Results 41 to 50 of about 1,738,277 (218)

Secondary flow deflection in the lee of transverse dunes with implications for dune morphodynamics and migration

Earth Surface Processes and Landforms, 2013
ABSTRACTMeasurements of lee‐side airflow response from an extensive array of meteorological instruments combined with smoke and flow streamer visualization is used to examine the development and morphodynamic significance of the lee‐side separation vortex over closely spaced transverse dune ridges.
Walker, Ian J., Shugar, Dan H.
openaire   +3 more sources

Synergistic Regulation of Soil Function and Wind Erosion Resistance by Sand Barriers, Vegetation, and Artificial Biological Crust in the Tengger Desert

Land Degradation &Development, EarlyView.
ABSTRACT Aeolian desertification poses a critical threat to ecosystem stability in arid regions worldwide. Although the combination of sand barriers and vegetation has been widely applied for sand fixation, its long‐term effectiveness is constrained by barrier degradation, slow natural development of biological soil crusts (BSCs), and the resulting ...
Bin Pan, Chen Meng
wiley   +1 more source

Establishing Vegetation on Migrating Inland Sand Dunes in Texas [PDF]

Rangeland Ecology & Management, 2006
Migration of sand dunes damages range improvements in the Texas Coastal Sand Plain. We determined effects of mulching with native prairie hay and an open weave geotextile fabric, seeding, fertilization, and transplanting on plant species canopy cover on inland sand dunes. We compared applying native hay vs.
Timothy E. Fulbright, J. Alfonso Ortega-Santos, Alejandro Lozano-Cavazos, Luis Enrique Ramírez-Yanez   +3 more
openaire   +2 more sources

Migration and Morphology of Asymmetric Barchans in the Central Hexi Corridor of Northwest China

Geosciences, 2018
Crescent-shaped barchan dunes often display an asymmetric shape, with one limb longer than the other. As shown in previous studies, asymmetric bimodal winds constitute one major cause of barchan asymmetry, but the heterogeneous conditions of sand ...
Zhengcai Zhang, Zhibao Dong, Guangyin Hu, Eric J. R. Parteli   +3 more
doaj   +1 more source

Mobile consumers influence the shoreward edge of intertidal seagrass ecosystems

Journal of Animal Ecology, EarlyView.
Ecological paradigms suggest that the environmentally stressful edge of a habitat is determined by physical factors. The work finds that, counter to these paradigms, an environmentally stressful edge can also be impacted by biotic interactions and are more complex than suggested.
Stephanie R. Valdez, Carter S. Smith, Catherine L. Brenner, Avery B. Paxton, Brian R. Silliman   +4 more
wiley   +1 more source

The migration-security nexus. International migration and security before and after 9/11 [PDF]

, 2003
Faist T. The migration-security nexus. International migration and security before and after 9/11. COMCAD Arbeitspapiere - working papers, 9.
Thomas Faist, Faist, Thomas
core   +1 more source

Critical constraints to ecological buffering in a rapidly changing Arctic: A long‐term seabird study

Journal of Animal Ecology, EarlyView.
Drawing on two decades of research in East Greenland, this study shows that little auks, key seabird indicators of Arctic ecosystem health, can adapt to rapid environmental change through behavioural flexibility. However, increasing storms and mercury pollution are pushing resilience to its limits, providing an early warning of broader Arctic ...
David Grémillet, Françoise Amélineau, Ann M. A. Harding, Jérôme Fort   +3 more
wiley   +1 more source

Quantifying Transgressive Coastal Changes Using UAVs: Dune Migration, Overwash Recovery, and Barrier Flooding Assessment and Interferences with Human and Natural Assets

Journal of Marine Science and Engineering, 2023
The advantages derived from the use of Uncrewed Aerial Vehicles (UAVs) are well-established: they are cost-effective and easy to use. There are numerous environmental applications, particularly when monitoring contexts characterized by rapid ...
Giulia Casagrande, Annelore Bezzi, Saverio Fracaros, Davide Martinucci, Simone Pillon, Paolo Salvador, Stefano Sponza, Giorgio Fontolan   +7 more
doaj   +1 more source

Host‐mediated filtering and interspecific associations structure strongyle parasite communities in Sable Island horses

Journal of Animal Ecology, EarlyView.
Using individual‐level nemabiome metabarcoding of 3147 samples from 916 horses on Sable Island over 10 years, we generate the largest dataset of its kind to date. This unprecedented scale enables a rare test of the processes structuring parasite communities in a natural system, revealing dominant host‐mediated filtering and predominantly positive ...
Sangwook Ahn, Philip D. McLoughlin, Jocelyn Poissant   +2 more
wiley   +1 more source

Aeolian Geomorphology of Ergs and Dunefields in Iran. [PDF]

Desert
Iran's geographical location causes the majority of the country to be semi-arid, arid, or hyper-arid. The existence of ergs and dunefields in the central and eastern parts of Iran has caused residential areas and all kinds of land use to be affected by ...
Mehran Maghsoodi, Hamid Ganjaeian
doaj   +1 more source