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New species of Uroglena and Ochromonas (Chromulinales, Chrysophyceae) from Estonia

Cronberg, Gertrud LU and Laugaste, R (2005) In Nova Hedwigia: Zeitschrift für Kryptogamenkunde Suppl. 128. p.43-63
Abstract
During the spring of 2003 ninety-five water bodies in southeastern Estonia were surveyed for chrysophytes. The sampling was carried out as the ice broke up, when, within two weeks, the water temperature rose from 3 degrees C to 13 degrees C. Large lakes to small pools of different water chemistry were investigated. The plankton collected was studied alive within a few hours after sampling. Preparations for scanning electron microscopy (SEM) were made from fresh samples and later also from material preserved in Lugol's solution.

About 95% of the water bodies contained chrysophytes. Species belonging to the genera Chrysosphaerella, Dinobryon, Mallonionas, Synura, Ochromonas, Paraphysomonas, Spiniferomonas, Uroglena and Uroglenopsis... (More)
During the spring of 2003 ninety-five water bodies in southeastern Estonia were surveyed for chrysophytes. The sampling was carried out as the ice broke up, when, within two weeks, the water temperature rose from 3 degrees C to 13 degrees C. Large lakes to small pools of different water chemistry were investigated. The plankton collected was studied alive within a few hours after sampling. Preparations for scanning electron microscopy (SEM) were made from fresh samples and later also from material preserved in Lugol's solution.

About 95% of the water bodies contained chrysophytes. Species belonging to the genera Chrysosphaerella, Dinobryon, Mallonionas, Synura, Ochromonas, Paraphysomonas, Spiniferomonas, Uroglena and Uroglenopsis were recorded.



The genus Uroglena was frequent and recorded in 30% of the localities studied. Mass development of different Uroglena species was found in several waterbodies. Many populations had developed stomatocysts (statospores, cysts) of different morphology, and, using LM, smooth stomatocysts and stomatocysts with long spines could be recognised. However, using SEM, it was shown that also the smooth stomatocysts had short spines. Four new species of Uroglena were found and are described here. Uroglena estonica and U. spinosa had long spines while U. kukkii and U. pikamae had very short spines. In addition, mass development of stomatocysts of an Ochromonas was recorded in two lakes. This species had similarities with Ochromonas stellaris, but differed in stomatocyst ornamentation, and is also described as a new species, O. magnifica. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nova Hedwigia: Zeitschrift für Kryptogamenkunde
volume
Suppl. 128
pages
43 - 63
publisher
J. Cramer in der Gebrüder Borntraeger Verlagsbuchhandlung
external identifiers
  • wos:000235193900004
ISSN
0029-5035
language
English
LU publication?
yes
id
b21ab50f-f343-4524-bf07-95d859b7fdb3 (old id 155309)
date added to LUP
2007-06-28 12:55:53
date last changed
2016-04-16 04:27:17
@article{b21ab50f-f343-4524-bf07-95d859b7fdb3,
  abstract     = {During the spring of 2003 ninety-five water bodies in southeastern Estonia were surveyed for chrysophytes. The sampling was carried out as the ice broke up, when, within two weeks, the water temperature rose from 3 degrees C to 13 degrees C. Large lakes to small pools of different water chemistry were investigated. The plankton collected was studied alive within a few hours after sampling. Preparations for scanning electron microscopy (SEM) were made from fresh samples and later also from material preserved in Lugol's solution. <br/><br>
About 95% of the water bodies contained chrysophytes. Species belonging to the genera Chrysosphaerella, Dinobryon, Mallonionas, Synura, Ochromonas, Paraphysomonas, Spiniferomonas, Uroglena and Uroglenopsis were recorded.<br/><br>
<br/><br>
The genus Uroglena was frequent and recorded in 30% of the localities studied. Mass development of different Uroglena species was found in several waterbodies. Many populations had developed stomatocysts (statospores, cysts) of different morphology, and, using LM, smooth stomatocysts and stomatocysts with long spines could be recognised. However, using SEM, it was shown that also the smooth stomatocysts had short spines. Four new species of Uroglena were found and are described here. Uroglena estonica and U. spinosa had long spines while U. kukkii and U. pikamae had very short spines. In addition, mass development of stomatocysts of an Ochromonas was recorded in two lakes. This species had similarities with Ochromonas stellaris, but differed in stomatocyst ornamentation, and is also described as a new species, O. magnifica.},
  author       = {Cronberg, Gertrud and Laugaste, R},
  issn         = {0029-5035},
  language     = {eng},
  pages        = {43--63},
  publisher    = {J. Cramer in der Gebrüder Borntraeger Verlagsbuchhandlung},
  series       = {Nova Hedwigia: Zeitschrift für Kryptogamenkunde},
  title        = {New species of Uroglena and Ochromonas (Chromulinales, Chrysophyceae) from Estonia},
  volume       = {Suppl. 128},
  year         = {2005},
}