Environmental Science Center: المرسلات الحديثة
السجلات المعروضة 261 -- 280 من 469
-
Determination of total flavonoid content by aluminum chloride assay: A critical evaluation
( Elsevier , 2021 , Article)Flavonoids are important natural bioactive compounds. Quantitation of total flavonoid content (TFC) is widely performed using the aluminum chloride colorimetric assay against a flavonoid standard assuming equal responses ... -
Severe vegetation degradation associated with different disturbance types in a poorly managed urban recreation destination in Iran
( Springer Nature , 2021 , Article)Recreational activities worldwide have major impacts on the environment. This study examined the impact of different kinds of recreational activities on plant communities in a highly visited park in Mashhad, Iran. Vegetation ... -
Changes in plant composition and diversity in an alpine heath and meadow after 18 years of experimental warming
( Springer , 2021 , Article)Global warming is expected to have large impacts on high alpine and Arctic ecosystems in the future. Here we report effects of 18 years of experimental warming on two contrasting high alpine plant communities in subarctic ... -
Diversity of arbuscular mycorrhizal fungi and its chemical drivers across dryland habitats
( Springer , 2021 , Article)Qatar is largely characterized by a hyper-arid climate and low soil fertility which create a stressful soil environment for arbuscular mycorrhizal (AM) fungi. In a study of AM fungal communities and their relationship with ... -
Litter decomposition above the treeline in alpine regions: A mini review
( Elsevier , 2021 , Article)Litter decomposition is a key driver of ecosystem processes and carbon cycling. Decomposition rate is influenced by numerous factors, such as temperature, humidity, litter properties, soil properties, and properties of ... -
Optimal Water-Fertilizer Combinations for Efficient Nitrogen Fixation by Sugarcane at Different Stages of Growth
( MDPI , 2021 , Article)High fertilizer application and over-irrigation in sugarcane systems can cause considerable N2O emissions. Optimized water-fertilization management which reduces N2O emissions, while maintaining sugarcane biomass, is ... -
Spatial variability of summer hydrography in the central Arabian Gulf
( Elsevier , 2021 , Article)The Arabian Gulf is a very significant ocean body, which hosts more than 55% of the oil reserves of the world and produces about 30% of the total production, and thus, it is likely to face high risk and adverse problems ... -
Towards Sustainable Management of Coastal and Offshore Islands in Arabian Gulf Typology: Sensitivity Analysis, Ecological Risk Assessment of Halul and Al-Alyia Islands
( Qatar University Press , 2021 , Poster)The great majority of marine ecosystems in Qatar are in fast decline and nearing collapse, where most ecosystem has lost the biological and economic functionality. Aiming to support the decision makers in the management ... -
Assemblage of encrusting organisms on floating marine debris along the west coast of Qatar
( Qatar University Press , 2021 , Poster)The floating marine debris (FMD) and the associated rafting communities are one of the major stressors to ecosystem services, global biodiversity, economy, and human health. In this study, assemblages of encrusting organisms ... -
Lithologic Characterization and Micropore Structures of Gas Shale Strata: An example from the Midra Shale of Western Qatar
( Qatar University Press , 2021 , Poster)Gas shale is the future hydrocarbon reservoir of Qatar. The Qatari geologic section has had important successions of gas shale at different geologic times including the Eocene Midra shale, the Cretaceous Ratawi and Nahr ... -
Investigating the concomitant removal of hydrocarbons and heavy metals by highly adapted Bacillus and Pseudomonas strains
( Qatar University Press , 2021 , Poster)This study investigates the concomitant removal of hydrocarbons and heavy metals by highly adapted Bacillus and Pseudomonas strains. In regions characterized by harsh conditions such as Qatar, the weathering processes would ... -
Distribution, characterization and weathering of tarmats along the west coast of Qatar
( Qatar University Press , 2021 , Poster)Oil residue in the form of tarmat (TM) deposited on the coast of Arabian Gulf countries is a major environmental concern. In this study, the current TM pollution trend along the west coast of Qatar has been assessed and ... -
Microplastics in the beach sediments around the Ras Rakan Island, Qatar
( Qatar University Press , 2021 , Poster)The ubiquitous microplastic (MP) pollution is an emerging environmental issue in the marine environment. In this study, historical accumulation trends of MPs in the beach sediments around the Ras Rakan Island of Qatar have ... -
Preliminary Investigation of Heavy Metals in Deposited Dust on Roadside Sidr Leaves
( Qatar University Press , 2021 , Poster)Urban pollution has different forms; one of them is air pollution by natural sources such as dust storms or by anthropogenic sources such as traffic, whereas both are considered among the most risky environmental problems ... -
Oil Spill Index (OSI) to Sentinel-2 satellite data: QU in International Contribution
( Qatar University Press , 2021 , Poster)An Oil Spill Index (OSI = (B3+B4)/B2) was developed and applied to Sentinel-2 optical satellite data of the European Space Agency (ESA) to map marine oil spills using spectral absorption characters of spectral bands of the ... -
Origin of TPHs and PAHs in the marine sediment nearby oil and gas extraction sites on the west coast of Qatar
( Qatar University Press , 2021 , Poster)Total Petroleum Hydrocarbons (TPHs) and Polycyclic Aromatic Hydrocarbons (PAHs) are priority pollutants, which are known to be associated with petroleum products. They are released into the marine environment via accidental ... -
The efficacy of two household cleaning and disinfecting agents on Lentil (Lens culinaris Medik) and Faba bean (Vicia faba) seed germination
( Qatar University Press , 2021 , Poster)A germination test of Vicia faba and Lens culinaris seeds under the effect of bleach and vinegar was conducted for seven days, and the observations were recorded daily. The completely randomized design (CRD) was used to ... -
Feminization of hawksbill turtle hatchlings in the twenty-first century at an important regional nesting aggregation
( Qatar University Press , 2021 , Poster)Projected climate change is forecasted to have significant effects on biological systems worldwide. Marine turtles in particular may be vulnerable, as the sex of their offspring is determined by their incubating temperature. ... -
Variability of Physical and Biogeochemical Parameters in the Exclusive Economic Zone of Qatar
( Qatar University Press , 2021 , Poster)The oceanographic data collected along a transect in the Exclusive Economic Zone (EEZ) of Qatar during late summer (September 2014) and winter (January 2015) have been analyzed to investigate the spatial and temporal ... -
Effect of Plant Growth Regulators on Callus Induction from Leaf and Petiole explants of Hummeid (Rumex Vesicarius)
( Qatar University Press , 2021 , Poster)Advancement in plant cell culture technology has permitted the increasing interest in harvesting plant metabolites from cell cultures. This technique is based on in vitro propagation of plant callus which contains many ...
