Isle of Islay 2000

 
Loch Tallant is a shallow loch in a nutrient-poor peaty basin:
marginal vegetation is gradually encroaching on the open water and the loch is now only a remnant of the original.

 

Loch Connailbhe, an upland loch in the Rinns of Islay

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L. Conailbhe
L. Tallant
Ankistrodesmus
+
Aphanocapsa
(a)  (b)
(c)  (d)
(a, c) focussed on upper surface of colony
(b, d) focussed on edge of colony

Cyanobacteria: globular cells evenly spaced
in colonial mucilage;
frequently in pairs.
No pseudovacuoles
+
+
Aphanothece
Cyanobacteria: elongate cells in colonial mucilage
+
Asterionella
Diatom
+
Botryococcus sp.
Chlorophyte
(these two images of iodine-stained colonies
+
 
(unstained)
+
Caloneis silicula
Diatom
+
Ceratium sp.
Dinoflagellate
+
Chroococcus
+
Closterium acutum
Desmid
+
Closterium ?costatum
Desmid
+
Closterium juncidum
Desmid
+
Closterium ?ralfsii
Desmid
+
Closterium setaceum
Desmid
+
Closterium ulna
+
Coelastrum sp.
 This colony has been stained with Lugol's Iodine:
Chlorophyte: spherical or polygonal cells forming a hollow ball
+
Coelosphaerium sp.

(a)  (b)  
(a) "natural colours", focussed on top surface
(b)"natural colours", focussed on edge of colony

(c)   (d)
(c) Preserved with Lugol's Iodine: surface
(d) Lugol's: focussed on colony edge

Cyanobacteria: Cells in a 3-dimensional colony; in pairs or multiples. No individual or group sheaths visible: cells appear to be distributed at the periphery of the colony
+
Cosmarium ?blyttii
Desmid
+
Cosmarium depressum
Desmid
+
Euastrum bidentatum
Desmid
+
Euastrum denticulatum
Desmid
+
Euastrum dubium
Desmid
+
Euastrum oblongum
Desmid
+
Euastrum verrucosum
Desmid
+
Fragilaria capucina
Diatom
+
+
Glaucocystis
Glaucophyta
+
Gloeocapsa
Cyanobacteria:
+
+
Gloeocystis
Chlorophyte
+
Gomphosphaeria sp.
 
Cyanobacteria: cells heart-shaped or round,
at the end of radiating
strands of mucilage
+
+
Massartia sp.
Dinoflagellate
+
Merismopedia
Cyanobacteria
+
Micrasterias crux-melitensis
Desmid
+
Microcystis
 
Cyanobacteria: cells crowded in colonial mucilage.
+
+
Mougeotia sp. 8µm.
Chlorophyte
+
Navicula radiosa

 

Diatom
+
Netrium interruptum
Desmid
+
Nitzschia sigmoidea
Diatom
+
Oedogonium 6µm
Chlorophyte
+
+
Oedogonium 11µm
Chlorophyte
+
Ophiocytium
Xanthophyte
+
Oscillatoria sp.
Cyanobacteria
+
Pediastrum sp.
Chlorophyte: cells adjoined to form circular plates,
with the marginal cells frequently different from the internal
ones (often ornamented with protuberances)
+
Pediastrum boryanum
Chlorophyte
+
Pediastrum sp. (?boryanum)
Chlorophyte
+
Pinnularia cardinalicus
Diatom
+
Scenedesmus quadricauda
Chlorophyte
+
Sorastrum sp.
   
Chlorophyte
+
Spirulina
Cyanobacteria
+
Staurastrum armigerum fo. furcigerum

Desmid
+
Synechococcus sp.
     
Cyanobacteria:
+
Tabellaria floculosa
Diatom
+
Tabellaria fenestrata v. fenestrata
Diatom
+
Tribonema 6µm
 
Xanthophyte
+
Xanthidium antilopeum
 
Desmid
+
Xanthidium cristatum
 
Desmid (fixed Lugol's iodine)
+

 

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Page last updated 08/12/19

John Kinross