unclassified Trebouxiophyceae

Dictyosphaerium spec. in mucilaginous envelope. Scale bar indicates 25 µm.  Sample from sphagnum pond situated in the northern alpine region of Austria near Salzburg. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.

Portrait of Dictyosphaerium pulchellum (Nägeli,1849), a colonial green alga. The small cells are ovoid to reniform and are borne at the ends of colorless branching threads in groups of four. The threads are remnants of parental cell walls. Each cell has a cup-shaped chloroplast and solitary pyrenoid.The entire colony is embedded in a nearly invisible spherical gelatinous matrix. Collected from a freshwater pond near Boise, Idaho June 2004. DIC optics.

Botryococcus braunii (Chlorophyta, Chlorococcales) is a colonial chlorophyte, made of ovoid cells that are closely packed to form golden brown mucilaginous lumps. Older cells usually have large amounts of reserve food material (oil) such that the cell contents are obscured, and the colonies float. The species is abundant at times, forming surface scums at lee shores. On a single occasion in January 2000 a bloom of this species covered the entire lake for several days, giving it a golden color, then disappeared abruptly. This photo shows Botryococcus braunii colonies at x200 mag, with their typical mucilaginous strands connecting colonies and enveloping them.

Galende, Castille and Leon, Spain

San Martn de Castaeda, Castilla y Len, Espaa

Miranda do Douro Municipality, Braganca, Portugal

Dictyosphaerium spec. in mucilaginous envelope. Scale bar indicates 10 m.The specimen was gathered in the wetlands of Nationalpark Unteres Odertal ( 100 km north east of Berlin). The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Muelas del Pan, Castille and Leon, Spain

Miranda do Douro Municipality, Braganca, Portugal

Scale bar indicates 25 µm.Sample from the pond Hegne Moor situated in the vicinity of Lake Constance. The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Bog Hegne Moor near Lake Constance (Germany) Latitude: 47,718106 Longitude: 9,093974 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 25 µm. Probe aus dem Simmelried nahe Konstanz. Mikrotechnik: Zeiss Universal, Kamera: Olympus C7070. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Botryococcus braunii in mucilaginous envelope. Scale bar indicates 25 µm. Sample from a small wetland near Schladming (northern alpine region of Austria near Salzburg). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Wetland near Schladming (Austria) Latitude: 47,37386 Longitude: 13,823016 Botryococcus braunii in Gallerthülle. Der Messbalken markiert eine Länge von 50 µm. Probe aus einer Wiesenvernässung nahe Schladming/Österreich. Mikrotechnik: Zeiss Universal, Kamera: Olympus C7070. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Portrait of Dictyosphaerium pulchellum (Nägeli,1849), a colonial green alga. The small cells are ovoid to reniform and are borne at the ends of colorless branching threads in groups of four. The threads are remnants of parental cell walls. Each cell has a cup-shaped chloroplast and solitary pyrenoid.The entire colony is embedded in a nearly invisible spherical gelatinous matrix. Collected from a freshwater pond near Boise, Idaho June 2004. DIC optics.

A young colony of Botryococcus braunii (Chlorophyta, chlorococcales) budding out of an old colony, photographed at x1000 mag. Note cup-shape of the mucilage in which each cell is embedded.

Ribadelago, Castille and Leon, Spain

Melgar de Tera, Castille and Leon, Spain

Miranda do Douro Municipality, Braganca, Portugal

Dictyosphaerium spec. in mucilaginous envelope. Scale bar indicates 25 m.The specimen was gathered in the wetlands of Nationalpark Unteres Odertal ( 100 km north east of Berlin). The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Hoyo de Manzanares, Madrid, Spain

Botryococcus braunii in mucilaginous envelope. Scale bar indicates 50 µm. Sample from a small wetland near Schladming (northern alpine region of Austria near Salzburg). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Wetland near Schladming (Austria) Latitude: 47,37386 Longitude: 13,823016 Botryococcus braunii in Gallerthülle. Der Messbalken markiert eine Länge von 50 µm. Probe aus einer Wiesenvernässung nahe Schladming/Österreich. Mikrotechnik: Zeiss Universal, Kamera: Olympus C7070. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Dictyosphaerium pulchellum is a common chlorophyte of Lake Kinneret, relatively more abundant in winter, but never dominant. This specimen was sampled at the shore of the lake in March 2006.

Botryococcus braunii (Chlorophyta, Chlorococcales) is a colonial chlorophyte, made of ovoid cells that are closely packed to form golden brown mucilagenous lumps. Older cells usually have large amounts of reserve food material (oil) such that the cell contents are aboscured, and the colonies float. The species is abundant at times, forming surface scums at lee shores. On a single occassion in January 2000 a bloom of this species covered the entire lake for several days, giving it a golden color, then disappeared abruptly. This photo shows Botryococcus braunii colonies at x200 mag, with their typical mucilagenous strands connecting colonies and enveloping them.

San Martin De Castaneda, Castille and Leon, Spain

Ribadelago, Castille and Leon, Spain

Miranda do Douro Municipality, Braganca, Portugal