and flowering, were associated with the wet season while the dispersion and fall of leaves in the dry season. To evaluate the germination, a germination test conducted with 12 treatments: control, scarification with sandpaper n.80, in water at 1000C for 5, 10, 15, 30 and 60 seconds and immersion in concentrated sulfuric acid for 5, 10, 15, 30 and 60 seconds. We evaluated the germination of seeds, the germination speed index and water content of seeds of Chamaecrista debilis. We used a completely randomized design with four replications and means were compared by Scott-Knott test at 5% probability. The data indicated that the climate in the region is the determinant of phenological patterns in Chamaecrista debilis. For germination was found that the seeds had a water content of 11.71%. The treatment with water at 1000C to 5, 10 and 15 seconds and 15/2 sulfuric acid were more effective in promoting germination.

Data de aprova??o retirada da vers?o impressa do trabalho. / ?rea de concentra??o: Produ??o Vegetal. / Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2018-08-14T22:18:43Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) camila_rodrigues_costa.pdf: 5661319 bytes, checksum: b9deab885dfc53d90534a8a979f8d00d (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-10-05T19:35:26Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) camila_rodrigues_costa.pdf: 5661319 bytes, checksum: b9deab885dfc53d90534a8a979f8d00d (MD5) / Made available in DSpace on 2018-10-05T19:35:26Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) camila_rodrigues_costa.pdf: 5661319 bytes, checksum: b9deab885dfc53d90534a8a979f8d00d (MD5) Previous issue date: 2018 / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / As turfeiras s?o ambientes de transi??o entre os ecossistemas terrestres e aqu?ticos, formados pela acumula??o sequencial de mat?ria org?nica. Extremamente sens?veis as mudan?as nos padr?es de precipita??o e temperatura, as turfeiras s?o consideradas verdadeiros arquivos da evolu??o do ambiente ao seu redor. Nas depress?es das ?reas dissecadas da Serra do Espinha?o Meridional, Minas Gerais, ocorrem ambientes propicios para forma??o de turfeiras. Dentre elas encontra-se a turfeira do Rio Preto (18?14'5,25"S e 43?19'7,24" WGS, 1.593 m.s.m) inserida no Parque Estadual do Rio Preto. A turfeira do Rio Preto ? colonizada por diferentes fisionomias do Bioma Cerrado principalmente o Campo ?mido e Campo Rupestre, sendo encontrados ainda redutos de Floresta Estacional Semidecidual (Cap?es de Mata). O objetivo deste trabalho foi reconstituir as mudan?as paleoambientais ocorridas desde o final do Pleistoceno Tardio. Para isto foi utilizada uma abordagem multi-proxy, consistindo em estratigrafia do perfil do solo da turfeira, an?lises palinol?gicas, de is?topos est?veis (13C e 15N), de composi??o geoqu?mica e data??es radiocarb?nicas. A idade mais antiga, obtida da base do testemunho, foi de 23.037 anos cal. AP, indicando que a forma??o da turfeira se deu a partir do Pleistoceno Tardio. A partir da an?lise conjunta dos proxys foi poss?vel inferir cinco principais fases de mudan?as paleoambientais: RP-I, entre ~ 23.037 e 13.500 anos cal. AP, clima bastante ?mido e frio, possibilitando a presen?a de indicadores de Floresta Montana e o empobrecimento do sinal isot?pico. Este foi um per?odo de bastante instabilidade na bacia hidrogr?fica da turfeira, inferida pelo alto teor de Si, indicador de sinal de material mineral local; RP-II, entre ~13.500 e 11.700 anos cal. AP, ligeiro aumento da temperatura e queda na umidade levando a redu??o de indicadores de clima frio e a expans?o da vegeta??o campestre. No entanto as condi??es ainda eram mais ?midas e frias que as atuais, e a ind?cios de diminui??o do sinal de material mineral local; RP-III, entre ~11.700 e 8.500 anos cal. AP, tend?ncia de aumento da temperatura e diminui??o da umidade em conjunto com a mudan?a da vegeta??o de plantas C3 para C4, causando a forte retra??o das Floresta Estacional Semidecidual e Floresta Montana, em conjunto aumento do fluxo de sinal de material mineral local; RP-IV, entre ~8.500 e 7.000 anos cal. AP, condi??es de clima ainda mais seco e quente, causando o desaparecimento dos indicadores de clima frio, retra??o do Campo ?mido e expans?o do Campo Rupestre. Per?odo de bastante estabilidade da bacia hidrogr?fica da turfeira, sugerido pelo baixo conte?do de material mineral; RP-V, de 7.000 anos cal. AP at? o presente, clima era novamente mais ?mido e temperaturas mais amenas, semelhante ?s condi??es atuais, aumento na acumula??o de turfa, possibilitando o reaparecimento dos indicadores de Floresta Montana e Floresta Estacional Semidecidual junto com a retra??o do Campo, e diminui??o da entrada de material mineral. Flutua??es no clima influenciaram fortemente as mudan?as na paleovegeta??o e na estrutura sedimentar do registro da turfeira do Rio Preto. Devido ? import?ncia das turfeiras, n?o s? como arquivo de mudan?as paleoambientais, mas tamb?m pelos seus servi?os ambientais (armazenamento de ?gua e de carbono), estes ambientes precisam ser melhores protegidos. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2018. / The peatlands are transitional environments between terrestrial and aquatic ecosystems, formed by the sequential accumulation of organic matter. Extremely sensitive to changes in precipitation and temperature patterns, peatlands are real archives of the evolution of the environment around them. In Serra do Espinha?o Meridional, Minas Gerais State, Brazil, in depressions of the dissected areas occurs an environment conducive to formation of peatlands. Among them the peatland of Rio Preto (18?14'5,25"S e 43?19'7,24" WGS, 1.593 m.s.m), located in the Rio Preto State Park. The area is colonized by different vegetation physiognomy of the Cerrado Biome, mainly Rupestre Fields and Wet Fields, beyond of redoubts of Semidecidual Stationary Forests, called Capon Forests. The area is colonized by different vegetation physiognomy of the Cerrado Biome, mainly Rupestre Fields and Wet Fields, beyond of redoubts of Semidecidual Stationary Forests, called Capon Forests. The objective of this work was to reconstruct the paleoenvironmental changes that have occurred since the Late Pleistocene. The work was constituted by the application of a multi-proxy approach, such as peatland soil stratigraphy, palynological analyzes, stable isotopes (13C and 15N), geochemical composition analyzes and 14C dating. The oldest age obtained at the base of the peatland profile was 23.037 cal. years BP, indicating that the formation of the peatland occurred during the Late Pleistocene. In this study it was possible to infer five main stages of paleoenvironmental changes: RP-I ~23.000-13.500 cal. years BP, very cold climate and very humid, presence of Montana Forest indicators and impoverishment of the isotopic signal, period of instability in hydrographic basin of the peatland; RP-II ~13.500-11.700 cal. years BP, small increase in temperature and decreased humidity, reduction of the indicators of cold climate and the expansion of the field vegetation, however the climatic conditions were more humid and cooler than the current, decrease of the entrance of local mineral material; RP-III ~11.700-8.500 cal. years BP, trend of increased temperature and decreased humidity, change in vegetation from C3 to C4 plants, reduction of the Semideciduous Seasonal Forest and Mountain Forests, increased flow of local mineral material; RP-IV ~8.500-7.000 cal. years BP, drier and hotter weather, causing the disappearance of the indicators of cold weather, retraction of the Wet Field and expansion of Rupestre Field. Period of very stability in the watershed of the peatland; RP-V 7.000 cal. years BP until present, increased humidity and decrease in temperature, as current conditions, increased accumulation of peat, reappearance of the indicators of Montana Forest and Seasonal Semideciduous Forest and retraction of the Field, decrease of regional and local dust. Fluctuations in the climate influenced changes in paleovegetation and the sedimentary structure of the peatland Rio Preto. Given the value of peatlands as archives of paleoenvironmental changes and their environmental functions, these environments need to be better protected.