Results 131 to 140 of about 2,096 (176)

The Achnanthidium minutissimum complex (Bacillariophyceae) in southern Poland

Algological Studies, 2011
Representatives of the Achnanthidium minutissimum (Kutz.) Czarn. complex are common and widespread diatoms in Poland. The following species were included in this study: Achnanthidium affine (Grunow) Czarn., A. caledonicum (LanGe-Bert.) LanGeBert., A. eutrophilum (LanGe-Bert.) LanGe-Bert., A. exile (Kutz.) HeiB., A. jackii raBenH., A. lineare w.
Wojtal, A.Z., Ector, L., Van de Vijver, B., Morales, E.A., Blanco, S., Piatek, J., Smieja, A.   +6 more
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The genus Stauroneis (Bacillariophyceae) in the Antarctic region

Journal of Biogeography, 2005
AbstractAim  To provide a detailed biogeography of the diatom genus Stauroneis in the Antarctic and sub‐Antarctic regions and to establish the biogeographical relationships between the different constituent locations to test the application of a precise and refined taxonomy in generating accurate polar biogeographies.Location  The Antarctic and sub ...
Van de Vijver, Bart, Gremmen, Niek J.M., Beyens, Louis   +2 more
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Pedogamy in Neidium (Bacillariophyceae)

Folia Microbiologica, 2008
Single (unpaired) vegetative cells of freshwater pennate diatom Neidium cf. ampliatum differentiated into gametangia and produced a single zygote (auxospore) via a pedogamic process. The gametic nuclei fused after auxospore expansion had begun. The auxospore expanded in parallel to the apical axis of the gametangium.
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A comparative study of Reimeria species (Bacillariophyceae)

Nova Hedwigia, 2010
Abstract: A study of five Reimeria taxa was performed based on light microscopy (LM) and scanning electron microscopy (SEM). The new species Reimeria fontinalis Levkov sp. nov. from Lake Ohrid (Macedonia) was compared to similar taxa, R. sinuata (W.Gregory) Kociolek & Stoermer and R. ovata (Hustedt) Levkov & Ector stat. nov.
Zlatko Levkov, Luc Ector
openaire   +1 more source

Toxic effect of nickel on microalgae Phaeodactylum tricornutum (Bacillariophyceae)

Ecotoxicology, 2022
Nickel acts as an essential trace nutrient or toxicant for organisms, depending on its concentration. The increased concentrations of nickel, due to anthropogenic activity, in the aquatic environment are potential threats to aquatic organisms. However, the knowledge on toxic mechanisms of nickel to microalgae remains incompletely understood.
Ruoyu, Guo, Douding, Lu, Chenggang, Liu, Jiarong, Hu, Pengbin, Wang, Xinfeng, Dai   +5 more
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Pseudostephanodiscus gen. n. (Bacillariophyceae)

Archiv für Protistenkunde, 1988
Summary The new genus differs from the genus Stephanodiscus in having in the external layer of the valve irregularly disposed rough chinks instead of radially arranged files of areoles, and a narrow dentate frill on the abvalvar mantle edge of the valve. The only species Pseudostephanodiscus perforatus ( Genk. et Kuzm. ) Siem.
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?? ?????????? Bacillariophyceae ?????????????????? ???????????????? ???????? ?????????????????? ???????? (????????????)

2014
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Cladistic analysis of plicated Thalassiosira (Bacillariophyceae)

Phycologia, 2001
Abstract Nineteen Thalassiosira species informally referred to as the plicated Thalassiosira were examined in a cladistic analysis. The species range in age from 17 Ma to modern, representing the earliest known members of the group and its most recent members.
Matthew L. Julius, Yoshihiro Tanimura
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Observations on Navicula okunoi Hustedt (Bacillariophyceae

Phycologia, 1988
Abstract Navicula okunoi Hustedt was described from a Miocene freshwater deposit near Setana, Japan. The holotype and so far only known specimen of this taxon has been destroyed. Recent thorough research revealed several specimens among which a neotype was designated. This investigation also showed that the taxon belongs in the genus Achnanthes.
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Metapopulation Structure in the Planktonic Diatom Ditylum brightwellii (Bacillariophyceae)

Protist, 2009
Approximately 200,000 diatom species are thought to exist and yet the underlying processes of speciation in diatoms are unknown. Because genetic subdivision within species can reveal potential speciation mechanisms, we examined genetic differentiation and patterns of gene flow among four populations of the diatom Ditylum brightwellii.
Rynearson, Tatiana A., Lin, Ellen O., Armbrust, E. Virginia   +2 more
openaire   +3 more sources