Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2016-06-14T22:30:10Z No. of bitstreams: 1 Dissertacao_Carla Tatiana V. D. Martins_vers?o final_2015.pdf: 2037176 bytes, checksum: dfe3acdbfbe2872a1422844d30ad25bd (MD5) / Made available in DSpace on 2016-06-14T22:30:10Z (GMT). No. of bitstreams: 1 Dissertacao_Carla Tatiana V. D. Martins_vers?o final_2015.pdf: 2037176 bytes, checksum: dfe3acdbfbe2872a1422844d30ad25bd (MD5) Previous issue date: 2015-03-30 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The present study aimed to contribute to the knowledge of the vascular flora of riparian vegetation on top of the basin in the river Paragua?u. In this basin, it was performed the characterization of the composition and structure of riparian fragments of the Upper Paragua?u River and of the Sert?ozinho Stream in Mucug? - BA. For the floristic survey, field expeditions were carried out monthly, from September 2013 to May 2014, during which it was collected samples of fertile specimens in transects along the river, in a range of 50 meters wide. For the phytosociological analysis it was used the Point-centred Quarter Method (102 points for each area) in 17 transects, considering all the woody individuals, with stem diameter at ground level (DGL) ? 3 cm and height above 1.30 m. The floristic results were compared with other areas of riparian vegetation of the Chapada Diamantina and analysis of the structure of the vegetation was performed using the program Fitopac. I was recorded 117 species at the Upper Paragua?u River and 83 at Sertaozinho stream, with 21 common to both environments. Among the families registered with the highest species richness, Fabaceae and Asteraceae were common to both sites. In riparian vegetation at Upper Paragua?u River Vochysia pyramidalis was considered one of the most abundant species, while in Sert?ozinho Stream, Paralychnophora harleyi (H.Rob.) D.J.N. and Senna cana (Nees & Mart.) H.S.Irwin & Barneby are among the most significant in number of individuals. Regarding the importance value index (IVI), the other species are among the ten most significant in both studied areas. The floristic composition of the Upper Paragua?u River showed greater wealth than the Sertaozinho stream. The analysis of similarity between the surveys of riparian vegetations of the Chapada Diamantina revealed the formation of two groups with low similarity (? 16%). The riparian vegetation found at the top of the watershed of Paragua?u River showed distinct physiognomies, being one of riparian vegetation and other of transition between riparian vegetation and rocky fields. The concentration of individuals in the initial diameter classes indicated that the area is found in intermediate stage of succession. Furthermore, there was the presence of areas with monodominance and high wealth of ruderal species. Despite the anthropic process found, the studied area had a high local diversity when compared with other studies conducted in the region. The composition of the vegetation in the Sert?ozinho Stream proved to be diversified with the occurrence of rare and endangered species. These same areas when compared to other riparian vegetation in the Chapada Diamantina showed low similarity, reinforcing the argument that even geographically close vegetations can have distinct floristic composition, showing a high heterogeneity. / O presente estudo teve por objetivo contribuir para o conhecimento da flora vascular de vegeta??es ciliares no alto da bacia hidrogr?fica no rio Paragua?u. Nessa bacia, foi realizada a caracteriza??o da composi??o e estrutura de fragmentos ciliares do alto do rio Paragua?u e do c?rrego Sert?ozinho, em Mucug? - BA. Para o levantamento flor?stico, expedi??es a campo foram realizadas mensalmente, no per?odo de setembro de 2013 a maio de 2014, durante as quais foram coletadas amostras de esp?cimes f?rteis em transectos ao longo do rio, em uma faixa de 50 metros de largura. Para a an?lise fitossociol?gica foi utilizado o m?todo do ponto quadrante (102 pontos para cada ?rea) em 17 transectos, considerando todos os indiv?duos lenhosos com di?metro do caule ao n?vel do solo (DNS) ? 3 cm e com altura superior 1,30 m. Os resultados flor?sticos foram comparados entre outras ?reas de vegeta??es ciliares da Chapada Diamantina e a an?lise da estrutura da vegeta??o foi realizada por meio do programa FITOPAC. Foram registradas 117 esp?cies no alto do rio Paragua?u e 83 no c?rrego Sert?ozinho, com 21 comuns aos dois ambientes. Dentre as fam?lias registradas com maior riqueza de esp?cies, Fabaceae e Asteraceae foram comuns aos dois locais. Na mata ciliar no alto do rio Paragua?u Vochysia pyramidalis Mart. foi considerada uma das esp?cies mais abundantes, enquanto que no c?rrego Sert?ozinho, Paralychnophora harleyi (H.Rob.) D.J.N.Hind e Senna cana (Nees & Mart.) H.S.Irwin & Barneby est?o entre as mais expressivas em n?mero de indiv?duos. Com rela??o ao ?ndice de Valor de Import?ncia (IVI), essas mesmas esp?cies est?o entre as dez mais representativas nas duas ?reas estudadas. A composi??o flor?stica do alto do rio Paragua?u apresentou maior riqueza do que o c?rrego Sert?ozinho. A an?lise de similaridade entre os levantamentos de matas ciliares da Chapada Diamantina revelou a forma??o de dois grupos com baixa similaridade (? 16%). A vegeta??o ribeirinha encontrada no alto da bacia hidrogr?fica do rio Paragua?u apresentou fisionomias distintas, sendo uma de mata ciliar e outra de transi??o entre mata ciliar e campo rupestre. A concentra??o de indiv?duos nas classes iniciais de di?metros indicou que a ?rea encontra-se em est?gio intermedi?rio de sucess?o. Al?m disso, houve a presen?a de ?reas com monodomin?ncia e alta riqueza de esp?cies ruderais. Apesar do processo de antropiza??o encontrado, a ?rea estudada apresentou uma alta diversidade local, quando comparado com outros estudos realizados na regi?o. A composi??o da vegeta??o no c?rrego Sert?ozinho, mostrou-se diversificada com a ocorr?ncia de esp?cies raras e amea?ada de extin??o. Essas mesmas ?reas quando comparada com as demais vegeta??es ciliares na Chapada Diamantina apresentaram baixa similaridade, refor?ando o argumento de que mesmo vegeta??es pr?ximas geograficamente podem apresentar composi??o flor?stica distinta, evidenciando alta heterogeneidade.

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?.