Showing papers in "Marine Micropaleontology in 1995"

TL;DR: In this paper, the authors present a conceptual model which explains benthic foraminiferal microhabitat preferences in terms of differences in the downward organic flux in the sediment.

TL;DR: In this paper, the distribution patterns of live planktic foraminifers are examined at two times of the year, late summer and late winter, through horizontal plankton towing along a NW-SE transect across the West and East Mediterranean Basins and in the Alboran Sea (French oceanographic cruises Vicomed I, II and III, respectively).

TL;DR: It took more than one year after reaeration before the areas, where anoxic conditions had prevailed for more than five years, became suitable for colonization and Stainforthia fusiformis was the first and most successful species to recolonize the formerly anoxic areas and it showed exceptionally high densities in samples collected a few meters above the redox-boundary.

TL;DR: A seven month-long time series sediment trap project was carried out in San Pedro Basin (Southern California Borderlands) in order to evaluate the response of calcareous nannoplankton to seasonal hydrographic changes.

TL;DR: In this article, Dinoflagellate cysts and other organic-walled microfossils have been studied in recent surface sediments from the entire Norwegian-Greenland Sea.

TL;DR: Foraminifera of St. Catherines Island, Georgia are found to be epibenthic to deep infaunal (to 30 cm) microhabitats.

TL;DR: In this paper, the late glacial to Holocene paleoclimatic and paleoceanographic changes are examined using records of calcareous and organic-walled marine microfossils, pollen and terrestrial spores and oxygen isotope data in cores from the Aegean Sea basins.

TL;DR: Foraminiferal assemblages are well known to vary in accordance with seasonal fluctuations in ocean properties, periodic reproduction cycles, and variations between water masses as discussed by the authors, and it has been shown that storms also can significantly influence foraminiferal assemblage.

TL;DR: In this article, it is shown that BFAR and B P do not record the surface-water productivity signal in the intense upwelling and oxygen minimum zone (OMZ) along the Oman Margin.

TL;DR: Bathyal benthic foraminifera and stable isotopes from the Caravaca and Zumaya sections of Spain, indicate that the mass extinction near the Paleocene/Eocene (P/E) boundary (upper planktic foraminiferal Zone P6a) was rapid, coinciding with a negative δ13C-shift of 2-4%., the onset of dark grey shale deposition and increased carbonate dissolution.

TL;DR: Observations raise questions regarding the taxonomy and phylogeny of unilocular agglutinated foraminifera and other primitive granuloreticuloseans and the ecology of this important taxon.

TL;DR: In this paper, living and dead foraminiferal assemblages from surface sediments in the northwestern part of the Skagerrak have been studied in order to define and characterize the distribution of various modern benthic environments and by comparing these findings with surface samples collected 40-60 years ago, to document possible faunal changes that might have occurred.

TL;DR: Two new methods enabling exact point estimation of the gradients are developed, based on logit-transformed density functions, which allows additional diagnosis of the coenoclines under investigation.

TL;DR: The euryhaline foraminifer Ammonia beccarii tepida has lived in water bodies of the Dead Sea rift from at least 2.0 Ma to the present day.

TL;DR: Foraminiferal reproduction and preservation have been studied in Holocene tidal flat sediments of Bahia la Choya, Sonora, Mexico (northern Gulf of California).

TL;DR: DNA analysis and morphologic comparisons allow the distinction of three species: A. tepida A. beccarii and A. parkinsoniana, which resemble each other more than sequences of different morphotypes from the same locality.

TL;DR: Cytological examination of mottled and bleached specimens revealed membrane disintegration, symbiont digestion, lysosomes adjacent to symbionts, enlarged vacuoles in the cy toplasm, few mitochondria or other organelles, and granulation of the cytoplasm in early stages of the disease.

TL;DR: The sequence heterogeneity demonstrates a high degree of genetic diversity among Symbiodinium -like zooxanthellae and re-emphasizes that they are a variety of distinct entities, which implies that flexible recombinations among hosts and symbionts are evolutionarily favorable over permanently associated lineages, at least in these benthic foraminifera.

TL;DR: In this article, eleven planktic foraminiferal zones are established in the Maastrichtian-lower Eocene sediments at the North Gunna section (Farafra Oasis, Western Desert, Egypt).

TL;DR: In this article, a sequence biostratigraphy approach was used to define eight seismic stratigraphic sequences on the tectonically active, glaciated continental margin of the upper Cenozoic Gulf of Alaska.

TL;DR: In this paper, foraminifera from 24 DSDP/ODP sites were investigated to assess their global horizontal and vertical distribution in the deep-sea environment at the end of the Cretaceous period.

TL;DR: Most species of the natural community colonized the defaunated sediment, although population sizes were 50 times smaller than natural populations, and stained foraminifera were only found in the 5–10 mm thick fluffy layer that had been newly deposited upon the artificial sediment.

TL;DR: Foraminifers became abundant and evolved rapidly from the later part of the Devonian through the Permian, and the evolution of taxa formed the basis of a detailed zonation through the Carboniferous and Permians as mentioned in this paper.

TL;DR: A number of endosymbiotic species, common in Indo-Pacific hosts, were not found in the Caribbean hosts studied and the results of the present study are in consonance with those of previous studies.

TL;DR: The area of active venting (AAV) in Middle Valley at a depth of 2430 m at the northern end of Juan de Fuca Ridge, northeast Pacific Ocean, yielded 156 identifiable taxa.

TL;DR: In this article, a comparison between Soutar core faunal data and gravity core-top data from about 500 m to 4000 m in the Sulu Sea is made.

TL;DR: Tres Esquinas, the upper member of the La Luna Formation, a 1-3 m thick condensed sequence composed of glauconitic phosphorite, signals the commencement of the Late Cretaceous regression in western Venezuela as discussed by the authors.

TL;DR: In this paper, a unique faunal composition with a predominance of agglutinated taxa, many of them previously unrecorded from any other DSDP and ODP Indian Ocean sites, are documented and five new species are described.

TL;DR: In this article, an AMS 14C-dated high resolution sediment core from the Norwegian Seas (water depth: 2707 m) provides a record of the faunal fluctuations from the last glacial maximum across the Weichselian deglaciation to the Holocene.

TL;DR: In this paper, the authors studied the upper Pliocene and Pleistocene abundance fluctuations of the radiolarian Cycladophora davisiana (Petrushevskaya) and provided the first long-term correlation of its abundance fluctuations to oxygen isotope stages 1-114.