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Registros recuperados: 25 | |
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Etchepare,Mariana A; Boccanelli,Silvia I. |
La regeneración de la comunidad vegetal, luego de sufrir algún tipo de disturbio, depende de la disponibilidad de propágulos cuya fuente primaria la constituye el banco de semillas del suelo. El objetivo de este trabajo fue analizar la composición florística, abundancia, riqueza y diversidad del banco de semillas y de la comunidad vegetal, y evaluar la relación entre ambos, en un lote agrícola de la llanura pampeana donde se desarrolló una sucesión secundaria a lo largo de 20 años. En la vegetación se registraron 13 especies, entre las cuales predominaron especies perennes y Sorghum halepense fue la dominante. En el banco de semillas se identificaron 12 especies, con predominio de especies anuales. Tres especies: Sorghum halepense, Carduus acanthoides y... |
Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Argentina; Pampa; Densidad de semillas; Disturbio; Sorghum halepense; Comunidad vegetal. |
Ano: 2007 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2007000100015 |
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Barisón,Caterina; Cruz,Nancy; Romano,Marcelo; Barberis,Ignacio M. |
Los flamencos son aves gregarias que habitan ambientes de agua salina. El Flamenco Austral (Phoenicopterus chilensis) y la Parina Grande (Phoenicoparrus andinus) están presentes en las lagunas del sur de Santa Fe, Argentina, durante el invierno. Este trabajo tiene por objetivos determinar los patrones de comportamiento de estas dos especies durante la estación invernal en la laguna Melincué y evaluar la influencia de variables meteorológicas sobre el comportamiento. Se seleccionaron individuos adultos de ambas especies y se registraron los comportamientos que realizaban y, simultáneamente, los valores de cinco variables meteorológicas (temperatura, sensación térmica, presión atmosférica, humedad relativa, velocidad del viento). Las principales... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Comportamiento; Condiciones meteorológicas; Conservación; Flamencos; Humedales; Pampa. |
Ano: 2014 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072014000200002 |
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Kasper,Carlos B.; Bastazini,Vinícius A. G.; Soares,José B. G.; Freitas,Thales R. O. de. |
Between January 2007 and December 2010, the abundance of medium-sized mammals was studied, with special focus on the Molina's hog-nosed skunk, Conepatus chinga (Molina, 1782), at four locations in southern Brazil. In this study, transect line methodology was used to obtain data for Distance Analyses. Transects were traveled by car at night, searching with spotlights along the edges of secondary roads in agricultural landscapes. Along 1,811 km, we obtained 620 observations of 20 mammal species. The most common species was the exotic European hare, Lepus europaeus (Pallas, 1778); the highest abundance estimated for South America was observed in one of the study areas, where its density was estimated as 32 individuals/km². Carnivores were the most commonly... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Density; Pampa; Transect lines; Sympatric species. |
Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000300009 |
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Silva,Guilherme O. da; Ott,Ricardo. |
ABSTRACT. At the Pampa Biome, grazing, like others disturbances, affects fauna and flora, creating heterogeneity in the environment. Little is known about how the diversity and richness of arthropods change during this impact. To improve the knowledge of how spider diversity is affected by grazing, experiments were realized at Pampa. The hypothesis is that abundance of spider will be different when comparing grazed and ungrazed areas. A paired block, with two areas of one hectare each, was established in three areas in the Environmental Protection Area of Ibirapuitã (APA Ibirapuitã), state of Rio Grande do Sul, Brazil. One of these hectares was closed with fences, excluding the catle grazing, in August of 2012. Samplings were realized in November of 2011,... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Neotropical; Pampa; Diversity; Araneae. |
Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212017000100233 |
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Teta,Pablo; Pardiñas,Ulyses F. J; Silveira,Mario; Aldazabal,Verónica; Eugenio,Emilio. |
Se describe el ensamble de roedores sigmodontinos recuperado en el sitio arqueológico "El Divisadero Monte 6", emplazado sobre la franja de humedales costeros de la Bahía de Samborombón (partido de General Lavalle, provincia de Buenos Aires, Argentina). Una datación de 540 ± 60 años radiocarbónicos antes del presente ubica la muestra en el Holoceno tardío. El ensamble está dominado por sigmodontinos frecuentes actualmente en el área (e.g., Akodon azarae, Oligoryzomys flavescens, Holochilus brasiliensis) y otros extintos regionalmente (e.g., Bibimys torresi, Pseudoryzomys simplex). La disminución de riqueza y diversidad que reflejan las comunidades actuales de sigmodontinos podría estar vinculada con el impacto antrópico que sufrió la región en los últimos... |
Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Bibimys; Cricetidae; Necromys; Pampa; Pseudoryzomys. |
Ano: 2013 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832013000100016 |
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Salizzi,Esteban. |
El presente artículo tiene como objetivo comparar las principales propuestas de regionalización del territorio argentino buscando establecer -a partir de su relevamiento, análisis y comparación- continuidades y rupturas en torno a la construcción conceptual de la Pampa. Esta preocupación se establece dentro de la perspectiva que señala que la geografía regional -en tanto modalidad de escritura geográfica que apela a la distinción, nominación y ordenamiento de entidades subnacionales para ofrecer interpretaciones de conjunto sobre el territorio y la sociedad de un país-, en sus diversas propuestas, implica modos de representar y de abordar las asimetrías internas de una sociedad. Se profundiza, entonces, tanto en los diversos paradigmas sobre los cuales se... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pampa; Región pampeana; Geografía regional; Territorio; Región. |
Ano: 2012 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1515-59942012000100001 |
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Loro,Vania Lucia; Murussi,Camila; Menezes,Charlene; Leitemperger,Jossiele; Severo,Eduardo; Guerra,Luciana; Costa,Maiara; Perazzo,Giselle Xavier; Zanella,Renato. |
Due to intense agricultural activity in the rio Uruguai (South Brazil), there is the potential for aquatic contamination by agrochemicals. In this region, there are many reservoirs to meet the water demand for rice fields, forming lentic environments. In line with this information, the aim of this study was to show a comparative analysis of some biomarkers, such as lipid peroxidation (TBARS), gluthatione S-transferase (GST), non-protein thiols (NPSH), amino acids (AA) and piscine micronucleus tests (MNE) in Astyanax jacuhiensis from lentic and lotic environments in the middle rio Uruguai region, comparing warm and cold seasons. Eight pesticides were found in water samples, with propoxur having the highest concentration found in both environments and... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomonitoring; Lotic and lentic environments; Pampa; Pesticides. |
Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000300569 |
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Siewert,Ricardo Russo; Gomes,Gustavo Crizel; Gallo,Mariana Centeno; Iserhard,Cristiano Agra. |
ABSTRACT Stichelia pelotensis (Lepidoptera, Riodinidae) is an endemic and threatened butterfly from the Pampa biome in southern Brazil, and has not been recorded in its type locality in the last 56 years. Recently, a population was found in two sites from extreme south Brazil, Pelotas, Rio Grande do Sul state. These records are an important find given the conservation status of S. pelotensis, since all the information gathered is new and involve the natural history of this species. The information obtained is useful for the management, monitoring and conservation priorities of this species and its associated habitats, since its known distribution is restricted to a narrow area in the Rio Grande do Sul Coastal Plain inside this threatened biome in southern... |
Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Distribution; Pampa; Red list; Symmachiini. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262016000100105 |
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Eggers,Lilian; Marchioretto,Rafaella; Souza-Chies,Tatiana T.; Chauveau,Olivier. |
ABSTRACT A taxonomic synopsis of Cypella (Iridaceae) in Brazil is presented with recognition of 16 species, two of them represented by two subspecies. An identification key to the taxa is provided and species are described and illustrated. New synonyms are indicated, and eight lectotypes, two epitypes and one neotype are designated. Results include distribution, habitat, phenology, conservation status, notes and examined specimens of all taxa, as well as comments on dubious and misused names. The resulting framework revealed that most of the Brazilian species of Cypella occur in the state of Rio Grande do Sul and in the Pampa Biome, although Río de la Plata grasslands (RPG) is the most species-rich biogeographic unit of the genus. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Campos; Cypella; Floristics; Iridaceae; Pampa; Rio de la Plata Grasslands; Taxonomy; Tigridieae; Typification. |
Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000400741 |
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Freitas,Elisete Maria de; Boldrini,Ilsi Iob; Müller,Sandra Cristina; Verdum,Roberto. |
Extensas áreas de campo nativo do sudoeste do Rio Grande do Sul são suscetíveis ao processo de arenização, que ocorre em áreas de fragilidade pedológica, tendo influência de interferência antrópica e fatores abióticos. Com o objetivo de testar a variação da cobertura vegetal e a dinâmica da arenização no tempo e conforme a influência da distância da encosta, foi desenvolvido um estudo florístico e fitossociológico em áreas de campo nativo sob pastejo. Duas subáreas, diferentes quanto ao processo da arenização, foram selecionadas no município de São Francisco de Assis, RS. O levantamento florístico apontou a ocorrência de 102 espécies, distribuídas em 25 famílias. No estudo fitossociológico, 35 quadros permanentes de 0,25 m² em cada subárea foram dispostos... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Areais; Campo nativo; Dinâmica vegetacional; Diversidade; Pampa. |
Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000200013 |
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Silveira,Fernanda Schmidt; Vargas,Wanderleia de; Fortuna-Perez,Ana Paula; Miotto,Silvia Teresinha Sfoggia. |
ABSTRACT Mimosa baptistae is a new species presenting stalked glandular trichomes that give it a glutinous appearance, mainly with respect to the leaflets. Furthermore, it is an aculeate species, with multijugate leaves, white stamens, and fruits also covered by glandular trichomes. A herbaria survey and fieldwork only recorded this species as occurring on sandstone outcrops of the city Caçapava do Sul, Brazil. The species may be confused with other species of Mimosa sect. Batocaulon ser. Stipellares such as M. bifurca, M. sobralii and M. lepidota. However, features such as absence/presence of aculei, stamens color, habitat, and flower features are useful for distinguishing them from the new species. Here, we provide notes on morphology, geographic... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glands; Leaflets; Pampa; Secretory structures; Serra do Sudeste. |
Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000400716 |
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Dalzochio,Marina Schmidt; Renner,Samuel; Sganzerla,Cleber; Prass,Gabriel; Ely,Gerson Junior; Salvi,Luana Carla; Dametto,Norton; Périco,Eduardo. |
Abstract: The regional knowledge of species diversity and distribution is important to support conservation strategies for species and their habitats. The main goal of this work is to present a checklist of Odonata species in the state of Rio Grande do Sul, as well as their known locations in the municipalities. The preparation of the list was based in data gathered from collections of Museu de Ciências da Universidade do Vale do Taquari (UNIVATES), Laboratório de Ecologia e Evolução da Universidade do Vale do Taquari (UNIVATES), Museu de Ciências Naturais da Fundação Zoootânica, Museu de Zoologia da Universidade do Vale do Rio dos Sinos (UNISINOS) plus data extracted from 65 publications and the sites SpeciesLink, All Odonata and Puget Sound University. A... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anisoptera; Atlantic Forest; Neotropical Region; Pampa; Zygoptera. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000400308 |
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Registros recuperados: 25 | |
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