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You searched for: Subject Miozoa Remove constraint Subject: Miozoa Subject term Antarctica Remove constraint Subject term: Antarctica
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1. Annual cycle of phytoplankton, protozoa and diatom species from Scotia Bay (South Orkney Islands, Antarctica): Community structure prior to, during and after an anomalously low sea ice year

Author:
Noelia L. Trifoglio; Héctor F. Olguín Salinas; Claudio A. Franzosi; Viviana A. Alder
Source:
Progress in oceanography 2022 v.204 pp. 102807
ISSN:
0079-6611
Subject:
Agrotis; Bacillariophyceae; Chaetoceros; Ciliophora; El Nino; Eucampia; Miozoa; Protozoa; Thalassiosira; biomass; carbon; climate change; community structure; energy flow; oceanography; phytoplankton; sea ice; wind; Antarctic region; Antarctica
Abstract:
... Deepening the knowledge on Antarctic coastal plankton and its links with environmental conditions is essential to understand the role of these organisms in the carbon and energy flow, and to detect and predict impacts of climate change. This study addresses for the first time the seasonal succession (February 2016 to April 2017) of the phytoplanktonic and protozoan communities of Scotia Bay (Lauri ...
DOI:
10.1016/j.pocean.2022.102807

2. Delineating closely related dinoflagellate lineages using phylotranscriptomics

Author:
Nataliia V. Annenkova; Dag Ahrén; Ramiro Logares; Anke Kremp; Karin Rengefors
Source:
Journal of phycology 2018 v.54 no.4 pp. 571-576
ISSN:
0022-3646
Subject:
Miozoa; amino acid sequences; ancestry; freshwater; genes; habitats; lakes; phylogeny; phytoplankton; protists; salinity; Antarctica; Baltic Sea; Sweden
Abstract:
... Recently radiated dinoflagellates Apocalathium aciculiferum (collected in Lake Erken, Sweden), Apocalathium malmogiense (Baltic Sea) and Apocalathium aff. malmogiense (Highway Lake, Antarctica) represent a lineage with an unresolved phylogeny. We determined their phylogenetic relationships using phylotranscriptomics based on 792 amino acid sequences. Our results showed that A. aciculiferum diverge ...
DOI:
10.1111/jpy.12748

3. Different ecological mechanisms lead to similar grazer controls on the functioning of periphyton Antarctic and sub-Antarctic communities

Author:
Nelson Valdivia; Luis M. Pardo; Erasmo C. Macaya; Pirjo Huovinen; Iván Gómez
Source:
Progress in oceanography 2019 v.174 pp. 7-16
ISSN:
0079-6611
Subject:
Bacillariophyceae; Chlorophyta; Cyanobacteria; Fissurellidae; Miozoa; Phaeophyceae; biocenosis; chlorophyll; ecosystems; grazing; habitats; herbivores; littoral zone; models; periphyton; primary productivity; Antarctic region; Antarctica; Argentina
Abstract:
... The processes underpinning the differences between Antarctic and sub-Antarctic ecological communities are still unclear. Dispersal, drift, speciation, and abiotic environmental filtering have been considered to explain these differences; biotic interactions, however, have received less attention. Antarctic intertidal assemblages of macrobenthic grazers are characterised by numerically abundant pop ...
DOI:
10.1016/j.pocean.2018.01.008

4. Dinoflagellate cyst biostratigraphy and palaeoecology of the early Paleogene Landana reference section, Cabinda Province, Angola

Author:
Thomas Steeman; Julie De Weirdt; Thierry Smith; Thierry De Putter; Florias Mees; Stephen Louwye
Source:
Palynology 2020 v.44 no.2 pp. 280-309
ISSN:
1558-9188
Subject:
Eocene epoch; Miozoa; Oligocene epoch; Selandian age; Thanetian age; biostratigraphy; museums; paleoecology; Angola; Antarctica; Australia; Belgium; Central Africa; Gulf of Guinea; New Zealand
Abstract:
... Forty-four rock samples from the Landana section, belonging to the historical Dartevelle collection of the Royal Museum for Central Africa (RMCA) at Tervuren, Belgium, were palynologically processed and analysed. Systematic analysis of the samples from the Landana sea cliff locality has revealed 90 dinoflagellate cyst taxa spanning an interval that ranges at least from the middle Paleocene to the ...
DOI:
10.1080/01916122.2019.1575091

5. Effects of CO2 concentration on a late summer surface sea ice community

Author:
Andrew McMinn; Marius N. Müller; Andrew Martin; Sarah C. Ugalde; Shihong Lee; Katerina Castrisios; Ken G. Ryan
Source:
Marine biology 2017 v.164 no.4 pp. 87
ISSN:
0025-3162
Subject:
Miozoa; biomass; carbon dioxide; electron transfer; grazing; ice; melting point; microbial communities; nutrients; pH; photosystem II; salinity; summer; temperature; Antarctica
Abstract:
... Annual fast ice at Scott Base (Antarctica) in late summer contained a high biomass surface community of mixed phytoflagellates, dominated by the dinoflagellate, Polarella glacialis. At this time of the year, ice temperatures rise close to melting point and salinities drop to less than 20. At the same time, pH levels can rise above 9 and nutrients can become limiting. In January 2014, the sea ice m ...
DOI:
10.1007/s00227-017-3102-4

6. Light-adaptive state transitions in the Ross Sea haptophyte Phaeocystis antarctica and in dinoflagellate cells hosting kleptoplasts derived from it

Author:
Kostas Stamatakis; Panayiotis-Ilias Broussos; Angeliki Panagiotopoulou; Rebecca J. Gast; Maria Pelecanou; George C. Papageorgiou
Source:
Biochimica et biophysica acta 2019 v.1860 no.1 pp. 102-110
ISSN:
0005-2728
Subject:
Bacillariophyceae; Chlorophyta; Cyanobacteria; Miozoa; Phaeocystis; Rhodophyta; absorption; algae; amino acids; autotrophs; chlorophyll; circular dichroism spectroscopy; fluorescence; kleptoplasts; photosynthesis; ultraviolet radiation; Antarctica
Abstract:
... Light state transitions (STs) is a reversible physiological process that oxygenic photosynthetic organisms use in order to minimize imbalances in the electronic excitation delivery to the reaction centers of Photosystems I and II, and thus to optimize photosynthesis. STs have been studied extensively in plants, green algae, red algae and cyanobacteria, but sparsely in algae with secondary red alga ...
DOI:
10.1016/j.bbabio.2018.11.016

7. Occurrence, distribution, and sea-air fluxes of volatile halocarbons in the upper ocean off the northern Antarctic Peninsula in summer

Author:
Cheng-Xuan Li; Kan Chen; Xia Sun; Bao-Dong Wang; Gui-Peng Yang; Yan Li; Lu Liu
Source:
Science of the total environment 2021 v.758 pp. 143947
ISSN:
0048-9697
Subject:
Miozoa; carbon tetrachloride; chloroform; chlorophyll; environment; glaciers; methyl iodide; ozone depletion; pollutants; saline water; salinity; sea ice; summer; tetrachloroethylene; winter; Antarctic region; Antarctica
Abstract:
... We studied the spatial variations of six volatile halocarbons (VHCs), namely, iodomethane (CH₃I), chloroform (CHCl₃), tetrachloroethylene (C₂Cl₄), bromodichloromethane (CHBrCl₂), dibromomethane (CH₂Br₂), and carbon tetrachloride (CCl₄), and the environmental influencing factors involved in the cycling of VHCs in the upper ocean (0–500 m) off the Northern Antarctic Peninsula (NAP) during the summer ...
DOI:
10.1016/j.scitotenv.2020.143947

8. Palynology of the NBP03–01A transect in the Northern Basin, Western Ross Sea, Antarctica: A late Pliocene record

Author:
Sophie Warny; John H. Wrenn; Philip J. Bart; Rosemary Askin
Source:
Palynology 2006 v.30 no.1 pp. 151-182
ISSN:
1558-9188
Subject:
Bacillariophyceae; Eocene epoch; Miozoa; Oligocene epoch; Pliocene epoch; Podocarpaceae; Proteaceae; algae; basins; flora; geophysics; ice; palynology; pollen; rain forests; sediments; spores; streams; tundra; woodlands; Antarctica; Arctic region
Abstract:
... Fifty‐seven samples taken from ten piston cores collected along a transect off the continental margin of the Northern Basin, Ross Sea, Antarctica were analyzed for palynomorphs. Moderately diverse assemblages of marine microplankton and terrestrial palynomorphs were recovered. The palynomorph assemblages have been subdivided into two main groups: the in‐situ flora (including acritarchs, dinoflagel ...
DOI:
10.1080/01916122.2006.9989624

9. Reorganization of Southern Ocean Plankton Ecosystem at the Onset of Antarctic Glaciation

Author:
Alexander J. P. Houben; Peter K. Bijl; Jörg Pross; Steven M. Bohaty; Sandra Passchier; Catherine E. Stickley; Ursula Röhl; Saiko Sugisaki; Lisa Tauxe; Tina van de Flierdt; Matthew Olney; Francesca Sangiorgi; Appy Sluijs; Carlota Escutia; Henk Brinkhuis
Source:
Science 2013 v.340 no.6130 pp. 341-344
ISSN:
0036-8075
Subject:
Miozoa; ecosystems; fossils; glaciation; ice; plankton; sediments; Antarctic region; Antarctica
Abstract:
... Southern Change Antarctica has been mostly covered by ice since the inception of large-scale continental glaciation during the Oligocene, which profoundly altered the isotopic and mineralogical records of the sediments surrounding the continent. Houben et al. (p. 341) found records of the corresponding living systems in the fossil marine dinoflagellate cysts, which revealed that a microplankton ec ...
DOI:
10.1126/science.1223646

10. Revised chronostratigraphy of DSDP Site 270 and late Oligocene to early Miocene paleoecology of the Ross Sea sector of Antarctica

Author:
Denise K. Kulhanek; Richard H. Levy; Christopher D. Clowes; Joseph G. Prebble; Daniel Rodelli; Luigi Jovane; Hugh E.G. Morgans; Christoph Kraus; Horst Zwingmann; Elizabeth M. Griffith; Howie D. Scher; Robert M. McKay; Timothy R. Naish
Source:
Global and planetary change 2019 v.178 pp. 46-64
ISSN:
0921-8181
Subject:
Bacillariophyceae; Miocene epoch; Miozoa; Nothofagaceae; Oligocene epoch; Pliocene epoch; Podocarpaceae; Proteaceae; Retaria; basins; biostratigraphy; climatic factors; drilling; ice; landscapes; magnetism; microfossils; models; mudstone; paleoecology; plankton; pollen; sandstone; sediments; shrublands; silty clay soils; subsidence; tundra; Antarctica
Abstract:
... Deep Sea Drilling Project (DSDP) Site 270, located in the central high of the Ross Sea, was cored to 422.5 m below seafloor (mbsf) and recovered a thick Oligocene to lower Miocene sequence of mudstone with varying amounts of ice rafted debris (IRD), overlain by ~20 m of Pliocene to Recent diatom silty clay with IRD. This site provides important temporal constraints on regional stratigraphy and ins ...
DOI:
10.1016/j.gloplacha.2019.04.002

11. Species of the acritarch genus palaeostomocystis deflandre 1937: Potential indicators of neritic subpolar to polar environments in Antarctica during the Cenozoic

Author:
Sophie Warny
Source:
Palynology 2009 v.33 no.2 pp. 43-54
ISSN:
1558-9188
Subject:
Miozoa; Pleistocene epoch; coasts; islands; palynology; pollen; sediments; spores; Antarctic region; Antarctica; Arctic region; Bering Sea; Greenland
Abstract:
... A palynological analysis was undertaken on 16 samples from seven piston cores collected along two offshore transects near Seymour and James Ross Islands. Diverse assemblages of reworked marine microplankton (including organic‐walled dinoflagellate cysts, cymatiosphaerids, leiospheres, and other acritarchs) and terrestrial palynomorphs (including pollen and spores) were recovered from glacio‐marine ...
DOI:
10.1080/01916122.2009.9989682

12. Taxonomic investigations of palynomorphs from the Byers group (Upper Jurassic‐Lower Cretaceous), Livingston and Snow islands, Antarctic Peninsula

Author:
Ailbhe M. Duane
Source:
Palynology 1997 v.21 no.1 pp. 123-144
ISSN:
1558-9188
Subject:
Cretaceous period; Miozoa; islands; milling; new species; paleoceanography; palynology; Antarctic region; Antarctica
Abstract:
... Two new palynomorph taxa are described, and several existing taxa are discussed from the Upper Jurassic‐Lower Cretaceous Byers Group of Livingston and Snow islands, South Shetland Islands, Antarctic Peninsula. Oligosphaeridium byersense sp. nov., a dinoflagellate cyst species, is found in the Valanginian interval of the Byers Group. Globorotundata acrita gen. et sp. nov., apalynomorph of unknown a ...
DOI:
10.1080/01916122.1997.9989491

13. Terrestrial and marine floral response to latest Eocene and Oligocene events on the Antarctic Peninsula

Author:
Sophie Warny; C. Madison Kymes; Rosemary Askin; Krzysztof P. Krajewski; Andrzej Tatur
Source:
Palynology 2019 v.43 no.1 pp. 4-21
ISSN:
1558-9188
Subject:
Eocene epoch; Fagus; Miozoa; Nothofagus; Oligocene epoch; basins; climate; conifers; flora; forests; glaciation; palynology; phytoplankton; vegetation cover; volcanic activity; Antarctic region; Antarctica; Argentina; Chile
Abstract:
... Palynological results from opposite sides of the northernmost Antarctic Peninsula provide insight on terrestrial vegetation and sea-surface conditions immediately before the Eocene–Oligocene transition (EOT), through Early Oligocene glacial conditions and the subsequent Late Oligocene interglacial interval. A latest Eocene sample set from the uppermost La Meseta Formation on Seymour Island, James ...
DOI:
10.1080/01916122.2017.1418444

14. An effective palynological preparation procedure using hydrogen peroxide

Author:
James B. Riding; Jane E. Kyffin‐Hughes
Source:
Palynology 2007 v.31 no.1 pp. 19-36
ISSN:
1558-9188
Subject:
Danian age; Middle Jurassic epoch; Miozoa; Mississippian period; Pleistocene epoch; clay; clay fraction; cold; human resources; hydrochloric acid; hydrofluoric acid; hydrogen peroxide; mudstone; oxidants; oxidation; palynology; processing technology; sediments; Antarctica; England; Scotland; United States
Abstract:
... Most pre‐Quaternary palynology samples are currently prepared by demineralization of the sediment/sedimentary rock matrix using hydrochloric and hydrofluoric acids (HCl and HF respectively). If a consistently effective alternative to this procedure can be developed, palynological processing will be made significantly less hazardous to both laboratory personnel, and to the wider environment. Furthe ...
DOI:
10.1080/01916122.2007.9989632

15. A high-resolution record of environmental changes from a Cretaceous-Paleogene section of Seymour Island, Antarctica

Author:
Roberto A. Scasso; Mercedes B. Prámparo; Johan Vellekoop; Corina Franzosi; Liliana N. Castro; Jaap S. Sinninghe Damsté
Source:
Palaeogeography, palaeoclimatology, palaeoecology 2020 v.555 pp. 109844
ISSN:
0031-0182
Subject:
Angiospermae; Cretaceous period; Miozoa; Paleocene epoch; air; biostratigraphy; estuaries; latitude; organic matter; palaeogeography; paleoclimatology; paleoecology; palynology; pollen; sandstone; sea level; submergence; water; Antarctic region; Antarctica
Abstract:
... A high-resolution sedimentological and palynological study was performed in combination with biomarker-based organic geochemical temperature proxies TEX₈₆ and MBT′/CBT, on a 7.4-m-thick continuous section straddling the Cretaceous-Paleogene (K-Pg) boundary at Seymour Island, at the northern tip of the Antarctic Peninsula. The K-Pg interval of the Seymour Island section was deposited in a deltaic/e ...
DOI:
10.1016/j.palaeo.2020.109844

16. A new genus and two new species of dinoflagellate cysts from lower Eocene marine sediments of the Wilkes Land Margin, Antarctica

Author:
Peter K. Bijl; Henk Brinkhuis
Source:
Review of palaeobotany and palynology 2015 v.220 pp. 88-97
ISSN:
0034-6667
Subject:
Eocene epoch; Miozoa; drilling; geometry; marine sediments; new genus; new species; Antarctica
Abstract:
... Integrated Ocean Drilling Program (IODP) Expedition 318 recovered lower Eocene sediments in Hole U1356A from the continental rise of the Wilkes Land Margin, Antarctica. These sediments yielded a new genus of organic-walled dinoflagellate cysts (Adeliesphaera gen. nov.). We tentatively place this new genus within the suborder Gonyaulacineae, family Areoligeraceae, based on the obligate apical arche ...
DOI:
10.1016/j.revpalbo.2015.05.004