Freshwater Algae from Millport Reservoir

Collected during the MSc Biology of Water Resource Management's April 2002 field trip to the Marine Station

(For the 2003 results, click HERE)

The class remit was to perform a microbiological examination of the tourist beaches, then come up with (theoretical) design recommendations for sewage treatment, and for drinking water purification based on an old reservoir. We sampled the algae as a guide to the quality of the fresh water supply.

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(most algae are illustrated elsewhere in the pages: see INDEX, and are not reproduced on this page: see some other years, however.)

Millport Reservoir Plankton

Chrysophyta
Dinobryon: dominant

Diatoms:
Asterionella
Melosira (Aulacoseira)
Gyrosigma

Chlorophyta
Botryococcus
Chlorococcum (?)
Closterium sp.
Closteriopsis
Mougeotia
Pediastrum boryanum
Scenedesmus quadricaudum
Sphaerocystis

Dinoflagellates:
Ceratium

Blue-greens:
Anabaena
Microcystis
Oscillatoria

Millport Reservoir Periphyton


1:growing on dam walls:
Chlorophyta:
Cladophora = dominant
Mougeotia
Oedogonium
Pediastrum boryanum
Spirogyra
?Tetraspora

Diatoms:

Cymbella
Synedra ?acus

Blue-greens:

Chamaesiphon
Oscillatoria

2: growing on spillway:

Rhodophyta:

Asterocystis = dominant

     
   


Asterocystis has globular or oval cells arranged in a linear series within a gelatinous sheath, forming a false filament. The sheath may be branched. The bluish colour might lead one to suspect a cyanobacterium ("blue-green alga"), but the cells clearly have chloroplasts, more easily seen in some of the cells from the distal portion of the filament. The chloroplasts are stellate, but this is not very clear: look at the large cell in the fourth image.


Chlorophyta:

Chaetophora
Cladophora
Geminella
Mougeotia 20Ám
Oedogonium 20Ám
Pediastrum
Stigeoclonium
Ulothrix

Diatoms:

Asterionella
Cymbella
Gomphonema truncatum

Blue-greens:

Oscillatoria 3Ám


[snaps]


John Kinross