Toxicities of Irgarol 1051 derivatives, M2 and M3, to two marine diatom species

2019 ◽  
Vol 182 ◽  
pp. 109455 ◽  
Author(s):  
Amy Q. Zhang ◽  
Guang-Jie Zhou ◽  
Michael H.W. Lam ◽  
Kenneth M.Y. Leung
Keyword(s):  
Marine Diatom ◽  
Diatom Species ◽  
Irgarol 1051

New species of benthic marine diatoms (Bacillariophyta) from the Western Pacific islands of Guam and Yap

Phytotaxa ◽  
2021 ◽  
Vol 508 (3) ◽  
Author(s):  
CHRISTOPHER S. LOBBAN
Keyword(s):  
Pacific Islands ◽  
Central Area ◽  
Marshall Islands ◽  
Marine Diatom ◽  
Large Species ◽  
Diatom Species ◽  
Cell Interior ◽  
Pennate Diatom ◽  
The Western Pacific ◽  
Benthic Marine Diatoms

In the course of preparation of a major checklist for Yap and ongoing investigations into the benthic marine diatom flora of Micronesia, thirteen new araphid and raphid pennate diatom species have been recognized and are described here. Plagiogramma subatomus is even smaller than P. atomus and the pseudoseptum forms a box with only a small opening toward the cell interior. Licmophora romuli is similar in size and spathulate shape to L. remulus, but the majority of the striae in the lamina lack vimines. L. graphis is exceedingly delicate, pencil-shaped, with apical striae 60–70 in 10 µm. Divergita biformis and D. decipiens are straight species with striae biseriate on the margin, uniseriate on the valve face, differing in the shape and prominence of the sternum and the shape of the valve-face areolae. D. macinnisii (from Marshall Islands, but included here for comparison) is curved, again with the decussate areolar pattern on the mantle, but with single extended areolae along each side of the linear sternum. These characters slightly amend the diagnosis of the genus.  Thalassionema baculum is a very short member of the genus, linear and isopolar. Climaconeis tarangensis is curved and differs from C. riddleae in stria density and areola shape; C. minaegensis is straight, without a stauros or craticular bars, of intermediate length, 228–247 µm. First SEM observations of Climaconeis lorenzii are presented and an updated key to Climaconeis is appended. Parlibellus paschalis is a tube-dwelling species differing from P. delognei is lacking cuniculi and pores in the central area. P. waabensis is a relatively large species, possibly tube-dwelling, that differs from P. delognei in shape and spacing of central striae and from P. berkeleyi in width and stria density. Pleurosigma simulacrum differs in ultrastructural details from P. intermedium. Lastly, Nitzschia tarangensis is a conopeate species, spathulate in profile with ribs along the edge of the valve depression and bordering the raphe, and with pores in the peri-raphe zone.

Interaction between zinc and freshwater and marine diatom species: Surface complexation and Zn isotope fractionation

2006 ◽  
Vol 70 (4) ◽  
pp. 839-857 ◽  
Author(s):  
A. Gélabert ◽  
O.S. Pokrovsky ◽  
J. Viers ◽  
J. Schott ◽  
A. Boudou ◽  
...  
Keyword(s):  
Isotope Fractionation ◽  
Surface Complexation ◽  
Marine Diatom ◽  
Diatom Species

scholarly journals Arsenic biotransformation potential of six marine diatom species: effect of temperature and salinity

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Rimana Islam Papry ◽  
Kento Ishii ◽  
M. Abdullah Al Mamun ◽  
Sohag Miah ◽  
Kanako Naito ◽  
...  
Keyword(s):  
Marine Diatom ◽  
Effect Of Temperature ◽  
Diatom Species ◽  
Species Effect

Phytolith and diatom evidence for rice exploitation and environmental changes during the early mid-Holocene in the Yangtze Delta

2016 ◽  
Vol 86 (3) ◽  
pp. 304-315 ◽  
Author(s):  
Xinxin Zuo ◽  
Houyuan Lu ◽  
Zhen Li ◽  
Bing Song ◽  
Deke Xu ◽  
...  
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Environmental Changes ◽  
Climatic Changes ◽  
Climatic Conditions ◽  
Marine Diatom ◽  
Diatom Species ◽  
Yangtze Delta ◽  
Apparent Correlation ◽  
The Ideal

AbstractUsing phytolith analysis from a well-dated and high-resolution sediment sequence in the apex of northern Yangtze Delta, we investigate environmental changes, the rise and decline of rice exploitation and possible impacts of environment on rice exploitation during the early mid-Holocene. The phytolith sequence documents a relatively warm and dry interval during ca.9000 to 8200 cal yr BP, followed by climatic amelioration before 7200 cal yr BP. Phytolith evidence indicates that rice exploitation at the apex of northern Yangtze Delta began at 8200 cal yr BP, flourished by 7700 cal yr BP and ceased after 7400 cal yr BP. The first emergence of marine diatom species approximately 7300 cal yr BP likely indicates an accelerated sea-level rise. The apparent correlation of the initiation of rice exploitation with climatic amelioration during the early mid-Holocene suggests that climatic changes may have played an important role in facilitating rice exploitation. Both the ideal climatic conditions and stable sea level enabled flourishing rice exploitation during 8200 to 7400 cal yr BP. Although the climate remained warm and wet after 7400 cal yr BP, local sea-level rise possibly led to the termination of earlier rice exploitation at this site of the northern Yangtze Delta.

Marine diatom species harbour distinct bacterial communities

2005 ◽  
Vol 7 (6) ◽  
pp. 860-873 ◽  
Author(s):  
Hans-Peter Grossart ◽  
Florian Levold ◽  
Martin Allgaier ◽  
Meinhard Simon ◽  
Thorsten Brinkhoff
Keyword(s):  
Bacterial Communities ◽  
Marine Diatom ◽  
Diatom Species

Humidophila komarekiana sp. nov. (Bacillariophyta), a new limnoterrestrial diatom species from King George Island (Maritime Antarctica)

Phytotaxa ◽  
2016 ◽  
Vol 272 (3) ◽  
pp. 184 ◽  
Author(s):  
NATALIA KOCHMAN-KĘDZIORA ◽  
TERESA NOGA ◽  
RALITSA ZIDAROVA ◽  
KATEŘINA KOPALOVÁ ◽  
BART VAN DE VIJVER
Keyword(s):  
New Species ◽  
Marine Diatom ◽  
South Shetland Islands ◽  
Diatom Species ◽  
King George Island ◽  
Maritime Antarctica ◽  
Antarctic Region ◽  
Diatom Flora ◽  
Shetland Islands ◽  
The Antarctic

During a survey of the non-marine diatom flora of King George Island (South Shetland Islands), an unknown Humidophila taxon was recorded. Detailed light and scanning electron microscopy observations indicated that the unknown taxon could not be identified based on the currently available literature. The new species is described as Humidophila komarekiana sp. nov. and is characterized in having strictly linear valves with parallel margins and broadly rounded, never protracted apices, a filiform raphe with almost indistinct, straight proximal and distal raphe endings. The striae are composed of one, irregularly shortened areola. The mantle areolae are interrupted at the apices. The new species is compared with similar taxa in the Antarctic Region and worldwide. Notes on the ecology of the new species are added.

Light manipulation in a marine diatom

2008 ◽  
Vol 23 (12) ◽  
pp. 3229-3235 ◽  
Author(s):  
Joseph Noyes ◽  
Manfred Sumper ◽  
Pete Vukusic
Keyword(s):  
Experimental Investigation ◽  
Cell Walls ◽  
Marine Diatom ◽  
Centric Diatom ◽  
Diatom Cell ◽  
Diatom Species ◽  
Light Manipulation ◽  
Insight Into ◽  
Periodic Nanostructure

Diatoms are well known for the intricately patterned nanostructure of their silica-based cell walls. To date, the optical properties of diatom cell-wall ultrastructures have largely gone uncharacterized experimentally. Here we report the results of a detailed experimental investigation of the way in which light interacts with the ultrastructure of a representative centric diatom species,Coscinodiscus wailesii. Light interaction both with individual valves and whole bivalves of the diatomC. wailesiiwas measured. Significant sixfold symmetric diffraction through the valve ultrastructure was observed in transmission and quantified to efficiencies that were found to be strongly wavelength dependent; approximately 80% for red, 30% for green, and 20% for blue light. While these results may potentially offer insight into the role of periodic nanostructure in diatom selection, they are also important for consideration in the design of biomimetic optics-based diatom applications.

Sign in / Sign up

Export Citation Format

Share Document