Observation 4 --- Week 6 (Extra observation on 20th Nov)

Because of missing one observation in week 2, I appreciate that our instructor Mr Mcfarland allows me do an extra observation on 20th Nov. In this observation, i have seen  lots of organisms appears in past observation. of course, more new organisms still can be find, and this time i find some other diatoms which really has a interesting shape.

1.melosira
other than the rectangle shape fragellaria i found in last observation, melosira is another diatom that have a geomatric shape. This square shape substance has a golden color under microscope and keep stationary for the whole time.

  Fig 17.1

if we see closely , we can see substance moving within the square. the figure below provides closer look. 

 Fig 17.2

Referance:

    Canter-Lund H and Lund J.1995. Freshwater Algae. Bristol: Biopress Limited. Fig 250-252, 138 p.

2.gomphonema 

This is another diatom. it does not have a very rigid shape as melosira and fragellaria. it likes to attach to the plant, but I found this one stay alone by itself. it also have a golden color under microscope. 

Fig 18.1

if we see closely enough , we can also see substance moving within itself. the figure below provides closer look. 

Fig 18.2 

Referance:

    Canter-Lund H and Lund J.1995. Freshwater Algae. Bristol: Biopress Limited. Fig 230-231, 128 p.

 3. Euglena

 This organism appears as a black dot under microscope, very small and move slowly.i found it near the plant. 

 Fig 19.1

 Fig 19.2

 Referance:

    Patterson DJ.1992. Free-Living Freshwater Protozoa. Washingon DC: ASM Press. Fig 118-122, 61 p.

 4. Raphidiophrys

 this orgamism has a round shape but have lots of flagella point out from the inside of this substance. it doest not move and i found them around the dirt or near the plant. 

 Fig 20.1

 Here is a closer look of this organism. 

 Fig 20.2

   Referance:

    Patterson DJ.1992. Free-Living Freshwater Protozoa. Washingon DC: ASM Press. Fig 405-408, 173 p.

 5. Unkown substance

 This is just a substance having irragular shape, and during the observation, i can see smaller organism moving from the irragular shape substance to the round unknown organism. I ask Mr McFarland about it, he was not sure about it either. 

 Fig 21