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Morphology, valve u...
Morphology, valve ultrastructure and stratigraphical variability of Discostella taxa in a tropical crater lake, northern Tanzania
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- Öberg, Helena, 1974- (författare)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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- Risberg, Jan (författare)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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- Stabell, Bjørg (författare)
- Department of Geosciences, University of Oslo
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(creator_code:org_t)
- Bristol : Biopress Ltd, 2009
- 2009
- Engelska.
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Ingår i: Diatom Research. - Bristol : Biopress Ltd. - 0269-249X .- 2159-8347. ; 24:2, s. 341-356
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Naturgeografi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Physical Geography (hsv//eng)
Nyckelord
- Discostella
- Valve ultrastructure
- Tanzania
- Lake Duluti
- paleolimnology
- Plant Morphology
- växtmorfologi
- geografi med naturgeografisk inriktning
- Physical Geography
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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