scholarly journals Changing environmental conditions due to anthropogenic activities in the Lac Dasserat watershed over the recent past using diatoms as a biological proxy: Preliminary results

2016 ◽  
Author(s):  
P B Hamilton ◽  
I Lavoie
Keyword(s):  
Environmental Conditions ◽  
Anthropogenic Activities ◽  
Recent Past ◽  
Preliminary Results

Innovative on-site infrasound metrology conducted in 2019 and 2020

2021 ◽  
Author(s):  
stephane denis ◽  
paul vincent ◽  
Rouille Guillaume
Keyword(s):  
Environmental Conditions ◽  
Medium Term ◽  
Good Correspondence ◽  
Preliminary Results ◽  
Innovative System ◽  
Metrology System ◽  
Term Objective

<p>In order to improve the confidence in the results of measurements carried out in the field, on-site metrology is a key step. With the medium-term objective of being able to deploy a portable metrology system on different infrasound stations, CEA-DAM has tested an innovative system for calibrating its infrasound sensors. The first tests were conducted in November 2019 and September 2020 as part of the installation and certification of the IMS IS25 infrasound station in Guadeloupe. A total of 20 microbarometers were qualified on site.<br>We present the equipments deployed, the methods used and the results of the measurements carried out. It appears that the preliminary results show a very good correspondence between the measurements performed in the field, under particular environmental conditions, and the measurements performed in the metrology laboratory. The method will be confronted to the metrology community within the framework of the European Infra-AUV project in 2022.</p>

Measuring Radon and Thoron Levels in Sri Lanka

2013 ◽  
Vol 718-720 ◽  
pp. 721-724
Author(s):  
Deepal Subasinghe Nalaka ◽  
Mahakumara Prasad ◽  
Thusitha B. Nimalsiri ◽  
Nuwan B. Suriyaarchchi ◽  
Takeshi Iimoto ◽  
...  
Keyword(s):  
Sri Lanka ◽  
Environmental Conditions ◽  
In Situ Measurements ◽  
Physical Factors ◽  
Preliminary Results ◽  
Radon Measurements ◽  
First Time

For the first time in Sri Lanka, an attempt was made to measure the outdoor radon levels using CR 39 type passive radon detectors. Preliminary results indicate that in Sri Lanka, 220Rn isotope is more abundance than 222Rn isotope. These results were also confirmed by in-situ measurements. Sri Lanka has one of the highest 220Rn values in the region. It was also noted that environmental conditions and other physical factors have a significant effect on the outdoor radon measurements using passive discriminative detectors.

Extremophiles and Their Application in Bioremediation

2022 ◽  
pp. 188-206
Author(s):  
Himanshu Pandey ◽  
Devendra Singh ◽  
Vinay Kumar Dhiman ◽  
Vivek Kumar Dhiman ◽  
Devendra Pandey
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Heavy Metal ◽  
Environmental Conditions ◽  
Anthropogenic Activities ◽  
Heavy Metal Stress ◽  
Extreme Conditions ◽  
Alkaline Ph ◽  
Immense Potential

A microorganism dwelling in severe environmental conditions is termed an extremophile. These unfavorable environmental conditions include high salinity, toxin compounds, heavy metals, unfavorable temperature, and extremely acidic and alkaline pH. Microorganisms belonging to prokaryotes include true bacteria and archaea bacteria which prevail in harsh environments. In recent years, extremophilic, basically, archaea bacteria have been reported for their immense potential application in the bioremediation process. Bioremediation is a technique that utilizes microorganisms for the decomposition of organic and inorganic pollutants; anthropogenic activities are the basic cause of soil pollution, water pollution, and air pollution globally. Extremophiles are capable of producing enzymes that are thermolabile and can function normally even in extreme conditions. These enzymes and proteins can be utilized in the bioremediation process under extreme pH, heavy metal stress, and unfavorable temperature conditions. In this chapter, the role of extremophiles in bioremediation is discussed.

scholarly journals Tara Pacific Expedition’s Atmospheric Measurements of Marine Aerosols across the Atlantic and Pacific Oceans: Overview and Preliminary Results

2020 ◽  
Vol 101 (5) ◽  
pp. E536-E554 ◽  
Author(s):  
J. M. Flores ◽  
G. Bourdin ◽  
O. Altaratz ◽  
M. Trainic ◽  
N. Lang-Yona ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Chemical Properties ◽  
Number Concentration ◽  
Marine Atmosphere ◽  
Marine Aerosol ◽  
Marine Aerosols ◽  
Atmospheric Measurements ◽  
Preliminary Results ◽  
Production Mechanisms

Abstract Marine aerosols play a significant role in the global radiative budget, in clouds’ processes, and in the chemistry of the marine atmosphere. There is a critical need to better understand their production mechanisms, composition, chemical properties, and the contribution of ocean-derived biogenic matter to their mass and number concentration. Here we present an overview of a new dataset of in situ measurements of marine aerosols conducted over the 2.5-yr Tara Pacific Expedition over 110,000 km across the Atlantic and Pacific Oceans. Preliminary results are presented here to describe the new dataset that will be built using this novel set of measurements. It will characterize marine aerosols properties in detail and will open a new window to study the marine aerosol link to the water properties and environmental conditions.

Taphos-m, a Taphonomical Research using Sus scrofa domestica Model in an Experimental Facility

2017 ◽  
Vol 1 (1) ◽  
pp. 33-48
Author(s):  
A. Gutiérrez ◽  
D. Nociarová ◽  
A. Malgosa ◽  
N. Armentano
Keyword(s):  
Environmental Conditions ◽  
Sus Scrofa ◽  
Experimental Archaeology ◽  
Cortical Surface ◽  
Experimental Facility ◽  
Domestic Pig ◽  
Preliminary Results ◽  
Different Types ◽  
Sus Scrofa Domestica

Taphos-m is an experimental archaeology and anthropology project, created in 2011, with the objective of knowing what taphonomic agents and processes could be responsible for the observable effects in the field. The first stage of the project consisted of the burial of 26 domestic pig carcases under different environmental conditions and burial types; the antemortem information about the animals was also compiled. This paper presents the preliminary results obtained during the first three years since the last burial took place. The evolution of the funerary structures was evaluated and four bodies were exhumed. The antemortem data and the information obtained from these four exhumations, have helped in understanding of the cadaveric state of the bodies and the anatomical disassociation of bones buried in different types of funerary structures. The preservation and condition of the cortical surface of the bones and the presence or absence of fragmentation were described too. The results presented here allow an understanding of the evolution of the characteristics of the facility and the differences among the pig remains. Opening all funerary structures is considered necessary in order to obtain further conclusions.

scholarly journals Population structure of Fagus grandifolia subsp. mexicana in the cloud forest of Hidalgo State, Mexico

2016 ◽  
Vol 94 (3) ◽  
pp. 483 ◽  
Author(s):  
Adriana Beatriz Ortiz-Quijano ◽  
Arturo Sánchez-González ◽  
Lauro López-Mata ◽  
José Villanueva-Díaz
Keyword(s):  
Population Structure ◽  
Community Structure ◽  
Environmental Conditions ◽  
Cloud Forest ◽  
Basal Area ◽  
Fagus Grandifolia ◽  
Species Level ◽  
Anthropogenic Activity ◽  
Recent Past ◽  
Beech Forests

The highest densities and largest areas of <em>Fagus grandifolia</em> subsp. <em>mexicana</em> in Mexico grow in the cloud forest of the state of Hidalgo. Although this taxon is endangered, there is little information about its population structure. This study provides data on the structure of heights, diameters and ages of <em>Fagus</em> in three populations in Hidalgo. Additionally, information was obtained on the structure of the beech forests, whose canopy is dominated by <em>Fagus</em>. At each locality, three to five 400 m<sup>2</sup> sample plots, depending on the size of the respective forest, were randomly selected. Within each plot, density and basal area of each species of tree and shrub with diameter greater than 2.5 cm (1.30 m) were estimated. At the species level, populations are dynamic, with a high percentage of young individuals; however, at one of the localities, changes have occurred in the last decade due to anthropogenic activity, and the structure of sizes and diameters in the youngest age categories has changed. Diameter was a good indicator of the age of the trees. At the community level, the dominance of <em>Fagus</em> and other species differed between localities, which is probably related to the degree of disturbance. Population and community structure are related and could be considered as indicators of changes in environmental conditions in the recent past and today.

scholarly journals Anthropogenic flash floods and climate change in rural Zimbabwe: Impacts and options for adaptation

2021 ◽  
Vol 21 ◽  
pp. 809-819
Author(s):  
Shingirai Mugambiwa ◽  
Jabulani Makhubele
Keyword(s):  
Climate Change ◽  
Rural Communities ◽  
Review Paper ◽  
Global Climate ◽  
Anthropogenic Activities ◽  
Flash Floods ◽  
Recent Past ◽  
Subsistence Economy ◽  
Water Hazards ◽  
Adaptation Options

Zimbabwe has been affected by numerous floods-related disasters in the recent past. These disasters often left rural communities in difficult socioeconomic situations. Floods are among the major water-related hazards and natural disasters worldwide. They are associated with excess rainfall, resulting in river overflow due to climate change . Developing countries constitute a large number of losses caused by water hazards. Thereby, in these countries, the vulnerabilities of households that depend on rain fed agriculture and livestock production for their livelihoods increases. This review paper seeks to establish the association between anthropogenic flash floods and climate change and unearth the impacts; vulnerabilities and adaptation options associated with anthropogenic flash floods in rural Zimbabwe. The study found that numerous anthropogenic activities perpetuate an increase in flood risk. These include littering, river or dam regulation measures, intensified land use and emissions of greenhouse gases, which subsequently result in global climate change. The impacts of flash floods established in the study include drought, food insecurity, displacements, malnutrition and severe effects on subsistence economy. The study concluded that even though most rural communities in Zimbabwe are vulnerable to the effects of floods, they have devised numerous diverse adaptation strategies to cope with the changes in the environment.

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