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Now showing items 21-30 of 36
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 ...
Framework of basin eco-compensation standard valuation for cross-regional water supply – a case study in northern China
(
Elsevier
, 2020 , Article)
Basin eco-compensation (BEC) helps balance development opportunities and ecological protection. With rising demand for water and severe ecological problems driven by rapid economic growth, an appropriate BEC standard is ...
Relative contribution of plant traits and soil properties to the functioning of a temperate forest ecosystem in the Indian Himalayas
(
Elsevier
, 2020 , Article)
© 2020 Elsevier B.V. Plant-soil interactions are a major determinant of changes in forest ecosystem processes and functioning. We conducted a trait-based study to quantify the contribution of plant traits and soil properties ...
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 ...
WorldView-3 mapping of Tarmat deposits of the Ras Rakan Island, Northern Coast of Qatar: Environmental perspective
(
Elsevier
, 2021 , Article)
This study characterizes the spectral behavior of tarmats and maps the tarmat deposits found along the coast of Ras Rakan Island off Qatar using WorldView-3 (WV-3) sensor data. The laboratory spectra of tar materials showed ...
Seismic detection and characterization of a man-made karst analog - A feasibility study
(
Society of Exploration Geophysicists
, 2021 , Article)
At the site of a water drainage shaft on the campus of Qatar University that serves as a man-made karst analog, two seismic imaging techniques were adapted to use resonant scattered waves recorded during active-source ...
Comprehensive pore size characterization of Midra shale
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Elsevier B.V.
, 2021 , Article)
Although the Middle East's carbonate reservoirs were the first and most studied rocks in the world, Middle Eastern shale reservoirs are still poorly understood compared with other unconventional formations in the US. We ...
Characterizing fracture toughness using machine learning
(
Elsevier B.V.
, 2021 , Article)
The existing models for fracture toughness characterization based on nanoindentations that account for the fracture length are limited to simple (ideal) geometries that are absent in shales. The present study proposes two ...
Geochemical characterization and origin of the Cretaceous Sa’di, Khasib, Mishrif, and Nahr Umr Crude Oils in Halfaya Oilfield, Southern Mesopotamian Basin, Iraq
(
Taylor and Francis Ltd.
, 2021 , Article)
A suite of crude oil samples from the Cretaceous reservoirs in Halfaya Oilfield, Southern Iraq were analyzed using organic geochemistry analysis to study their geochemical characterization and origin. High sulfur content ...
Methylmercury bioaccumulation among different food chain levels in the EEZ of Qatar (Arabian Gulf)
(
Elsevier
, 2020 , Article)
Methylmercury (MeHg) concentrations in three different species from different trophic levels with different amounts of Hg exposures were determined for the first time in the EEZ of Qatar. Sampling was conducted during ...