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Добірка наукової літератури з теми "Amazonian savanna"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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Статті в журналах з теми "Amazonian savanna"

Costa-Campos, Carlos Eduardo, and Eliza Maria Xavier Freire. "Richness and composition of anuran assemblages from an Amazonian savanna." ZooKeys 843 (May 9, 2019): 149–69. http://dx.doi.org/10.3897/zookeys.843.33365.

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The Amazonian savannas occupy approximately 150,000 km2 of the Brazilian Amazon, occurring in scattered isolated patches over large areas of forest in the states of Amapá, Amazonas, Pará, Roraima and Rondônia. Despite having considerable variation in the Anuran composition between locations and between the savanna’s physiognomies, a systematic and geographically wide sampling has not been performed for the savanna from Amapá yet, located in the north of Brazil, eastern Amazonia. In this perspective, a study was conducted on the richness, composition, diversity, and abundance of Anuran species

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Costa-Campos, Carlos Eduardo, and Freire Eliza Maria Xavier. "Richness and composition of anuran assemblages from an Amazonian savanna." ZooKeys 843 (May 9, 2019): 149–69. https://doi.org/10.3897/zookeys.843.33365.

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The Amazonian savannas occupy approximately 150,000 km2 of the Brazilian Amazon, occurring in scattered isolated patches over large areas of forest in the states of Amapá, Amazonas, Pará, Roraima and Rondônia. Despite having considerable variation in the Anuran composition between locations and between the savanna's physiognomies, a systematic and geographically wide sampling has not been performed for the savanna from Amapá yet, located in the north of Brazil, eastern Amazonia. In this perspective, a study was conducted on the richness, composition, diversity, and abundance of Anur

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Devecchi, Marcelo F., Juliana Lovo, Marcelo F. Moro, et al. "Beyond forests in the Amazon: biogeography and floristic relationships of the Amazonian savannas." Botanical Journal of the Linnean Society 193, no. 4 (2020): 478–503. http://dx.doi.org/10.1093/botlinnean/boaa025.

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Abstract Open habitats such as grasslands occupy &lt; 5% of the Amazon and are currently grouped under the broad term Amazonian savanna, covering an area of c. 267 000 km2, mostly in Brazil and Bolivia. These habitats are found isolated within an extensive rainforest matrix, having a distinct flora from the latter. The lower Amazon River is home to several patches of savanna that occupy both south and north banks of the river, in Santarém, Alenquer and Monte Alegre. Although having an abundance of herbaceous plants, most studies on these open areas focus only on tree species, ignoring the

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Campos, Ana Caroline De Souza, and Mário Augusto Gonçalves Jardim. "Composição florística da regeneração de um trecho de savana na Amazônia Oriental." Revista Brasileira de Geografia Física 13, no. 6 (2020): 2777. http://dx.doi.org/10.26848/rbgf.v13.6.p2777-2787.

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O objetivo da pesquisa foi conhecer a composição florística da regeneração natural de um trecho de savana amazônica no estado do Pará. O estudo foi realizado em uma savana na localidade de Itapuá, município de Vigia de Nazaré, Pará a 93 km da cidade de Belém. A coleta de dados ocorreu mensalmente no período de setembro de 2019 a fevereiro de 2020 em 80 subparcelas de 1 x 1m alocadas aleatoriamente correspondente a 480 subparcelas em um total de 480 m2. Em cada subparcela foram identificadas e quantificadas todas as espécies com altura ≤ 1 m. A identificação botânica in loco foi realizada por u

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CASTRO, DARCILÉA F., PAULO E. DE OLIVEIRA, DILCE F. ROSSETTI, and LUIZ C. R. PESSENDA. "Late Quaternary landscape evolution of northeastern Amazonia from pollen and diatom records." Anais da Academia Brasileira de Ciências 85, no. 1 (2013): 35–55. http://dx.doi.org/10.1590/s0001-37652013000100004.

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The main goal of this study was to reconstruct the Late Pleistocene-Holocene floristic composition in an area of the northern Brazilian Amazonia, comparing the results with other Amazonian localities in order to discuss the factors that have influenced phytophysiognomic changes over this time period. The work in eastern Marajó Island at the mouth of the Amazonas River was approached based on analysis of 98 pollen and diatom samples from core data distributed along a proximal to distal transect of a paleoestuarine system. The results indicated high concentration of Rhizophora, associated with a

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Faria, Alessandra Saraiva, Albertina Pimentel Lima, and William Ernest Magnusson. "The effects of fire on behaviour and relative abundance of three lizard species in an Amazonian savanna." Journal of Tropical Ecology 20, no. 5 (2004): 591–94. http://dx.doi.org/10.1017/s0266467404001798.

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Most savanna areas are affected by fire (San José & Fariñas 1983, Scholes & Archer 1997), and presumably all of the fauna that normally occurs in them have characteristics that allow them to maintain populations despite regular fires. Fires are frequent in Amazonian savannas and the vegetation is fire adapted. The Amazonian savanna at Alter do Chão suffers regular fires that affect vegetation structure (Sanaiotti & Magnusson 1995). Fires pass quickly in this area, the vegetation recovers most of the pre-fire cover within 6 mo, and there appears to be no long-term effect on soil str

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Santana, Mariana Martins Medeiros de, Rodrigo Nogueira de Vasconcelos, Salustiano Vilar da Costa Neto, Eduardo Mariano Neto, and Washington de Jesus Sant’Anna da Franca Rocha. "Modeling Plant Diversity Responses to Fire Recurrence in Disjunct Amazonian Savannas." Land 14, no. 7 (2025): 1455. https://doi.org/10.3390/land14071455.

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Fire is a key ecological driver in tropical savannas, yet its effects on plant biodiversity remain understudied in Amazonian savannas. This study investigates how fire recurrence influences taxonomic and functional diversity in savanna ecosystems in northeastern Amazonia. We conducted vegetation surveys across five phytophysiognomies in Amapá State, Brazil, and compiled trait data for 226 plant species. Generalized Additive Mixed Models (GAMMs) were used to evaluate the relationships between fire frequency and diversity metrics across five landscape scales. The results showed that taxonomic di

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Mustin, Karen, William D. Carvalho, Renato R. Hilário, et al. "Biodiversity, threats and conservation challenges in the Cerrado of Amapá, an Amazonian savanna." Nature Conservation 22 (October 3, 2017): 107–27. https://doi.org/10.3897/natureconservation.22.13823.

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An Amazonian savanna in northern Brazil known as the Cerrado of Amapá is under imminent threat from poor land-use planning, the expansion of large-scale agriculture and other anthropogenic pressures. These savannas house a rich and unique flora and fauna, including endemic plants and animals. However, the area remains under-sampled for most taxa, and better sampling may uncover new species. We estimate that only ~9.16% of these habitats have any kind of protection, and legislative changes threaten to further weaken or remove this protection. Here we present the status of knowledge concerning t

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Vasconcelos, Marcelo Ferreira de, Sidnei De Melo Dantas, and José Maria Cardoso da Silva. "Avifaunal inventory of the Amazonian savannas and adjacent habitats of the Monte Alegre region (Pará, Brazil), with comments on biogeography and conservation." Boletim do Museu Paraense Emílio Goeldi - Ciências Naturais 6, no. 2 (2021): 119–45. http://dx.doi.org/10.46357/bcnaturais.v6i2.618.

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Knowledge of the avifaunal composition of Amazonian savannas is important in facilitating a greater understanding of the patterns of evolution of the regional biota. Despite this, this vegetation type has been poorly sampled in comparison to adjacent rainforest habitats. The aim of this paper is to provide an avifaunal inventory of the savannas and other adjacent habitats of Monte Alegre, on the left bank of Amazon River, northwestern Pará, Brazil. Our survey is based both on our own fieldwork and on previously-collected specimens deposited in museums. A total of 300 bird species have been rec

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Pandilha, Joandro, José Júlio de Toledo, Luis Cláudio Fernandes Barbosa, William Douglas Carvalho, Jackson Cleiton de Sousa, and José Maria Cardoso da Silva. "Composition, richness and nestedness of gallery forest bird assemblages in an Amazonian savanna landscape: lessons for conservation." PeerJ 9 (December 1, 2021): e12529. http://dx.doi.org/10.7717/peerj.12529.

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Gallery forests are important to the maintenance of a substantial portion of the biodiversity in neotropical savanna regions, but management guidelines specific to this forest type are limited. Here, we use birds as study group to assess if: (1) functional traits can predict the abundance and occupancy of forest species within a savanna landscape, (2) habitat structures influence the taxonomic, functional, and phylogenetic diversity of forest assemblages, and (3) less diverse gallery forest assemblages are a nested subset of more diverse assemblages living near continuous forests. Then, we pro

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Дисертації з теми "Amazonian savanna"

Sanaiotti, Tania Margarete. "The woody flora and soils of seven Brazilian Amazonian dry savanna areas." Thesis, University of Stirling, 1996. http://hdl.handle.net/1893/12214.

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This study compares the soils, floristic composition, phytosociological structure and history of seven Brazilian savannas in the Amazon basin: those at Alter do Chao, Amapa, Roraima and SE Humaita are islands in rain forest; and those at Chapada dos Parecis, Redencao, and Carolina are on the periphery (northern border) of the central Brazilian savannas (the so-called 'cerrado'). A total of 26 transects were sampled by the PCQ method (for trees with dbh greater than or equal to 5 cm) and additional tree species were recorded by 'wide patrolling'. A total of 101 species were recorded from the tr

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Burbridge, Rachel. "The Late Quaternary vegetation and climate history of the southern Amazonian rainforest-savanna boundary, eastern Bolivia." Thesis, University of Leicester, 2001. http://hdl.handle.net/2381/30397.

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Pollen and charcoal analyses have been undertaken on a 43 000 year old sediment core from Laguna Chaplin, in Noel Kempff Mercado National Park, at the southern Amazon margin. The aims of this research were to 1. determine when the present day rainforest communities became established in the park, 2. determine the composition of these former savannas and/or forests, 3. determine the broad-scale significance of rainforest dynamics in NKMNP in the context of previously published palaeoclimatic studies in other parts of Amazonia and the Bolivian Andes and 4. reconstruct the late Quaternary movemen

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Metcalfe, P. R. "The late Quaternary history of the rainforest-savanna boundary in SW Amazonia." Thesis, Swansea University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638185.

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This research assesses how forest-savanna boundaries have shifted in response to past environmental changes, which is crucial to understanding the present-day vegetation mosaic and the origins of Amazon biodiversity as a whole. Individual plant leaf-wax compounds can be extracted from lake sediments and their isotopic values measured by compound-specific 13C analysis, permitting the evaluation of past changes in the abundance of C3 and C4 graminoids, and thereby clarify ambiguities in the pollen record. In this study, a multiproxy approach, using grass-cuticle assemblages and stable carbon-iso

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Barbosa, Cylles Zara dos Reis. "Pirênios e plântulas de três espécies de malpighiaceae de uma savana amazônica: aspectos morfológicos e tecnológicos." Universidade Federal do Amazonas, 2015. http://tede.ufam.edu.br/handle/tede/4047.

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Submitted by Kamila Costa (kamilavasconceloscosta@gmail.com) on 2015-06-10T21:05:08Z No. of bitstreams: 1 Tese-Cylles Z dos R Barbosa.pdf: 1619084 bytes, checksum: a4e34330ec2aabc4f71f03f36d92fba5 (MD5) Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2015-06-11T17:56:17Z (GMT) No. of bitstreams: 1 Tese-Cylles Z dos R Barbosa.pdf: 1619084 bytes, checksum: a4e34330ec2aabc4f71f03f36d92fba5 (MD5) Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2015-06-11T17:59:06Z (GMT) No. of bit

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Flores, Bernardo Monteiro. "Resilience of Amazonian forests: the roles of fire, flooding and climate." PROGRAMA DE P?S-GRADUA??O EM ECOLOGIA, 2016. https://repositorio.ufrn.br/jspui/handle/123456789/23363.

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Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-05-31T20:48:53Z No. of bitstreams: 1 BernardoMonteiroFlores_TESE.pdf: 5558527 bytes, checksum: 3d089857ab97610805c4b3498936d429 (MD5) Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-06-01T21:38:09Z (GMT) No. of bitstreams: 1 BernardoMonteiroFlores_TESE.pdf: 5558527 bytes, checksum: 3d089857ab97610805c4b3498936d429 (MD5) Made available in DSpace on 2017-06-01T21:38:09Z (GMT). No. of bitstreams: 1 BernardoMonteiroFlores_TESE.pdf: 5558527 bytes, checksum: 3d089857ab97610805c4

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Azevedo-Ramos, Claudia de Barros e. "Ecologia de comunidade de girinos as margens do Rio Tapajos em uma região de savana amazonica." [s.n.], 1995. http://repositorio.unicamp.br/jspui/handle/REPOSIP/316294.

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Orientador: William Ernest Magnusson Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia Made available in DSpace on 2018-07-20T23:16:24Z (GMT). No. of bitstreams: 1 Azevedo-Ramos_ClaudiadeBarrose_D.pdf: 13423398 bytes, checksum: 98adcefd31835961f0c5b429504c0ba2 (MD5) Previous issue date: 1995 Resumo: A maioria dos estudos envolvendo comunidades de Anuros baseiam-se na fase de vida adulta do seu ciclo de vida e enfatizam a região temperada. Consequentemente, ainda existe muita controvérsia com relação a importância relativa dos fatores responsáveis pela organ

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Cutrim, Jessé Gonçalves. "PROCESSOS DE APROPRIAÇÃO DO CERRADO AMAZÔNICO MARANHENSE: Agroindústria canavieira e sua relação socioeconômica e ambiental em Campestre." Pontifícia Universidade Católica de Goiás, 2011. http://localhost:8080/tede/handle/tede/1014.

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Made available in DSpace on 2016-07-27T13:49:44Z (GMT). No. of bitstreams: 1 Jesse Goncalves Cutrim.pdf: 2774161 bytes, checksum: c360b9a9826d2517b584fa34250e4579 (MD5) Previous issue date: 2011-03-18 This study examines in a broader perspective, the territorial changes produced in the Amazonico Maranhense Savannah . These are strongly related to the expansion fronts and development of the agricultural frontier in evidence. From the years 1980 accelerate the process of implementation of large agricultural projects and development in the region, which is part of the legal Amazon, in an ar

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Renard, Delphine. "Histoire et écologie des complexes de champs surélevés dans les savanes côtières de Guyane française." Thesis, Montpellier 2, 2010. http://www.theses.fr/2010MON20225.

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L'Amazonie a connu une longue histoire d'occupation humaine. La nature et l'échelle de l'impact des populations d'Amérindiens précolombiens sur leur environnement sont encore largement débattues. Dans une approche pluridisciplinaire, la thèse vise 1) à améliorer les estimations de l'étendue des remaniements anciens des paysages par l'Homme et 2) à comprendre comment ces remaniements affectent la structure et le fonctionnement des écosystèmes contemporains par l'étude des complexes de champs surélevés précolombiens des savanes côtières de Guyane française. Pour la mise en place d'une agricultur

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Panfil, Steven Nelson. "Late Holocene forest and savanna diversity and dynamics across an Amazonian ecotone." 2001. http://purl.galileo.usg.edu/uga%5Fetd/panfil%5Fsteven%5Fn%5F200112%5Fphd.

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Thesis (Ph. D.)--University of Georgia, 2001. Directed by Chris J. Peterson. Includes articles submitted to Conservation biology, Biological conservation, Quaternary research, and Journal of vegetation science. Includes bibliographical references (leaves 137-147).

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Rodriguez, Zorro Paula Andrea. "Late quaternary vegetation and climate dynamics in western amazonia." Doctoral thesis, 2017. http://hdl.handle.net/11858/00-1735-0000-0023-3E0F-2.

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Книги з теми "Amazonian savanna"

Kästner, K. P. Amazonien: Indianer der Regenwälder und Savannen. Museum für Völkerkunde, Staatliche Etnographische Sammlungen Sachsen, 2009.

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Dresden, Museum für Völkerkunde, and Staatliche Ethnographische Sammlungen Sachsen, eds. Amazonien: Indianer der Regenwälder und Savannen. Museum für Völkerkunde, Staatliche Etnographische Sammlungen Sachsen, 2009.

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Частини книг з теми "Amazonian savanna"

Lloyd, J., M. L. Goulden, J. P. Ometto, S. Patiño, N. M. Fyllas, and C. A. Quesada. "Ecophysiology of forest and savanna vegetation." In Amazonia and Global Change. American Geophysical Union, 2009. http://dx.doi.org/10.1029/2008gm000740.

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Denevan, William M. "Lost Systems of Cultivation." In Cultivated Landscapes of Native Amazonia And the Andes. Oxford University PressOxford, 2001. http://dx.doi.org/10.1093/oso/9780198234074.003.0011.

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Abstract Prior to 1963, the term ‘raised field’ was not to be found in either the agricultural or archaeological literature. And the term ‘drained field’ was mostly used for modern wetland fields. In 1961, geologist George Plafker and I became aware of what seemed to be pre-Hispanic agricultural fields in the form of ridges, mounds, and ditches in the seasonal swamps of the Llanos de Mojos, an enormous but little known savanna in Bolivian Amazonia (Plafker 1963; Denevan 1962; 1963a). Aerial reconnaissance, ground survey, and examination of air photos convinced us that these features were indee

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A. Montag, Luciano Fogaca de, Tiago Magalhaes da S. Freitas, Ana Cristina, and Ronaldo B. "Environmental Assessment and Aquatic Biodiversity Conservation of Amazonian Savannas, Marajó Island, Brazil." In Research in Biodiversity - Models and Applications. InTech, 2011. http://dx.doi.org/10.5772/22997.

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Costa, Gabriel, Cláudio Silva, Keila R. Mendes, et al. "The Relevance of Maintaining Standing Forests for Global Climate Balance: A Case Study in Brazilian Forests." In Tropical Forests - Ecology, Diversity and Conservation Status [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.110533.

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Estimate Net Ecosystem Exchange (NEE) is important to better understand carbon exchanges between terrestrial ecosystems and the atmosphere. Comprehend these dynamics is essential to better understand the responses of environments to ongoing climatic changes. This study aims to analyze, with AMERIFLUX and LBA network measurements, the variability of NEE and climate variables in four different tropical coverages: Pantanal, Amazonia, Caatinga and Cerrado (savanna). Furthermore, was estimate the Gross Primary Productivity (GPP). We found a distinct seasonality of meteorological variables and CO2 f

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"Account of the Second Expedition: Expedition to the Trio of the Paru Savannah in Northern Brazil June 23–September 23, 1941." In The Humble Ethnographer: Lodewijk Schmidt's Accounts from Three Voyages in Amazonian Guiana. BRILL, 2020. http://dx.doi.org/10.1163/9789004430495_010.

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Severo, Ednaldo Bras, and Rogério Ribeiro Marinho. "ANÁLISE DAS MUDANÇAS NA COBERTURA DO SOLO E NA PRECIPITAÇÃO NA BACIA DOS RIOS BENI E MAMORÉ." In A geografia amazônica em múltiplas escalas Volume 3. Alexa Cultural, 2023. http://dx.doi.org/10.29327/5361714.1-1.

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A Bacia do rio Madeira, situada no sudoeste da Amazônia brasileira, é uma região de grande importância ecológica. Com uma área aproximada de 1,4 milhão de quilômetros quadrados (MUNIZ; FILIZOLA, 2015), abrange uma diversidade de ecossistemas, desde florestas tropicais úmidas até savanas. O rio Madeira é um dos principais afluentes do rio Amazonas, e em termos de vazão está entre os 10 maiores rios do mundo (LATRUBESSE et al., 2005)b. Seu curso fluvial é bastante navegável e contribui para o escoamento da produção principalmente de grãos de soja e milho da região centro-oeste a norte do territó

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Тези доповідей конференцій з теми "Amazonian savanna"

César, Rômulo, Liliane Martins Minhós, and André Luiz Alencar de Mendonça. "SENSORIAMENTO REMOTO NA IDENTIFICAÇÃO DE SAVANAS AMAZÔNICAS NO SUL DO AMAZONAS E ATRIBUIÇÃO DE FITOFISIONOMIAS PARA O CAR." In 9° Congresso Florestal Brasileiro. Softaliza Tecnologias LTDA, 2022. http://dx.doi.org/10.55592/cfb.2022.3539120.

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