Results 51 to 60 of about 393,837 (280)

Dental crown morphological variation and heterodonty in carcharhiniform sharks

The Anatomical Record, EarlyView.
Abstract Elasmobranch teeth are highly mineralized structures that constitute the majority of the fossil record for this group. Despite their taxonomic and evolutionary significance, detailed descriptions of dental morphology remain scarce. The order Carcharhiniformes, the most diverse among sharks, comprises 304 valid species that display remarkable ...
Flávia Zanini, Karla D. A. Soares
wiley   +1 more source

Revisiting the multidecadal variability of North Atlantic Ocean circulation and climate

Frontiers in Marine Science
The World Ocean’s surface, particularly in the North Atlantic, has been heating up for decades. There was concern that the thermohaline circulation and essential climate variables, such as the temperature and salinity of seawater, could undergo ...
Alexey Mishonov, Alexey Mishonov, Dan Seidov, James Reagan   +3 more
doaj   +1 more source

Ocean impact on decadal Atlantic climate variability revealed by sea-level observations [PDF]

, 2015
Decadal variability is a notable feature of the Atlantic Ocean and the climate of the regions it influences. Prominently, this is manifested in the Atlantic Multidecadal Oscillation (AMO) in sea surface temperatures. Positive (negative) phases of the AMO
AH Sallenger Jr, BB Booth, C Wunsch, CO Iselin, CS Bretherton, CS Meinen, DA Smeed, DL Hodson, GD McCarthy, HL Bryden, J Marshall, J Robson, J Yin, JD Boon, JP Grist, P Thompson, R Montgomery, R Zhang, RJ Bingham, RT Sutton, S Gulev, S Häkkinen, S Østerhus, SB Goldenberg, T Ezer, T Kanzow, TL Delworth, W Ebisuzaki, W Sturges, WE Johns, X Chen   +30 more
core   +3 more sources

A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin)

The Anatomical Record, EarlyView.
Abstract The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic ...
Larissa de Souza Ribeiro, Marco Aurélio Gallo de França   +1 more
wiley   +1 more source

Atlantic origin of the arctic biota? Evidence from phylogenetic and biogeographical analysis of the cheilostome bryozoan genus pseudoflustra. [PDF]

PLoS ONE, 2013
The intricate geological evolution of the Arctic Ocean is paralleled by complexities in the biogeographical and phylogenetical histories of the Arctic biota, including bryozoans. Here we present revised taxonomic descriptions for all known species of the
Piotr Kuklinski, Paul D Taylor, Nina V Denisenko, Björn Berning   +3 more
doaj   +1 more source

Speleothem Paleoclimatology for the Caribbean, Central America, and North America [PDF]

, 2019
Speleothem oxygen isotope records from the Caribbean, Central, and North America reveal climatic controls that include orbital variation, deglacial forcing related to ocean circulation and ice sheet retreat, and the influence of local and remote sea ...
Arienzo, Monica M., Lachniet, Matthew, Oster, Jessica L., Sekhon, Natasha, Warken, Sophie F.   +4 more
core   +2 more sources

Gleaning the Rocky Shore? 2500 Years of Coastal Resource Use at Red Bluff 1, GunaiKurnai Country, SE Australia

Archaeology in Oceania, EarlyView.
ABSTRACT Shell middens in Gippsland along the eastern half of Victoria's coastline have usually been characterised as small, short‐duration camp sites with relatively low shell densities and low taxonomic diversity. Here we present new excavation results from a dense, high‐diversity site at Red Bluff near the eastern end of GunaiKurnai Country, a ...
Patrick Faulkner, Bruno David, David M. Kennedy, Fiona Petchey, Joanna Fresløv, Ashleigh J. Rogers, Jillian Garvey, Rachel Kirby, Runjie Yuan, Russell Mullett, John Stanisic, Kyne Krusic‐Golub, V. Ruth Pullin, Matthew C. McDowell, Robert J. Skelly, Anthony Romano, Vanessa N. L. Wong, GunaiKurnai Land and Waters Aboriginal Corporation   +17 more
wiley   +1 more source

An Ocean Memory Perspective: Disentangling Atmospheric Control of Decadal Variability in the North Atlantic Ocean

Geophysical Research Letters
An ocean memory framework is proposed to reveal the atmosphere's influence on ocean temperatures. Anomalous atmospheric forcing alters the ocean state through two mechanisms: short‐term, local effects involving air−sea heat fluxes and Ekman circulation ...
Hemant Khatri, Richard G. Williams, Tim Woollings, Doug M. Smith   +3 more
doaj   +1 more source

Extralimital sightings of a gray whale in the western North Atlantic

Endangered Species Research
Gray whales Eschrichtius robustus are High Arctic migrants that primarily inhabit the North Pacific Ocean. Gray whales have been extirpated from the North Atlantic Ocean since at least the middle of the 18th century.
O O’Brien, K Laemmle, KA Jackson, KR McKenna, S Hsu, JV Redfern   +5 more
doaj   +1 more source

A review of the historic and present ecological role of aquatic and shoreline wood, from forest to deep sea

Biological Reviews, EarlyView.
ABSTRACT The ecology of forests, their losses, and terrestrial wood decomposition dynamics have been intensively studied and reviewed. In the aquatic realm, reviews have concentrated on large wood (LW) in rivers and the transition from freshwater to marine environments in the Pacific Northwest of North America. However, a comprehensive global synthesis
Jon Dickson, Ellen Wohl, Laura L. Govers, Oscar Franken, Tjeerd J. Bouma, Han Olff, Britas Klemens Eriksson, Maryann S. Watson, Luísa M.S. Borges, Tjisse van der Heide   +9 more
wiley   +1 more source