By Katharine E. Duff, Barbara A. Zeeb, John P. Smol (auth.)
Chrysophycean algae are a various and sometimes considerable crew of essentially freshwater phytoplankton, characterised via the endogenous formation of siliceous cysts or stomatocysts (also known as statospores or statocysts). Cyst morphology is very variable, yet believed to be species-specific.
lately, cysts have bought huge consciousness from phycologists and particularly paleoecologists who desire to use those symptoms for checks of environmental switch. still, makes an attempt at utilizing cysts have frequently been hampered through taxonomic difficulties.
This Atlas dispels many of the secret surrounding stomatocysts, facilitating the actual id of person cyst morphotypes, and inspiring different staff to start utilizing those vital symptoms. The terminology used to explain cysts is printed intimately, via specific descriptions of cyst morphotypes, following foreign Statospore operating workforce (ISWG) instructions, complemented by means of scanning electron and lightweight micrographs, in addition to line illustrations. Any on hand biogeographical and ecological details can be supplied. those descriptions will extra speed up the continuing attempt to hyperlink cyst morphotypes to the algae that produce them.
For paleoecologists who desire to contain stomatocysts of their reviews, researchers operating with dwelling chrysophycean algae, and people drawn to the morphology and ultrastructure of cyst morphotypes.
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A. 5 cm. LM DESCRIPTION: Stomatocyst 46 (Fig. 8B) is differentiated from stomatocysts 1 and 29 on the basis of pore morphology, and from stomatocyst 189 on the basis of size. A. tm). 1994). , 1992). LM DESCRIPTION: Stomato"jst 150 (Fig. 8E) is distinguished from stomatocysts 15 and 42 on the basis of pore morphology, and from stomatocyst 189 on the basis of size. Stomatocyst 205 is nearly identical, except that it is ornamented around the pore. , subm. (13) Figs. A. A. A. ). A. tm). LM DESCRIPTION: Stomatocyst 189 (Figs.
A. (Zeeb & Smol, 1993a). ) cyst 11 (= Carney & Sandgren, 1983 - cysta modica) . ECOLOGY: To date, this cyst has been found mostly in 47 o B o Fig. 32. Stomatocyst 125. A: SEM. B: Line drawing of SEM. C: LM. D: Line drawing of LM. Scale bar = 2 I'm. LM x2000. , 1992; Zeeb & Smol, 1993a; Sandgren & Carney, 1983). According to Pienitz et ai. A. A. (Smith & White, 1985 - Figs. 20 & 21). (1992), it is intolerant of very saline (> 10 mg/L) water. ECOLOGY: No autecological details are available. Stomatocyst 198, Duff & Smol, 1994 (4) Fig.
1992) sites. A. 5 cm. Stomatocyst 52, Duff & Smol, 1991 emend. Duff et al. (this volume) (12) Fig. 25 BIOLOGICAL AFFINITY: This stomatocyst is likely 42 Fig. 25. Stomatocyst 52. A: SEM . B: Line drawing of SEM. Scale bar = 2 JLffi. See Figs. 12C, D for LM. produced by more than one species. Nygaard (1956) suggested that it was produced by a Chromulina species, based on the descriptions of Huber-Pestalozzi (1941). P. A. 25 cm) sediment sample. SEM DESCRIPTION: This is an emended description of stomatocyst 52, based on new observations.