Contribution of the geochemical, physico-chemical, mineralogical, and statistical approaches to the reconstructing of the Holocene depositional environments along South-Eastern Tunisia

2021 ◽  
Vol 14 (19) ◽  
Author(s):  
Amal Gammoudi ◽  
Ali Tlili ◽  
Elhoucine Essefi ◽  
Hafed El Feki ◽  
Hafedh Rigane
Keyword(s):  
Depositional Environments ◽  
The Holocene ◽  
South Eastern ◽  
Physico Chemical ◽  
Statistical Approaches

scholarly journals Soft-Bottom macrobenthic communities of the Vitória Bay estuarine system, South-eastern Brazil

2005 ◽  
Vol 53 (1-2) ◽  
pp. 23-38 ◽  
Author(s):  
Rosebel C. Nalesso ◽  
Jean-Christophe Joyeux ◽  
Cintia O. Quintana ◽  
Evelise Torezani ◽  
Ana Clara Paz Otegui
Keyword(s):  
Dissolved Oxygen ◽  
Organic Matter Content ◽  
Abundant Species ◽  
Coarse Sand ◽  
Organic Content ◽  
Matter Content ◽  
Estuarine System ◽  
South Eastern ◽  
Eastern Brazil ◽  
Physico Chemical

The present work describes and analyses the structure of the macrobenthic epi- and infaunal assemblage of the estuarine system of Vitória Bay, South-eastern Brazil, from January 1998 to June 1999. Replicated sampling at intertidal and subtidal levels was conducted quarterly at ten stations. Intertidal and subtidal sediment composition was characterised. Water physico-chemical parameters were measured in situ. A total of 10,695 individuals, belonging to 144 taxa, were collected. Molluscs, crustaceans and polychaetes were the most abundant groups. The bivalves Anomalocardia brasiliana, Mytella guyanensis and M. falcata were the most abundant species. Locally, significant discharges of residential and industrial wastewater resulted in high organic content in the sediment (up to 30%) and low dissolved oxygen concentration in the water (< 1mg.l-1). Near the two entrances of the bay, high hydrodynamic activity and coarse sand reduced the detrimental effects of raw and treated sewage inputs. Species richness (S), diversity (H') and total abundance (A) decreased from outer-bay stations (22 < S < 72; 1.99 < H' < 2.85; 320 < A < 1737) towards inner-bay stations (2 < S < 45; 0.59 < H' < 2.67; 2 < A < 1317), where salinity and dissolved oxygen were lowest and organic matter content highest.

scholarly journals A preliminary redating of the Holocene Roonka burials, south-eastern Australia

2017 ◽  
Vol 52 (2) ◽  
pp. 98-107 ◽  
Author(s):  
JUDITH LITTLETON ◽  
FIONA PETCHEY ◽  
KERYN WALSHE ◽  
F. DONALD PATE
Keyword(s):  
The Holocene ◽  
South Eastern ◽  
Eastern Australia ◽  
South Eastern Australia

Coralline Algae Depositional Environments on the Brazilian Central–South-Eastern Shelf

2012 ◽  
Vol 279 ◽  
pp. 270-279 ◽  
Author(s):  
Gilberto Tavares de Macedo Dias ◽  
Roberto Campos Villaça
Keyword(s):  
Depositional Environments ◽  
Coralline Algae ◽  
South Eastern ◽  
Eastern Shelf ◽  
Central South

scholarly journals Characterization of the benthic environment of a coastal area adjacent to an oil refinery, Todos os Santos Bay (NE-Brazil)

2004 ◽  
Vol 52 (2) ◽  
pp. 123-134 ◽  
Author(s):  
Natalia Venturini ◽  
Luiz Roberto Tommasi ◽  
Márcia C. Bícego ◽  
César C. Martins
Keyword(s):  
Dry Weight ◽  
Depositional Environments ◽  
Oil Refinery ◽  
East Region ◽  
Physico Chemical ◽  
Benthic Environment ◽  
Polycyclic Aromatic ◽  
High Concentrations ◽  
Mixed Origin ◽  
High Degree

In order to determine the sedimentological and physico-chemical characteristics of the benthic environment and also the level, distribution and probable sources of aliphatic and polycyclic aromatic hydrocarbons, sediment samples were collected at 28 stations in the northeast portion of Todos os Santos Bay. The centre and the east region of the study area showed characteristics of depositional environments with the predominance of silt and clay and high percentages of TOC, nitrogen and sulphur. The molar C/N ratios varied between 8.8 and 27.6 indicating a mixed origin of organic matter with variable marine and continental contributions. Total aliphatic hydrocarbon concentrations ranged between 1.56 and 246.91 µg.g-1 dry weight, corresponding the high concentrations to the stations situated in the centre and in the east region of the study area. The UCM represented between 60 and 96% of the total aliphatic hydrocarbons, indicating a high degree of anthropogenic contribution and the presence of petroleum degraded residues. Total PAH concentrations varied from 8 to 4163 ng.g-1 dry weight. The highest total PAH concentration was recorded at station 5 situated adjacent to the oil refinery.

Temperature effect on biochar produced from tea (Camellia sinensis L.) pruning litters: A comprehensive treatise on physico-chemical and statistical approaches

2020 ◽  
Vol 318 ◽  
pp. 124023
Author(s):  
Arup Borgohain ◽  
Kaberijyoti Konwar ◽  
Dibyajit Buragohain ◽  
Sam Varghese ◽  
Amrit Kumar Dutta ◽  
...  
Keyword(s):  
Temperature Effect ◽  
Camellia Sinensis ◽  
Physico Chemical ◽  
Comprehensive Treatise ◽  
Statistical Approaches
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