Acantharian Fluxes and Strontium to Chlorinity Ratios in the
Flux data revealed substantial quantities of acantharian skeletons and cysts (both made of strontium sulfate) settling through the upper kilometer of the water column. ... H, ABYSSAL CARBON AND RADIOCARBON IN PACIFIC, JOURNAL OF GEOPHYSICAL RESEARCH 74: 5491 (1969). ... MONITORING MARINE-ENVIRONMENT THROUGH …
Particulate Ba‐barite and acantharians in the Southern Ocean …
[1] Particulate biogenic Ba, Sr and Ca and barite crystal contents from suspended matter were compared with acantharian water column distributions and individual Ba/Sr acantharian skeletal ratios during the European Iron Fertilization Experiment (EIFEX) in the Southern Ocean. In the upper 150 m, results indicate that the …
Sedimentation of acantharian cysts in the Iceland Basin: …
Sedimentation of acantharian cysts in the Iceland Basin: Strontium as a ballast for deep ocean particle flux, and implications for acantharian reproductive strategies Martin, Patrick ... Sanders, Richard; Teagle, Damon A. H. Abstract. Publication: Limnology and Oceanography. Pub Date: 2010 DOI: 10.4319/lo.2010.55.2.0604 Bibcode: …
Deep sedimentation of acantharian cysts
Spore-like reproductive cysts of enigmatic organisms called acantharians rapidly sink from surface waters to the deep ocean in certain regions, according to new research. Scientists suspect that this is part of an extraordinary reproductive strategy, which allows juveniles to exploit a seasonal food bonanza.
(PDF) Acantharia
Reproduction in Acantharia occurs either directly from the adult stage (a-f), or after encystment of the cell (g, h). (a-f) Light microscopy images showing a time lapse of an acantharian cell at ...
Barite and Acantharians
It is this last point, particularly about the Sr concentrations in sea-water, which according to the article Sedimentation of acantharian cysts in the Iceland Basin: Strontium as a ballast for deep ocean particle flux, and implications for acantharian reproductive strategies (Martin et al. 2010) state can fluctuate by several percent
Decelle
Abstract Acantharia are marine planktonic unicellular eukaryotes within the Radiolaria and currently encompass nearly 50 genera and 150 species. They are distributed worldwide from subsurface to de...
Deep sedimentation of acantharian cysts
The research shows that deep sedimentation of cysts during the spring delivers significant amounts of organic matter to the ocean depths, providing a potential source of nutrients for creatures of the deep. ... Evidence suggests that, at high latitudes, rapid, deep sedimentation of acantharian cysts recurs each spring. The cysts sink to …
Limnology and Oceanography
Acantharian cell size ranged widely in the surface waters and near the SCM, whereas the range was more constrained in deeper water ... Sta. 17 (H). Image aspect ratios are unaltered and the scale bar …
Sedimentation of acantharian cysts in the Iceland Basin
Acantharian cysts were discovered in sediment trap samples from spring 2007 at 2000 m in the Iceland Basin. Although these single-celled organisms contribute …
Martin, Patrick, et al. Sedimentation of acantharian cysts …
Patrick Martin, John T. Allen, Matthew J. Cooper, David G. Johns, Richard S. Lampitt, Richard Sanders, Damon A. H. Teagle, Sedimentation of acantharian cysts in the …
Multiple microalgal partners in symbiosis with the acantharian
2.1 Sample collection. Twelve cells of the acantharian species Acanthochiasma sp. were collected in the Mediterranean Sea (Villefranche-sur-Mer; 43°40.552 N, 7°18.447 E) in September 2010 and 2011 by gently towing a plankton net (150 μm mesh size) at the subsurface. Morphological identification was performed …
Sedimentation Rate (Sed Rate) Normal, High, Low, Chart
The erythrocyte sedimentation rate (ESR, or "sed rate") measures how quickly red blood cells fall to the bottom of a test tube. Typically, the higher the sed rate, the more inflammation there is in the body. A sedimentation rate is a common blood test that is used to detect and monitor inflammation in the body.
Abundance, encystment and sedimentation of …
Abundance, encystment and sedimentation of scantharia SrCl2-6H2O to a final concentration of 80 mg I"1 was added to both water column and sediment trap samples, in order to prevent further dissolution of acantharian skeletons and cyst walls, as recommended by Beers and Stewart (1970). Acantharia and their cysts were counted …
Acantharian cysts: high flux occurrence in the bathypelagic …
The abundance and flux of acantharian cysts were recorded for a period of 12 months from December 2012 to 2013 in a sediment trap deployed at 1500 m in the north-eastern Scotia Sea, Southern Ocean. Acantharia (radiolarian protists) are found globally, have very dense celestite skeletons, and form cysts which can sink rapidly …
Deep sedimentation of acantharian cysts -- a | EurekAlert!
Evidence suggests that, at high latitudes, rapid, deep sedimentation of acantharian cysts recurs each spring. The cysts sink to depth to release gametes and then die.
Molecular Phylogeny and Morphological Evolution of the …
Sedimentation of acantharian cysts in the Iceland Basin: Strontium as a ballast for deep ocean particle flux, and implications for acantharian reproductive …
(PDF) Diversity, Ecology and Biogeochemistry of Cyst
Sedimentation of acantharian cysts in the Iceland Basin: Strontium as a ballast. for deep ocean particle flux, and implications for acantharian reproductive. strategies. Limnol Oceanogr 55: 604–614.
Acantharians: a missing link in the oceanic biogeochemistry …
Semantic Scholar extracted view of "Acantharians: a missing link in the oceanic biogeochemistry of barium" by R. E. Bernstein et al.
Deep sedimentation of acantharian cysts
Deep sedimentation of acantharian cysts — a reproductive strategy? Spore-like reproductive cysts of enigmatic organisms called acantharians rapidly sink from surface waters to the deep ocean in certain regions, according to new research. Scientists suspect that this is part of an extraordinary reproductive strategy, which allows juveniles …
Sedimentation of acantharian cyst... preview & related info …
Acantharian cysts were discovered in sediment trap samples from spring 2007 at 2000 m in the Iceland Basin. Although these single-celled organisms c... Journal Article OPEN ACCESS. Sedimentation of acantharian cysts in the Iceland Basin: Strontium as a ballast for deep ocean particle flux, and implications for acantharian reproductive strategies.
Paired high‐throughput, in situ imaging and …
As they are also uncultured, relatively little is known about acantharian biology, especially regarding their life cycles. Here, we take a paired approach, bringing together high-throughput, in situ imaging and metabarcode sequencing, to investigate acantharian abundance, vertical distribution, and life history in the western North Pacific.
Sed rate (erythrocyte sedimentation rate)
Overview. Sed rate, or erythrocyte sedimentation rate (ESR), is a blood test that can show inflammatory activity in the body. Many health problems can cause a sed rate test result to be outside the standard range. A sed rate test is often used with other tests to help your health care team diagnose or check the progress of an inflammatory disease.
Browse Theses
Acantharian cysts can contribute significantly to the pre‐spring bloom POC flux, and dominate the annual particulate Strontium flux in the Iceland Basin, with fluxes up to 2.50 mmol m‐2 yr‐1. The role of celestite, rapid sedimentation and the viability of the Acantharian cysts in the Iceland Basin is explored to further the current ...
Diversity, Ecology and Biogeochemistry of Cyst …
It was hypothesized that deep sedimentation of cysts might be limited to high latitudes and exhibit a seasonal pattern, ... Lampitt RS, et al. (2010) Sedimentation of acantharian cysts in the Iceland Basin: …
Martin, Patrick, et al. Sedimentation of acantharian …
Sedimentation of acantharian cysts in the Iceland Basin: Strontium as a ballast for deep ocean particle flux, and implications for acantharian reproductive strategies Patrick Martin,a,* John T. Allen,a Matthew J. Cooper,a David G. Johns,b Richard S. Lampitt,a Richard Sanders,a and Damon A. H. Teaglea
Sedimentation of acantharian cysts in the Iceland Basin: …
Abstract. Acantharian cysts were discovered in sediment trap samples from spring 2007 at 2000 m in the Iceland Basin. Although these single-celled organisms contribute to particul
Deep sedimentation of acantharian cysts -- a …
Spore-like reproductive cysts of enigmatic organisms called acantharians rapidly sink from surface waters to the deep ocean in certain regions, according to new research. …
Deep sedimentation of acantharian cysts: A reproductive strategy?
Deep sedimentation of acantharian cysts: A reproductive strategy?. ScienceDaily. Retrieved March 31, 2024 from / releases / 2010 / 03 / 100308102200.htm.
Journal of Geophysical Research: Biogeosciences
2.4. Acantharian Abundance and Acantharian-Skeleton Ba/Sr Ratio [14] For quantitative assessment of acantharian abundance, seawater samples were taken from ten or thirteen discrete depths using Niskin bottles. Sampling for acantharians was done at T = −1, at days 10, 21, 28 and 36 (IN-patch) and at days 11, 26 and 34 (OUT …