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| Registros recuperados: 62 | |
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| Silva, Fábio Henrique; Universidade para o Desenvolvimento do Estado e da Região do Pantanal - UNIDERP; Favero, Silvio; Universidade para o Desenvolvimento do Estado e da Região do Pantanal - UNIDERP; Sabino, José; Universidade para o Desenvolvimento do Estado e da Região do Pantanal - UNIDERP. |
| This work aimed to study the structure of functional groups of entomofauna associated to aquatic macrophytes in Correntoso river, Rio Negro sub-region, Pantanal, Mato Grosso do Sul State, Brazil. Six samples were taken in different seasonal periods; ebb, dry and wet. The organisms were collected using D net (300 m mesh), sweeping five times through the roots of macrophyte banks at each sample session. Three environments were compared (open, intermediary, close) using data from six collection sites, through which were analyzed absolute abundance, observed richness of families and the sampled specimens were also separated in functional groups. A total of 60 families from 12 orders of Insecta were registered, totaling 19,773 sampled insects. The largest... |
| Tipo: Grupos funcionais tróficos |
Palavras-chave: Ecologia; Limnologia aquatic entomofauna; Feeding groups; Floodplain; Pantanal 2.05.00.00-9. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7822 |
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| Udom, Ikpe Jimmy; Nta, Samuel Akpan. |
| UPFLOW model was used to provide assessments of capillary rise into root zone soil moisture in shallow water table soils of Obio Akpa river floodplain using drum-culture lysimeters. Soil moisture depletion experiment was undertaken through the use of drums with bases intact and drums with bases removed and sunk in the field at different depths during the dry period with no rainfall and no irrigation. UPFLOW model was validated by comparing simulated capillary soil moisture values from a falling water table with gravimetrically observed data from 0 – 500, 500-1000 and, 1000-1500 mm water table depth in sandy loam and sandy clay soils. Simulated runs mimic the observed fluctuations and trend of capillary rise to the root zone. The statistical pointers of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: UPFLOW; Capillary rise; Shallow water table; Floodplain; Obio Akpa; Nigeria. |
| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5681 |
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| BAO,FRANCIELLI; LEANDRO,THALES D.; ROCHA,MAÍRA DA; SANTOS,VANESSA S. DOS; STEFANELLO,THIAGO H.; ARRUDA,RAFAEL; POTT,ARNILDO; DAMASCENO-JÚNIOR,GERALDO A.. |
| ABSTRACT The Brazilian Pantanal is an extensive wetland with heterogeneous habitats, primarily due to the river-floodplain system and plants with differential adaptations and reproductive strategies. Factors such as altitude, distance among plant formations, and flood pulse must be considered to better understand its diversity. Aiming to assess the influence of biogeographic patterns in this system, we analyzed the floristic composition of six areas along the Paraguay River, including residual relieves, verifying the pattern of similarity, and effects of distance and altitude. We recorded 356 species in 87 families, mostly perennial (75%), and some annuals (15%) and pluriannuals (5%). Herbaceous plants were the most represented (48%), followed by arboreal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biogeography; Floodplain; Floristics; Pantanal; Vegetation. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100085 |
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| NOVA,CLARICE C.; LOPES,VANESSA G.; SOUZA,LEONARDO COIMBRA E; KOZLOWSKY-SUZUKI,BETINA; PEREIRA,TALITA A.A.; BRANCO,CHRISTINA W.C.. |
| Rotifers have often been used as indicators of sudden changes in physical and chemical features of the aquatic environment. Such features vary greatly during flood pulse events in small lakes connected to major floodplains. However, few are the studies that investigate the consequences of the flood pulse in rotifer species composition, abundance, richness and diversity, especially in Amazonian lakes. We analyzed samples from a small blackwater lake of an “igarapé” connected permanently to the Negro river, in Central Amazonia. Samples were taken twice a year for two years, comprising flooding and receding periods of the flood pulse. Rotifer abundance increased significantly after draught events, and electrical conductivity and turbidity were intrinsically... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Floodplain; Flood pulse; “igarapé”; Rotifera; Zooplankton. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301359 |
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| Ramalho,Werther Pereira; Andrade,Murilo Sousa; Matos,Lucicléia Railene Assis de; Vieira,Lisandro Juno Soares. |
| Despite the historical knowledge on amphibians of the Purus River basin, basic information on assemblages is fragmented, with gaps in knowledge existing at various scales, which limits conservation strategies. This study provides information on the composition, richness and abundance of the amphibian fauna in varzea environments and floating meadows of the oxbow lakes of the Middle Purus River between the Boca do Acre and Pauiní municipalities, Amazonas, Brazil. We sampled six oxbow lakes using forty-seven 200-meter transects, distributed among the "floating meadows," "high varzea" and "low varzea," from April to January 2014. We recorded 59 species, with the family Hylidae being predominant. This amphibian fauna represents approximately 19% of the species... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon; Floodplain; Flood pulse; Diversity; Conservation. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000100201 |
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| Penczak,Tadeusz; Agostinho,Angelo A.; Hahn,Norma S.. |
| The frequency of nine food types in the guts of 58 fish species from the Paraná River and its floodplain was compared using similarity definition. A synthetic table ordered on the basis of this definition, with fish species on axis y, and food types on axis x, enabled easy reading numerous kinds of information on feeding ecology of fish in the catchment. For example: 1) which fish species were generalists, specialists or opportunists, 2) those classified as herbivorous species consumed small amounts of animal food, 3) that fish consumed any food type that contained transformed solar energy and matter, 4) what are food preferences dependent on fish taxonomic affinity. The possibility of employing synthetic tables for investigating spatial and temporal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Paraná River; Floodplain; Fish; Feeding; Similarity definition; Synthetic table. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000100013 |
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| Campos,João Batista. |
| The process of land occupation by the state of Paraná practically decimated its forests. Presently, only 7% from a total area of 83.41% is covered by forests. Most of them are now concentrated in the "Serra do Mar" and in the Iguaçu National Park. With regard to forest cover the most critical region is situated in the northwestern of the state with less than 1% of its area covered by forest. This restricted area mainly consists of conservation units and the islands of the high Paraná River floodplain. The present study consists of a spatial and multi-temporal analysis of deforestation and the quantification of the remnant forests on Porto Rico island (22º45'S; 53º15'W), which have their occupation history linked to the colonization process of the region.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Photogrammetry; Alluvial forest; Floodplain; Forest. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000100013 |
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| Rodrigues,Luzia Cleide; Train,Sueli; Roberto,Maria do Carmo; Pagioro,Thomaz Aurélio. |
| Temporal variations of some limnological variables in limnetic and littoral regions of Patos lagoon, a "várzea" lake on the floodplain of the Upper Paraná River (22(0) 43'12"S e 53(0) 17'37"W), were studied in relation to hydrological and climatological factors. Measurements of water temperature, euphotic zone, suspended material, electrical conductivity, total alkalinity, pH, dissolved oxygen, carbon dioxide, total nitrogen, total Kjeldahl nitrogen, total phosphorus, dissolved phosphorus, reactive soluble phosphorus and chlorophyll a were taken monthly between March 1993 and February 1994. Results lend evidence to the importance of the hydrological regime on the dynamic of limnological variables in floodplain lakes. A dilution of nutrients in the lagoon,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Limnological variables; Flood pulse; Floodplain; Paraná River; Connectivity; Nutrients. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000600014 |
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| Lopes,Célia de Almeida; Faria,Anna Christina Esper Amaro de; Manetta,Gislaine Iachstel; Benedito-Cecilio,Evanilde. |
| The aim of this work was to determine the caloric density of leaves, stems and roots of aquatic macrophytes in different environments of the Baía subsystem (Baía river and Fechada and Guaraná lagoons) on the Upper Paraná river floodplain, in addition to identify the variability between ecological groups. Samplings of Eichhornia crassipes, Salvinia spp, Pistia stratiotes, Eichhornia azurea, Polygonum sp, Cyperaceae and Poaceae were carried out in February 2003. Spatial differences in the caloric densities were not observed for these plants. Caloric density values varied from 1906.9 cal/g dry weight (root) to 4675.0 cal/g dry weight (leaf). However, significant differences between the caloric content averages of the vegetative structures were observed only... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Paraná river; Floodplain; Aquatic macrophytes; Calorimetry. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000600018 |
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| Gimenes,Márcio Rodrigo; Anjos,Luiz dos. |
| The aim of this study was to analyze the seasonal variations in habitat selection and abundance of Ciconiiformes species in four foraging habitats (rivers, channels, connected and disconnected lagoons) on the upper Paraná River floodplain, Brazil, and to conduct the surveys of wading birds in 2002 and 2003. The largest number of species and highest abundances of most species were observed in the connected lagoons. Snowy Egrets (Egretta thula), Wood Storks (Mycteria americana), Roseate Spoonbills (Platalea ajaja), and Jabirus (Jabiru mycteria) frequently used connected lagoons (habitat with the highest fish abundance) and abandoned the areas during floods, suggesting that they were able to find high quality patches for foraging. Cocoi Herons (Ardea cocoi),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wading birds; Ciconiiformes; Prey availability; Floodplain; Paraná river. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000200025 |
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| PAGIORO,T. A.; THOMAZ,S. M.. |
| Leaf packs of the aquatic macrophyte Eichhornia azurea were used to experimentally evaluate changes in mass, carbon, nitrogen, and phosphorus concentrations, and C:N ratios during initial stages of decomposition in two different environments, the Paraná River and Garças Lake. Analysis of weight loss showed relatively slow decomposition rates in both environments (0.0047 d-1 and 0.0048 d-1 respectively). Over a 45-day period we observed significant changes (p < 0.05) in concentrations of carbon, nitrogen, and phosphorus, but only carbon differed between the environments (F = 10.479; p = 0.03). Therefore we concluded that detritus behaved similarly during decomposition, since intrinsic characteristics of the environments affected only the carbon... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eichhornia azurea; Decomposition; Floodplain; Paraná river. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081998000400007 |
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| THOMAZ,S. M.; PEREIRA,G.; PAGIORO,T. A.. |
| Four size fractions of the sediment of six environments of the upper Paraná River floodplain were analyzed for carbon, nitrogen, and phosphorus contents and microbial respiration (oxygen consumption). Particle size did not affect nitrogen and phosphorus content or microbial activity, but did affect carbon content (F = 4.274, df = 3; 20, p = 0.020). The carbon concentration of ultra-fine particles was significantly lower than that of other sizes of sediment particles. Microbial respiration values were well predicted by sediment chemical composition, as shown by multiple regression (microbial respiration = -0.39 - 0.210C + 0.108N + 0.796P; F = 7.0495, p = 0.0022). However, phosphorus was the element which best explained the microbial respiration (partial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microbial respiration; Nutrient cycling; Floodplain; Sediment fractions; Paraná River. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000200010 |
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| Registros recuperados: 62 | |
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