Field Notes Journal a personal natural history of place

IV.2 Examination of Freshwater Algae

Aim

To observe the structure of filamentous algae.

Specimen & Apparatus

• Filamentous algae from pond edge or wet surface
• Forceps or pipette
• Slide and coverslip
• Water
• Compound microscope

Method

1. Collect a small portion of algae.
2. Place on a slide with a drop of water.
3. Arrange the filaments so they lie flat.
4. Apply a coverslip carefully.
5. Examine under low and then higher magnification.

Observations to Make

• Arrangement of cells within filaments.
• Shape and size of individual cells.
• Presence of internal structures.
• Any variation along the filament.