Analyzing the presence and quantifying trace elements is of paramount importance to understand natural environmental processes monitor degree anthropogenic disturbance mitigate impacts already caused. Here, we aimed establish a baseline profile concentrations in sandy sediments intertidal areas three Amazonian beaches (Brazil). For each beach, were collected from different sectors (south, cente...

Hydroelectric reservoirs bury significant amounts of organic carbon (OC) in their sediments. Many reservoirs are characterized by high sedimentation rates, low oxygen concentrations in bottom water and a high share of terrestrially derived OC, and all of these factors have been linked to a high efficiency of OC burial. However, investigations of OC burial efficiency (OCBE, i.e., the ratio betwe...

Escherichia coli grew faster in autoclaved marine sediment than in seawater alone. When E. coli was cultivated in sediment diluted with minimal medium M63 at 0.6 M NaCl, supplemented or not supplemented with glucose or with seawater, the osmoprotector glycine betaine was accumulated in the cells. The best growth occurred on glucose. Accumulation of glycine betaine was not observed with E. coli ...

Recent sediment accumulation rates in Adventfjorden (Svalbard), a small subpolar fjord, were determined by Pb and Cs dating. Modern rates in the central basin decrease downfjord from 1.87 to 0.87 cm y−1 (2.6 to 1.19 g cm−2 y−1). Comparison of the modern values (1986–2001) with older ones (1963–86) reveals a marked increase in sediment accumulation rates in the last ten years. This correlates we...

This article aims to analyze the contamination of water and bottom sediment at Arroio Moinho (Mill Stream), in Porto Alegre (Rio Grande do Sul, Brazil). From two sample collections, a series diagnostic measurements were carried out, such as: a) physical-chemical biological analysis water; b) quality index (WQI); c) metal contamination, granulometric mineralogical analyses sediment; d) total org...

increasing industrial activities lead to entrance of different pollutants into the environment, especially water resources. because of their persistency and non-biodegradation, metals can pose a threat to health of human and other organisms. sediment, fish (lucioperca stizostedion and cyprinus carpio), and common reed (phragmites australis) samples were collected from sattarkhan dam for investi...

Overlying water, sediment, rhizosphere sediment and mangrove seedlings in the Futian mangrove forest were analyzed for heavy metals. The results showed that mangrove plant acidified sediment and increased organic matter contents. Except for chromium (Cr), nickel (Ni) and copper (Cu) in Aegiceras corniculatum sediment, heavy metals in all sediments were higher than in overlying water, rhizospher...

A long-term goal of our sediment transport and accumulation investigations is to link sedimenttransport processes to the formation and preservation of event beds in sediment deposits. The general aim of this project is to investigate how forcing processes affect the sediment-transport dynamics that act to import or export fine-grained sediment in intertidal regions. We strive to understand how ...