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	Provedor de dados Acta Amazonica (2) Autor BERNARDE,Paulo Sérgio (2) ANJOS,Luiz dos (1) COLOMBINI,Mônica (1) KOKUBUM,Marcelo Nogueira de Carvalho (1) MACHADO,Reginaldo Assêncio (1) MONTEIRO,Wuelton Marcelo (1) MOURA-DA-SILVA,Ana Maria (1) SILVA,Ageane Mota da (1) SOUZA,Rodrigo Medeiros de (1) Mais... Palavra-chave Acre (1) Amazônia (1) Anfíbios anuros (1) Bothrops atrox (1) Envenoming (1) Enzyme immunoassay (1) Habitats (1) Snakes (1) Venomous animals (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2020 (1) 1999 (1) País Brazil (2) Idioma Inglês (1) Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 414 Primeira ... 2 3 4 5 6 7 8 9 10 ... Última Comunidade de Odonata (Insecta) em áreas naturais de Cerrado e monocultura no nordeste do Estado de São Paulo, Brasil: relação entre o uso do solo e a riqueza faunística Zoologia Ferreira-Peruquetti,Patrícia S.; Fonseca-Gessner,Alaíde A.. Stream ecosystems may be strongly influenced in different ways by land use. The effects of land-cover patterns on Odonata community were studied in eight streams and seven lakes-dams of northeastern São Paulo State. The pattern analyzed was monoculture (sugar cane) vs. nature reserve in terms of Odonata species richness and similarity. Eighty-five Odonata species were sampled. The species richness was higher in the monoculture (33 species) than nature reserve (30 species) and 22 species were common to both areas. There was not verified relationship between land use and physical or chemical characteristics of the streams or lakes-dams water. These results suggest that some Odonata species are benefited and other affected by anthropogenic actions, although... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado; Diversity; Land use; Odonata; Species richness. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000200008 Continental ichthyofauna from the Paraíba do Norte River basin pre-transposition of the São Francisco River, Northeastern Brazil Biota Neotropica Ramos,Telton Pedro Anselmo; Lima,Jéssica Alcoforado de Sena; Costa,Silvia Yasmin Lustosa; Silva,Márcio Joaquim da; Avellar,Raizze da Costa; Oliveira-Silva,Leonardo. Abstract: Freshwater ichthyofauna from Brazil Northeast region was considered as being poorly known until recent years, with a considerable number of publications becoming available in the last decade. The present study provides an inventory of freshwater fish species from the Paraíba do Norte River basin located in Paraíba State, Brazil. This inventory is intended to contribute to the of knowledge to the regional fish diversity, pre-transposition of the São Francisco River. Collecting data was obtained from ichthyological databases of both national and foreign institutions. A total of 47 freshwater fish species are registered within the Paraíba do Norte River basin, represented by 38 genera, 20 families and six orders. Characiformes, comprising 47% (22... Tipo: Info:eu-repo/semantics/article Palavras-chave: Freshwater fishes; Neotropical Region; Diversity; Identification key. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000400207 Convergence in the variation of local and regional galling species richness Neotropical Entomology Carneiro,Marco A.A.; Fernandes,G.W.; De Souza,O.F.F.. We investigate the local and regional determinants of galling insect richness on the dioecious shrub Baccharis concinna Barroso (Asteraceae) in the southeastern portion of the Espinhaço Mountains in Brazil. The total number of galling species and the richness of galling Cecidomyiidae (Diptera) were influenced by plant gender. Male plants supported a higher richness of galling insects than female plants, supporting the hypothesis of sex-biased herbivory at the community level. The total number of galling species and the richness of galling cecidomyiids showed a peak at intermediate altitudes. The richness of all galling species and galling cecidomyiids were strongly influenced by habitat. Plants in xeric habitats supported more galling species than plants... Tipo: Info:eu-repo/semantics/article Palavras-chave: Altitudinal gradient; Baccharis concinna; Diversity; Ecological community; Herbivore. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000400003 Copepods, hydromedusae and siphonophores: Diversity and distribution in the Gerlache Strait, Antarctic Peninsula Boletín de Investigaciones Dorado-Roncancio,Edgar Fernando; Cedeño-Posso,Cristina. ABSTRACT Project Biodiversity and oceanographic conditions of the strait of Gerlache “Biogerlache-Antarctica”, aims to carry out the characterization of the Antarctic fauna of the strait, generating new contributions to the biological inventories of Antarctica. Present work focuses on the biodiversity of the zooplanktonic community, specifically on copepods, hydromedusae and siphonophorae collected during the III Antarctic Expedition of Colombia “Admiral Padilla” (2016-2017). Sampling was carried out in seven oceanographic stations located along the Gerlache strait, with vertical trawls between the maximum depth of the station and the surface. 4100 organisms belonging to 38 species of the phylum Arthropoda (Orders Calanoid and Cyclopoid) and 10 species of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Antarctic Ocean; Zooplankton; Diversity; Metridia gerlachei; Dimophyes arctica. Ano: 2021 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612021000300169 Coprophilous fungi from Brazil BABT Richardson,Michael J.. Thirty-two species of coprophilous fungi were recorded from seven dung samples collected from the state of Matto Grosso do Sul, Brazil, and incubated in moist chambers. Descriptions of some of the more interesting fungi are given, and aspects of their biodiversity and ecology are discussed. Tipo: Info:eu-repo/semantics/article Palavras-chave: Ascomycetes; Coprophilous fungi; Diversity; Species richness. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000300010 Corona development and floral nectaries of Asclepiadeae (Asclepiadoideae, Apocynaceae) Acta Botanica Monteiro,Mariana Maciel; Demarco,Diego. ABSTRACT Flowers of Asclepiadoideae are notable for possessing numerous nectaries and elaborate coronas, where nectar can accumulate but is not necessarily produced. Given the complexity and importance of these structures for reproduction, this study aimed to analyze the ontogeny of the corona, the structure and position of nectaries and the histochemistry of the nectar of species of Asclepiadeae. Two types of coronas were observed: androecial [C(is)] and corolline (Ca). The development of the C(is)-type of corona initiates opposite the stamens in all species examined with the exception of Matelea in which it begins to develop as a ring around the filament tube. Despite their morphological variation, coronas typically originate from the androecium. A... Tipo: Info:eu-repo/semantics/article Palavras-chave: Asclepiads; Histochemistry; Ontogeny; Nectar; Structural; Diversity. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000300420 ‘Cort short on a mountaintop’ – Eight new species of sequestrate Cortinarius from sub-alpine Australia and affinities to sections within the genus Naturalis Danks, M.; Lebel, T.; Vernes, K.. During the course of research on mammal mycophagy and movement in the Northern Tablelands of New South Wales, Australia, extensive collections of sequestrate fungi were made, including numerous cortinarioid taxa. Historically any novel taxa would have been described in the cortinarioid sequestrate genera Descomyces, Hymenogaster, Protoglossum, Quadrispora, Thaxterogaster or Timgrovea based on broad morphological similarities of the sporocarps and spore ornamentation. However, consistent with other recent analyses of nuclear DNA regions, taxa from sequestrate genera were found to have affinities with Cortinarius and Descolea or Hebeloma, and to be scattered across many sections within Cortinarius. None of the historical sequestrate cortinarioid genera are... Tipo: Article / Letter to the editor Palavras-chave: Diversity; Systematics; Taxonomy; Thaxterogaster. Ano: 2010 URL: http://www.repository.naturalis.nl/record/531690 Cross-scale determinants of palm species distribution Acta Amazonica Salm,Rodolfo; Salles,Nilson Vicente de; Alonso,Wladimir J.; Schuck-Paim,Cynthia. We investigate palm species distribution, richness and abundance along the Mokoti, a seasonally-dry river of southeastern Amazon and compare it to the patterns observed at a large scale, comprising the entire Brazilian territory. A total of 694 palms belonging to 10 species were sampled at the Mokoti River basin. Although the species showed diverse distribution patterns, we found that local palm abundance, richness and tree basal area were significantly higher from the hills to the bottomlands of the study region, revealing a positive association of these measures with moisture. The analyses at the larger spatial scale also showed a strong influence of vapor pressure (a measure of moisture content of the air, in turn modulated by temperature) and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon; Diversity; Moisture; Palms; Tropical forests. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672007000100002 Culturable mycobiota from Karst caves in China, with descriptions of 20 new species Naturalis Zhang, Z.F.; Liu, F.; Zhou,, X.; Liu, X.Z.; Liu, S.J.; Cai, L.. Karst caves are distinctly characterised by darkness, low to moderate temperatures, high humidity, and scarcity of organic matter. During the years of 2014–2015, we explored the mycobiota in two unnamed Karst caves in Guizhou province, China, and obtained 563 fungal strains via the dilution plate method. Preliminary ITS analyses of these strains suggested that they belonged to 246 species in 116 genera, while 23.5 % were not identified to species level. Among these species, 85.8 % (211 species) belonged to Ascomycota; 7.3 % (18 species) belonged to Basidiomycota; 6.9 % (17 species) belonged to Mucoromycotina. The majority of these species have been previously known from other environments, mostly from plants or animals as pathogens, endophytes or via a... Tipo: Article / Letter to the editor Palavras-chave: Diversity; ITS DNA barcodes; Morphology; Systematics; Troglobitic fungi. Ano: 2017 URL: http://www.repository.naturalis.nl/record/629939 Cyanobacterial populations that build 'kopara' microbial mats in Rangiroa, Tuamotu Archipelago, French Polynesia ArchiMer Richert, Laurent; Golubic, Stjepko; Le Guedes, Roland; Herve, Annie; Payr, Claude. Cyanobacterial populations, the primary producers and builders of 'kopara' microbial mats were studied in four selected ponds along the rim of the Rangiroa Atoll, French Polynesia using a polyphasic approach. Seven isolates were maintained in uni-cyanobacterial cultures, characterized morphotypically and phylogenetically by evaluating sequences of the 16S rRNA gene of about 620 base pairs in length. Cyanobacteria in natural populations were analyzed microscopically, characterized morphotypically, and compared with cultured strains. Three of the isolates were identified in the field samples: Lyngbya aestuarii, Johannesbaptistia pellucida and Chroococcus submarinus were present in the mats only as minor components, whereas the species of Schizothrix that... Tipo: Text Palavras-chave: 16S rRNA; Polyphasic approach; Phylogeny; Microbial mats; Microbial ecology; Kopara; Diversity; Cyanobacteria; Culture. Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-2050.PDF Deep-sea nematode assemblage has not recovered 26 years after experimental mining of polymetallic nodules (Clarion-Clipperton Fracture Zone, Tropical Eastern Pacific) ArchiMer Miljutin, Dmitry M.; Miljutina, Maria A.; Arbizu, Pedro Martinez; Galeron, Joelle. We investigated nematode assemblages inhabiting the 26-year-old track created by experimental deep-sea mining of polymetallic nodules, and two adjacent, undisturbed sites, one with nodules and one without nodules. The aim was to compare density, assemblage structure, and diversity indices in order to assess the process of recovery of the nematode assemblage inhabiting the disturbed site. This experimental dredging was conducted in 1978 by the Ocean Minerals Company (USA) in the area of a French mining claim in the Clarion-Clipperton Fracture Zone (Tropical Eastern Pacific) at a depth of about 5000 m. The nematode assemblage had not returned its initial state 26 years after the experimental dredging: the total nematode density and biomass within the... Tipo: Text Palavras-chave: Body volume; Deep-sea; Density; Disturbance; Diversity; Dredging; Mining; Nematode; Nodule; Recolonization; Recovery. Ano: 2011 URL: http://archimer.ifremer.fr/doc/00047/15867/13321.pdf Denied density-dependent seedling recruitment in a fragmented forest does not decrease seedling diversity RChHN VALDIVIA,CARLOS E; SIMONETTI,JAVIER A. Negative density-dependent relationships in plant communities are currently claimed as an important mechanism for the maintenance of plant diversity. However, anthropogenic perturbations such as forest fragmentation might modify such relationships. We evaluated density-dependent relationships between seed and seedling abundance of a tree assemblage in a fragmented forest for estimating seed-to-seedling transitions and their effects on seedling richness. In continuous forest, two out of four and one out of four species presented significant or a tendency to exhibit negative seedling recruitment which is in agreement with other temperate and tropical forests. In forest fragments (1-6 ha), however, this relationship was uncoupled. Seedling richness and... Tipo: Journal article Palavras-chave: Density-dependent recruitment; Diversity; Forest fragmentation; Seedlings; Seeds. Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000200012 Desarrollo de un índice de integridad biológica avifáunico para los humedales de la reserva de la biosfera pantanosa de Centla, Tabasco Colegio de Postgraduados Córdova Avalos, Antonio. Se evaluó la salud de los Pantanos de Centla, Tabasco, mediante un índice de integridad biológica (IBI) utilizando a las aves como indicadoras. Se seleccionaron sitios de manglar y popal-tular con diferente grado de perturbación (conservado, semiconservado y perturbado). Un análisis de cambio de cobertura con imágenes de satélites Landsat MSS 1976 y ETM 2002 mostró pérdidas de cobertura de manglar de 21─31 % y tasas de deforestación anual de 0.8 ─ 1.2 %. El registro histórico de especies de aves fue de 328, detectándose 189 en este estudio, de las cuales 13 fueron nuevos registros para la Reserva. Se encontraron diferencias significativas en el número de especies entre sitios (α=0.05). De acuerdo con el estimador de cobertura basado en abundancias,... Tipo: Tesis Palavras-chave: Aves; Integridad biológica; Diversidad; Calidad del agua; Humedales; Aves; Integridad biológica; Diversidad; Calidad del agua; Humedales; BIrds; Biological integrity; Diversity; Water quality; Wetlands; Birds; Biological integrity; Diversity; Water quality; Wetlands. Ano: 2007 URL: http://hdl.handle.net/10521/1185 Desarrollo de un índice de integrridad biológica avifáunico para los humedales de la reserva de la biosfera pantanosa de Centla, Tabasco Colegio de Postgraduados Córdova Avalos, Antonio. Se evaluó la salud de los Pantanos de Centla, Tabasco, mediante un índice de integridad biológica (IBI) utilizando a las aves como indicadoras. Se seleccionaron sitios de manglar y popal-tular con diferente grado de perturbación (conservado, semiconservado y perturbado). Un análisis de cambio de cobertura con imágenes de satélites Landsat MSS 1976 y ETM 2002 mostró pérdidas de cobertura de manglar de 21─31 % y tasas de deforestación anual de 0.8 ─ 1.2 %. El registro histórico de especies de aves fue de 328, detectándose 189 en este estudio, de las cuales 13 fueron nuevos registros para la Reserva. Se encontraron diferencias significativas en el número de especies entre sitios (α=0.05). De acuerdo con el estimador de cobertura basado en abundancias,... Palavras-chave: Aves; Integridad biológica; Diversidad; Calidad del agua; Humedales birds; Biological integrity; Diversity; Water quality; Wetlands. Ano: 2012 URL: http://hdl.handle.net/10521/822 Desarrollo de un índice de integrridad biológica avifáunico para los humedales de la reserva de la biosfera pantanosa de Centla, Tabasco Colegio de Postgraduados Córdova Avalos, Antonio. Se evaluó la salud de los Pantanos de Centla, Tabasco, mediante un índice de integridad biológica (IBI) utilizando a las aves como indicadoras. Se seleccionaron sitios de manglar y popal-tular con diferente grado de perturbación (conservado, semiconservado y perturbado). Un análisis de cambio de cobertura con imágenes de satélites Landsat MSS 1976 y ETM 2002 mostró pérdidas de cobertura de manglar de 21─31 % y tasas de deforestación anual de 0.8 ─ 1.2 %. El registro histórico de especies de aves fue de 328, detectándose 189 en este estudio, de las cuales 13 fueron nuevos registros para la Reserva. Se encontraron diferencias significativas en el número de especies entre sitios (α=0.05). De acuerdo con el estimador de cobertura basado en abundancias,... Palavras-chave: Aves; Integridad biológica; Diversidad; Calidad del agua; Humedales birds; Biological integrity; Diversity; Water quality; Wetlands. Ano: 2012 URL: http://hdl.handle.net/10521/801 Determinants of Rice Variety Diversity on Household Farms in the Terai Region of Nepal AgEcon Joshi, Ganesh R.; Bauer, Siegfried. Crop genetic resources are the building block of sustainable agricultural development as these can be used to develop crop varieties adaptable to heterogeneous environmental conditions. Nepal is considered the center of origin and diversity for Asian rice, which still has many landraces. However, there has been continuous loss of genetic diversity and concern over it has grown in recent years. The main objective of this paper is to identify the determinants of variety diversity on-farm in the rainfed ecosystem of Nepal by using two-limit Tobit procedure. The diversity on farm appeared to be quite high evaluated based on the number of named varieties grown by the farmers. Majority of the farmers cultivated both modern varieties and landraces simultaneously... Tipo: Conference Paper or Presentation Palavras-chave: Diversity; Market; Nepal; Rice; Variety; Crop Production/Industries. Ano: 2006 URL: http://purl.umn.edu/25422 Diel Variations and Ecological Aspects in Fish Assemblages of a Sandy Beach in the Semi-Arid Region of Northeast Brazil. BABT Dantas,Natália Carla Fernandes Medeiros; Silva Júnior,Carlos Antônio Beserra; Lippi,Daniel Lino; Feitosa,Caroline Vieira. ABSTRACT For the demersal fish that inhabit sandy beaches, the variation between day and night periods represents a determinant factor in their behavior, especially for species that live in shallow waters. This research aims at determining whether there are differences in the fish assemblage structure of the sandy beach of São Cristóvão, RN, Brazil, between diurnal and nocturnal periods. Samplings were carried out in 2011, during spring high tide period, with an otter trawl net. Dissimilarity between diurnal and nocturnal fish assemblages was confirmed by PERMANOVA results. No statistical differences were observed for richness and diversity of fish assemblage between day and night periods. The first and third order carnivores were the significantly more... Tipo: Info:eu-repo/semantics/article Palavras-chave: Demersal ichthyofauna; Density; Diversity; Total length; Day; Night. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100347 Distribución y diversidad de las "muñas" género Minthostachys (Lamiaceae) en Huanuco, Perú. Colegio de Postgraduados Tello Villavicencio, Milka Nelly. El 90% de lamiaceas denominadas “muñas” en Huánuco, Perú son especies del género Minthostachys y 10% restante de géneros relacionados. Las especies de Minthostachys encontradas fueron tres: Minthostachys mollis (Kunth) Griseb., con sus tres variedades, var. mollis, var. hybrida Schmidt-Leb. y var. mandoniana (Briq.) Schmidt-Leb., Minthostachys spicata (Benth.) Epling y Minthostachys latifolia Schmidt-Leb., así como una población sin identificar taxonómicamente, que probablemente es un híbrido intergenérico con Satureja. Excepto por Minthostachys mollis var. mollis se trata de nuevos registros para Huánuco; la variedad hybrida es un nuevo registro para Perú. Este trabajo documenta las especies encontradas, analiza la diferenciación geográfica y ecológica,... Palavras-chave: Diversidad; Etnobotánica; Clusa; Muña; Huánuco; Diversity; Ethnobotany; Doctorado; Genética. Ano: 2011 URL: http://hdl.handle.net/10521/395 Distribución y diversidad de las "muñas" género Minthostachys (Lamiaceae) en Huanuco, Perú. Colegio de Postgraduados Tello Villavivencio, Milka Nelly. El 90% de lamiaceas denominadas “muñas” en Huánuco, Perú son especies del género Minthostachys y 10% restante de géneros relacionados. Las especies de Minthostachys encontradas fueron tres: Minthostachys mollis (Kunth) Griseb., con sus tres variedades, var. mollis, var. hybrida Schmidt-Leb. y var. mandoniana (Briq.) Schmidt-Leb., Minthostachys spicata (Benth.) Epling y Minthostachys latifolia Schmidt-Leb., así como una población sin identificar taxonómicamente, que probablemente es un híbrido intergenérico con Satureja. Excepto por Minthostachys mollis var. mollis se trata de nuevos registros para Huánuco; la variedad hybrida es un nuevo registro para Perú. Este trabajo documenta las especies encontradas, analiza la diferenciación geográfica y ecológica,... Palavras-chave: Diversidad; Etnobotánica; Clusa; Muña; Huánuco; Diversity; Ethnobotany; Doctorado; Genética. Ano: 2011 URL: http://hdl.handle.net/10521/395 Distribution of frogs in riparian areas of an urban forest fragment in Central Amazonia Biota Neotropica Tsuji-Nishikido,Bruno Minoru; Menin,Marcelo. This study aimed to evaluate how environmental variables (width of valley, stream size, forest edge distance, and leaf-litter depth) affect the abundance and richness of species of frog species in riparian areas of an urban forest fragment in Central Amazonia. The study was conducted at the campus of the Universidade Federal do Amazonas, Manaus, Brazil, between May 2008 and April 2009, when three nocturnal and diurnal samples were taken from ten plots. A total of 17 species belonging to seven families were registered. The number of species recorded per plot varied from seven to 14. We detected a relationship between the edge distance and richness: the plots with lower richness were located near the fragment border. The variables had no significant effect... Tipo: Info:eu-repo/semantics/article Palavras-chave: Abundance; Anura; Edge effects; Diversity; Environmental variables. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000200007 Registros recuperados: 414 Primeira ... 2 3 4 5 6 7 8 9 10 ... Última

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