Results 21 to 30 of about 33,963 (268)

The North Pacific Diatom Species Neodenticula seminae in the Modern and Holocene Sediments of the North Atlantic and Arctic

open access: yesGeosciences, 2020
The paper presents micropaleontological information and observations of the North Pacific diatom species Neodenticula (N.) seminae (Simonsen and Kanaya) Akiba and Yanagisawa in the surface and Holocene sediments from the North Atlantic, Nordic, and ...
Alexander Matul, Galina Kh. Kazarina
doaj   +1 more source

The Bolivian Radiocarbon Database: A Countrywide Compilation of Radiocarbon Dates

open access: yesJournal of Open Archaeology Data, 2023
The radiocarbon dating record from sites in the territory that comprises the Plurinational State of Bolivia has been previously included in datasets that are either obsolete, inaccurate, or incomplete.
José M. Capriles
doaj   +1 more source

Comparison of two reef sites on the north coast of Jamaica over a 15-year period [PDF]

open access: yes, 2016
This paper compares two reef sites near Discovery Bay, Jamaica, Dairy Bull and Dancing Lady, from 2000 to 2015. At Dairy Bull reef, with low macroalgal cover (8% in 2002 falling to 1% in 2015) and significant number of Diadema antillarum urchins (c.
Crabbe, M. James C.
core   +1 more source

INTEMPERISMO DECORRENTE DA ACUMULAÇÃO DE SAL E A FORMAÇÃO DE ALVÉOLOS E TAFONI NOS AFLORAMENTOS DAS PRAIAS DE NITERÓI (RIO DE JANEIRO, BRASIL)

open access: yesRevista Brasileira de Geomorfologia, 2013
Afloramentos de granitos e gnaisses nas praias de Niterói (RJ) apresentam morfologias desenvolvidas em decorrência do intemperismo da acumulação de sal na superfície da rocha.
Maria Augusta Martins da Silva   +6 more
doaj   +1 more source

Osteology and relationships of Rhinopycnodus gabriellae gen. et sp. nov. (Pycnodontiformes) from the marine Late Cretaceous of Lebanon [PDF]

open access: yes, 2013
The osteology of Rhinopycnodus gabriellae gen. and sp. nov., a pycnodontiform fish from the marine Cenomanian (Late Cretaceous) of Lebanon, is studied in detail.
Capasso, Luigi, Taverne, Louis
core   +3 more sources

Análisis palinológico preliminar de una turbera holocena del Apakará-tepui (Macizo de Chimantá, Guayana venezolana)

open access: yesCollectanea Botanica, 2011
Análisis palinológico preliminar de una turbera holocena del Apakará-tepui (Macizo de Chimantá, Guayana venezolana).- Este artículo presenta los resultados palinológicos preliminares, a escala de milenios, de una secuencia holocena, desde 8.0 cal kyr BP ...
V. Rull, E. Montoya, S. Nogué, O. Huber
doaj   +1 more source

Testate Amoeba Functional Traits and Their Use in Paleoecology

open access: yesFrontiers in Ecology and Evolution, 2020
This review provides a synthesis of current knowledge on the morphological and functional traits of testate amoebae, a polyphyletic group of protists commonly used as proxies of past hydrological changes in paleoecological investigations from peatland ...
Katarzyna Marcisz   +20 more
doaj   +1 more source

Collapse of the mammoth-steppe in central Yukon as revealed by ancient environmental DNA

open access: yesNature Communications, 2021
‘The timing and ecological dynamics of extinction in the late Pleistocene are not well understood. Here, the authors use sediment ancient DNA from permafrost cores to reconstruct the paleoecology of the central Yukon, finding a substantial turnover in ...
Tyler J. Murchie   +10 more
doaj   +1 more source

Sedimentary Ancient DNA (sedaDNA) Reveals Fungal Diversity and Environmental Drivers of Community Changes throughout the Holocene in the Present Boreal Lake Lielais Svētiņu (Eastern Latvia)

open access: yesMicroorganisms, 2021
Fungi are ecologically important in several ecosystem processes, yet their community composition, ecophysiological roles, and responses to changing environmental factors in historical sediments are rarely studied. Here we explored ancient fungal DNA from
Liisi Talas   +4 more
doaj   +1 more source

Pliocene and Pleistocene chronostratigraphy and paleoenvironment of the Central Arctic Ocean, using deep water agglutinated foraminifera [PDF]

open access: yes, 1998
Deep-water agglutinated foraminifera (DWAF) were studied from Cores PS2177-5, PS2200-5, PS2212-3 and PS2185-6; from the R/V POLARSTERN ARK-VIII/3 Cruise in the central Arctic Ocean.
Evans, J.R., Kaminski, M.A.
core   +1 more source

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