scholarly journals Amphibians of the Sinos River Basin, southern Brazil

2021 ◽  
Vol 16 (3) ◽  
pp. 435-449
Author(s):  
Camila F. Moser ◽  
Renata K. Farina ◽  
Márcio Borges-Martins ◽  
Iberê F. Machado ◽  
Patrick Colombo ◽  
...  
Keyword(s):  
River Basin ◽  
High Probability ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Natural Habitats ◽  
Amphibian Species ◽  
Relevant Role ◽  
Scientific Collections ◽  
High Degree ◽  
Collection Point

The Sinos River encompasses a wide area of natural habitats and, at the same time, supports one of the highest population densities of southern Brazil. Consequently, natural habitats along the Basin present a high degree of habitat disturbance. Despite of the existence of threatened species, information about diversity of amphibians in that area is scarce. Thus, we aimed to catalogue the amphibian species of the Sinos River Basin from records in scientific collections and compilation of published articles. We recorded 52 species, all with geographic coordinates validated at the collection point, indicating that the Sinos River Basin harbours about 50% of the amphibian species of the State of Rio Grande do Sul. Three anuran species were classified as having some degree of threat: Melanophryniscus cambaraensis, Melanophryniscus dorsalis and Thoropa saxatilis. We also expected other 18 species with a high probability of occurrence in the Basin. This work shows that, despite the intense human impact, the Sinos River Basin has a relevant role for the maintenance of a considerable fraction of the amphibian biodiversity in southern Brazil.

scholarly journals Evaluation of water quality at the source of streams of the Sinos River Basin, southern Brazil

2015 ◽  
Vol 75 (2 suppl) ◽  
pp. 98-104 ◽  
Author(s):  
T Benvenuti ◽  
MA Kieling-Rubio ◽  
CR Klauck ◽  
MAS Rodrigues
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Quality Index ◽  
Rio Grande ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Quality Indices ◽  
Physical Chemical ◽  
The Us ◽  
Microbiological Parameters

<p>The Sinos River Basin (SRB) is located in the northeastern region of the state of Rio Grande do Sul (29º20' to 30º10'S and 50º15' to 51º20'W), southern Brazil, and covers two geomorphologic provinces: the southern plateau and the central depression. It is part of the Guaíba basin, has an area of approximately 800 km<sup>2</sup> and contains 32 counties. The basin provides drinking water for 1.6 million inhabitants in one of the most important industrial centres in Brazil. This study describes different water quality indices (WQI) used for the sub-basins of three important streams in the SRB: Pampa, Estância Velha/Portão and Schmidt streams. Physical, chemical and microbiological parameters assessed bimonthly using samples collected at each stream source were used to calculate the Horton Index (HI), the Dinius Index (DI) and the water quality index adopted by the US National Sanitation Foundation (NSF WQI) in the additive and multiplicative forms. These indices describe mean water quality levels at the streams sources. The results obtained for these 3 indexes showed a worrying scenario in which water quality has already been negatively affected at the sites where three important sub-basins in the Sinos River Basin begin to form.</p>

scholarly journals Species richness of fern and lycophyte in an urban park in the Rio dos Sinos basin, Southern Brazil

2010 ◽  
Vol 70 (4 suppl) ◽  
pp. 1161-1167 ◽  
Author(s):  
JL. Schmitt ◽  
MNB Goetz
Keyword(s):  
Species Richness ◽  
Rio Grande ◽  
Life Forms ◽  
The State ◽  
Urban Park ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Conservation Areas ◽  
Natural Habitats ◽  
Floristic Survey

In the northeastern region of the State of Rio Grande do Sul in Southern Brazil, specifically in the Rio dos Sinos basin, urban parks are an important alternative for the conservation of the remaining natural habitats, as well as for the maintenance and perpetuation of biodiversity. A floristic survey of fern and lycophyte species in the Parque Municipal Henrique Luís Roessler (PMHLR) (29º 41' S and 51º 06' W; alt. 16.4 m) in Novo Hamburgo, (State of Rio Grande do Sul, RS) described their life-forms, as well as substrates and preferential environments. Forty-three species, 30 genera and 15 families were found, 39 of which were ferns. The hemicryptophytes had the highest species richness (26), 17of which were repent, and nine, rosulate. Most species were found in terrestrial substrates (32) and inside the forest (29). Species richness in the PMHLR corresponded to about 13% of the total fern and lycophyte species listed for the State of Rio Grande do Sul, which demonstrates the importance of conservation areas in the Rio dos Sinos basin as an alternative to the preservation of local biodiversity.

scholarly journals Dissimilarity between Andropogon lateralis ecotypes under different defoliation frequencies and heights

2022 ◽  
Vol 52 (3) ◽  
Author(s):  
Thiago Barros ◽  
Roberto Luis Weiler ◽  
Juliana Medianeira Machado ◽  
Diógenes Cecchin Silveira ◽  
André Pich Brunes ◽  
...  
Keyword(s):  
Dry Matter ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Forage Production ◽  
Breeding Programs ◽  
Native Grasslands ◽  
Superior Genotypes ◽  
Selection For ◽  
High Degree ◽  
Selection Of

ABSTRACT: Andropogon lateralis Nees is a native grass of southern Brazil and is one of the most frequent specie found in native grasslands. The species is widely distributed and has a high degree of phenotypic plasticity, which makes it highly adaptable to different edaphoclimatic conditions and management. This study aimed to evaluate the behavior of twelve ecotypes of A. lateralis, collected in different regions of the state of Rio Grande do Sul and cut to three different heights and subjected to two different defoliation frequencies. From September to February, the ecotypes were evaluated for total dry matter, leaf and stem yields. In addition, total, vegetative and reproductive tillers and plant height were measured. These characteristics are important for the selection of superior genotypes in terms of genetic variability and forage production. Total dry matter and leaf dry matter are characteristics with agronomic importance and they showed the highest correlation (r = 0.77), enabling an indirect selection for one of these characteristics. The natural selection of plants resulted in distinct structural, morphological and productive characteristics with heterogeneity that allows the selection and grouping according to the characteristics, ecotypes with superior agronomic characteristics can be included in breeding programs.

scholarly journals Pisces, Cyprinodontiformes, Rivulidae, Austrolebias periodicus (Costa, 1999): Distribution extension in state of Rio Grande do Sul, southern Brazil

Check List ◽  
2010 ◽  
Vol 6 (2) ◽  
pp. 234 ◽  
Author(s):  
Matheus Vieira Volcan ◽  
Luis Esteban Krause Lanés ◽  
Ândrio Cardozo Gonçalves
Keyword(s):  
High Risk ◽  
Endangered Species ◽  
River Basin ◽  
Present Note ◽  
Rio Grande ◽  
Conservation Strategies ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Annual Killifish ◽  
Pampas Region

The present note extends the distribution of annual killifish Austrolebias periodicus, a endangered species, endemic of the Pampas region, in Ibicuí River basin, state of Rio Grande do Sul, southern Brazil. This information is needed to develop conservation strategies for this species and its habitat, which are at high risk due to the expansion of rice production and exotic forests in southern Brazil.

scholarly journals Pisces, Perciformes, Cichlidae, Laetacara dorsigera (Heckel, 1840): distribution extension and first record for Uruguay River basin, and state of Rio Grande do Sul, southern Brazil

Check List ◽  
2010 ◽  
Vol 6 (1) ◽  
pp. 116
Author(s):  
Luis Esteban Krause Lanés ◽  
Leonardo Maltchik ◽  
Carlos Alberto S. de Lucena
Keyword(s):  
River Basin ◽  
Rio Grande ◽  
First Record ◽  
River Basins ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Paraguay River ◽  
First Time ◽  
Uruguay River

The present study records for the first time the small cichlidae fish Laetacara dorsigera (Heckel, 1840) at Uruguay River basin and state of Rio Grande do Sul, southern Brazil, previously known from Amazon, Paraná and Paraguay River basins. Although the ichthyofauna of Uruguay River basin is relatively well known, this record suggests that there are still unexplored environments, such as wetlands, where there may be species not yet reported, and found in other hydrographic systems.

scholarly journals Fish, Cubatão River basin, Atlantic Rainforest stream, Paraná, Brazil

Check List ◽  
2009 ◽  
Vol 5 (1) ◽  
pp. 008 ◽  
Author(s):  
Vinícius Abilhoa ◽  
Leonardo Pussieldi Bastos
Keyword(s):  
Species Identification ◽  
River Basin ◽  
Coastal Region ◽  
Atlantic Rainforest ◽  
Southeastern Brazil ◽  
Southern Brazil ◽  
Collection Data ◽  
Fish Collection ◽  
Atlantic Rainforest Biome ◽  
High Degree

The freshwater ichthyofauna of the Cubatão River basin was studied. This drainage belongs to the Atlantic rainforest biome in Paraná state coastal region, southern Brazil. Considering fish collection data and extensive new collections, 41 species were listed of the families Characidae, Erythrinidae, Crenuchidae, Curimatidae, Heptapteridae, Pseudopimelodidae, Callichthyidae, Trichomycteridae, Loricariidae, Gymnotidae, Cichlidae, Anablepidae, Poeciliidae, and Synbranchidae. The river studied showed the ichthyofaunistic pattern of the coastal drainages of the Atlantic rainforest biome of southeastern Brazil, characterized by a high degree of endemism. A key for species identification is provided.

scholarly journals Proteogenomic Insights into the Physiology of Marine, Sulfate-Reducing, Filamentous Desulfonema limicola and Desulfonema magnum

2021 ◽  
Vol 31 (1) ◽  
pp. 36-56
Author(s):  
Vanessa Schnaars ◽  
Lars Wöhlbrand ◽  
Sabine Scheve ◽  
Christina Hinrichs ◽  
Richard Reinhardt ◽  
...  
Keyword(s):  
Energy Metabolism ◽  
Gene Clusters ◽  
Transport Systems ◽  
Natural Habitats ◽  
Sulfate Reducing ◽  
Type Iv ◽  
Aromatic Compound Degradation ◽  
High Degree ◽  
Reducing Bacteria ◽  
Gliding Movement

The genus Desulfonema belongs to the deltaproteobacterial family Desulfobacteraceae and comprises marine, sulfate-reducing bacteria that form filaments and move by gliding. This study reports on the complete, manually annotated genomes of Dn. limicola 5ac10T (6.91 Mbp; 6,207 CDS) and Dn. magnum 4be13T (8.03 Mbp; 9,970 CDS), integrated with substrate-specific proteome profiles (8 vs. 11). The richness in mobile genetic elements is shared with other Desulfobacteraceae members, corroborating horizontal gene transfer as major driver in shaping the genomes of this family. The catabolic networks of Dn. limicola and Dn. magnum have the following general characteristics: 98 versus 145 genes assigned (having genomic shares of 1.7 vs. 2.2%), 92.5 versus 89.7% proteomic coverage, and scattered gene clusters for substrate degradation and energy metabolism. The Dn. magnum typifying capacity for aromatic compound degradation (e.g., p-cresol, 3-phenylpropionate) requires 48 genes organized in operon-like structures (87.7% proteomic coverage; no homologs in Dn. limicola). The protein complements for aliphatic compound degradation, central pathways, and energy metabolism are highly similar between both genomes and were identified to a large extent (69–96%). The differential protein profiles revealed a high degree of substrate-specificity for peripheral reaction sequences (forming central intermediates), agreeing with the high number of sensory/regulatory proteins predicted for both strains. By contrast, central pathways and modules of the energy metabolism were constitutively formed under the tested substrate conditions. In accord with their natural habitats that are subject to fluctuating changes of physicochemical parameters, both Desulfonema strains are well equipped to cope with various stress conditions. Next to superoxide dismutase and catalase also desulfoferredoxin and rubredoxin oxidoreductase are formed to counter exposure to molecular oxygen. A variety of proteases and chaperones were detected that function in maintaining cellular homeostasis upon heat or cold shock. Furthermore, glycine betaine/proline betaine transport systems can respond to hyperosmotic stress. Gliding movement probably relies on twitching motility via type-IV pili or adventurous motility. Taken together, this proteogenomic study demonstrates the adaptability of Dn. limicola and Dn. magnum to its dynamic habitats by means of flexible catabolism and extensive stress response capacities.

A 12-year study of fungal infections in Rio Grande do Sul, Southern Brazil

2019 ◽  
Vol 36 (2) ◽  
pp. 55-60 ◽  
Author(s):  
Vanessa da Silva Fay ◽  
Tatiana Schäffer Gregianini ◽  
Ana Beatriz Gorini da Veiga ◽  
Stela Maris Bottin Gonçalves ◽  
Diana Mara Rodrigues ◽  
...  
Keyword(s):  
Fungal Infections ◽  
Rio Grande ◽  
Southern Brazil ◽  
Rio Grande Do Sul

Molecular Detection of Trypanosoma kaiowa in Tabanus triangulum (Diptera: Tabanidae) from the Coastal Plain of Rio Grande do Sul, Southern Brazil

2021 ◽  
Author(s):  
Gratchela D. Rodrigues ◽  
Eduardo Blodorn ◽  
Ândrio Zafalon-Silva ◽  
William Domingues ◽  
Roberta Marques ◽  
...  
Keyword(s):  
Coastal Plain ◽  
Molecular Detection ◽  
Rio Grande ◽  
Southern Brazil ◽  
Rio Grande Do Sul

scholarly journals On the lack of adaptation in the Tristichaceœ and Podostemaceœ

1914 ◽  
Vol 87 (598) ◽  
pp. 532-550 ◽  
Keyword(s):  
Life History ◽  
Morphological Structure ◽  
Living Condition ◽  
Flowering Plants ◽  
Natural Habitats ◽  
Dead Material ◽  
Dry Seasons ◽  
Great Uniformity ◽  
High Degree

With the exception of some of the parasitic orders, such as the Balanophoraceœ , there are probably no families of flowering plants—one might almost include flowerless—which are so completely transformed from the average or mesophytic type of the phanerogams into types which are so completely unique and peculiar, as the Tristichaceæ and still more the Podostemaceæ. Nor are there any in which, with such very great uniformity in the conditions of life, there is such remarkable variety in the morphological structure. The structure of the orders, or rather of their members, being unique, and the conditions under which they live being also unique, it has been taken for granted that the former is in a high degree adapted to the latter, the flat thallus-like expansions of stem or root being looked upon as admirably suited to the rushing water in which they live. So long as we were almost completely ignorant of the actual living plants, and content with dead material collected mainly in the dry seasons, this was all very well, but now that for 17 years I have devoted much attention to these plants,* have studied them in the living condition in their natural habitats in India, Ceylon, and Brazil, have followed them from germination right through their life-history, and in other ways become absolutely familiar with them, and as a result of all this have arrived at diametrically opposite conclusions, it will repay us to examine into the question in some detail.

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