actinotaenium cucurbita Elfenmeer, a heathland pond April 2003
arthrodesmus octocornis pond near the Wupper dam May 2006
closterium acerosum garden pond, December 2002
closterium gracile Elfenmeer, a heathland pond Juni 2005
Closterium rostratum Alatsee, Austria, October 2006
closterium leibleinii botanical garden university Duesseldorf, spring 2001
closterium moniliferum garden pond between spaghnum January 2007
closterium spec. heathland pond, January 2022
In the terminal vacuoles of Closterium spec. you will find gypsum crystals that are showing a dance due to the Brownian motion.
Closterium spec. Terminal vacuoles with gypsum crystalsr; heathland pond, January 2022
closterium navicula botanical garden university Duesseldorf, spring 2001
closterium parvulum garden pond, February 2007
closterium pronum Emscherpark June 2004
closterium pronum is very long, but only a few µm wide. The picture is
composed of two different one. Now one can see the wholge algae at e relative high magnification.
closterium garden pond May 2005
end of vegetative cell-division
cygote of closterium striolatum. Cologne Wahn moor April 2006
10 pictures stacked withCombineZ5
cosmarium botrytis botanical garden university Duesseldorf, May 2005
cosmarium botrytis national horticultural show Duesseldorf, April 2006
early state of cell division that starts with a prolongation of the isthmus
and its following line out in the middle.
cosmarium caelatum Col de la Schlucht, Alsace, water-trickled rock August 2005
cosmarium holmiense var. hibernicum Schee Tunnel, water-trickled rock January 2007
cosmarium impressulum national horticultural show Duesseldorf, September 2006
cosmarium portianum Cologne-Wahn moor July 2004
Cosmarium reniforme Heathland pond June 2015
Oblique illumination
Cosmarium reniforme Heathland pond June 2015
Red chlorophyll autofluorescence
Cosmarium reniforme Heathland pond June 2015
Polarized light with lambda-retarder
cosmarium subcostatum var.minus national horticultural show Duesseldorf, May 2003
cosmarium subcucumis garden pond between spaghnum January 2007
cosmarium subcucumis garden pond between spaghnum January 2007
affection with bacteria, beginning corruption
cosmarium subcucumis garden pond between spaghnum January 2007
abnormality during the vegetative reproduction
cosmarium tetraophthalmus Cologne-Wahn moor May 2002
cosmarium tetraophtalmus botanical garden university Duesseldorf, spring 2001
Film, AVI-Format, 1,4 MB
cosmarium vexatum garden pond between spaghnum January 2007
cylindrocystis brebissonii Lac de Lispach, Alsace August 2005
desmidium swartzii Cologne-Wahn moor December 2006
desmidium swartzii Cologne-Wahn moor December 2006
6 pictures stacked with CombineZ5
Euastrum ansatum var. pyxidatum DELP Elfenmeer, a heathland pond April 2008
euastrum bidentatum Cologne-Wahn moor August 2002
Euastrum humerosum Elfenmeer November 2014
Bright field
Euastrum humerosum Elfenmeer November 2014
Dark field
Euastrum humerosum Elfenmeer November 2014
Chlrophyll autofluorescence
Euastrum humerosum Elfenmeer June 2008
Anomaly of twin-headed individuals
Euastrum humerosum Elfenmeer June 2008
Anomaly of twin-headed individuals
Euastrum humerosum Elfenmeer June 2008
Reduced growing
euastrum humerosum, var. affine Elfenmeer, a heathland pond June 2005
Euastrum insulare Hilden heathland, between sphagnum August 2007
Euastrum oblongum Elfenmeer, a heathland pond April 2008
eurastrum oblongum; cygote Cologne-Wahn moor spring 2001
Euastrum verrucosum Elfenmeer, a heathland pond near Roermond Aril 2008
Stack of 6 pictures
Euastrum verrucosum Elfenmeer, a heathland pond near Roermond Aril 2008
Focus on surface
Gymnozyga (Bambusina) spec. Galgenvenn March 2013
Brightfield and Chlorophyll autofluorescence in 365 nm UV-excitation
Hyalotheka dissilens Elmpter Schwalmbruch January 2022
Darkfield
Hyalotheka dissilens Elmpter Schwalmbruch January 2022
gelatinous sheath
Hyalotheka dissilens Elmpter Schwalmbruch January 2022
gelatinous sheath in phase contrast technique
Hyalotheka dissilens Elmpter Schwalmbruch January 2022
gelatinous sheath
mesotaenium spec. atmophytic in a gelantin between mosses, garden January 2007
mesotaenium spec. atmophytic in a gelantin between mosses, garden January 2007
the layered gelantin is visible with phase contrast
micrasterias americana Schwalm-Nette area, white stone December 2006
2 pictures stacked with CombineZ5
micrasterias americana Cologne-Wahn moor May 2003 und 2004
2 different individuals, left in flat-position, right side-face view
Micrasterias brachyptera Seethaler lake near Tamsweg, Austria September 2007
Micrasterias denticulata Elmpter Schwalmbruch August 2008
Micrasterias denticulata Birgelen, virgin forest April 2013
Micrasterias papillifera Elfenmeer, a heathland pond April 2008
Micrasterias papillifera Elfenmeer, a heathland pond April 2008
In phasecontrast also the gelantine shell is visible. This gelantine enables the algae to move
around a bit.
Micrasterias rotata Schwalm-Nette aerea, white stone April 2008
Micrasterias rotata Gardenpond September 2016
Micrasterias rotata Schwalm-Nette aerea, white stone April 2008
Darkfield
Micrasterias rotata Schwalm-Nette Gebiet April 2016
Chlorophyll Autofluorescence, excitation Royal Blue LED.
Micrastrerias thomasiana var. notata Rolvennen, a heathland pond May 2007
Micrastrerias thomasiana var. notata Rolvennen, a heathland pond May 2007
Dark field
Micrasterias truncata Galgenvenn, a heathland pond September 2009
Micrasterias truncata Elmpter Schwalmbruch September 2018
Polarizrd light with lamda retarder
Micrasterias truncata Galgenvenn, a heathland pond March 2013
Chlorophyll Autofluorescence, excitation with 365 nm Nichia LED
Micrasterias truncata var. semiradiata Rolvennen, a heathland pond April 2008
Mougeotia scalaris Cologne-Wahn moor, March 2002
in conjugation
Netrium digitus Heathland pond, June 2015
netrium interruptum var. minor Lac de Lispach, Alsace August 2005
penium spirostriolatum Emscherpark, August 2002
Pleurotaenium ehrenbergii Elfenmeer May 2008
Pleurotaenium ehrenbergii garden pond May 2015
Dunkelfeld
Pleurotaenium ehrenbergii garden pond May 2015
Polarisiertes Licht
Pleurotaenium ehrenbergii garden pond May 2015
Vacuole with crystals, Brownian motion
spirogyra spec. garden pond February 2007
Cell with nucleus in the middle
Spirogyra spec. stome pit near kerpen April 2007
early phase of conjugation
Spirogyra spec. stome pit near kerpen April 2007
early phase of conjugation
spirogyra spec. Urdenbach floodland May 2004
formation of cygotes
Spirogyra spec. Garden pond April 2019
Red Chlorophyll Fluorescence
Spirogyra spec. Garden pond April 2019
Bright field foto of above red chlorophyll fluorescence