Complex sentence: Most trapped particles are more vulnerable to grazers than they would be as free floating individuals and can be classified as "olive green" or "gray body" cells, which are plant parts and degrading plant material.
Split into simpler sentences: Most trapped particles are more vulnerable to grazers than they would be as free floating individuals. Many trapped particles can be classified as "olive green" or "gray body" cells, which are plant parts and degrading plant material.