Characterization of a mud deposit offshore of the Patos Lagoon, southern Brazil

2009 ◽  
Vol 29 (3) ◽  
pp. 597-608 ◽  
Author(s):  
Allen H. Reed ◽  
Richard W. Faas ◽  
Mead A. Allison ◽  
Lauro J. Calliari ◽  
K.T. Holland ◽  
...  
Keyword(s):  
Southern Brazil ◽  
Patos Lagoon ◽  
Mud Deposit

scholarly journals Temporal Variability of Suspended-Solids Concentration in the Estuarine Channel of Patos Lagoon, Southern Brazil

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 646
Author(s):  
Rafael André Ávila ◽  
Priscila Mulattieri Suarez Orozco ◽  
Mauro Michelena Andrade ◽  
Osmar Olinto Möller
Keyword(s):  
Temporal Variability ◽  
Suspended Solids ◽  
Southern Brazil ◽  
Patos Lagoon ◽  
Reliable Technique ◽  
Acoustic Data ◽  
Solids Concentration ◽  
Estuarine Hydrodynamics ◽  
Inflow Conditions

The assessment of suspended-solids dynamics is crucial for the effective monitoring of estuarine environments. As the recurring in-situ sampling is usually problematic, the calibration of the backscattering from acoustic Doppler profilers has shown to be a reliable technique to estimate the suspended-solids concentration (SSC) in estuaries and rivers. In this study, we obtained a linear model that provides SSC estimates for the estuarine channel of Patos Lagoon by calibrating turbidity and acoustic data with in-situ concentration samples. The model output was analyzed in terms of its relationship with estuarine hydrodynamics and temporal variability. In this estuary, the supply of suspended solids is known to be due the runoff from its main tributaries, but also through the exchanges between the estuary and the coastal ocean. Both sources provide sediments and organic solids which affect water quality, geomorphology, and harbor operations. Results show that SSC is strongly linked to estuarine hydrodynamics, where concentrations increase with streamflow. During outflow periods, higher concentrations are associated with river runoff, whereas with inflow conditions they are induced by southern and southwesterly winds. However, relationship between SSC and streamflow is asymmetrical, meaning that the largest concentrations are majorly linked to outflow currents and downstream transport.

scholarly journals Diet and feeding strategy of the dusky grouper Mycteroperca marginata (Actinopterygii: Epinephelidae) in a man-made rocky habitat in southern Brazil

2011 ◽  
Vol 9 (1) ◽  
pp. 161-168 ◽  
Author(s):  
Mario V. Condini ◽  
Elisa Seyboth ◽  
João P. Vieira ◽  
Alexandre M. Garcia
Keyword(s):  
Feeding Strategy ◽  
Marine Species ◽  
Southern Brazil ◽  
Patos Lagoon ◽  
Additional Tool ◽  
Rocky Habitat ◽  
Dusky Grouper ◽  
Dietary Shifts ◽  
Rocky Habitats ◽  
Rocky Bottoms

The dusky grouper (Mycteroperca marginata) is a marine species usually associated with rocky bottoms and reefs. The present work investigated the diet and feeding strategy of a dusky grouper population inhabiting a 4.5 km long pair of rocky jetties located in the mouth of Patos Lagoon estuary. No prior research has been conducted in such man-made habitat and the current study provides a basis for comparative studies on the diet of the dusky grouper populations inhabiting natural vs. man-made rocky habitats. Similarly with previous studies on natural substrates, crabs and fishes were the main food categories consumed (%IRI = 85.1 and %IRI = 12.6, respectively), whereas shrimps and mollusks had lower importance in the diet (%IRI = 1.9 and 0.4, respectively). As previously reported for dusky grouper populations inhabiting reefs and rocky bottoms, the present work revealed conspicuous size related dietary shifts. Blue crabs and fishes become increasingly important food items in the diet of larger individuals (> 500 mm, TL). Finally, it was found that the studied dusky population has a generalist feeding strategy with a high between-individual variation in prey consumption. Such strategy remained similar across the size increment of the species. Our findings suggest that man-made rocky substrates provide suitable feeding grounds for the dusky grouper in southern Brazil and could be used as an additional tool in the conservation efforts of this endangered species.

scholarly journals Characterization of bioactive compounds, antioxidant activity and minerals in landraces of pumpkin (Cucurbita moschata) cultivated in Southern Brazil

2016 ◽  
Vol 37 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Daniela PRIORI ◽  
Eduardo VALDUGA ◽  
Juliana Castelo Branco VILLELA ◽  
Claudete Clarice MISTURA ◽  
Márcia VIZZOTTO ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Bioactive Compounds ◽  
Cucurbita Moschata ◽  
Southern Brazil

Characterization of the epiphytic lichen vegetation in a riparian forest in southern Brazil

2016 ◽  
Vol 149 (1) ◽  
pp. 92-100 ◽  
Author(s):  
Márcia Käffer ◽  
Renata Dantas ◽  
Suzana Martins
Keyword(s):  
Riparian Forest ◽  
Southern Brazil ◽  
Epiphytic Lichen

Molecular characterization of Mycobacterium tuberculosis isolated in the State of Parana in southern Brazil

Tuberculosis ◽  
2009 ◽  
Vol 89 (1) ◽  
pp. 101-105 ◽  
Author(s):  
Marcelo Malaghini ◽  
Sonia Regina Brockelt ◽  
Marion Burger ◽  
Afrânio Kritski ◽  
Vanete Thomaz-Soccol
Keyword(s):  
Mycobacterium Tuberculosis ◽  
Molecular Characterization ◽  
The State ◽  
Southern Brazil

scholarly journals Molecular characterization of HTLV-1 and HTLV-2 and routes of virus transmission in HIV-infected patients from the southeastern and southern Brazil

Retrovirology ◽  
2014 ◽  
Vol 11 (Suppl 1) ◽  
pp. P47
Author(s):  
Mariana C Magri ◽  
Luis FM Brígido ◽  
Helena K Morimoto ◽  
Adele Caterino-de-Araujo
Keyword(s):  
Molecular Characterization ◽  
Virus Transmission ◽  
Southern Brazil

scholarly journals Molecular and pathological characterization of teat papillomatosis in dairy cows in southern Brazil

2019 ◽  
Vol 51 (1) ◽  
pp. 369-375 ◽  
Author(s):  
Ronaldo Michel Bianchi ◽  
Christian Diniz Beduschi Travassos Alves ◽  
Claiton Ismael Schwertz ◽  
Welden Panziera ◽  
Cíntia De Lorenzo ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Southern Brazil

Archaeological Earthen Mound Complex in Patos Lagoon, Southern Brazil: Chronological Model and Freshwater Influence

Radiocarbon ◽  
2017 ◽  
Vol 59 (1) ◽  
pp. 195-214 ◽  
Author(s):  
Rafael G Milheira ◽  
Kita D Macario ◽  
Ingrid S Chanca ◽  
Eduardo Q Alves
Keyword(s):  
Archaeological Sites ◽  
Human Intervention ◽  
Southern Brazil ◽  
Patos Lagoon ◽  
Lagoon System ◽  
Indigenous Groups ◽  
Freshwater Influence ◽  
Intense Activity

AbstractIn the present work, we assess the chronology of archaeological sites known as earthen mounds, commonly found at the Pampas biome, among the lowlands of Brazil, Uruguay, and Argentina. We focused on the Pontal da Barra settlement, which is a testimony of the long-term occupation of indigenous groups in the swamp and wet environment of Patos Lagoon, southern Brazil. A Bayesian chronological model based on the radiocarbon (14C) dating of 17 samples of fish otolith, 5 charcoal fragments, and 2 bones (human and dog) allowed determination of the beginning of the occupation as well as the occupational synchronism of the different mounds. The nature of the samples allows us to study the local 14C reservoir effect through the comparison between the group of marine and terrestrial samples, deriving a reservoir offset value of 63±53 14C yr for this particular area, indicating a strong freshwater influence in the lagoon system. We estimate the start of human intervention in the landscapes of southern Patos Lagoon to be around 2200 cal BP, with the most intense activity between 1800 and 1200 cal BP.

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