Submitted by Raniere Barreto (raniere.barros@ufvjm.edu.br) on 2018-04-13T18:54:46Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) janaina_mendon?a_pereira.pdf: 5685433 bytes, checksum: e0beea54bf71016f5159bbeb314bd3d2 (MD5) / Rejected by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br), reason: Verificar keywords e ag?ncia financiadora on 2018-04-20T15:04:26Z (GMT) / Submitted by Raniere Barreto (raniere.barros@ufvjm.edu.br) on 2018-05-15T18:58:49Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) janaina_mendon?a_pereira.pdf: 5685433 bytes, checksum: e0beea54bf71016f5159bbeb314bd3d2 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-05-15T19:47:05Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) janaina_mendon?a_pereira.pdf: 5685433 bytes, checksum: e0beea54bf71016f5159bbeb314bd3d2 (MD5) / Made available in DSpace on 2018-05-15T19:47:05Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) janaina_mendon?a_pereira.pdf: 5685433 bytes, checksum: e0beea54bf71016f5159bbeb314bd3d2 (MD5) Previous issue date: 2016 / A ?rea de Prote??o Ambiental (APA) do Alto do Mucuri apresenta consider?veis remanescentes florestais de Mata Atl?ntica e tem sofrido intensa press?o antr?pica, principalmente por desmatamentos e queimadas. Esse conflito florestal poder? ser equacionado e atender aos interesses da sociedade atrav?s da implementa??o de eficientes pol?ticas p?blicas. Neste trabalho, objetivou-se sistematizar informa??es ambientais e correlacionar as mesmas com as pol?ticas p?blicas florestal e de prote??o ? biodiversidade. No estudo foram considerados para an?lise multicrit?rio o uso e cobertura do solo, a declividade, a densidade de drenagem, o tamanho de fragmentos florestais, dist?ncia dos corpos d??gua e crit?rios hidrogeol?gicos, que foram analisados atrav?s da metodologia de combina??o linear ponderada. Os crit?rios foram correlacionados com as pol?ticas p?blicas florestal e de prote??o ? biodiversidade propostas pela lei estadual, associadas ? restaura??o ecol?gica, conserva??o e prote??o ? biodiversidade, e produ??o sustent?vel. A utiliza??o de crit?rios hidrogeol?gicos no presente estudo ? uma inova??o em an?lises multicrit?rios para defini??o de ?reas priorit?rias para a conserva??o e recupera??o ambiental. A an?lise multicrit?rio realizada no presente estudo, atrav?s do m?todo de combina??o linear ponderada, permitiu a integra??o de diferentes crit?rios, que em conjunto, podem ajudar na tomada de decis?o de institui??es relacionadas ao ordenamento desse territ?rio. Muitos desses crit?rios se analisados de forma isolada, podem levar a a??es e pol?ticas que n?o correspondem a complexidade da regi?o e consequentemente podem n?o ser t?o efetivas quanto o necess?rio. Constatou-se que a regi?o possui alta sensibilidade ambiental quanto aos recursos h?dricos, por apresentar ?reas com altas declividades e alta densidade de drenagem, distribu?das em todo o territ?rio. Al?m disso, apresenta ?reas com ?guas e pacotes sedimentares superficiais que necessitam de cobertura florestal para manuten??o da estabilidade. Em conjunto, esses fatores indicam baixa capacidade de infiltra??o da ?gua e favorecimento ao escoamento superficial, prejudicando o balan?o h?drico da bacia hidrogr?fica. Desta forma, conclui-se que a regi?o possui alta depend?ncia de vegeta??o nativa e, portanto, demanda a??es que potencializem o aumento da cobertura florestal e a produ??o sustent?vel. Atrav?s da implementa??o de pol?ticas p?blicas adequadas ? realidade deste territ?rio, com plena participa??o social, ser? poss?vel proporcionar uma chance de real concilia??o entre a conserva??o das esp?cies, habitats e servi?os ecossist?micos, e o desenvolvimento econ?mico e social, numa das regi?es mais fr?geis do Estado de Minas Gerais. As estrat?gias de conserva??o e restaura??o ecol?gica, bem como de produ??o e uso sustent?vel, devem buscar abordagens integradoras, atrav?s da articula??o de iniciativas j? existentes, assim como do desenvolvimento de novas solu??es, adaptadas ? realidade local e regional, sobretudo com vistas ? prote??o dos recursos naturais e produ??o sustent?vel na APA do Alto do Mucuri. / Disserta??o (Mestrado Profissional) ? Programa de P?s-Gradua??o em Tecnologia, Sa?de e Sociedade, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016. / The Environmental Protection Area (APA) of Higth Mucuri River presents considerable forest remnants of the Atlantic Forest, and has suffered intense anthropic pressure, mainly by deforestation and fires. This forest conflict can be equated and serve the interests of society through the implementation of efficient public policies. In this work, the objective was to systematize environmental information and correlate them with forest public policies and biodiversity protection. In the study, the use and coverage of soil, declivity, drainage density, size of forest fragments, distance of water bodies and hydrogeological criteria were analyzed using a weighted linear combination methodology. The criteria were correlated with the forest public policies and biodiversity protection proposed by state law, associated with ecological restoration, conservation and protection of biodiversity, and sustainable production. The use of hydrogeological criteria in the present study is an innovation in multicriteria analyzes to define priority areas for conservation and environmental recovery. The multicriteria analysis performed in the present study, using the weighted linear combination method, allowed the integration of different criteria, which together can help in the decision making of institutions related to the planning of that territory. Many of these criteria, if analyzed in isolation, can lead to actions and policies that do not correspond to the complexity of the region and therefore may not be as effective as necessary. It was verified that the region has high environmental sensitivity regarding water resources, since it presents areas with high slopes and high density of drainage, distributed throughout the territory. In addition, it presents areas with water and surface sedimentary packages that need forest cover to maintain stability. Taken together, these factors indicate low water infiltration capacity and favoring surface runoff, damaging the water balance of the watershed. In this way, we conclude that the region has high dependence on native vegetation and, therefore, demands actions that increase the forest cover and sustainable production. Through the implementation of public policies appropriate to the reality of this territory, with full social participation, it will be possible to provide a real reconciliation between the conservation of species, habitats and ecosystem services and economic and social development in one of the most fragile regions of the State of Minas Gerais. Ecological conservation and restoration strategies, as well as production and sustainable use, should seek integrative approaches, through the articulation of existing initiatives, as well as the development of new solutions, adapted to the local and regional reality, especially with a view to protecting the Natural resources and sustainable production in The Environmental Protection Area of Higth Mucuri River.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2016-08-30T15:49:24Z No. of bitstreams: 1 2010 - Juliana M?ller Freire.pdf: 12006121 bytes, checksum: 145a6bd3be51d71faac2dfdc0a20e5c4 (MD5) / Made available in DSpace on 2016-08-30T15:49:24Z (GMT). No. of bitstreams: 1 2010 - Juliana M?ller Freire.pdf: 12006121 bytes, checksum: 145a6bd3be51d71faac2dfdc0a20e5c4 (MD5) Previous issue date: 2010-07-01 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior, CAPES, Brasil. / This study aimed to evaluate the structure and floristics of shrubs and trees in areas of northern and southern slopes in the southern portion of the Maci?o da Pedra Branca, Rio de Janeiro, RJ. We tested the hypothesis that different component orientations may influence the structure and floristic changes. In a sample area of 9.700 m2, divided into ten areas, were surveyed 1508 individuals, distributed in 324 species, 154 genera and 52 families. The families richest in species were: Myrtaceae, Lauraceae, Fabaceae, Rubiaceae and Euphorbiaceae. The Diversity Index Shannon-Wiener (H ') was 5.093 nats / indiv., And the evenness (J) was 0.881. Horizontal structure in the species Joannesia princeps, Piptadenia gonoacantha e Pseudopiptadenia contorta, Meternichia princeps, Apuleia leiocarpa, Astrocaryum aculeatissimum, Chrysophyllum flexuosum reached the highest value of phytosociological importance. A phytosociological analysis of each individual area indicated significant floristic and structural variations, with a trend toward greater diversity is found in areas of higher altitude and farther from the urban perimeter. Of the 324 species found in the study, 124 were found exclusively on the north side, 100 on the southern slope and 100 occurred in both strands. The exclusive species and more frequent on the north side were Brosimum guianense e Annona cacans, Zollernia ilicifolia, Couratari pyramidata, Lecythis pisonis e Gallesia integrifolia. On the southern slope, the exclusive species that stood out were Cariniana estrellensis, Cabralea canjerana, Eugenia microcarpa. Cluster analysis among the ten areas indicated, in general, greater similarity due to the proximity between areas than for the orientation of the slope, however comparing the north and south closer together, it is observed that the highest diversity indices, most proportion of rare species and unique and the most advanced stages of succession were found on the southern slope. The cases where this did not happen were observed in areas closer to the urban boundaries that regardless of the slope were less floristic diversity. The diameter distribution model presented inverted J, with a diameter range quite variable between areas. No pattern was found between the diameter distribution and orientation of the slope. Comparing the flora of Pedra Branca with other forest areas in Rio de Janeiro, there was generally a low floristic similarity. The major floristic identity occurred with the work in-house Pedra Branca, Serra da Tiririca, and Tijuca Forest. Works out of the city showed floristic similarity below 25%. The high diversity of the studied area is a reflection of its high environmental heterogeneity, related to differences in altitude, slope orientation, successional stage and history of use, which puts the Pedra Branca as a strategic area for species conservation in Rio de Janeiro. / Este trabalho teve como objetivo avaliar a estrutura e a flor?stica do estrato arbustivo e arb?reo em ?reas de encostas norte e sul, na por??o meridional do maci?o da Pedra Branca, Rio de Janeiro, RJ. Foi testada a hip?tese que diferentes orienta??es de vertente podem influenciar a estrutura e a flor?stica da vegeta??o. Em uma ?rea amostral de 9.700 m2, distribu?das em dez ?reas, foram inventariados 1.508 indiv?duos, distribu?dos em 324 esp?cies, 154 g?neros e 52 fam?lias. As fam?lias mais ricas em esp?cies na foram: Myrtaceae, Lauraceae, Fabaceae, Rubiaceae e Euphorbiaceae. O ?ndice de Diversidade de Shannon- Wiener (H?) foi de 5,093 nats/indiv., e a equabilidade (J) foi de 0,881. Na estrutura horizontal as esp?cies Joannesia princeps, Piptadenia gonoacantha e Pseudopiptadenia contorta, Meternichia princeps, Apuleia leiocarpa, Astrocaryum aculeatissimum, Chrysophyllum flexuosum alcan?aram o maior valor de import?ncia fitossociol?gico. A an?lise fitossociol?gica de cada ?rea indicou importantes varia??es estruturais e flor?sticas, com tend?ncia ? maior diversidade ser encontrada nas ?reas de maior altitude e mais distantes do per?metro urbano. Das 324 esp?cies encontradas no trabalho, 124 ocorreram exclusivamente na vertente norte, 100 na vertente sul e 100 ocorreram em ambas as vertentes. As esp?cies exclusivas e mais freq?ente na vertente norte foram o Brosimum guianense e Annona cacans, Zollernia ilicifolia, Couratari pyramidata, Lecythis pisonis e Gallesia integrifolia. Na vertente sul, as esp?cies exclusivas que mais se destacaram foram Cariniana estrellensis, Cabralea canjerana, Eugenia microcarpa. A an?lise de agrupamento entre as dez ?reas indicou, em geral, maior semelhan?a em decorr?ncia da proximidade entre ?reas do que pela orienta??o da encosta, entretanto comparando as vertentes norte e sul mais pr?ximas, observase que os maiores ?ndices de diversidade, a maior propor??o de esp?cies raras e exclusivas e os est?gios de sucess?o mais avan?ados foram encontradas na vertente sul. Os casos em que isso n?o ocorreu foram observados nas ?reas mais pr?ximas ao per?metro urbano que, independente da vertente apresentaram menor diversidade flor?stica. A distribui??o diam?trica apresentou modelo do J invertido, sendo a amplitude diam?trica bastante vari?vel entre ?reas. N?o foi encontrado um padr?o entre distribui??o diam?trica e a orienta??o da encosta. Comparando a flor?stica do trecho estudado do Maci?o da Pedra Branca com outras ?reas florestais do Rio de Janeiro, observou-se uma baixa similaridade flor?stica. A maior identidade flor?stica ocorreu com trabalhos realizados na pr?pria Pedra Branca, na Serra da Tiririca, e na Floresta da Tijuca. Trabalhos fora do munic?pio apresentaram similaridade flor?stica inferior a 25%. A elevada diversidade da ?rea estudada ? reflexo da sua alta heterogeneidade ambiental, relacionada a diferen?as na altitude, orienta??o de encosta, est?gio sucessional e hist?rico de uso, o que coloca a Maci?o da Pedra Branca como ?rea estrat?gica para conserva??o de esp?cies do munic?pio do Rio de Janeiro.

Made available in DSpace on 2014-12-17T14:10:18Z (GMT). No. of bitstreams: 1 CarolinaMCAL.pdf: 705892 bytes, checksum: 2a31e2f6fe2a3d439e931aaeb7c530eb (MD5) Previous issue date: 2008-05-26 / Coleodactylus natalensis Freire, 1999, an endemic species of Atlantic Forest fragments around the Natal municipality, Rio Grande do Norte State, Brazil, has as type locality the Parque Estadual Dunas de Natal (05?48 S to 05?53 S and 35?09 W to 35?12 W), one of the largest restinga (herb and shrub association on sand dunes along the Brazilian coastline) associate fragment, surrounded by urban zone, placed on setentrional Atlantic Forest limits. We made estimates on populational density, spatial distribution, habitat and microhabitat preferences and feeding ecological aspects like sazonal and sexual variations on diet, prey electivities and niche breadth. We randomly sampled ninety-six 50m2 quadrants in each of the four habitats identified in the study area. Were collected 49 specimens and their stomach contents were analyzed; prey items found were correlated with leaf-litter invertebrates from habitat samples. We found a 98,5 ? 75,5 individuals/ha density, in grouped distribution pattern on densest habitats and random distribution on others habitats. This species lives mostly on leaf-litter in forest habitats, in higher humidity points, with lower temperatures, deeper leaf litter and lower sea level elevations than the randomly chosen points in the study area. Isopoda and Aranae were the most important prey categories in numeric, frequency and volumetric terms. Niche breadth has an intermediate value and was variable in sexual and in habitat terms. There was no correlation between morfometric measures and prey size on diet. The C. natalensis population studied seems to be diet opportunist, although selects larger prey items. The Parque Estadual das Dunas do Natal has several indications of anthropic pressure from the surrounding urban area that may affects the local C. natalensis population. Thus, the fragility of this species calls for urgent conservation efforts / Coleodactylus natalensis Freire, 1999, esp?cie end?mica de remanescentes de Mata Atl?ntica do Estado do Rio Grande do Norte, Brasil, tem como localidade-tipo o Parque Estadual Dunas de Natal (05?48 S a 05?53 S e 35?09 W a 35?12 W), um dos maiores remanescentes associados a restingas, cercado por zona urbana, situado no limite setentrional da Mata Atl?ntica. Foram realizadas estimativas de densidade populacional, distribui??o espacial, prefer?ncias de h?bitat e microh?bitat e aspectos da ecologia alimentar, tais como varia??es sazonais e entre sexos de dieta, eletividade de presas e largura de nicho. Amostramos aleatoriamente 96 quadrantes de 50m2 em cada um dos quatro h?bitats identificados na ?rea. Foram coletados 49 exemplares, que tiveram seus conte?dos estomacais analisados; os itens de presa encontrados foram correlacionados com amostras de invertebrados ed?ficos obtidas no ambiente. Encontramos uma densidade m?dia de 98,5 ? 75,5 indiv?duos/ha, com distribui??o agrupada nos h?bitats de maior densidade e rand?mica nos demais. A esp?cie habita preferencialmente o folhi?o de h?bitats de mata, em pontos mais ?midos, temperaturas mais amenas, folhi?o mais denso e menores eleva??es em rela??o ao n?vel do mar do que a m?dia da ?rea de estudo. As categorias de presa mais importantes na dieta foram Isopoda e Aranae. A largura de nicho foi m?dia e variou sexualmente e entre os h?bitats. N?o houve correla??o entre medidas morfom?tricas e tamanho das presas consumidas. A popula??o de C. natalensis estudada parece ser oportunista em termos de dieta, embora selecione presas relativamente maiores. O Parque das Dunas ? uma ?rea que sofre diversos tipos de press?o antr?pica que podem afetar a popula??o de C. natalensis. Deste modo, a fragilidade desta esp?cie na ?rea denota urg?ncia por medidas conservacionistas

Made available in DSpace on 2014-12-17T14:10:20Z (GMT). No. of bitstreams: 1 DanielaFFM_DISSERT.pdf: 773191 bytes, checksum: 60b37210d19394ff5d3a3c0c9bfb1365 (MD5) Previous issue date: 2010-03-26 / Empresa de Pesquisa Agropecu?ria do Rio Grande do Norte / O presente trabalho consiste no levantamento taxon?mico da fam?lia Rubiaceae Juss., em um remanescente de floresta atl?ntica no estado do Rio Grande do Norte, ?rea conhecida localmente como Mata do Jiqui (5? 46' S e 35? 12' W). A Mata do Jiqui est? situada em uma fazenda pertencente ? Empresa de Pesquisa Agropecu?ria do Rio Grande do Norte (EMPARN) no munic?pio de Parnamirim e ocupa uma ?rea de 79 ha. A vegeta??o da ?rea ? classificada como Floresta Estacional Semidecidual, pertencendo ao dom?nio Mata Atl?ntica e o solo como Neossolos Quartizar?nicos ?rticos Latoss?licos. Este estudo foi baseado em an?lises morfol?gicas comparativas, utilizando amostras obtidas em campo no per?odo de setembro/2008 a setembro/2009 e cole??es herborizadas pertencentes ao acervo dos Herb?rios UFRN (Universidade Federal do Rio Grande do Norte) e Prof. Lauro Pires Xavier JPB (Universidade Federal da Para?ba). Foram registradas 15 esp?cies pertencentes a 12 g?neros. Os g?neros mais representativos foram Diodella Small. (3) e Chiococca P. Browne (2); e os demais, Alseis Schott, Borreria G. Mey., Cordiera A. Rich. Ex DC., Guettarda L., Margaritopsis C. Wright , Mitracarpus Zucc. ex Schult. & Schult. f., Psychotria L, Richardia L., Staelia Cham. & Schltdl. e Tocoyena Aubl., com uma esp?cie cada. Os principais caracteres utilizados para separar as esp?cies foram ? forma das est?pulas e os tipo e/ou posi??o das infloresc?ncias. Quanto ? distribui??o dos t?xons na ?rea de estudo, as esp?cies herb?ceas como Richardia grandiflora (Cham & Schltdl.) Steud, Diodella apicullata (Willd. ex Roem. & Schult.) Delprete, Spermacoce verticillata (L.) e Diodella sp, foram amplamente registradas nas ?reas de bordas onde existe intensa luminosidade, enquanto Mitracarpus hirtus (L) DC. e Spermacoce latifolia Aubl. se desenvolvem em ?reas mais sombreadas. J? Staelia aurea K. Schum. apresentou distribui??o mais restrita, conhecida de alguns indiv?duos em um ?nico local. Psychotria bahiensis DC. e Margaritopsis carrascoana (Delprete & E. B. Souza) C.M. Taylor & E. B. Souza, foram amplamente encontradas tanto no interior da floresta como nas bordas onde h? sombreamento. Alseis pickelii Pilg. & Schmale, ? um dos principais componentes arb?reos, contribuindo com a forma??o do dossel; j? os demais t?xons foram encontrados tanto nas bordas quanto no interior da mata. S?o apresentadas chaves para g?neros e esp?cies, descri??es morfol?gicas, ilustra??es, coment?rios sobre afinidades taxon?micas, distribui??o geogr?fica, dados fenol?gicos e ecol?gicos dos t?xons

Made available in DSpace on 2014-12-17T14:33:05Z (GMT). No. of bitstreams: 1 LuizVBM_DISSERT.pdf: 1648951 bytes, checksum: a7707da0afbbaf8f737a2bec45324476 (MD5) Previous issue date: 2011-07-08 / The habitat loss and fragmentation are considered the main threats to the biodiversity. These threats operate at the landscape level, which drives the need to manage entire landscapes, not just its components. Although systematic monitoring of the Atlantic Forest biome has been ongoing since the late eighties, current data on forest fragmentation for the sub-region of Pernambuco are practically nonexistent. This study aimed to map out, with high spatial resolution, the remnants of Atlantic forest in Rio Grande do Norte, and conduct a landscape level analysis. The results show that the landscape is highly fragmented, where about 13.6% to 17% of biome remains. Most of the fragments is less than 10 ha, while a few fragments have area larger than 100 ha. Although the high degree of fragmentation, the average distance between fragments found was small (128 m), this estimate is lower than has been observed for the biome (1440m). There is evidence that abrupt changes in the quantification of landscape structure can occur when one observes the fragmentation at high spatial resolution. The results presented here can be used in management actions, in order to make the scenario more conducive to maintaining biodiversity. / A perda e fragmenta??o de habitat s?o consideradas as principais amea?as a biodiversidade. Essas amea?as atuam ao n?vel da paisagem, o que impele a necessidade de manejar paisagens por inteiro e n?o somente suas componentes. Embora o acompanhamento sistem?tico do bioma Mata Atl?ntica venha sendo feito desde o final da d?cada de oitenta, dados atualizados sobre fragmenta??o florestal para a sub-regi?o de Pernambuco s?o praticamente inexistentes. O presente estudo teve como objetivo mapear, sobre imagens de alta resolu??o espacial, os remanescentes do bioma Mata Atl?ntica no estado do Rio Grande do Norte e conduzir uma an?lise ao n?vel de paisagem. Os resultados mostram que a paisagem encontra-se altamente fragmentada, onde restam cerca 13,6% a 17% dos remanescentes florestais do bioma. A grande maioria dos fragmentos ? menor do que 10 ha, enquanto poucos fragmentos possuem ?rea maior do que 100 ha. Embora seja elevado o grau de fragmenta??o, a dist?ncia m?dia entre fragmentos encontrada foi pequena (128 m), essa estimativa ? menor do que a que tem sido observada para o bioma (1440m). H? ind?cios de que mudan?as bruscas na quantifica??o da estrutura da paisagem podem ocorrer quando se observa a fragmenta??o em alta resolu??o espacial. Os resultados aqui apresentados podem ser utilizados em a??es de manejo, com vistas a tornar o cen?rio mais prop?cio ? manuten??o da biodiversidade.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-07-04T14:27:11Z No. of bitstreams: 1 HeloiseAndriellyNascimentoCosta_DISSERT.pdf: 1809358 bytes, checksum: a0116fb35021db655e6b0670cf1dfe83 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-07-14T12:44:57Z (GMT) No. of bitstreams: 1 HeloiseAndriellyNascimentoCosta_DISSERT.pdf: 1809358 bytes, checksum: a0116fb35021db655e6b0670cf1dfe83 (MD5) / Made available in DSpace on 2017-07-14T12:44:57Z (GMT). No. of bitstreams: 1 HeloiseAndriellyNascimentoCosta_DISSERT.pdf: 1809358 bytes, checksum: a0116fb35021db655e6b0670cf1dfe83 (MD5) Previous issue date: 2017-02-20 / A delimita??o das Florestas Estacionais deve ser realizada incluindo v?rios aspectos, como solo, relevo e vegeta??o. No Nordeste brasileiro, a Floresta Estacional Decidual ocorre em zona de contato entre a Caatinga, o Cerrado e a Mata Atl?ntica, sendo faixas estreitas e transicionais. No RN ocorre uma versatilidade florestal entre esses ecossistemas. A varia??o de altitude ? um fator importante de mudan?as de padr?es vegetacionais, no entanto pouco estudada em florestas nacionais e locais. O estudo foi realizado em uma ?rea de floresta decidual no munic?pio de Maca?ba. Esta foi dividida em 4 cotas, com diferen?a de 19 m de altitude entre elas. Foram coletados dados flor?sticos e fitossociol?gicos. Foi inventariado um total de 449 indiv?duos distribu?dos em 69 esp?cies, 49 g?neros e 36 fam?lias, sendo a fam?lia mais representativa a Fabaceae com 11 esp?cies e 164 indiv?duos, seguidas por Myrtaceae (10 esp?cies e 98 indiv?duos) e Malpighiaceae (4 esp?cies e 10 indiv?duos). As esp?cies Chamaecrista ensiformis (Vell.) H.S. Irwin & Barneby, Guapira laxa (Netto) Furlan e Zanthoxylum syncarpum Tul. obtiveram os maiores ?ndices Fr: 50, 45 e 50 e VI: 25,11%; 17,09% e 19,58% respectivamente. Nenhuma esp?cie ocorreu ao longo de todo gradiente, havendo uma entrada e sa?da de t?xons constante. Os valores da DCA foram de -0,851 e - 6,8794; os ?ndices de J?, 0,8432, (C) 0,9533 E H?3,532; C2 apresentou os melhores valores para todos os ?ndices analisados, evidenciando um excelente estagio de conserva??o e fitofisionomia relacionada ? Mata Atl?ntica; C1 e C4, apesar da dist?ncia, apresentam fitofisionomia da Caatinga e do Cerrado, enquanto C3 apresenta t?xons de ampla distribui??o entre os biomas nacionais. Assim, observa-se uma significante dissimilaridade na estrutura vegetacional de modo suave e cont?nuo. / The delimitation of Deciduous Forests should be done including several aspects, such as soil, relief and vegetation. In the Brazilian Northeast, the Decidual Seasonal forest occurs in a contact zone between the Caatinga, the Cerrado and the Atlantic Forest, being narrow and transitional bands. In the RN there is a forest versatility between these ecosystems. The altitude variation is an important factor of changes in vegetation patterns, however not deeply studied in national and local forests. The study was carried out in an area of deciduous forest in the county of Maca?ba, which was divided into 4 zones with a difference of 19 m of altitude between them, floristic and phytosociological data were collected. A total of 449 individuals distributed in 69 species, 49 genus and 36 families were inventoried. Fabaceae family was the most representative one with 11 species and 164 individuals, followed by Myrtaceae (10 species and 98 individuals) and Malpighiaceae (4 species and 10 indivisuals). Chamaecrista ensiformis (Vell.) H.S. Irwin & Barneby, Guapira laxa (Netto) Furlan e Zanthoxylum syncarpum Tul species obtained the higher indexes Fr: 50, 45 e 50 e VI: 25,11%; 17,09% e 19,58% , repectively. No species occurred along the entire gradient, with a constant input and output of taxa, DCA values was -0,851 e -6,8794, the indexes de of J?0,8432 , (C) 0,9533 E H?3,532; C2 presented the best values for all analyzed indexes evidencing an excellent stage of conservation and phytosanation related to the Atlantic Forest. Ci and C4 in spite of the distance they present Phytophysiognomy of Caatinga and Cerado; While C3 presents taxa of wide distribution among the national biomes. Thus a significant dissimilarity in the vegetative structure is observed in a smooth and continuous way.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-09-05T19:43:50Z No. of bitstreams: 1 MaryaneChristinaSilvaDamascenoFerreira_DISSERT.pdf: 1985945 bytes, checksum: 4b34af8968914e2c129f882e0b646c7d (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-09-15T21:12:45Z (GMT) No. of bitstreams: 1 MaryaneChristinaSilvaDamascenoFerreira_DISSERT.pdf: 1985945 bytes, checksum: 4b34af8968914e2c129f882e0b646c7d (MD5) / Made available in DSpace on 2017-09-15T21:12:45Z (GMT). No. of bitstreams: 1 MaryaneChristinaSilvaDamascenoFerreira_DISSERT.pdf: 1985945 bytes, checksum: 4b34af8968914e2c129f882e0b646c7d (MD5) Previous issue date: 2017-05-15 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / As esp?cies de primata brasileiros Callicebus barbarabrownae, Callicebus coimbrai e Sapajus xanthosternos est?o amea?adas de extin??o. Uma das causas desse cen?rio ? a fragmenta??o das ?reas de ocorr?ncia dessas esp?cies na Caatinga e Mata Atl?ntica. Nesse contexto, o presente estudo objetivou a) caracterizar os fragmentos com ocorr?ncia para cada uma das tr?s esp?cies; b) comparar os fragmentos da ?rea de ocupa??o com os demais fragmentos de sua extens?o de ocorr?ncia onde cada esp?cie est? inserida; c) compar?-los entre si quanto as caracter?sticas dos fragmentos, considerando as diferen?as inerentes a cada esp?cie e a cada bioma. Para identificar os fragmentos florestais da extens?o de ocorr?ncia de cada esp?cie e identificar os fragmentos com presen?a confirmada utilizou-se registros de ocorr?ncias das esp?cies obtidas atrav?s de levantamento bibliogr?fico e imagens de sat?lite de ?ndice de Vegeta??o da Diferen?a Normalizada (NDVI) disponibilizadas por Hansen et al (2013). Para caracterizar os fragmentos foram utilizadas v?rias m?tricas da paisagem de forma e isolamento. As tr?s esp?cies de primatas ocorreram usualmente em fragmentos pequenos, regulares e com bordas complexas. Entretanto, quando se comparou com as suas respectivas ?reas de extens?o de ocorr?ncia, as tr?s esp?cies estudadas usualmente ocorreram em fragmentos com maior ?rea, forma mais regular, bordas mais complexas e muito isolados, demonstrando que essas caracter?sticas do fragmento s?o importantes para a ocorr?ncia desses primatas. Para C. coimbrai o tamanho do fragmento vizinho mais pr?ximo mostrou-se mais importante que o isolamento. Seus fragmentos com ocorr?ncia tiveram maior ?ndice de proximidade que os fragmentos de sua extens?o de ocorr?ncia, o que infere em uma maior presen?a de fragmentos na matriz. Dentre as caracter?sticas analisadas dos fragmentos a forma (per?metro/?rea e complexidade da borda) foi a mais determinante na ocorr?ncia dessas tr?s esp?cies de primatas em ambientes fragmentados. Depois da forma, as vari?veis explicativas mais importantes foram ?rea e isolamento (para C. coimbrai). Ao comparar as tr?s esp?cies, observou-se que C. barbarabrownae habita fragmentos menores, mais regulares, com bordas menos complexas e mais isolados que as outras duas esp?cies, possivelmente por s? habitar um bioma com diferente hist?rico de ocupa??o e altera??o, a Caatinga, enquanto as outras duas esp?cies que ocorrem predominantemente ou somente na Mata Atl?ntica. C. coimbrai e S. xanthosternos apresentaram fragmentos com ocorr?ncia com caracter?sticas de forma e isolamento semelhantes, possivelmente por habitarem um mesmo bioma altamente fragmentado, embora tenham diferen?as tanto no uso como em requerimentos de recursos. Portanto, esses tr?s primatas requerem a cria??o de unidades de conserva??o que protejam fragmentos que tenham as caracter?sticas de forma, ?rea e isolamento que determinam suas presen?as e a cria??o de corredores ecol?gicos para aumentar a conectividade entre os fragmentos, visto o grande isolamento dos fragmentos de suas respectivas ?reas de ocupa??o. / The species of Brazilian primates Callicebus barbarabrownae, Callicebus coimbrai and Sapajus xanthosternos are at risk of extinction. One of the causes of this scenario is the fragmentation of the areas of occurrence of these species in the Caatinga and Mata Atl?ntica. In this context, the present study has as objective a) characterize the fragments with occurrence to each one of these three species; b) compare the fragments of the area of occupation with the other of its extension of occurrence where each specie is covered; c) compare the three species about the characteristics of the fragments, taking the inherent differences to each specie and each biome. To identify the forest fragments of the extension of occurrence of each species and identify the fragments with confirmed presence it was utilized records of occurrence of the species and images of satellite of the Normalized Difference Vegetation Index (NDVI) shared by Hansen at al (2013). To characterize the fragments were utilized several metrics of the landscape, of form and of isolation. These three species of primates usually occurred in small, regular and with complex borders fragments. However, when it was compared with their respective extension of occurrence areas, the three studied species usually occurred in fragments with bigger area, more regular form and more complex and too isolated borders, demonstrating that these primates do not occur by coincidence. To C. coimbrai the size of the nearest neighboring fragment showed as more important than isolation. Their fragments with occurrence have bigger rate of proximity than the fragments of extension of occurrence, what infer in a bigger presence of fragments in the matrix. Among the analyzed characteristics of the fragments, the form (perimeter/area and complexity of the border) was the most determined in the occurrence of these three species of primates in fragmented environments. After the form, the most important explanatory variables were area and isolation (to C. coimbrai). When the there species were compared, it was observed that C. barbarabrownae had inhabited smaller and more regular areas, with less complex borders and more isolated than other two species, possibly because of its inhabitation in Caatinga, when the other two species predominately or just occurred in Mata Atl?ntica. C. coimbrai and S. xanthosternos showed fragments with similar occurrence about their characteristics of form and isolation, possibly because they have inhabited the same over-fragmented habitat despite that they have differences not only in the use, as in the requirement of resources. Thus, these three primates require require the creation of unites of conservation that protect fragments that has the characteristics of form, area and isolation that determine their presences and the creation of ecological corridors to increase the connectivity among the fragments, that has seen the large isolation of the fragments in their respective areas of occupation.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-10-04T19:47:29Z No. of bitstreams: 1 AlineCristineTavares_DISSERT.pdf: 5980937 bytes, checksum: daf398f9ace99aeccba1a757dc2c694d (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-10-10T22:51:12Z (GMT) No. of bitstreams: 1 AlineCristineTavares_DISSERT.pdf: 5980937 bytes, checksum: daf398f9ace99aeccba1a757dc2c694d (MD5) / Made available in DSpace on 2017-10-10T22:51:12Z (GMT). No. of bitstreams: 1 AlineCristineTavares_DISSERT.pdf: 5980937 bytes, checksum: daf398f9ace99aeccba1a757dc2c694d (MD5) Previous issue date: 2017-07-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Margens continentais transformantes s?o caracterizadas pela presen?a de falhas transformantes/zonas de fratura de grande rejeito transcorrente, que foram investigadas escassamente quando comparadas ?s margens divergentes e convergentes. Essas falhas influenciaram a segmenta??o e evolu??o das margens transformantes. Este estudo investiga a evolu??o da Zona de Fratura de Romanche (RFZ) na margem equatorial do Brasil, utilizando dados gravim?tricos, magn?ticos, batim?tricos e de s?smica de reflex?o. Os resultados da presente investiga??o indicam que a RFZ ? uma zona de dire??o E-W com ~70 km de largura, marcada por cadeias de at? 2,5 km acima da topografia circundante. As anomalias magn?ticas que marcam a crosta oce?nica mais antiga est?o em um ?ngulo de 26? e 30? no sentido hor?rio a sul e a norte da zona de fratura, respectivamente, indicando que os primeiros centros de espalhamento foram obl?quos ? zona de fratura. As anomalias rotacionaram no sentido hor?rio e passaram de obl?quas para ortogonais em rela??o ? transformante na is?crona 34 (83,5 ? 8 My). Esta rota??o indica que a influ?ncia do limite das crostas continental e oce?nica ? menos pronunciada ? medida que as anomalias tornam-se mais jovens e mais distantes do continente. A RFZ comportou-se como uma barreira topogr?fica, que impediu que parte dos sedimentos do continente e plataforma atingissem a parte norte da cadeia. Falhas normais formam a borda da plataforma continental e as bordas de cadeias e montes submarinos e atingem as camadas mais recentes, indicando que h? reativa??o neotect?nica. A orienta??o e a geometria da RFZ moldaram a geometria atual da margem brasileira, caracterizada por setores de dire??o E-W e NW-SE, e moldaram a evolu??o das bacias Par?-Maranh?o, Cear? e, principalmente, Barreirinhas. / Large-offset transform faults/fracture zones characterize transform continental margins, which have been seldom investigated when compared to divergent and convergent margins. These faults influenced the segmentation and evolution of the transform margins. This study investigates the evolution of the Romanche Fracture Zone (RFZ) in the Equatorial margin of Brazil using bathymetric, magnetic, gravity, and reflection seismic data. The results of the present investigation indicate that the RFZ is an E-Wtrending, ~70-km-wide zone marked by ridges 2.5 km above the surrounding topography. Magnetic anomalies that mark the oldest oceanic crust are at an angle of 26? and 30? clockwise south and north of the fracture zone, respectively, indicate that the first spreading centers were oblique to the main fracture zone. The anomalies rotated clockwise and shift from oblique to orthogonal to the transform at isochron 34 (83.5 ? 8 My). This rotation indicates that the influence of the continental-oceanic crust boundary is less pronounced as the anomalies become younger and a farther away from the continent. The RFZ behaved as topographic barrier, which prevented part of the sediments from the continent and shelf from reaching the northern part of the ridge. Normal faults form the border of the continental shelf and the borders of ridges and seamounts and they reach the upper younger layers, indicating that neotectonic reactivation. The orientation and geometry of the RFZ shaped the present-day geometry of the Brazilian margin, characterized by E-W- and NW-SE-trending sectors, and the evolution of the Par?-Maranh?o, Cear?, and mainly the Barreirinhas basin.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-10-04T19:45:16Z No. of bitstreams: 1 JulianaAparecidaGoncalvesLopes_DISSERT.pdf: 6908423 bytes, checksum: adf870a414cc76ebcff90a78b5a86557 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-10-10T23:17:13Z (GMT) No. of bitstreams: 1 JulianaAparecidaGoncalvesLopes_DISSERT.pdf: 6908423 bytes, checksum: adf870a414cc76ebcff90a78b5a86557 (MD5) / Made available in DSpace on 2017-10-10T23:17:13Z (GMT). No. of bitstreams: 1 JulianaAparecidaGoncalvesLopes_DISSERT.pdf: 6908423 bytes, checksum: adf870a414cc76ebcff90a78b5a86557 (MD5) Previous issue date: 2017-08-01 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / A an?lise quantitativa da subsid?ncia tect?nica contribui para identifica??o dos mecanismos que formam as bacias sedimentares, uma vez que a configura??o tect?nica desempenha uma fun??o principal na evolu??o destas bacias. A Bacia Potiguar, localizada na Margem Equatorial Brasileira, apresenta sua evolu??o relacionada a processos de rifteamento complexos, implementados durante a abertura do Oceano Atl?ntico no Jur?ssico/Cret?ceo. Esses processos foram respons?veis pelo desenvolvimento de um rifte emerso abortado, e um rifte submerso, que evoluiu at? a ruptura crustal e forma??o da margem continental transformante. N?s aplicamos a t?cnica de backstripping para quantificar a subsid?ncia tect?nica durante as fases rifte e p?s-rifte da Bacia Potiguar, e analisar a varia??o espacial da subsid?ncia durante os dois eventos tect?nicos, sucessivos e distintos, respons?veis pela evolu??o da bacia. Os par?metros necess?rios para aplica??o desta metodologia foram obtidos por meio de linhas s?smicas 2D e dados de po?os explorat?rios. As curvas de subsid?ncia tect?nica apresentam per?odos com taxas de subsid?ncia moderadas (at? 300 m/Ma), que correspondem a evolu??o do Rifte Potiguar emerso (~141 a 128 Ma). A partir de 128 at? 118 Ma, as curvas apresentam taxas de subsid?ncia nulas para o rifte emerso, enquanto que, altas taxas de subsid?ncia tect?nica (acima de 300 m/Ma) foram registradas no rifte submerso. Durante a fase p?s-rifte, que ocorre a partir de 118 Ma, as taxas de subsid?ncia tect?nica diminu?ram exponencialmente para valores menores que 35 m/Ma, provavelmente relacionadas ? subsid?ncia termal. As taxas de subsid?ncia tect?nica nos v?rios setores do Rifte Potiguar durante as diferentes fases de rifteamento indicam falhamentos mais intensos na parte sul da falha de Carnaubais, ao longo das principais falhas de borda, e na regi?o sudeste do rifte submerso. Durante a fase p?s-rifte, as taxas de subsid?ncia tect?nica aumentam da por??o emersa para a submersa at? a regi?o da quebra da plataforma. As taxas mais altas de subsid?ncia do p?s-rifte (at? 35 m/Ma) est?o concentradas na regi?o central da por??o submersa, e podem estar relacionadas a processos litosf?ricos relacionados ? ruptura da crosta continental e espalhamento oce?nico. A varia??o nas taxas de subsid?ncia e no padr?o das curvas de subsid?ncia nos permitiu interpretar a assinatura tect?nica registrada pelas sequ?ncias sedimentares da Bacia Potiguar durante sua evolu??o. No rifte emerso, as curvas apresentaram taxas de subsid?ncia de at? 300m/Ma durante uma longa fase de rifteamento (13 Ma), o que confirmou o desempenho de um regime distensional nesta por??o. No rifte submerso, as curvas apresentaram taxas de subsid?ncia acima de 300 m/Ma em um intervalo de tempo mais curto (5 a 10 Ma), t?picas de bacias formadas por um regime transtensional. / The quantitative analysis of the tectonic subsidence sheds light on basin-forming mechanisms, since tectonic plate motions play the main role in the genesis of sedimentary basins. The Potiguar Basin, located in the Brazilian Equatorial Margin, presents an evolution related to a complex rifting process, implemented during the Atlantic Ocean opening in the Jurassic/Cretaceous. Different driving mechanisms were responsible for the onset of an aborted onshore rift and an offshore rift, which evolved to crustal rupture and formation of a continental transform margin. Therefore, we applied the backstripping method to quantify the tectonic subsidence during the rift and post-rift phases of the Potiguar Basin and to analyze the spatial variation of subsidence during the two successive and distinct tectonic events responsible for the basin evolution. The parameters required to apply this methodology were extracted from 2D seismic lines and exploratory well data. The tectonic subsidence curves present periods with moderate subsidence rates (up to 300 m/My), which correspond to the evolution of the onshore Potiguar Rift (~141 to 128 Ma). From 128 to 118 Ma, the curves show null subsidence rates in the onshore Potiguar Basin, whereas high subsidence rates (over 300 m/My) occurred in the offshore rift. The post-rift phase had begun at ca. 118 Ma (Aptian), when the tectonic subsidence drastically slowed down to less than 35 m/My, probably related to thermal subsidence. The tectonic subsidence rates in the various sectors of the Potiguar Rift during the different rift phases indicate more intense faulting in the southern portion of the onshore rift, along the main border faults, and in the southeastern portion of the offshore rift. During the post-rift phase, the tectonic subsidence rates increased from onshore to the offshore portion until the continental slope. The highest rates of post-rift subsidence (up to 35 m/My) are concentrated in the central region of the offshore portion, and may be related to lithospheric processes related to the continental crust rupture and oceanic seafloor spreading. The variation in subsidence rates and the pattern of subsidence curves allowed us to interpret the tectonic signature recorded by the sedimentary sequences of the Potiguar Basin during its evolution. In the onshore rift, the curves presented subsidence rates up to 300 m/My during a long-term rift phase (13 Ma), which confirmed an extensional regime in this portion. In the offshore rift, the curves presented high subsidence rates over 300 m/My in a shorter period (5 to10 My), typical of basins formed in a transtensional regime.

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2017-06-29T18:21:50Z No. of bitstreams: 1 2005 - ?lvaro Freire da Motta.pdf: 4216645 bytes, checksum: 8b71082db76942e3cb61ca73c1dc6c87 (MD5) / Made available in DSpace on 2017-06-29T18:21:50Z (GMT). No. of bitstreams: 1 2005 - ?lvaro Freire da Motta.pdf: 4216645 bytes, checksum: 8b71082db76942e3cb61ca73c1dc6c87 (MD5) Previous issue date: 2005-08-12 / The present work makes an analysis of the forest and environmental legislation with focus in the Atlantic forest, and it evaluates the effects of that legislation in the maintenance of a remaining space of that bioma. The objectives of the work were: a) to survey and to discuss the legislation with focus in the Atlantic forest; b) to analyze the forest covering evolution and land use occurred among 1984-99 of a Atlantic forest remaining fragment in the state of Rio de Janeiro; c) to evaluate the effects of the forest and environmental legislation in fragment maintenance. A forest and environmental legislation survey was accomplished in the Commission of Defense of the environment of the Legislative Assembly of the State of Rio de Janeiro (ALERJ), through the environmental legislation program ISIGLA2000, besides search in ALERJ library and in legislation research internet sites; it was carried out a Atlantic forest remaining fragment mapping, using base maps supplied by the Division of Environmental Information of the Clerkship of environment of the City of Rio de Janeiro (SMAC) and from the Instituto Pereira Passos (IPP), were generated maps in the scale of 1:40.000 and information of forest covering and land use, in seven thematic classes, for five moments, in a 15 year-old period; finally, the pertinent legislation was confronted to the study area with the data resultants of the mapping classes. This analysis revealed that before the Forest Code of 1934 there was a concern with the forest conservation, even so in character strictly commercial; in the period between the codes: 1934-65 the published legal acts are linked fundamentally to the Forest Code, highlighting the creation of the Protecting Forests; starting from the New Forest Code the legislation is revealed liberal and consistent; pos-constitution of 1988 can stand out the alterations introduced in the Forest Code, the creation of IBAMA and the specific regulation of the use of the Atlantic forest. The analysis of the thematic mapping revealed a relative loss of forest in the studied area of 28% (2.337,1 ha), in 15 years, and a relative increment of 857% of the urbanization (5,1 ha). Confronting legislation with the mapping it reveals that previously to 1984 several legal acts had already been published; the legislation appeared in the period of 1984- 88 was unable to contain a loss of the forest covering of 505,6 ha; among 1988-92 the loss of the forest covering was of 99,1 ha; among 1992-96 the loss of the forests was worsened (838,9 ha), nevertheless the published legal acts; the same happened among 1996-99 (893,6 ha), being explained partly by a public distrust of the efficiency of the legislation. The main conclusions were: in the elapsed country history, six were the marked legal acts: the Forest Code (1934), the effective Forest Code (1965), the Law of the National Politics of the environment (1981), the Constitution of 1988, the Law of Environmental Crimes (1998) and the Law of the National System of Conservation of the Nature; it was effective the inclusion of the Atlantic forest as National Patrimony, in the Constitution of 1988; the studied Atlantic forest remaining fragment revealed a relative loss of 28% of the forest covering among 1984-99, and an extraordinary growth of 857% and 256% of urban and urban areas consolidated, respectively; the expressive number of legal acts published in the period 1984-99 was insufficient to maintain the forest covering in the studied Atlantic forest remaining fragment. / O presente trabalho faz uma an?lise da legisla??o florestal e ambiental com enfoque na Mata Atl?ntica, e avalia os efeitos dessa legisla??o na manuten??o de um trecho remanescente desse bioma. Os objetivos do trabalho foram: a) levantar e discutir a legisla??o com enfoque na Mata Atl?ntica; b) analisar a evolu??o da cobertura florestal e uso da terra ocorrida entre 1984-99 em um trecho remanescente da Mata Atl?ntica no estado do Rio de Janeiro; c) avaliar os efeitos da legisla??o florestal e ambiental na manuten??o desse trecho. Foi realizado um levantamento da legisla??o florestal e ambiental na Comiss?o de Defesa do Meio Ambiente da Assembl?ia Legislativa do Estado do Rio de Janeiro (ALERJ), atrav?s do programa ISIGLA2000 de legisla??o ambiental, al?m de busca na biblioteca da ALERJ e em sites de pesquisa de legisla??o; procedeu-se ao mapeamento de um trecho remanescente da Mata Atl?ntica do estado, tomando-se como base mapas fornecidos pela Divis?o de Informa??es Ambientais da Secretaria de Meio Ambiente da Cidade do Rio de Janeiro (SMAC) e pelo Instituto Pereira Passos (IPP), gerando-se mapas na escala de 1:150.000 e informa??es de cobertura florestal e uso da terra, em sete classes tem?ticas, para cinco momentos, num per?odo de 15 anos; finalmente, confrontou-se a legisla??o pertinente ? ?rea de estudo com os dados resultantes das classes de mapeamento. Esta an?lise revelou que antes do C?digo Florestal de 1934 havia uma preocupa??o com a conserva??o florestal, por?m em car?ter estritamente comercial; no per?odo interc?digos: 1934-65 os atos legais editados vinculam-se fundamentalmente ao C?digo Florestal, destacando a cria??o das Florestas Protetoras; a partir do Novo C?digo Florestal a legisla??o revela-se mais pr?diga e consistente; p?s-constitui??o de 1988 pode-se destacar as altera??es introduzidas no C?digo Florestal, a cria??o do IBAMA e a regulamenta??o espec?fica do uso da Mata Atl?ntica. Na an?lise dos mapeamentos tem?ticos revelou uma perda relativa de floresta na ?rea estudada de 28% (2.337,1ha), em 15 anos, e um acr?scimo relativo de 857% da urbaniza??o (5,1ha). O confronto da legisla??o com o mapeamento revelou que anteriormente a 1984 v?rios atos legais j? haviam sido editados; a legisla??o surgida no per?odo de 1984-88 foi incapaz de conter uma perda da cobertura florestal de 505,6ha; entre 1988- 92 a perda da cobertura florestal foi de 99,1ha; entre 1992-96 a perda das florestas foi agravada (838,9ha), n?o obstante os atos legais editados; o mesmo ocorreu entre 1996-99 (893,6ha), sendo explicado em parte por uma desconfian?a p?blica da efici?ncia da legisla??o. As principais conclus?es foram: no decorrer da hist?ria do pa?s, seis foram os atos legais marcantes: o C?digo Florestal (1934), o C?digo Florestal vigente (1965), a Lei da Pol?tica Nacional do Meio Ambiente (1981), a Constitui??o de 1988, a Lei de Crimes Ambientais (1998) e a Lei do Sistema Nacional de Unidades de Conserva??o ? SNUC (2000); foi tamb?m marcante a inclus?o da Mata Atl?ntica como Patrim?nio Nacional, na Constitui??o de 1988; o trecho remanescente da Mata Atl?ntica estudado revelou uma perda relativa de 28% da cobertura florestal entre 1984-99, e um extraordin?rio crescimento de 857% e 256% das ?reas urbana e urbana n?o consolidada, respectivamente; o expressivo n?mero de atos legais editados no per?odo 1984-99 revelou-se insuficiente para manter a cobertura florestal no trecho remanescente da Mata Atl?ntica estudado.