Figure 1: The chloroplasts are visible in these sphere-shaped green protists.
Figure 2: Group of Volvox pictured together containing various numbers of cells within their colonies.
Order: Volvocales
Family: Volvocaceae
Collection Date: September 20, 2015
Habitat: Quiet ponds, open water, puddles, ditches, shallow ponds, bogs, freshwater
Location: Observation Pond - Hiram College Field Station - Hiram, OH
Description: Green protists, oval shaped, up to 50,000 individual cells within a gelatinous sphere, spin through the water, up to 1 mm (colony)
Collector: Caroline Georskey
Key Used: Rainis, K.G, Russell, B.J.1996. Guide to Microlife. A Division of Grolier Publishing. Danbury, CT.
Key Steps:
- Shape Key pp. 30 --> Volvox #70 pp.153
These colonies were first studied by Antonie van Leeuwenhoek in 1700, and have since been used as a genetic model for study of morphogenesis (Britannica). Volvox is known to exhibit differentiation, which is considered to be significant in tracing the evolution of higher animals from microorganisms (Britannica).
Links:
http://www.britannica.com/science/Volvoxhttp://www.eol.org/pages/11637/overview
http://microscopy-uk.org.uk/mag/art97b/volvoxms.html
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/V/Volvox.html
http://micro.magnet.fsu.edu/optics/olympusmicd/galleries/moviegallery/pondscum/protists/volvox/index.html
http://botany.si.edu/projects/algae/
http://www.energy.gov/eere/bioenergy/algal-biofuels
http://tolweb.org/accessory/Algae:_Protists_with_Chloroplasts?acc_id=52
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