-
-
Description: Español: Hugo Acevedo Cafetero reconocido hincha de boca, zona oeste de Villa Ballester desde 1999 benedetto 9 de diciembre, meme cafe. Date: 20 May 2019. Source: Own work. Author:
BrianAlabama. villa ballester, lado oeste Licensing[
edit] : This file is licensed under the
Creative Commons Attribution-Share Alike 4.0 International license. :. You are free: to share – to copy, distribute and transmit the work to remix – to adapt the work Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the
same or compatible license as the original. https://creativecommons.org/licenses/by-sa/4.0 CC BY-SA 4.0 Creative Commons Attribution-Share Alike 4.0 truetrue.
-
This image was of material in samples taken during a scientific cruise in the Pacific. Water was filtered to concentrate the organisms that were present, then dried onto a thin sheet of plastic and then shadowed with a fine layer of metal to provide contrast. The preparation was then observed with an electron-microscope. This technique has been used to document the diversity of marine microbes, especially, protists in the oceans.
-
Cafeteria (cafeteria) is probably the most abundant heterotrophic flagellate in marine ecosystems. It is a voracious bacterivore. Sessile feeding cells are D-shaped, 1.5 to 10 microns long, and laterally compressed. There is a ventral groove, and the flagella insert at the head of the groove. The anterior flagellum draws a current of water towards the cell, or pulls the cell forward when it is swimming around. Feeding cells are usually attached to the substrate by the tip of the second flagellum. This cell is a little swollen. Animations by Rosemary Arbur of flagellar beat patterns are available
here.Phase contrast.
-
Cafeteria (cafeteria) is probably the most abundant heterotrophic flagellate in marine ecosystems. It is a voracious bacterivore. Sessile feeding cells are D-shaped, 1.5 to 10 microns long, and laterally compressed. There is a ventral groove, and the flagella insert at the head of the groove. These cells have been disturbed, and are not feeding. The anterior flagella have the sine-wave beat pattern that is characteristic of stramenopiles. The posterior flagella are shorter. Phase contrast.
-
Cafeteria (cafeteria) is probably the most abundant heterotrophic flagellate in marine ecosystems. It is a voracious bacterivore. Sessile feeding cells are D-shaped, 1.5 to 10 microns long, and laterally compressed. There is a ventral groove, and the flagella insert at the head of the groove. The anterior flagellum draws a current of water towards the cell, or pulls the cell forward when it is swimming around. Feeding cells are usually attached to the substrate by the tip of the second flagellum. Phase contrast. Rotten picture.
-
Cafeteria (cafeteria) roenbergensis Fenchel and Patterson, 1988. Cells are D-shaped, 2 to 5 microns long, and laterally compressed. There is a shallow groove on the left side of the cell. Two flagella of similar length emerge subapically and are slightly longer than the cell. The anterior flagellum is directed perpendicular to the ventral face of the cell of attached cells. The posterior flagellum is reflexed, passing over one face of the cell and then attaching to the substrate by the tip. In swimming cells, the anterior flagellum is directed forwards and beats with a sine-wave, and the posterior flagellum is directed backwards and trails. Usually the cells move fast following a spiral path, but sometimes move slowly. Bacteria may be ingested near the anterior part or posterior part of the ventral groove. Not common in sediments, widespread and abundant in the water column.
-
Cafeteria roenbergensis Fenchel and Patterson, 1988. Cells are D-shaped, 2 to 5 microns long, and laterally compressed. There is a shallow groove on the left side of the cell. Two flagella of similar length emerge subapically and are slightly longer than the cell. The anterior (= feeding = hairy - the hairs are not visible by light microscopy) flagellum is directed perpendicular to the ventral face of the cell of attached cells. The posterior flagellum is reflexed, passing over one face of the cell and then attaching to the substrate by the tip. In swimming cells, the anterior flagellum is directed forwards and beats with a sine-wave, and the posterior flagellum is directed backwards and trails. Usually the cells move quickly following a spiral path, but sometimes they move slowly. Bacteria may be ingested near the anterior part or posterior part of the ventral groove.
-
-
Cafeteria is a weed. When plenty of bacterial food is available, species of this genus will grow in great profusion. Dozens of cells are seen here near a piece of detritus. Animations by Rosemary Arbur of flagellar beat patterns are available
here. Phase contrast microscopy.
-
Cafeteria (cafeteria) minuta (Ruinen, 1938) Larsen and Patterson, 1990. Cells are about 4 - 6 microns long with a small ventral groove. Two flagella emerge from the anterior end of the groove. The long anterior flagellum is about 2.5 - 4 times the cell length and beats with a sine-wave, and the posterior flagellum is about 1 - 1.5 times the cell length. When the cells swim, the anterior flagellum is directed forward and the posterior one trails. The cells may attach to the substrate by the tip of the posterior flagellum. Not common.
-
Cafeteria minuta (Ruinen, 1938) Larsen and Patteron, 1990. Cells are almost globular, 3.5-4 microns but with a subapical ventral depression from which the flagella emerge. The hairy or feeding flagellum (the hairs are not visible with the light microscope), which projects in front of the swimming cell, measures 10-12 microns, and may beat with more than one complete sine wave along its length. Second flagellum about 5 microns, curves over the side of the body and may attach by its tip to the substratum.
