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Registros recuperados: 64
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A closer look at the main actors of Neotropical floodplain food webs: functional classification and niche overlap of dominant benthic invertebrates in a floodplain lake of Paraná River Iheringia, Sér. Zool.
Saigo,Miguel; Marchese,Mercedes; Wantzen,Karl Matthias.
ABSTRACT Functional classification of animals is necessary to enhance the predictive power of food web models. However, while there is a large database for functional classification of benthic invertebrates (Functional Feeding Groups, FFG) in the temperate zone, the attribution of individual species of riverine invertebrates is still in its infancies in the Neotropical Region. Different authors hypothesized that diet breadth was larger in the Tropics, however detailed analysis are scarce. In the present study we aimed at classifying dominant benthic taxa of the Middle Paraná River floodplain (Argentina) into trophic guilds by diet and niche overlap analyses. We sampled twelve taxa of benthic invertebrates from a floodplain lake during low water season and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: KEYWORDS; Diet; Floodplain; Null models; Feeding habits; Paraná River.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100204
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Abundance and composition of Rotifera in an abandoned meander lake (Lago Amapá) in Rio Branco, Acre, Brazil Zoologia
Keppeler,Erlei Cassiano; Hardy,Elsa Rodrigues.
The rotifer community in Lago Amapá (abandoned meander lake of the Rio Acre floodplain) was investigated with respect to seasonal changes. Sampling was performed at three collection stations, generally weekly, during the dry season between May 8, 1997 and October 31, 1997, and during the rainy season between January 2, 1998 and February 24, 1998. The density and composition of rotifer species (48 taxons of rotifers) were determined, and their diversity and abundance were observed to be greater, respectively, at high-water and low-water. Anova was performed, by means of the F test, to test for seasonal differences in environmental variables and rotifers, showing that there was a highly statistically significant difference for pH and transparency (p <...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Floodplain; High water phase; Low water phase; Rotifera community.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000200011
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Abundance of cladocerans in the littoral regions of two environments of the Upper Paraná River floodplain, Mato Grosso do Sul, Brazil BJB
ROSSA,D. C.; LANSAC-TÔHA,F. A.; BONECKER,C. C.; VELHO,L. F. M..
The abundance of cladocerans recorded in plankton samples from the littoral regions of two enviroments (Baía River and Guaraná lake), the Upper Paraná River floodplain and some limnological variables important in controlling their abundance were investigated at three sites in the lake and two in the river, from March/93 to January/94. Abundance was highest in the lake, chiefly during high water. Bosminidae dominated in both environments and hydrological periods (high and low water). Chydoridae were more important in the lake, and Sididae in the river. A higher number of Pearson's correlations significative (p < 0.03) between the densities of the ten most important species and the limnological variables was observed in the river. This suggests that...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cladocerans; Littoral; Floodplain; Tropical.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000100007
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Alimentacao de peixes carnivoros da planicie inundavel do Rio Miranda, Pantanal, Mato Grosso do Sul, Brasil. Infoteca-e
RESENDE, E.K. de; PEREIRA, R.A.C.; ALMEIDA, V.L.L. de; SILVA, A.G. da..
E analisada a alimentacao de 15 especies de peixes carnivoros de quatro ambientes na planicie de inundacao do baixo rio Miranda, na regiao do Pantanal de Mato Grosso do Sul. Estas especies carnivoras sao generalistas e se alimentam de peixes e outras presas que estejam disponiveis no ambiente, como camaroes, na Baia Cinza. Meandros abandonados, vazantes e baias constituem lares de alimentacao de especies carnivoras de pequeno porte, bem como de formas jovens de grande porte.
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Peixe carnivoro; Alimentacao; Rio Miranda; Pantanal; Carnivorous fishes; Feeding; Floodplain; Fish; Food; Miranda river.
Ano: 1996 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/789740
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Amphibians of varzea environments and floating meadows of the oxbow lakes of the Middle Purus River, Amazonas, Brazil Biota Neotropica
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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An ordination technique for fish diet comparisons BABT
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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Arboreous vegetation of an alluvial riparian forest and their soil relations: Porto Rico island, Paraná river, Brazil BABT
Campos,João Batista; Souza,Maria Conceição de.
The dynamics of alluvial deposits in floodplains forms islands and sandbanks. Deposits frequently accumulate at the river margins and on islands with consequent side growths. One of these sandbanks which started to form in 1952 annexed an area of 12.4ha to the Porto Rico island (53º15’W and 22º45’S). At present a forest fragment of approximately 2.0 ha exists in this place. The structural analysis of arboreous vegetation of this fragment showed a floristic gradient related to the physical and chemical variations of the substratum. High density of pioneer species associated to the absence of recruitment of new individuals of these and other successional categories indicated that the forest was impaired in its succession process. This fact could be...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alluvial forest; Floodplain; Forest structure; Phytosociology; Riparian vegetation; Succession.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000200004
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Assessing the Resilience of a River Management Regime: Informal Learning in a Shadow Network in the Tisza River Basin Ecology and Society
Sendzimir, Jan; IIASA; sendzim@iiasa.ac.at; Magnuszewski, Piotr; IIASA; Wroclaw University of Technology; piotr.magnuszewski@pwr.wroc.pl; Flachner, Zsuzsanna; Research Institute for Soil Science and Agricultural Chemistry of Hungarian Academy of Sciences; flachner@rissac.hu; Molnar, Geza; Bokartis; bokartis@enternet.hu; Nagy, Zsuzsanna; Corvinus University of Budapest; zsuzsanna.nagy14@uni-corvinus.hu.
Tipo: Peer-Reviewed Reports Palavras-chave: Flooding; Floodplain; Regime shift; Resilience; Tisza River; Transformability..
Ano: 2008
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Bacterioplankton features and its relations with doc characteristics and other limnological variables in Paraná river floodplain environments (PR/MS-Brazil) BJM
Teixeira,Mariana Carolina; Santana,Natália Fernanda; Azevedo,Júlio César Rodrigues de; Pagioro,Thomaz Aurélio.
Since the introduction of the Microbial Loop concept, many studies aimed to explain the role of bacterioplankton and dissolved organic carbon (DOC) in aquatic ecosystems. Paraná River floodplain system is a very complex environment where these subjects were little explored. The aim of this work was to characterize bacterial community in terms of density, biomass and biovolume in some water bodies of this floodplain and to verify its temporal variation and its relation with some limnological variables, including some indicators of DOC quality, obtained through Ultraviolet-visible (UV-VIS) and fluorescence spectroscopic analysis. Bacterial density, biomass and biovolume are similar to those from other freshwater environments and both density and biomass were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: DOC; Spectroscopy; Bacterioplankton; Floodplain.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000300008
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Caloric density of aquatic macrophytes in different environments of the Baía river subsystem, upper Paraná river floodplain, Brazil BABT
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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Caloric density of Loricariichthys platymetopon (Osteichthyes, Loricariidae) in the Upper Paraná River floodplain, Brazil BABT
Garcia,Daniela Aparecida; Benedito,Evanilde; Takeda,Alice Michiyo.
This study analyzed the muscle energy content (caloric density) of L. platymetopon captured at different sites of the Upper Paraná River floodplain, and potential relationships between the content and various environmental variables (water temperature, oxygen dissolved in water, food availability, relative numeric abundance) and biological variables (body size and reproductive cycle). Quarterly samplings from September 2006 to June 2007 in the lakes and rivers resulted in a sample of 739 specimens, whose muscle caloric density was determined using a calorimeter. Differences between the caloric averages of the males and females and among the different stages of gonadal development were not significant. Caloric density varied over time and space, with two...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Energy; Detritivorous fish; Direct calorimetry; Muscle; Floodplain.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000500015
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Composition and species richness of flagellate protozoa from environments associated to the Baía river (Mato Grosso do Sul State, Brazil): influence of the hydrological period and the connectivity - doi: 10.4025/actascibiolsci.v32i4.6307 Biological Sciences
Camargo, Janielly Carvalho; Universidade Estadual de Maringá; Velho, Luiz Felipe Machado; Universidade Estadual de Maringá.
Despite flagellate protozoa are important for the metabolism of aquatic ecosystems, researches about the ecology of this community is scarce. Therefore, this study investigated the influence of flood regime and hydrological connectivity on the patterns of composition and species richness of protozoan flagellates from aquatic environments in the upper Paraná river floodplain. To this end, samplings were undertaken in two periods of the hydrological cycle (March 2008 and September 2008), at six lentic environments associated with the Baía river (three are connected to the river, and three are isolated). 120 taxa were identified in the studied area, distributed in 10 orders and one residual group. This high species richness was sustained by the order...
Palavras-chave: 2.05.00.00-9 Protozooplankton; Faunistic inventory; Floodplain Protozooplankton; Faunistic inventory; Floodplain.
Ano: 2010 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/6307
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Conservation status and bio-ecology of Brycon orbignyanus (Characiformes: Bryconidae), an endemic fish species from the Paraná River basin (Brazil) threatened with extinction Neotropical Ichthyology
Tonella,Lívia Helena; Dias,Rosa Maria; Vitorino Junior,Oscar Barroso; Fugi,Rosemara; Agostinho,Angelo Antonio.
ABSTRACT Brycon orbignyanus is an endemic species from La Plata basin whose stocks have been presenting significant reductions throughout the Paraná River. Brycon orbignyanus is categorized as an endangered species. This study evaluated aspects of the bio-ecology of this species that may be related to this threat, highlighting its distribution, abundance, and diet as well as the corresponding relationships between its recruitment and flood regimes. Data were obtained from different parts of the upper Paraná River (stretches free and regulated by dams) from 1986 to 2010 with more detailed data collected from the free remnant of this basin. The results indicate that no records for species exist at more than half of the sampling points located in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dam; Diet; Floodplain; Ontogeny; Recruitment.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000300207
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Copepod (Crustacea) distribution in the freshwater and hyposaline lakes of the Pantanal of Nhecolandia (Mato Grosso do Sul, Brazil). Repositório Alice
SILVA, W. M.; ROCHE, K. F.; EILERS, V.; OLIVEIRA, M. D. de.
Eighteen freshwater and hyposaline lakes of the Nhecolândia floodplain were sampled in two periods, April/03 (beginning of dry period) and March/04 (end of wet period). Dezoito lagoas de água doce e de água hiposalina do Pantanal da Nhecolândia foram amostrados em dois períodos, abril/03 (início da seca) e março/04(fim da cheia).
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Floodplain; Limnology; Copepoda; Planície de inundação; Pantanal; Limnologia.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/792684
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Dendroecologia de Gymnanthes klotzschiana Müll. Arg. em um remanescente de Floresta Ombrófila Mista Aluvial no Sul do Brasil. Repositório Alice
LONGHI-SANTOS, T.; GALVÃO, F.; BOTOSSO, P. C.; MARTINS, K. G..
Em um remanescente de Floresta Ombrófila Mista Aluvial, foram abatidas 56 árvores adultas de Gymnanthes klotzschiana, árvore típica e representativa desta formação e popularmente conhecida como branquilho, às margens do rio Barigui, em Araucária - PR, o qual teve o curso de seu leito retificado na década de 1960. Considerando-se as técnicas e premissas básicas para estudos dendrocronológicos, os discos foram secos, polidos e os anéis de crescimento identificados e demarcados, para a construção de séries cronológicas e sua correlação com variáveis climáticas/ambientais. O presente trabalho tem por objetivo verificar se: (i) Gymnanthes klotzschiana apresenta características potenciais para estudos dendroecológicos; (ii) a espécie responde a estímulos...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Gymnanthes klotzschiana; Dendroecologia; Anéis de crescimento; Respostas ambientais; Intervenções antrópicas; Planície de inundação; Dendroecology; Tree rings; Environmental responses; Anthropogenic disturbances; Floodplain.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112641
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Distribuição da entomofauna associada às macrófitas aquáticas na vazante do rio Correntoso, Pantanal do Negro, Estado do Mato Grosso do Sul, Brasil - DOI: 10.4025/actascibiolsci.v31i2.1182 Biological Sciences
Silva, Fábio Henrique; UNIDERP; Favero, Silvio; UNIDERP; Sabino, José; UNIDERP; Garnés, Silvio Jacks dos Anjos; UIDERP.
Este trabalho teve como objetivo pesquisar a distribuição de insetos associados a macrófitas aquáticas e a similaridade dos sítios de coleta, no período de vazante, em um trecho do rio Correntoso, Pantanal do Negro, Estado do Mato Grosso do Sul, Brasil. Os sítios de coleta foram determinados conforme a mudança na estrutura da formação ripária, caracterizados como abertos com comunicação com campos inundáveis; intermediários sem comunicação com campos inundáveis; fechados sem comunicação com campos inundáveis. Foram realizadas três coletas durante o período de vazante, em seis sítios de coletas. Os organismos foram coletados utilizando rede D com malha de 300 &microm e esforço amostral de cinco lances de rede em raízes de macrófitas aquáticas. Foi...
Palavras-chave: 2.00.00.00-6 Ciências Biológicas entomofauna aquática; Pantanal; Planície de inundação 2.05.00.00-9 aquatic entomofauna; Pantanal; Floodplain.
Ano: 2009 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1182
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Distribuição espacial e temporal das larvas de Chironomidae em diferentes ambientes do complexo - rio Baía, Estado do Mato Grosso do Sul, Brasil - doi: 10.4025/actascibiolsci.v33i4.5386 Biological Sciences
Anjos, Adriana Felix dos; UEM; Takeda, Alice Michiyo; UEM; Pinha, Gisele Daiane; UEM.
A planície de inundação do alto rio Paraná caracteriza-se pela grande diversidade de organismos aquáticos e as larvas de Chironomidae destacam-se por sua elevada abundância. A partir da hipótese de que as variáveis abióticas influenciam a composição, densidade e dominância das larvas de Chironomidae em diferentes ambientes e períodos amostrados, este trabalho objetivou: caracterizar o rio Baía, canal secundário, lagoa não-conectada (Fechada) e lagoa conectada (Guaraná) da planície de inundação do alto rio Paraná, de acordo com os atributos da assembléia de Chironomidae e identificar possíveis gradientes de distribuição espacial e temporal das larvas, relacionando-as com algumas variáveis abióticas. As coletas foram realizadas no período de março de 2003 a...
Palavras-chave: Insetos aquáticos; Dominância; Composição granulométrica; Planície de inundação; Rio Paraná 2.05.00.00-9 aquatic insects; Dominance; Granulometric composition; Floodplain; Paraná river.
Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5386
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Effects of extended absence of flooding on the fish assemblages of three floodplain lagoons in the middle São Francisco River, Brazil Neotropical Ichthyology
Pompeu,Paulo dos Santos; Godinho,Hugo Pereira.
In the Neotropics, a large proportion of fish communities of large rivers use floodplain as habitats for feeding, reproduction, and refuge. An evaluation was made of the effects of extended dry periods on the species richness, abundance and local extinction of fish species in three marginal lagoons in the middle São Francisco River, southeastern Brazil. The studied lagoons fail to receive river floods during the study period (1994-1996). A gradual reduction in richness and abundance was observed in all lagoons. Migratory fish species had the highest probability to become extinct in the two lagoons that remained with large water volume. Species tolerant to low levels of dissolved oxygen had the lowest probability of local extinction in the lagoon showing an...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Floodplain; Migratory fish; Extended drought; Hypoxia.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000400006
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Factors determining the structure of fish assemblages in an Amazonian river near to oil and gas exploration areas in the Amazon basin (Brazil): establishing the baseline for environmental evaluation Rev. Bras. Zool.
Costa,Igor David; Freitas,Carlos Edwar de Carvalho.
ABSTRACT Determining the significance of biotic and abiotic factors in the structuring of fish assemblages in freshwater environments is an important question in ecology, particularly in view of environmental changes caused by man. In this paper we sought to identify the factors responsible for the composition and abundance of fish species collected with gill nets in six locations near ports in forest clearance areas opened up for oil and natural gas exploration (Petrobras Pedro Moura Base) in the Urucu River, during drought and flood cycles. In all, 923 individuals from 23 families and 82 species were collected, totalling a biomass of 182,244 g. The most abundant species during the flood season were Bryconops alburnoides (Kner, 1858) and Dianema...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Abiotic; Floodplain; Biological organization; Hydrocarbons.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000500351
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Fish assemblages of tropical floodplain lagoons: exploring the role of connectivity in a dry year Neotropical Ichthyology
Petry,Ana Cristina; Agostinho,Angelo Antonio; Gomes,Luiz Carlos.
Irregular rainfall and pronounced reductions of the hydrometric level in the year 2000 resulted in drastically altered hydrological connectivity of lentic environments in the upper Paraná River floodplain. The objective of the present work was to examine spatial and temporal patterns of fish assemblage attributes and structure in relation to limnological variables associated with hydrological connectivity. Fish were collected quarterly by seining in the marginal areas of 15 lagoons belonging to two biotopic categories (connected and disconnected). Variation in assemblage composition reflected the degree of hydrological connectivity. Values of assemblage attributes (species richness, density and biomass) were significantly lower in connected lagoons than in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Neotropical fishes; Fish assemblage structure; Hydrological connectivity; Floodplain.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252003000200005
Registros recuperados: 64
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