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| Registros recuperados: 115 | |
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| Stier, Anna; De Carvalho, William D.; Rostain, Stephen; Catzeflis, Francois; Claessens, Olivier; Dewynter, Mael; Mckey, Doyle; Mustin, Karen; Palisse, Marianne; De Thoisy, Benoit. |
| The Amazonian savannas of French Guiana are rare and of high ecological and cultural value but are also highly threatened. They are socioecological systems that have been coconstructed by humans and nature and today form mosaic landscapes along the country's coast. From pre-Columbian raised fields through colonial and Creole uses to contemporary uses, they have been largely shaped and modified by human activities. They are currently threatened by changes in fire regimes, agricultural practices, invasive species, and infrastructure development. Less than 3% are protected, despite their importance for several endangered animal and plant species. A shift is required in the way we think about their conservation to create a new strategy that would be completely... |
| Tipo: Text |
Palavras-chave: Archeology; Biodiversity; Conservation; French Guiana; Savanna; Socioecological systems. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00607/71928/70614.pdf |
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| SOUZA,MARCELO C.; FRANCO,AUGUSTO C.; HARIDASAN,MUNDAYATAN; ROSSATTO,DAVI R.; ARAÚJO,JANAÍNA F. DE; MORELLATO,LEONOR P.C.; HABERMANN,GUSTAVO. |
| Despite limitations of low fertility and high acidity of the soils, the cerrado flora is the richest amongst savannas. Many cerrado woody species show sclerophyllous leaves, which might be related to the availability of water and nutrients in the soil. To better understand the function and structure of cerrado vegetation within its own variations, we compared two cerrado communities: one in its core region in central Brazil (Brasília, DF) and the other on its southern periphery (Itirapina, SP). We contrasted the length of the dry season, soil fertility rates, leaf concentrations of N, P, K, Ca and Mg and the specific leaf area (SLA) between these communities. The dry season was shorter on the periphery, where the soil was more fertile although more acidic.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Savanna; Mineral nutrition; Rainfall seasonality; Specific leaf area. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401691 |
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| Faria,Luiz Roberto Ribeiro; Silveira,Fernando Amaral da. |
| The composition of local orchid-bee faunas (Hymenoptera, Apidae, Euglossina) in open-vegetation domains is poorly known, making the ecology and biogeography of the group difficult to understand. The aim of this work was to answer the following questions: i) Is the orchid-bee fauna composition, species richness and abundance in the cerrado (Brazilian savanna) sensu stricto similar to that of riparian forests immersed in that domain? ii) Do species from neighboring forest domains use riparian forests as mesic corridors into the Cerrado? Two sites in cerrado s.s. and two in riparian forests were sampled monthly, one day per month, during one year (Nov/2003-Oct/2004) in northwestern Minas Gerais state, Brazil. Six aromatic compounds (β-ionone, 1,8-cineole,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Euglossina; Riparian forest; Gallery forest; Savanna; Landscape ecology. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000400009 |
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| Lopes,Benedito C.. |
| A survey on the use of host plants by treehoppers in plants in cerrado (savanna) vegetation at Moji-Guaçu (São Paulo, Southeastern Brazil) was made. Fifty-two species of treehoppers were recorded in association with 40 host plant species from October 1980 to February 1982. The families Araliaceae, Asteraceae, Leguminosae, Malpighiaceae, Myrtaceae and Nyctaginaceae were the most commonly used for oviposition. Byrsonima intermedia A. Juss. (Malpighiaceae) had the highest number of associated treehopper species (10 species). The abundance of treehopper individuals was related to the hot and rainy season (from October to February), while during the cold and dry season (from March to September) there was a decrease in the number of these Homoptera. After the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Homoptera; Membracidae; Treehoppers; Savanna; Brazil. |
| Ano: 1995 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000300015 |
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| Arruda,Filipe Viegas de; Sousa,Diego Guimarães de; Teresa,Fabrício Barreto; Prado,Vitor Hugo Mendonça do; Cunha,Hélida Ferreira da; Izzo,Thiago Junqueira. |
| Abstract Fire management is an important issue in the Brazilian Cerrado, since both anthropogenic high intensity fires and complete fire suppression can reduce the biodiversity in this biome. In this paper, we highlight the trends in scientific literature about fire effects in the Cerrado, aiming to detect possible gaps and to indicate directions of future scientific research. We searched for articles in the periodic database Web of Knowledge from 1991 to 2016, and observed an increase in the number of publications throughout the years. Most articles were associated with Brazilian institutions (58%), followed by those with collaboration between Brazilian and international institutions (33%), and those published by authors exclusively from international... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Burning; Scientometrics; Biodiversity Hotspots; Savanna; Perturbation. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000100211 |
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| Cavassan,Osmar; Weiser,Veridiana de Lara. |
| Information on the cerrado vascular flora of the municipality of Bauru has been provided in lists of floristic surveys carried out in fragments of this vegetation type at different times, applying different criteria, and conforming to current taxonomic classifications. We organized this information according to APG III and revised synonymies, aiming at producing a single floristic list of species occurring in cerrado sensu lato or ecotonal areas (transitions between cerrado and seasonal forest) in municipality of Bauru to inform conservation proposals. For this purpose, we referred to all floristic lists of vascular plants found in cerrado fragments in Bauru and to botanic material collected and deposited in the herbaria of the Department of Biological... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Floristics; Savanna; Plant survey. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032015000300205 |
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| Tubelis,Dárius Pukenis. |
| In the Cerrado, veredas are linear physiognomies that occur on hydromorphic soil usually along narrow water courses. They often growth on flat terrain or near headwaters. They are characterised by the abundance of buriti palms (Mauritia flexuosa) that growth over other trees, numerous shrubs and a dense herbaceous stratum. Despite being common landscape elements through the Cerrado's extension, the use of veredas by birds has not been examined in detail. This study aimed to review studies of birds and veredas in the Cerrado. Publications (n = 25) reported the use of veredas by 261 bird species. Only 13 of them had aspects of their biology (reproduction and feeding) studied in detail. Veredas are poorly used by Cerrado's endemic species, but are the major... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Grassland; Landscape; Mauritia; Savanna; Wetland. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000300031 |
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| Aquino,Fabiana de Gois; Walter,Bruno Machado Teles; Ribeiro,José Felipe. |
| This study was conducted in two fragments of "cerrado" stricto sensu in the Gerais de Balsas Colonization Project, located in southern Maranhão, Brazil. The objective was to evaluate the dynamics of the woody plant community, over seven years (1995-2002). Four transects of 160 × 20 m were monitored. All woody plants with a stem diameter > 3 cm, at 0.30 m above ground level, were recorded. In 1995, 983 and 1,177 stems were sampled in fragments 1 and 2, respectively; in 2002, 1057 and 1406 stems were sampled in the same fragments. In 1995, the Shannon diversity indices (H') were 3.07 and 3.33, in fragments 1 and 2, respectively, reaching their maximum value in 2002 of 3.11 and 3.35. The community of fragment 1 showed an increase of 7.5% in density and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fragmentation; Permanent plots; Plant mortality; Recruitment; Savanna. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000100011 |
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| Pinto,José Roberto Rodrigues; Mews,Henrique Augusto; Jancoski,Halina Soares; Marimon,Beatriz Schwantes; Bomfim,Bárbara de Oliveira. |
| Campos de murundus (grasslands dotted with knolls that are covered with savanna-like woody vegetation) are a common landscape in central Brazil. In this study, we assessed for the first time the dynamics of the vegetation in a floodplain campo de murundus, describing changes in composition and structure of the woody vegetation. In 2005, we established 16 permanent 25 × 25 m plots, where we identified and mapped individuals with a trunk diameter at the base ≥ 2.86 cm, as well as measuring the height of those individuals. In 2008 (after two fire events), we resampled the plots. In 2005, we had registered 4.54 m² ha-1 of basal area, 430 individuals, 42 species, 36 genera and 24 families. In 2008, we found an increase in basal area (to 4.65 m² ha-1) and a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Earth mounds; Fire; Mortality; Recruitment; Savanna. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000400005 |
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| Registros recuperados: 115 | |
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