Results 41 to 50 of about 9,517 (191)

The Unexpected Discovery of Paleocene? Coals in Outcrops Thought to Be Cambrian, Al Huqf, Oman

Journal of Petroleum Geology, EarlyView.
ABSTRACT Two brown organic deposits were encountered whilst investigating kaolinitic claystones thought to occur at the base of a Cambrian formation at outcrop. The age of these organic deposits is probably Paleocene from palynology. Organic petrography shows that they are subbituminous coals with some oil source potential.
Mohammed H. Al Kindi, Alan P. Heward, Lorraine B. Eglinton, Steve R. Packer, Darrin T. Stead   +4 more
wiley   +1 more source

Seasonal succession and niche differentiation in Skeletonema species driven by temperature and salinity in inner Tokyo Bay

Journal of Phycology, EarlyView.
Abstract The genus Skeletonema is a dominant diatom in coastal waters worldwide, frequently causing blooms, and it includes several cryptic species. To elucidate the occurrence patterns and niche differentiation among Skeletonema species in Tokyo Bay, Japan, sampling was conducted between June 2021 and February 2023.
Toshiya Katano, Tomohiro Suematsu, Ayane Tanaka, Saori Yasui‐Tamura, Fuminori Hashihama   +4 more
wiley   +1 more source

Unknown Extracellular and Bioactive Metabolites of the Genus Alexandrium: A Review of Overlooked Toxins

Toxins, 2021
Various species of Alexandrium can produce a number of bioactive compounds, e.g., paralytic shellfish toxins (PSTs), spirolides, gymnodimines, goniodomins, and also uncharacterised bioactive extracellular compounds (BECs).
Marc Long, Bernd Krock, Justine Castrec, Urban Tillmann   +3 more
doaj   +1 more source

Unveiling coralline diversity of mesophotic rhodoliths in subtropical Japan, including new species of Sporolithon, emended genera Orientalilithon and Roseolithon (Corallinophycidae, Rhodophyta)

Journal of Phycology, EarlyView.
Abstract The mesophotic zone off Tanegashima Island (approximately 30–40 m deep) is a marine macroalgal hotspot in subtropical Japan; however, the taxonomic diversity of calcifying red algal community remains poorly understood. Our phylogenetic analyses based on psbA, rbcL, and COI‐5P gene markers disclosed the presence of at least 12 rhodolith‐forming
Min‐Khant‐Kyaw, Masasuke Baba, Ryuta Terada, Aki Kato   +3 more
wiley   +1 more source

Deciphering the Neurotoxic Effects of Karenia selliformis

Toxins
Karenia selliformis is a globally recognized dinoflagellate associated with harmful algal blooms and massive fish kills along southern Chilean coasts. Its toxicity varies with environmental factors and genetic diversity. While K.
Ambbar Aballay-González, Jessica Panes-Fernández, Catharina Alves-de-Souza, Bernd Krock, Juan José Gallardo-Rodríguez, Nicole Espinoza-Rubilar, Jorge Fuentealba, Allisson Astuya-Villalón   +7 more
doaj   +1 more source

Morphology of Hobagella saltata n. gen. and n. sp. (Syndiniophyceae, Miozoa) infecting the marine dinoflagellate Cucumeridinium coeruleum (Dinophyceae, Miozoa) and its potential onshore advection

Frontiers in Marine Science
Over the past decade, molecular phylogenies have placed endoparasites of the genus Euduboscquella in a distinct subclade within clade 4 of the Marine Alveolate (MALV) Group I.
Jiae Yoo, Sunju Kim, D. Wayne Coats
doaj   +1 more source

Dinoflagellate Assemblages in the West Iberian Upwelling Region (Sagres, Portugal) During 1994–2001

Frontiers in Marine Science, 2022
Changes in the composition of dinoflagellates from 1994 to 2001 at a station influenced by wind-induced seasonal upwelling off SW Portugal were analyzed in relation to oceanography. 194 taxa of dinoflagellates were detected, the most frequent belonged to
Sergei Danchenko, Sergei Danchenko, Sergei Danchenko, John David Dodge, John David Icely, John David Icely, Alice Newton   +6 more
doaj   +1 more source

The Distribution and Diversity of Dinoflagellate Cysts in Sediments of Gwatar Bay (Northeast Gulf of Oman)

‬‭Majallah-i ̒Ilmī-i Shīlāt-i Īrān, 2015
Most dinoflagellate produce resting cysts during their sexual lifecycle as well as under unfavorable environmental conditions and from water column settle in the sediments substratum. The evaluation of diversity and distribution of dinoflagellate cysts
G. Attaran-Fariman email ; A. Raisi
doaj  

Heat‐evolved coral photosymbionts exhibit dampened stress responses across distinct physiological contexts

New Phytologist, EarlyView.
Summary Experimental evolution under elevated temperatures has generated heat‐evolved (HE) strains of Symbiodiniaceae that enhance coral bleaching tolerance. However, the biomolecular mechanisms underlying this resilience remain poorly understood. We conducted a laboratory heat‐stress experiment and applied synchrotron‐based Fourier transform infrared (
Bede G. Johnston, Madeline R. Garing, Annaleise R. Klein, Wing Yan Chan, Matthew R. Nitschke, Madeleine J. H. van Oppen   +5 more
wiley   +1 more source

Even a slight temperature increase triggers the inhibition of Symbiodiniaceae cell division and promotes cell expulsion in the coral Acropora selago

Phycological Research, EarlyView.
SUMMARY Coral bleaching, characterized by the loss of Symbiodiniaceae symbionts from corals, is promoted both by acute high‐temperature events and by prolonged moderate thermal stress. However, the mechanisms responsible for decreases in Symbiodiniaceae cell densities within corals remain unclear. Symbiodiniaceae cells within corals proliferate through
Hiroshi Yamashita, Masami Umeki, Go Suzuki, Kazuhiko Koike   +3 more
wiley   +1 more source