Results 101 to 110 of about 112,938 (316)

Subglacial landscape formation and sediment discharge: relating basal conditions to bedform dimensions and properties at Rutford Ice Stream, West Antarctica

Boreas, EarlyView.
Basal conditions that facilitate fast ice flow are still poorly understood and their parameterization in ice‐flow models results in high uncertainties in ice‐flow and consequent sea‐level rise projections. Direct observations of basal conditions beneath modern ice streams are limited due to the inaccessibility of the bed.
Rebecca Schlegel, Lucas K. Zoet, Adam D. Booth, Andrew M. Smith, Roger A. Clark, Alex M. Brisbourne   +5 more
wiley   +1 more source

Microalgal community structure and primary production in Arctic and Antarctic sea ice: A synthesis

, 2018
Sea ice is one the largest biomes on earth, yet it is poorly described by biogeochemical and climate models. In this paper, published and unpublished data on sympagic (ice-associated) algal biodiversity and productivity have been compiled from more than ...
M. A. Leeuwe, L. Tedesco, K. Arrigo, P. Assmy, K. Campbell, K. Meiners, Janne-Markus Rintala, V. Selz, D. Thomas, J. Stefels   +9 more
semanticscholar   +1 more source

The role of shallow banks and marine ice domes in marine‐based ice‐sheet deglaciation

Boreas, EarlyView.
Marine‐based ice sheets are susceptible to collapse and faster retreat than their land‐terminating counterparts. One of the key factors contributing to the relative stability of marine‐terminating ice sheets is the presence of shallow bathymetric banks and islands acting as pinning points for the ice sheet.
Bartosz Kurjanski, Brice R. Rea, Matteo Spagnolo   +2 more
wiley   +1 more source

Use of LiDAR to derive a new model of glacial hydro‐dynamic events shaping southern Ontario landscapes, Canada

Boreas, EarlyView.
High‐resolution LiDAR data with field validation of inferred southern Ontario ice stream terrains indicate that steady‐state ice streaming is difficult to reconcile with our observations. Rather, these new observations show strong evidence of significant fluvial scouring across the area in which meltwater sheet flow overtopped the landscape.
David R. Sharpe, Chris C. Smart
wiley   +1 more source

Measuring juvenile habitat quality for fishes and invertebrates

Biological Reviews, EarlyView.
ABSTRACT Identifying the role of marine and estuarine habitats in supporting fish and invertebrate populations during vulnerable juvenile life stages is essential to achieve effective conservation and fisheries management. There remains general agreement that: (i) the quality of juvenile habitat is best measured as the contribution of juveniles to ...
Benjamin J. Ciotti, Elliot J. Brown, Francesco Colloca, David B. Eggleston, A. Challen Hyman, Olivier Le Pape, Romuald N. Lipcius, Margot A. M. Maathuis, Suzanne S. H. Poiesz, Kenneth A. Rose, Rochelle D. Seitz, Daniele Ventura, Karen E. van de Wolfshaar   +12 more
wiley   +1 more source

Biological invasions: a global assessment of geographic distributions, long‐term trends, and data gaps

Biological Reviews, EarlyView.
ABSTRACT Biological invasions are one of the major drivers of biodiversity decline and have been shown to have far‐reaching consequences for society and the economy. Preventing the introduction and spread of alien species represents the most effective solution to reducing their impacts on nature and human well‐being.
Hanno Seebens, Laura A. Meyerson, David M. Richardson, Bernd Lenzner, Elena Tricarico, Franck Courchamp, Alla Aleksanyan, Emre Keskin, Hanieh Saeedi, Perpetra Akite, Jake M. Alexander, Sarah A. Bailey, Dino Biancolini, Tim M. Blackburn, Hans Juergen Boehmer, Alejandro Bortolus, Marc W. Cadotte, César Capinha, James T. Carlton, Jo Anne Crouch, Curtis C. Daehler, Franz Essl, Llewellyn C. Foxcroft, Jason D. Fridley, Nicol Fuentes, Mirijam Gaertner, Bella Galil, Emili García‐Berthou, Pablo García‐Díaz, Sylvia Haider, Liam Heneghan, Kevin A. Hughes, Cang Hui, Ekin Kaplan, Andrew M. Liebhold, Chunlong Liu, Elizabete Marchante, Hélia Marchante, Alicia Marticorena, David W. Minter, Rodrigo A. Moreno, Wolfgang Nentwig, Aidin Niamir, Ana Novoa, Ana L. Nunes, Aníbal Pauchard, Sebataolo Rahlao, Anthony Ricciardi, James C. Russell, K.V. Sankaran, Anna Schertler, Evangelina Schwindt, Ross T. Shackleton, Daniel Simberloff, David L. Strayer, Alifereti Tawake, Marco Thines, Cristóbal Villaseñor‐Parada, Jean Ricardo Simões Vitule, Viktoria Wagner, Victoria Werenkraut, Karsten Wesche, Demian A. Willette, Rafael D. Zenni, Petr Pyšek   +64 more
wiley   +1 more source

Phylogeography of the Anaspides richardsoni species clade (Anaspidacea, Anaspidesidae): glaciation and recolonization of the Tasmanian Central Plateau and the question of paraphyletic species

Cladistics, EarlyView.
Abstract We herein present a phylogenetic and population genetic analysis of a Tasmanian Mountain Shrimp clade, based on ddRAD and cytochrome oxidase subunit‐1 data sets. Our data show that the morphologically well‐delineated and widespread Anaspides richardsoni Ahyong, 2016 is paraphyletic with respect to four other species (A. eberhardi Ahyong, 2016,
Christoph G. Höpel, Shane T. Ahyong, Martin Kapun, Martin Schwentner, Stefan Richter   +4 more
wiley   +1 more source

Rapid Decline of Total Antarctic Sea Ice Extent during 2014–16 Controlled by Wind-Driven Sea Ice Drift

Journal of Climate, 2019
Between 2014 and 2016 the annual mean total extent of Antarctic sea ice decreased by a record, unprecedented amount of 1.6 × 106 km2, the largest in a record starting in the late 1970s. The mechanisms behind such a rapid decrease remain unknown.
Zhaomin Wang, J. Turner, Yang Wu, Chengyan Liu   +3 more
semanticscholar   +1 more source

Emergence, spread, and impact of high‐pathogenicity avian influenza H5 in wild birds and mammals of South America and Antarctica

Conservation Biology, EarlyView.
Abstract The currently circulating high‐pathogenicity avian influenza (HPAI) virus of the subtype H5 causes variable illness and death in wild and domestic birds and mammals, as well as in humans. This virus evolved from the Goose/Guangdong lineage of the HPAI H5 virus, which emerged in commercial poultry in China in 1996, spilled over into wild birds,
Thijs Kuiken, Ralph Eric Thijl Vanstreels, Ashley Banyard, Lineke Begeman, Andrew C. Breed, Meagan Dewar, Ruben Fijn, Patricia Pereira Serafini, Marcela Uhart, Michelle Wille   +9 more
wiley   +1 more source

Report on the geomorphological survey in the Soya Coast (JARE-61)

Antarctic Record, 2020
The Antarctic Ice Sheet is a major source of future sea-level rise due to global warming. Reconstruction of the past Antarctic Ice Sheet is essential to understand the mechanism of the Antarctic Ice Sheet response to global and regional climate changes ...
Takeshige Ishiwa, Yuki Tokuda, Takuya Itaki, Satoshi Sasaki   +3 more
doaj   +1 more source