Submitted by Renata Lopes (renatasil82@gmail.com) on 2016-04-18T14:35:25Z No. of bitstreams: 1 gabrielamontessideoliveiraamaral.pdf: 1756455 bytes, checksum: a599c0846febf87b1be49e2eb2f26c16 (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2016-04-24T03:11:25Z (GMT) No. of bitstreams: 1 gabrielamontessideoliveiraamaral.pdf: 1756455 bytes, checksum: a599c0846febf87b1be49e2eb2f26c16 (MD5) / Made available in DSpace on 2016-04-24T03:11:25Z (GMT). No. of bitstreams: 1 gabrielamontessideoliveiraamaral.pdf: 1756455 bytes, checksum: a599c0846febf87b1be49e2eb2f26c16 (MD5) Previous issue date: 2015-12-02 / CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico / O setor de florestas plantadas vem ganhando cada vez mais espaço na economia brasileira e já representa 5,5% de todo o PIB industrial nacional. Os fatores que tem garantido o destaque dos reflorestamentos brasileiros são as vantagens proporcionadas por suas condições edafoclimáticas, propícias ao plantio de espécies exóticas como o eucalipto e o pinus e, principalmente, os elevados investimentos em pesquisa e tecnologia que tem assegurado elevadas produtividades. Dentre os estados da federação que possuem as maiores áreas de florestas plantadas, Minas Gerais se encontra na primeira posição. A importância do estado no setor sempre esteve atrelado à siderurgia, principal segmento industrial mineiro, que utiliza o carvão vegetal, combustível obtido através da carbonização da madeira, para movimentar seus fornos. Assim, algumas regiões mineiras se especializaram na produção de florestas energéticas para suprir a demanda por esse insumo das siderúrgicas, dentre elas, a microrregião de Curvelo. Nesse sentido, ocorre uma divisão territorial do trabalho em que a microrregião participa de um “momento” da produção ou fase produtiva de uma cadeia superior que se articula com outros subespaços para ser realizada. No que tange à operacionalização da pesquisa, os aspectos teóricos-metodológicos se baseiam predominantemente na categoria norteadora deste trabalho: o conceito de região, e na investigação da organização dos agentes, a montante e a jusante, que participam do processo produtivo florestal, buscando abordá-los de forma articulada. Por fim, objetivo deste trabalho é analisar a dinâmica regional da produção florestal na microrregião de Curvelo, considerando que dentre os elementos definidores da região na contemporaneidade destacamos a coerência funcional e sua capacidade de rentabilizar investimentos. / The sector of planted forest have been gaining ground in Brazilian economy and already represents 5,5% of industrial GPD. Even though, in face of its territorial extension, Brazil still presents a planting area that is considered far lower than its potential, holding the seventh position on the world stage. Some factors have ensured the highlight of Brazilian reforestation, such as the advantages provided by its climate and soil conditions, favorable to the planting of exotic species like eucalyptus and pine, and, essentially, research and technology high investments that assures elevated productivity. Among the states that own the highest areas of planted forest, Minas Gerais holds the first position. The importance of this state in the sector has always been related to ferrous metallurgy, the main industrial segment of Minas Gerais, which uses charcoal obtained from wood carbonization to stoke up its furnaces. Thus, some regions of this state have specialized in the production of forests in order to supply the demand of this ferrous metallurgy input, such as the microregion of Curvelo. Therefore, there is a territorial division of the work in which the microregion takes place of a “moment” in production or productive stage of a superior chain which articulates with other subspaces in order to be accomplished. The objective of this work is to analyze the regional dynamics of forestry production in microregion of Curvelo, considering that, among the defining elements of the region in contemporaneity, functional coherence and its capacity to monetize investments are highlighted.

Orientador: Dirceu da Silva / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Educação / Made available in DSpace on 2018-08-24T04:25:13Z (GMT). No. of bitstreams: 1 Silva_MarianadaRochaCorrea_D.pdf: 5613028 bytes, checksum: fd1a6a6b2f02edd2819a15dc288284ab (MD5) Previous issue date: 2013 / Resumo: Este trabalho descreve uma pesquisa quantitativa e qualitativa que investiga a percepção de alunos sobre possíveis influências de "Conjunções de Comunidades Virtuais de Prática" sobre seu processo de formação e sua prática. Essas conjunções visam o compartilhamento de conhecimento, o suporte à prática e a interação entre os membros de comunidades virtuais de prática. O levantamento bibliográfico sobre as características e aspectos do funcionamento de comunidades virtuais de prática e constelações de comunidades de prática possibilitou o desenvolvimento de uma metodologia voltada ao estabelecimento de Conjunções de Comunidades Virtuais de Prática e a elaboração de um instrumento que foi aplicado com os alunos do Curso de Especialização em Gestão Pública e Sociedade, um curso semipresencial que utilizou o ambiente TelEduc como suporte às aulas presenciais. Os dados obtidos foram submetidos à Análise Fatorial Confirmatória (Modelagem de Equações Estruturais), possibilitando a criação de um modelo que mostra como as variáveis ou indicadores se compõem e a correlação entre eles. Com isso, foi possível perceber uma forte relação entre os constructos ASP PEDAGÓGICOS e ASP TECNOLÓGICOS que se relacionaram para possibilitar o desenvolvimento do constructo ASP SOCIAIS no curso, cujas características são essenciais para o estabelecimento de Conjunções de Comunidades Virtuais de Prática, ou seja, a metodologia desenvolvida para o curso se baseou fortemente no aparato tecnológico disponível (ferramentas do TelEduc), além das restrições e implicações impostas pelo tipo de curso (curso de pós-graduação), para tentar criar um ambiente favorável ao desenvolvimento e manutenção de Comunidades Virtuais de Prática e para o posterior estabelecimento de Conjunções de Comunidades Virtuais de Prática na etapa do TCC (colaboração e interação). Isso pôde ser confirmado a partir da Análise Fatorial Confirmatória realizada, uma vez que os valores dos coeficientes de caminho indicaram que há uma forte relação entre os constructos ASP PEDAGÓGICOS e ASP TECNÓLOGICOS (0,902) e moderadas para os as outras duas relações causais (ASP TECNÓLOGICOS e ASP SOCIAIS = 0,417 e ASP PEDAGÓGICOS e ASP SOCIAIS = 0,504). / Abstract: This paper describes a quantitative and qualitative research investigating the perception of students about possible influences of "Conjunctions of Virtual Communities of Practice" on their formation process and their practice. These conjunctions are aimed at sharing knowledge, practical support and interaction among members of virtual communities of practice. The literature on the features and aspects of the functioning of virtual communities of practice and constellations of communities of practice enabled the development of a methodology aimed at the establishment of Conjunctions of Virtual Communities of Practice and the development of an instrument that was applied to the students of Specialization in Public Administration and Society, a course that used blended environment TelEduc as supporting classroom. The data obtained were subjected to Confirmatory Factor Analysis (Structural Equation Modeling), enabling the creation of a model that shows how the variables or indicators are composed and the correlation between them. Thus, it was possible to see a strong relationship between the constructs ASP and ASP TECHNOLOGICAL EDUCATIONAL that related to possible deployment of ASP SOCIAL construct in the course, whose characteristics are essential for the establishment of Conjunctions of Virtual Communities of Practice, i.e. the methodology developed for the course relied heavily on technological apparatus available (TelEduc tools), as well as the constraints and implications imposed by the type of course (graduate course), to try to create an environment conducive to the development and maintenance of Virtual Communities of Practice and the subsequent establishment of Conjunctions of Virtual Communities of Practice in TCC phase (collaboration and interaction). This could be confirmed from the conducted Confirmatory Factor Analysis, since the values of the path coefficients indicate that there is a strong relationship between the constructs ASP and ASP TECHNOLOGICAL EDUCATIONAL (0.902) and moderate for the other two causal relationships (ASP TECHNOLOGICAL SOCIAL = 0.417 and ASP and ASP and ASP SOCIAL TEACHING = 0.504). / Doutorado / Ensino e Práticas Culturais / Doutora em Educação

Le genre Eupelmus Dalman (Chalcidoidea: Eupelmidae: Eupelminae) comprend des ecto-parasitoïdes s'attaquant essentiellement aux stades larvaires et nymphaux de divers insectes holométaboles. Jusqu'à présent, la systématique du genre Eupelmus restait mal résolue compte tenu des données limitées et restreintes à la morphologie et de l'absence de révisions taxonomiques récentes, fiables et globales. Dans ce contexte, de nombreuses questions se posent concernant (i) la pertinence de la classification infra-générique actuelle du genre Eupelmus; (ii) la validité du statut taxonomique des certaines espèces décrites; (iii) la fiabilité des informations écologiques telles que la gamme d'hôtes et la distribution géographique et, donc, (iv) la compréhension des processus de spécialisation écologique et du rôle potentiel de certaines espèces d'Eupelmus comme auxiliaires de lutte biologique. Ce travail de thèse a donc eu pour objectif d'aborder l'ensemble de ces questions en utilisant, à des fins de phylogénie et de taxonomie, une approche intégrative combinant des données moléculaires (ADN mitochondrial et nucléaire) et morphologiques.Les résultats obtenus concernant les relations phylogénétiques infra-générique montrent que la structuration supposée du genre Eupelmus en trois sous-genres (Eupelmus, Episolindelia et Macroneura), ne peut pas être retenue et que ce genre se structurerait plutôt, à l'échelle géographique retenue, en une douzaine de groupes d'espèces. De plus, l'étude de la taxonomie de deux complexes (ensemble d'espèces morphologiquement proches), les complexes “urozonus” et “vesicularis”, met globalement en évidence une diversité insoupçonnée dans la zone Euro-méditerranéenne et plus d'une dizaine d'espèces ont été découvertes et décrites comme de nouvelles espèces à l'occasion de ces travaux. D'une façon générale, les caractères morphologiques, les marqueurs nucléaires et les marqueurs mitochondriaux se sont révélés relativement concordants sauf au sein du complexe vesicularis qui présente une divergence plus marquée au niveau d'ADN mitochondrial.Dans le cadre particulier du groupe urozonus, ce travail de thèse nous a également permis d'étudier l'évolution de la spécificité d'hôtes en lien avec une phylogénie moléculaire multi-locus relativement bien résolue et une estimation de la longueur d'ovipositeur, un caractère morphologique susceptible d'expliquer l'accès aux hôtes. D'une façon générale, les analyses comparatives révèlent que la spécificité d'hôtes n'est pas contrainte par la phylogénie. Nous observons ainsi des spectres d'hôtes très contrastés entre des espèces phylogénétiquement très proches. De même, la longueur d'ovipositeur, qui semble un caractère très labile à cette échelle, ne semble pas déterminer le spectre d'hôtes. L'ensemble des résultats obtenus ont finalement été utilisées de façon à mieux comprendre le rôle potentiel de certaines espèces d'Eupelmus sur des insectes ravageurs, la mouche de l'olive Bactrocera oleae et le cynips du châtaignier Dryocosmus kuriphilus. / The genus Eupelmus Dalman (Chalcidoidea: Eupelmidae: Eupelminae) includes ecto-parasitoids attacking mostly nymphal and larval stages of various holometabolous insects. So far, the systematics of the Eupelmus genus remained poorly resolved due to limited data restricted to morphological information and the absence of recent, reliable and comprehensive taxonomic revisions. In this context, many questions arise concerning (i) the relevance of the current sub-generic classification of the Eupelmus genus; (ii) the availability of the taxonomic status of some species described; (iii) the reliability of ecologic information such as the host range and the geographical distribution; and therefore, (iv) the understanding of the ecological specialization's processes and the potential role of certain species of Eupelmus as auxiliaries of biological control. This thesis work has therefore aimed to address all of these questions by using, for the purposes of phylogeny and taxonomy, an integrative approach combining molecular (nuclear and mitochondrial DNA) and morphological data.The results obtained concerning the sub-generic phylogenetic relationships show that the supposed structuration of Eupelmus genus into three subgenera (Eupelmus, Episolindelia and Macroneura), can not be retained and that this genus would be rather structured, at the retained geographical scale, in a dozen of species groups. In addition, the study of taxonomy of two complexes (sets of morphologically similar species), the complex “urozonus” and “vesicularis”, overall highlights unsuspected diversity in the Euro-Mediterranean area and more than ten species have been discovered and described as new species on the occasion of this work. Generally, the morphological characteristics, nuclear markers and mitochondrial markers have been relatively consistent except within the vesicularis complex which exhibits more marked divergence in the mitochondrial DNA.In the particular case of the urozonus species group, this thesis work has also allowed us to study the evolution of the host specificity in relation to a relatively well-resolved multi-locus molecular phylogeny and an estimate of the length of ovipositor, a morphological character that could explain the ability to parasitize protected hosts. In general, the comparative analyses show that the host specificity is not constrained by the phylogeny. We indeed observe highly contrasted hosts ranges between closely phylogenetically related species. Similarly, the length of ovipositor, which seems a very labile character at this scale, does not seem to determine the host range. All the results obtained have finally been used to better understand the potential role of some Eupelmus species on two insect pests, the fruit olive fly Bactrocera oleae and the chestnut gall wasp Dryocosmus kuriphilus.

Knowledge management is one of frequently discussed disciplines. Knowledge in business area became the main competitive advantage in the last years and therefore it is necessary to manage knowledge effectively. This paper is focused on analysis of a system for managing knowledge used in a big software company and on suggestion of possible modifications of chosen parts of this system, which is the overall goal of this paper. Concrete goals are defined within the analytical part of this paper.

Sammanfattning Syftet med studien är att undersöka om tidig specialisering är en förutsättning för att uppnå elitnivå inom de estetiska idrotterna konståkning och truppgymnastik samt försöka få en förståelse för vilka för- och nackdelar tidig specialisering kan tänkas få för individen och den framtida elitkarriären. Följande frågeställningar skall besvaras i studien: Hur ser idrottsbakgrunden ut för samtliga landslagsutövarna inom konståkning och truppgymnastik? Hur beskriver landslagsutövarna sin idrottskarriär, inklusive eventuell specialisering och diversifiering? Metod En deduktiv enkät med totalt 7 frågor skickades ut till de 34 landslagsutövarna för att få en överblick över/kring hur deras idrottsbakgrund såg ut. 29 stycken valde att svara varav 14 var kvinnor och 15 var män, 10 konståkare och 18 truppgymnaster. Därefter kunde intervjupersonerna väljas utifrån de svar de angivit och som ansågs relevanta för studien, 2 från varje sport, 2 män och 2 kvinnor, med olika bakgrund inom sporterna. En semistrukturerad intervjuguide skapades för att samla så mycket information från deltagarna som möjligt. Efter transkribering togs citat ut och en induktiv metod användes för att skapa en modell med de svar som angivits av atleterna. Resultat Studien visade att det var stor spridning inom de båda landslagen gällande när atleterna börjat, specialiserat sig, utövat olika idrotter och dylikt. De fyra intervjupersonerna hade en mängd likheter och olikheter i deras väg till landslaget. Det skiljer sig i när de började utöva sporterna, några hade mest lek i träningen och andra tränade med målet att bli bättre redan första året. Kvinnorna hade fler skador än männen, endast en av de fyra atleterna hade slutat och tagit en paus i sin karriär. Stöttningen hemifrån och lagamraterna/kompisarna hade också olika stor inverkan på de fyra intervjupersonerna. Slutsats Tidig specialisering framkommer inte som ett måste för att nå det svenska landslaget i konståkning och truppgymnastik.

La spécialisation des parasites vis-à-vis de leur(s) hôte(s) et la formation de races d'hôtes sont des processus évolutifs clés dans le maintien et l'émergence de la diversité au sein des populations de parasites. Notre objectif était d'étudier ces processus chez Ixodes uriae, une tique d'oiseaux marins présentant une vaste distribution géographique et une large diversité d'hôtes, afin de mieux comprendre le rôle relatif des contraintes liées à l'hôte et aux facteurs géographiques dans l'évolution et la diversification de ce parasite. Cette question a été abordée à travers différentes approches réunissant des analyses de génétique des populations et de phylogéographie, des analyses morphologiques et une approche expérimentale sur le terrain. Les résultats obtenus montrent que le facteur spatial joue un rôle important dans la diversification d'I. uriae puisque quatre grands groupes géographiques génétiquement isolés ont été identifiés. L'évolution de races d'hôtes est également un processus récurrent de l'évolution d'I. uriae, même si la divergence entre races est plus ou moins marquée d'une région à l'autre. L'évolution des races semble impliquer une préférence d'hôte chez la tique ainsi que des contraintes adaptatives liées à l'hôte, de type mécanique ou physiologique (e.g., bec des oiseaux, digestion du sang, réponse immunitaire). L'ensemble des résultats est cohérent avec la notion d'évolution en mosaïque géographique qui prédit que les interactions entre espèces peuvent évoluer de manière différente dans un contexte spatial hétérogène ; ce qui souligne l'importance des caractéristiques écologiques des hôtes dans la diversification de la tique I. uriae. D'après nos résultats et ceux de différents collègues, la spécialisation d'hôte pourrait s'avérer être un processus commun chez les tiques et donc avoir de profondes implications épidémiologiques et évolutives pour les pathogènes qu'elles transmettent. / Host specialization and host-race formation may be key processes in maintaining and generating diversity within parasite populations. The objective of this thesis was to analyze these processes in the seabird tick Ixodes uriae, a common and widely distributed ectoparasite that exploits a great diversity of seabird host species, to better understand the relative role of host-related constraints and geographic factors in its evolution and diversification. I addressed this question using different approaches, including population genetic and phylogeographic analyses, morphometry and field experimentation. Results show that the spatial factor is a key component in shaping the diversity of I. uriae, as four geographical genetically isolated groups exist within the global distribution of this parasite. The formation of host races is also a general process in the evolution of I. uriae, but has evolved to different degrees in different geographical regions. Host preference in the tick, along with mechanical or physiological host-related constraints (e.g., beak morphology, blood digestion, immune response) are likely involved in the evolution of I. uriae host races. Overall, results fall in line with the geographic mosaic theory of evolution that predicts that the outcome of species interactions can vary across geographic landscapes, highlighting the role played by ecological characteristics of the host in the diversification of I. uriae. Given results to date, host specialization may be a common process in tick systems and thus may have strong epidemiological and evolutionary implications for the pathogens that they transmit.

Ce travail se veut une synthèse sur l'artisanat de Gaule méridionale entre la fin du VIIIe s. et la fin du IIIe s. av. n. è., thématique encore peu abordée dans son ensemble pour cet espace géographique. Il vise à définir les facteurs de la spécialisation des tâches et des individus et à traiter de l'évolution du travail dans les sociétés indigènes. Successivement, seront approchées les activités associées aux arts du feu la métallurgie, la céramique et le verre - et les productions dérivées du travail vivrier les textiles, le cuir et les matières dures animales -. À chaque fois, il s'agira d'identifier les procédés techniques attestés à l'âge du Fer, d'examiner les degrés de technicité associés à chaque activité et de dépeindre l'environnement dans lequel ces opérations se déroulent. Une fois ces considérations posées et à la lumière de cette documentation, les aspects économiques attachés à la production d'objets manufacturés et notamment le rôle de l'artisanat dans le processus de complexification sociale dans lequel les communautés sont alors engagées seront analysés. Enfin, compte tenu de l'importance fondamentale de la composante sociale dans le développement du travail spécialisé, les thèmes liés aux lieux dédiés à la production et à l'apparition des ateliers, au statut et à la place des artisans ou à l'apprentissage seront tour à tour abordés, parfois pour susciter plus de questions que de réponses. / This documentation presents a synthesis concerning the handicrafts of Southern Gaul between the end of the VIIIth and the end of the IIIrd century B.C., a topic that has not been overly dealt with globally with respect to that geographical area. It aims at defining the factors determining the specialization of tasks and individual people as well as discussing the evolution of activities within the indigenous societies. Subsequently the activities associated with the arts of fire will be dealt with, i.e. metallurgy, ceramics and glass as well as the products derived from cottage industry, i.e. textiles, leather and hard materials stemming from animals. There always arises the need of identifying the technical procedures bearing witness to the Iron Age, of examining the degrees of technical achievement associated with each and every activity and of depicting the environment where these operations take place. Once those considerations are established - and in the light of that documentation - we shall analyze the economic aspects underlying the production of hand-made objects and namely the role played by handicrafts in the creation of an ever more complex society made up by the individual communities. Finally, given the fundamental importance of the social component in the development of specialized activities, the topics connected with the actual place of production, with the appearance of workshops, with the status and place of the craftsmen or with the institution of apprenticeship will be alternately dealt with; sometimes giving rise to more questions than answers.

The purpose of this thesis focused on a literature curriculum designed to improve reading comprehension through the stimulation of the right hemisphere of the brain. A case study of this curriculum development effort involved a third-grade student from a local public 2 school. He was a part-time Specific Learning Disability student with weaknesses in visual organization, visual concentration, and reading comprehension. A time span of six weeks was dedicated to increasing the child's reading comprehension within a literature framework through the use of right-brain stimulants, specifically, color and visualization. The Gates-MacGinitie Reading Test, Level C, administered at the conclusion of the instructional sessions, and teacher observation provided the evaluation of the curriculum. Results of the study proved inconclusive. Further field study was recommended.

Body size is a fundamental structural characteristic of organisms, determining critical life history and physiological traits, and influencing population dynamics, community structure, and ecosystem function. For my dissertation, I focused on effects of body size on habitat use and diet of important coastal fish predators, as well as their influence on faunal communities in Bahamian wetlands. First, using acoustic telemetry and stable isotope analysis, I identified high variability in movement patterns and habitat use among individuals within a gray snapper (Lutjanus griseus) and schoolmaster snapper (L. apodus) population. This intrapopulation variation was not explained by body size, but by individual behavior in habitat use. Isotope values differed between individuals that moved further distances and individuals that stayed close to their home sites, suggesting movement differences were related to specific patterns of foraging behavior. Subsequently, while investigating diet of schoolmaster snapper over a two-year period using stomach content and stable isotope analyses, I also found intrapopulation diet variation, mostly explained by differences in size class, individual behavior and temporal variability. I then developed a hypothesis-testing framework examining intrapopulation niche variation between size classes using stable isotopes. This framework can serve as baseline to categorize taxonomic or functional groupings into specific niche shift scenarios, as well as to help elucidate underlying mechanisms causing niche shifts in certain size classes. Finally, I examined the effect of different-sized fish predators on epifaunal community structure in shallow seagrass beds using exclusion experiments at two spatial scales. Overall, I found that predator effects were rather weak, with predator size and spatial scale having no impact on the community. Yet, I also found some evidence of strong interactions on particular common snapper prey. As Bahamian wetlands are increasingly threatened by human activities (e.g., overexploitation, habitat degradation), an enhanced knowledge of the ecology of organisms inhabiting these systems is crucial for developing appropriate conservation and management strategies. My dissertation research contributed to this effort by providing critical information about the resource use of important Bahamian fish predators, as well as their effect on faunal seagrass communities.

Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2016-02-29T22:55:34Z No. of bitstreams: 1 Disserta??o Danielle Mendes Carvalho.pdf: 1158711 bytes, checksum: b9a8e1c6f59d19bb451209ed9144c6f5 (MD5) / Made available in DSpace on 2016-02-29T22:55:34Z (GMT). No. of bitstreams: 1 Disserta??o Danielle Mendes Carvalho.pdf: 1158711 bytes, checksum: b9a8e1c6f59d19bb451209ed9144c6f5 (MD5) Previous issue date: 2013-02-04 / Funda??o de Amparo ? Pesquisa do Estado da Bahia - FAPEB / Different strategies of resource exploitation can lead to divergences in species niche realized. Niche differentiation may involve several niche dimensions, which can differ, especially in the diet, in space, and time. In this study, we measured the redundancy level or complementarity in the interaction network in a bee community associated with an agricultural system. The hypothesis is that the degree of trophic overlap on the diet axis in the community is low, with high complementarity, since there is difference in the resource supply over the vintages and, that the overlap on time axis is high with high redundancy at the time of the use of floral resources. The overlap niche on diet axis was low (NOih = 0.18) and 88% of pairs showed overlap values below 30%. Niche overlap on time axis was intermediate (NOih = 0.49), and 65% of pairs showed overlap values between 30 and 60%. The network analysis showed that the bees separate its niche on diet axis and presented additional intermediate specialization (H2 '= 0.46). And on the time axis (H2 '= 0.12) bees were considered generalists, with high temporal redundancy. When we tested whether environmental requirements determined the high redundancy at the time of use of floral resources, we verified that the temperature was not a guiding factor to structure the niche overlap in relation to the time of use. The results indicate that the low niche overlap on the diet axis and the intermediate overlap on the time axis should be reflecting the plurality of floral resources choices by different bee species, which used broad resource spectrum. / Diferentes estrat?gias de explora??o dos recursos podem levar a diverg?ncias no nicho realizado das esp?cies. Diferencia??es de nicho podem envolver diversas dimens?es do nicho, podendo diferir, sobretudo na dieta, no espa?o e no tempo. Neste estudo mensuramos o n?vel de redund?ncia ou complementaridade na rede de intera??o em uma comunidade de abelhas associada a um sistema agr?cola. Nossa hip?tese de trabalho ? que o n?vel de sobreposi??o tr?fica no eixo da dieta na comunidade seja baixo, com alta complementaridade, visto que h? diferen?a na oferta de recurso ao longo das safras e, que a sobreposi??o no eixo temporal seja alta com alta redund?ncia nos hor?rios de uso dos recursos florais. A sobreposi??o de nicho no eixo da dieta foi baixa (NOih= 0,18), e 88% dos pares apresentaram valores de sobreposi??o abaixo de 30%. A sobreposi??o de nicho no eixo temporal foi intermedi?ria (NOih= 0,49), e 65% dos pares apresentaram valores de sobreposi??o entre 30 e 60%. A an?lise de rede mostrou que as abelhas separam seu nicho no eixo da dieta e apresentaram especializa??o complementar intermedi?ria (H2?=0,46). E no eixo temporal (H2?=0,12) as abelhas foram consideradas generalistas, com alta redund?ncia temporal. Ao testarmos se requerimentos ambientais determinaram a alta redund?ncia nos hor?rios de uso dos recursos florais verificamos que a temperatura n?o foi um fator norteador para estruturar a sobreposi??o de nicho em rela??o ao hor?rio. Os nossos resultados indicam que a baixa sobreposi??o do nicho no eixo da dieta e a intermedi?ria sobreposi??o no eixo temporal devem ser reflexo da pluralidade das escolhas de recursos florais por diferentes esp?cies de abelhas, que utilizaram amplo espectro de recursos.