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- Ulanova, Anna, et al.
(författare)
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Lunella garyae sp nov - A new polyhalobous diatom from the English Channel coast
- 2006
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Ingår i: Diatom Research. - 0269-249X .- 2159-8347. ; 21:2, s. 415-426
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Tidskriftsartikel (refereegranskat)abstract
- A new benthic polyhalobous diatom species, Lunella garyae, is described from supralittoral limestone rock pools at Dancing Ledge, English Channel coast, England. The detailed morphology of this species is examined using scanning electron microscopy (SEM) and light microscopy (LM). The new species is compared with the two previously described Lunella species and with some other morphologically similar diatom taxa. The identity of the genus Lunella is discussed.
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| 2. |
- Öberg, Helena, 1974-, et al.
(författare)
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Morphology, valve ultrastructure and stratigraphical variability of Discostella taxa in a tropical crater lake, northern Tanzania
- 2009
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Ingår i: Diatom Research. - Bristol : Biopress Ltd. - 0269-249X .- 2159-8347. ; 24:2, s. 341-356
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Tidskriftsartikel (refereegranskat)abstract
- Morphological and ultrastructural variability of Discostella Houk et Klee (Bacillariophyceae) valves from a small crater lake in northern Tanzania have been examined under scanning electron microscope (SEM) and light microscope (LM). Three types of Discostella are described; Discostella woltereckii, as well as a small variety of D. woltereckii denoted Discostella woltereckii var. minor Öberg, Risberg et Stabell and an unidentified species, Discostella sp. The diatom record during the last ~100 years is dominated by D. woltereckii and D. woltereckii var. minor. The lithology and diatom stratigraphy of a 36 cm sediment surface core show a period of low lake level with extensive aquatic vegetation from around AD 1600. Sometime around AD 1900 there is a substantial rise in the lake water level indicated by an increase in euplanktonic Aulacoseira ambigua and facultative planktonic Discostella spp.
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