Results 81 to 90 of about 1,738,277 (218)

Migrating subaqueous dunes capture clay flocs

Communications Earth & Environment
Abstract Recent research highlights the abundance of floccule (flocs) in rivers, formed by the aggregation of clay particles with organic matter. These flocs affect the transport and eventual fate of clay. Flocs exhibit distinct behaviour from their unflocculated sedimentary counterparts: they can deform and break, and have higher settling ...
Sjoukje I. de Lange, Anne van der Wilk, Claire Chassagne, Waqas Ali, Maximilian P. Born, Kristian Brodersen, Antonius J. F. Hoitink, Kryss Waldschläger   +7 more
openaire   +4 more sources

Biocrust restoration in novel climates: assisted migration, habitat amelioration, and varied community composition as climate‐smart techniques

Restoration Ecology, EarlyView.
Abstract Introduction Successful restoration of terrestrial drylands depends on stable, fertile soils that retain water. These functions are provided by biological soil crusts (biocrust), suggesting their reestablishment is a critical step in dryland restoration.
Colin Tucker, Anita Antoninka, Matthew A. Bowker, Sasha C. Reed   +3 more
wiley   +1 more source

Dune fields in Jericoacoara: human intervention as a possible indicator of changes in the morphological dynamics

Confins, 2018
Coastal dunes play an important role in the sediment transport of the coastal zone. The morphology of the Jericoacoara National Park in the northeastern Brazilian state of Ceará consists of a headland covered by a mobile dune field consisting of large ...
Antonio Jeovah Meireles, Adryane Gorayeb, Narcélio de Sá Pereira Filho   +2 more
doaj   +1 more source

Integrating natural baselines into ecosystem restoration: scaling herbivore targets for European landscapes

Restoration Ecology, EarlyView.
Abstract Introduction Herbivore‐mediated ecosystem processes are fundamental to biodiversity, yet have been greatly diminished by megafauna extinctions and replacement of wild herbivores by managed livestock. With increasing restoration ambitions—including the United Nations' (UN) Decade on Ecosystem Restoration and the European Union (EU) Nature ...
Camilla Fløjgaard, Robert Buitenwerf, Alessandro Chiarucci, Martin Konvička, Rasmus Mohr Mortensen, Norman Owen‐Smith, Deli Saavedra, Jens‐Christian Svenning, Rasmus Ejrnæs   +8 more
wiley   +1 more source

Seasonal variations in airflow over the Namib Dune, Gale Crater, Mars: Implications for dune dynamics [PDF]

, 2018
Dune length scale airflow modelling provides new insights on aeolian bedform response and complex near surface 3D wind patterns not previously resolved by mesoscale models.
Derek W. T. Jackson, Cornwall, Carin, Mary C. Bourke, Bourke, Mary, Meiring Beyers, Beyers, Meiring, J. Andrew G. Cooper, Carin Cornwall, Jackson, DWT; id_orcid, Cooper, Andrew; id_orcid   +9 more
core   +1 more source

Diversity of Coastal Vegetation along Cuddalore District of Tamil Nadu

Madras Agricultural Journal, 2017
The sand dunes in coastal regions of Cuddalore are important ecosystems because of their small size, the rare species found in this habitat, and the beautiful landscapes they create.
M.P. Sugumaran, S.Avudainayagam
doaj   +1 more source

Rethinking microtidal systems: Tidal signatures in the fluvial deposits of the Po River, Italy

Sedimentology, EarlyView.
ABSTRACT In microtidally influenced rivers, tides are generally assumed to leave virtually no signatures in the sedimentary record. However, this hypothesis has been surprisingly poorly tested using modern river analogues, which provide an opportunity to assess whether sedimentary signatures of microtidal regimes can develop in rivers that lack ...
Anna E. van Yperen, Alvise Finotello, Riccardo Maitan, Ivar Midtkandal, Fabrizio Nestola, Davide Tognin, Massimiliano Ghinassi   +6 more
wiley   +1 more source

Numerical simulation study of proppant transport in complex hydraulic fractures

Youqi dizhi yu caishoulu
During the hydraulic fracturing construction of unconventional reservoirs， hydraulic fractures easily intersect with natural fractures to form complex fractures.
ZHANG Tao, JIAN Yinlin, HE Le, LIANG Tiancheng, WANG Fei   +4 more
doaj   +1 more source

Drowned carbonate‐rimmed margin controlling shelf‐edge delta progradation and sedimentation dynamics: Upper Cretaceous Woodbine Formation, Texas, USA

Sedimentology, EarlyView.
ABSTRACT Shelf‐edge deltas are commonly interpreted to record basinward facies migration across uninterrupted, gently dipping shelf margins; however, examples from mixed siliciclastic‐carbonate margins reveal more complex depositional dynamics. Periods and areas of carbonate sedimentation within mixed siliciclastic‐carbonate margins can modify shelf ...
Abdulkarim Al‐Hussaini, Cornel Olariu, Charles Kerans, Ronald Steel   +3 more
wiley   +1 more source

Morphodynamic analysis of longitudinal dunes and geomorphological risk assessment for development planning in the southeastern Qattara Depression using geospatial techniques

Geomatics, Natural Hazards & Risk
The southeastern Qattara Depression is a geomorphologically active region of Egypt’s Western Desert, where longitudinal dune fields intersect major development corridors, including the New Delta Project and petroleum concessions.
Eltaher M. Shams, Sahar N.E. Tawfik, Mohamed R. Abdelzaher, Rashad Sawires   +3 more
doaj   +1 more source