Results 111 to 120 of about 574,554 (206)

Small watersheds may play a disproportionate role in arctic land-ocean fluxes. [PDF]

Nat Commun, 2023
Vonk JE, Speetjens NJ, Poste AE.
europepmc   +1 more source

Bioreactivity of dissolved organic carbon in ponds of the ice-wedge polygonal tundra

Abstract. The role of ponds in transforming laterally exported dissolved organic matter (DOM) within polygonal landscapes affected by degrading ice-wedges remains poorly understood, despite their potential importance in carbon cycling. We hypothesized that the morphological and limnological diversity of ponds–driven by permafrost erosion and soil ...
Thomas Pacoureau, Milla Rautio, Isabelle Laurion   +2 more
openaire   +2 more sources

METTL14‐Mediated m6A Methylation Preserves Cardiomyocyte Homeostasis and Attenuates Progeria‐Associated Cardiac Remodeling

Aging Cell, Volume 25, Issue 10, October 2026.
Progerin accumulation downregulates the expression of m6A methyltransferases METTL3 and METTL14 in cardiac tissues, impairing m6A modification‐mediated regulation of target genes including Casq2, Ifna and Ifnb, leading to calcium signaling dysregulation and pro‐inflammatory activation in the aged heart.
Shixiao Wang, Jie Zhang, Ying Ao, Dan Rao, Cong Yu, Chenzhong Xu, Ming Wang, Mingying Li, Xin Huang, Jianfei Zhang, Rui Mei, Zhen Zhang, Jie Sun, Juanli Duan, Ying Sun, Zimei Wang, Wen Su, Baohua Liu   +17 more
wiley   +1 more source

Landscape patterns of carbon fluxes in natural and disturbed ice-wedge-polygon tundra

Arctic, Antarctic, and Alpine Research
The degradation of ice-rich permafrost ecosystems due to climate change and infrastructure development strongly impacts carbon exchange dynamics in tundra landscapes. This study investigates the effects of surficial geology and infrastructure disturbances from road dust and flooding on vegetation and trace gas fluxes in polygonal ice-wedge tundra in ...
Anja Kade, Donald A. Walker, Martha K. Raynolds, Amy L. Breen, Olivia M. Hobgood   +4 more
openaire   +2 more sources

Tracking hatchery and wild Atlantic salmon (Salmo salar) smolt during river exit and early marine migration to assess survival, predation risk and migration speed

Journal of Fish Biology, Volume 109, Issue 4, Page 2231-2247, October 2026.
Abstract Significant declines in Atlantic salmon (Salmo salar) populations across their range have prompted an increased use of hatchery supplementation programmes to support population recovery. However, concerns persist regarding the effectiveness of these programmes due to limited understanding of how hatchery‐reared salmon perform post‐release in ...
Natalie C. Koopman, David C. Hardie, Robert J. Lennox, Morgan L. Piczak, Frederick G. Whoriskey, Eric B. Brunsdon, Jeffrey A. Hutchings, Glenn T. Crossin   +7 more
wiley   +1 more source

Permafrost in the Cretaceous supergreenhouse. [PDF]

Nat Commun, 2022
Rodríguez-López JP, Wu C, Vishnivetskaya TA, Murton JB, Tang W, Ma C.   +5 more
europepmc   +1 more source

Polygons or polygonal ground

, 2015
Aerial view of Refuge. Polygons or Polygonal Ground in the Arctic Refuge.
USFWS
core  

Ectomycorrhizal Cortinariaceae species dominate class II peroxidase gene expression in a boreal forest soil

New Phytologist, Volume 252, Issue 1, Page 400-413, October 2026.
Share of transcripts and ITS2 sequence for each gene families among identified fungal contigs and OTUs. Summary Boreal forest ecosystems constitute a large terrestrial reservoir of carbon. In these nitrogen‐limited environments, release of nutrients through decomposition of soil organic matter is of fundamental importance.
Florian Barbi, Uwe Menzel, Domenico Simone, Tuula Niskanen, Björn D. Lindahl   +4 more
wiley   +1 more source

The Topology of Spaces of Polygons [PDF]

, 2011
We study the topology of spaces of polygons in Euclidean space, viewed up to translations. The main results concern the structure of the homology groups and of the cohomology rings of the spaces.
FROMM, VIKTOR
core  

Spatial and temporal evolution of a coastal erg margin: The Middle Jurassic Page Sandstone, southern Utah, USA

Sedimentology, Volume 73, Issue 6, Page 2081-2119, October 2026.
ABSTRACT Aeolian deflationary events are erosive to static stages where sediment supply is insufficient to support bedform migration and preservation in the rock record. In the vicinity of shallow‐marine environments, inland rises of relative water table and associated generation of deflationary super surfaces may be driven by the onset of ...
Victor J. P. Hême de Lacotte, Chester H. C. Davies, Briony J. Bowler, Stuart M. Clarke, Thomas J. H. Dodd   +4 more
wiley   +1 more source