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| Registros recuperados: 18 | |
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| Cunha, Nina Rosa da Silveira; Lima, Joao Eustaquio de; Gomes, Marilia Fernandes Maciel; Braga, Marcelo Jose. |
| Being constituted as the largest risk factor and effective degradation to the Savannah, the man’s intervention in the nature and, especially, the agricultural exploration require analysis and better monitoring. This work aims to analyze the relationship between the agricultural exploration and the environmental degradation in the area of the Savannahs, in 1995-1996. In particular, it is intended, to use multivariate statistical analysis, to verify the factors associated with the intensity of farming predominant in the determination of the degradation pattern, and to obtain indexes of exploration intensity to make possible to categorize and to group the microrregions in terms of degradation potential. The results showed that the intensity of the... |
| Tipo: Journal Article |
Palavras-chave: Environmental degradation; Intensity of agricultural exploration; Savannah; Factorial analysis; Index of environmental degradation.; Agribusiness; Q50.. |
| Ano: 2008 |
URL: http://purl.umn.edu/61241 |
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| Bueno,Adriana de Arruda; Belentani,Sonia Cristina da Silva; Motta-Junior,José Carlos. |
| The feeding ecology of the maned wolf (Chrysocyon brachyurus) was studied from 1998 to 2002 in the Ecological Station of Itirapina, São Paulo State, southeastern Brazil, including estimates of prey number and biomass consumption. A total of 325 faecal samples was collected in the area. The species is omnivorous, with a broad diet including 68 species or morphospecies of fruits and animals. Armadillos (Dasypodidae), wolf's fruit (Solanum lycocarpum) and small mammals (mostly Clyomys bishopi) were the bulk of the diet, comprising 72.8 % of the total estimated biomass consumed (185,323.4 g). In terms of frequency of occurrence, on the other hand, only small mammals and other miscella-neous fruits yielded 43.4 % of the total occurrences (N = 1,054). Animal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chrysocyon brachyurus; Maned wolf; Savannah; Grassland; Feeding ecology; Diet; Brazil. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032002000200007 |
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| Amabile,Renato Fernando; Faleiro,Fábio Gelape; Capettini,Flávio; Peixoto,José Ricardo; Sayd,Ricardo Meneses. |
| ABSTRACT Recently, researches have shown that the Brazilian savannah has a great potential to supply the demand for barley grains. The purpose of this study was to assess the genetic variability in 39 elite barley (Hordeum vulgare L.) genotypes based on the agro-morphological traits of a crop irrigated in the savannah system. An irrigation experiment in the design of complete randomized block with four replicates was conducted at Federal District - Brazil. The evaluated traits were: distance from the last knot to the rachis, distance from the flag leaf to rachis, spike length, number of grains by ear, flag leaf area, plant height, silking, lodging, grain yield, thousand-seed weight, protein content and grain commercial classification. After using analysis... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetic diversity; Hordeum vulgare L.; Genetic resources; Savannah. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000200147 |
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| Terra,Maria Isabela da Costa; Camargo,Flora Ferreira; Macedo,Renato Luiz Grisi; Dias,Bruna Anair Souto; Venturin,Nelson; Nieri,Erick Martins. |
| ABSTRACT: This study aimed to evaluate the growth of rubber tree clones ( Hevea brasiliensis (Willd.exA.Juss.) Müll. Arg.) in the Northwest region of Minas Gerais, Brazil. Randomized blocks, constituted of three treatments (rubber tree clones) and four repetitions were used, and evaluated as plots subdivided in time. Subplots represent the evaluations carried out at the ages 62, 77, 87, 99, 113 and 128 months after planting. It was evaluated survival, stem circumference and total plant height. Current annual increment and average annual increment of circumference and also the number of trees fit for rubber tapping were calculated. Results obtained indicate that clones GT 1, IAN 2880, IAC 15, RRIM 600, PB 235 and IAN 3156 have potential to establish under... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forestry; Savannah; Rubber cultivation; Introduction of forest species.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000601032 |
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| Mizobata,Kellian K. G. S.; Santos,Cinthia M.; Maltoni,Kátia L.; Faria,Gláucia A.; Cassiolato,Ana M. R.. |
| ABSTRACT In areas where soil surface horizons were removed, the main edaphic problems are reduced amounts of organic matter and nutrients. Revegetation, especially with native species, has been indicated to recover these areas. Under this perspective, the present research has been developed to evaluate the contribution of organic and agro-industrial residues, as conditioners of soil fertility and their effects on initial growth of 'Jatobá-do-cerrado' seedlings. The treatments consisted of 4 agro-industrial residue doses (0, 15, 30 and 45 Mg ha-1) and 4 organic residue doses (0, 8, 16 and 32 Mg ha-1), with 16 treatments and 10 replicates. After 8 months of development, the soil was evaluated for phosphorus, organic matter, hydrogen potential, potassium,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquatic macrophytes; Ash; Jatobá-do-cerrado; Exposed subsoil; Savannah. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000300223 |
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| Rossi,Rafael Drumond; Martins,Carlos Romero; Viana,Pedro Lage; Rodrigues,Evandro Luís; Figueira,José Eugênio Côrtes. |
| In the Cerrado Biome of Brazil, African grasses constitute a serious problem, occurring in virtually all protected areas. Molasses grass (Melinis minutiflora P. Beauv.) accumulates more biomass than do most other species of the herbaceous stratum vegetation native to the Cerrado. In this study, our aim was to determine the impact of M. minutiflora on native vegetation, as well as (using simulations of fire traits) on the characteristics of fires, in invaded areas of the Serra do Rola-Moça State Park (Parque Estadual da Serra do Rola-Moça, PESRM), a protected area where fires are frequent, in the state of Minas Gerais, Brazil. Our main results are that M. minutiflora considerably increases the amount of biomass, becoming the main combustible plant in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cerrado; BehavePlus; Biological invasion; Fire intensity; Savannah. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000400018 |
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| Scrich,Vitória M.; Pônzio,Marcella C.; Pasqualotto,Nielson; Rodrigues,Thiago F.; Paolino,Roberta M.; Chiarello,Adriano G.. |
| Abstract: Coloration anomalies are mainly genetically-based disorders in which body pigmentation is either reduced (hypopigmentation) or produced in excess (melanism), in parts or the totality of the body. Cases of hypopigmentation have been documented in many neotropical mammals, including the tayra (Eira barbara Linnaeus, 1758). We expand the account of anomalous coloration occurrence presenting new registers of hypopigmented tayras in Brazil. Data was collected during a mammal survey carried out in three agricultural landscapes within the Cerrado domain in the northeast of the state of São Paulo. We obtained two kinds of records of hypopigmented tayras, one from direct sighting and the other from a camera-trap. We discuss the likely implications of this... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Anthropogenic matrix; Hypopigmentation; Leucism; Mustelid; Savannah; Sugarcane. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000300501 |
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| Albuquerque,J.A.A.; Evangelista,M.O.; Mates,A.P.K.; Alves,J.M.A.; Oliveira,N.T.; Sediyama,T.; Silva,A.A.. |
| A phyto-sociological survey is the first step to implement integrated weed management in crops. In this study, weed occurrence was evaluated in cassava plantations in the savannah of Roraima in northern Brazil. Harvest was performed randomly 80 times in 10 crops over four seasons (January, February, March, and April 2012). The harvested plants were cut at ground level, sorted out per species, identified, quantified, and weighed on a 0.01 g precision scale. A descriptive analysis was conducted of the phyto-sociological parameters (frequency, density, abundance, total number of individuals per species, relative frequency, relative density, relative abundance and importance value index) for the collected species. A description was also made of the botanical... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manihot esculenta Crantz; Weeds; Phytosocial study; Savannah; Morphological characteristics. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000100010 |
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| Ko,Kwang Hyun. |
| ABSTRACT This article aimed to review various theories of bipedalism and provide a holistic answer to human evolution. There have been two questions regarding bipedalism: i) why were the earliest hominins partially bipedal?, and ii) why did hominins become increasingly bipedal over the time and replaced their less bipedal ancestors? To answer these questions, the prominent theories in the field, such as the savanna-based theory, the postural feeding hypotheses, and the provisioning model, are collectively examined. Because biological evolution is not a simple causation; there may be multiple answers to the evolution of bipedalism. The postural feeding hypothesis (reaching for food/balancing) provides an explanation for the partial bipedalism of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Locomotion; Provisioning model; Bipedalism; Chimps; Savannah; Origins of Bipedalism. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000600929 |
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| Leão-Araújo,Érica Fernandes; Souza,Eli Regina Barboza de; Naves,Ronaldo Veloso; Peixoto,Nei. |
| Abstract Campomanesia adamantium is a fruit tree native to Cerrado and important for human consumption as food, herbal medicine and even in the beverage industry. The aim of this study was to evaluate the vegetative and reproductive phenology of C. adamantium plants in the region of Ipameri-GO, the synchronization of phenophases and the correlation with climatic data. Rainfall, relative humidity, average, maximum and minimum temperature, as well as sprouting, flowering and fruiting data of C. adamantium plants were collected between September and December of 2016 and 2017. Graphs were plotted for climatological data and phenological phases. Phenophase synchrony analysis and correlation of these phases with the climate of the region were performed.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flowering; Fructification; Gabiroba; Phenophases; Rainfall; Relative humidity; Savannah; Sprouting; Temperature. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000200203 |
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| Fonseca,Carlos Eduardo Lazarini da; Morais,Fernanda Monteiro de; Gonçalves,Helenice Moura; Aquino,Fabiana de Gois; Rocha,Fernando Souza. |
| Abstract: The objective of this work was to estimate the repeatability coefficients of mangaba (Hancornia speciosa) fruit traits, in order to define the number of fruit needed for an accurate selection of superior genotypes, as well as to conjecture about the nature of the phenotypic variation of these traits. Evaluations were performed for 160 fruit of 16 genotypes from two native H. speciosa populations of Goiás Velho and Padre Bernardo, in the state of Goiás, Brazil. Repeatability was estimated by the analysis of variance, principal component analyses based on covariance and on the correlation matrix, and structural analysis based on the correlation matrix. Repeatability estimates for fruit weight, diameter, and length, as well as seed number and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coefficient of determination; Mangaba; Repeated measures; Savannah; Selection efficiency. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000600710 |
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| Euclides,Valéria Pacheco Batista; Montagner,Denise Bataglin; Difante,Gelson dos Santos; Barbosa,Rodrigo Amorim; Fernandes,Wellington Souza. |
| Grazing strategy is a key element in the determination of sward structure, herbage nutritive value and animal performance. We aimed to compare the herbage characteristics and performance of livestock in pastures of Panicum maximum cv. Tanzania managed, using two rotational stocking strategies, which provided either a fixed-length rest period (FRP) of 35 days in the spring and fall and 30 days in the summer, or a variable-length rest period (VRP), determined by the time required for the canopy to achieve 70 cm in height. The pastures were evaluated in the pregrazing condition for forage mass (FM); leaf (LP), stem (SP) and dead matter (DP) percentages; and nutritive value (NV). The animals were weighed every 28 days. Pastures managed with the FRPs exhibited... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Panicum maximum; Canopy height; Nutritive value; Savannah; Stocking rate. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000600002 |
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| Odon,Anderson; Bordignon,Marcelo O.; Dornelles,Guilherme D. P.. |
| ABSTRACT Bats are the second largest order of mammals, with varying feeding habits and great ecological significance. Anthropization has several important effects on animal communities and the Brazilian Cerrado, a Neotropical savannah, has been severely affected by human activity. The objective of this study was to evaluate phyllostomid bat assemblage distributions in the different landscape formations of a modified savannah. Using mist nets, we performed 36 sampling nights between 2015 and 2016. The sampling effort was 23,328 m².h and was equally distributed over three landscape formations: a large fragment, riparian forest, and small fragments. We compared capture rates, richness, diversity, similarity, and feeding guilds for the three formations. We... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anthropization; Cerrado; Fragmentation; Savannah. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212019000100215 |
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| Marouelli,Waldir Aparecido; Abdalla,Rômulo P; Madeira,Nuno R; Silva,Henoque R da; Oliveira,Aureo S de. |
| The objective of the present study was to evaluate the effects of crop residue covers (0.0; 4.5; 9.0; 13.5 t ha-1 millet dry matter) on water use and production of onion cultivated in no-tillage planting system (NT) as compared to conventional tillage system (CT). The study was carried out at Embrapa Hortaliças, Brazil, under the typical Savanna biome. Irrigations were performed using a sprinkle irrigation system when soil-water tension reached between 25 and 30 kPa. The experimental design was randomized blocks with three replications. Total net water depth applied to NT treatment was 19% smaller than the CT treatment, however, water savings increased to 30% for the first 30 days following seedlings transplant. Crop biomass, bulb size and yield, and rate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium cepa L.; Reduced tillage; Water use efficiency; Irrigation; Savannah. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362010000100004 |
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| ALBUQUERQUE,J.A.A.; SANTOS,T.S.; CASTRO,T.S.; MELO,V.F.; ROCHA,P.R.R.. |
| ABSTRACT The goal of this study was to evaluate the occurrence of weeds after soybean harvest in rotational systems of no-till and conventional tillage in the savannah of Roraima, Brazil. Two simultaneous experiments were conducted in adjacent areas, the first one with no-till soil management system and the second one with the conventional system, with crop rotations for five agricultural years: pearlmillet (2007/2008), soybean (2008/2009), maize (2009/2010), cowpea with maize (2010/2011), soybean (2011/2012) and maize (2012/2013). The used experimental design was the randomized block one with 28 plots, sized 3 x 15 m (45 m2) distributed in 4 blocks. In May 2010, the combined sowing of cowpea and maize was performed, and later, during the same month of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Phytosociology; Weeds; Savannah; Morphological characteristics. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100238 |
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| Registros recuperados: 18 | |
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