20 documents found, page 1 of 2
Organização comunitária de um encrave de cerrado sensu stricto no bioma Caating...
Costa, Itayguara Ribeiro da; Araújo, Francisca Soares de(Community organization of cerrado sensu stricto within the Caatinga Biome, Araripe plateau, Barbalha Municipality, Ceará). This paper describes the community organization of a cerrado area within the Caatinga Biome, semiarid Northeast Brazil, on the Araripe plateau, Barbalha Municipality, Ceará State. The phytosociological survey was carried out using the point-centered quarter method (200 points) and included...
Flora e aspectos auto-ecológicos de um encrave de cerrado na chapada do Araripe...
Costa, Itayguara Ribeiro da; Araújo, Francisca Soares de; Lima-Verde, Luiz Wilson(Flora and autecology’s aspects of a disjunction cerrado at Araripe plateau, Northeastern Brazil). This study subject to investigate the floristic composition and richness, the reproductive phenological patterns, the dispersal syndromes and life forms of species of a disjunt cerrado in semiarid climate at Araripe plateau during a one year period. We found 107 species and 41 families. Fabaceae, Myrtaceae, Poacea...
Paleodistribution of Neotropical species of Erythroxylum (Erythroxylaceae) in h...
Cordeiro, Luciana Silva; Araújo, Francisca Soares de; Koch, Ingrid; Simões, André Olmos; Martins, Fernando Roberto; Loiola, Maria Iracema BezerraVariation in environmental conditions during the Quaternary period served as important fi lters for the maintenance of vegetation types and for determining the composition of the current biota. We analyzed oscillations in the distributions of diff erent vegetation types in Brazil during the Quaternary period using species of the genus Erythroxylum (Erythroxylaceae) because of the vast heterogeneity of habitats ...
Assessing landsat images availability and its effects on phenological metrics
Mas, Jean-François; Araújo, Francisca Soares deLandsat imagery offers the most extended continuous land surface observation at 30 m spatial resolution and is widely used in land change studies. On the other hand, the recent developments on big data, such as cloud computing, give new opportunities for carrying out satellite-based continuous land cover monitoring including land use/cover change and more subtle changes as forest degradation, agriculture intens...
Paleodistribution of Neotropical species of Erythroxylum (Erythroxylaceae) in h...
Cordeiro, Luciana Silva; Araújo, Francisca Soares de; Koch, Ingrid; Simões, André Olmos; Martins, Fernando Roberto; Loiola, and Maria Iracema BezerraVariation in environmental conditions during the Quaternary period served as important fi lters for the maintenance of vegetation types and for determining the composition of the current biota. We analyzed oscillations in the distributions of diff erent vegetation types in Brazil during the Quaternary period using species of the genus Erythroxylum (Erythroxylaceae) because of the vast heterogeneity of habitats ...
A Phytogeographical Metaanalysis of the Semiarid Caatinga Domain in Brazil
Moro, Marcelo Freire; Lughadha, Eimear Nic; Araújo, Francisca Soares de; Martins, Fernando RobertoSeasonally Dry Tropical Plant Formations (SDTFs) are among the most threatened biomes worldwide. Nevertheless, they have received less scientific attention than rainforests or savannas. One such SDTF, the Caatinga Phytogeographic Domain (CPD), is the largest semiarid tropical ecoregion in South America. Earlier floristic studies of the Caatinga flora discerned two floristic groups in the CPD, in terrains of cry...
The role of edaphic environment and climate in structuring phylogenetic pattern...
Moro, Marcelo Freire; Silva, Igor Aurélio; Araújo, Francisca Soares de; Lughadha, Eimear Nic; Meagher, Thomas R.; Martins, Fernando RobertoSeasonally dry tropical plant formations (SDTF) are likely to exhibit phylogenetic clustering owing to niche conservatism driven by a strong environmental filter (water stress), but heterogeneous edaphic environments and life histories may result in heterogeneity in degree of phylogenetic clustering. We investigated phylogenetic patterns across ecological gradients related to water availability (edaphic environ...
How much importance is given to native plants in cities’ treescape? A case stud...
Moro, Marcelo Freire; Westerkamp, Christian; Araújo, Francisca Soares deEven though Brazil is a mega-diverse country, many Brazilian cities prioritize exotic plants in their treescapes. Aiming to evaluate how much the treescape in Fortaleza (the fifth largest city in Brazil) is aligned with the policy of valorization of native biodiversity, we sampled street and backyard trees surrounding one of the few vegetation fragments of the city, which is an area considered a priority for co...
Análise da disponibilidade de imagens Landsat e Sentinel para o Brasil
Mas, Jean Francois; Sopchaki, Carlos Henrique; Rabelo, Francisco Davy Braz; Araújo, Francisca Soares de; Solórzano, Jonathan V.This paper analyzed the availability of cloud-free data from the programs Landsat (surface reflectance, 1982- 2019) and Sentinel-2 (TOA reflectance, 2015-2019) over the Brazilian territory. In the case of Landsat, the amount of information available increased considerably in 1999 with the start of Landsat 7. However, mainly due to the presence of clouds, the availability of data varies greatly in space and time...
Who is who in the understory: the contribution of resident and transitory group...
Westphalen, Juliana Silva Gomes; Lins-e-Silva, Ana Carolina Borges; Araújo, Francisca Soares deThe forest understory is made up of resident and transitory species and can be much richer than the canopy. With the purpose to describe the contribution of these groups to the woody understory, five Atlantic Forest fragments were selected and studied in Northeastern Brazil. In order to analyze the understory’s structure, the sample included woody individuals with circumference at breast height (CBH) smaller th...