21345bw

21345bw
Caption: Fresh water pennate diatom frustule (skeleton) found in a polluted stream. Often diatoms can be used as indicator species to determine the extent of polluted waters. As water becomes polluted, two things usually happen -- species diversity lowers, and population density of the remaining species increases (often indicated by certain diatom species occurring in high density).
Magnification*: x1,600
Type: SEM
Copyright 2004 Dennis Kunkel Microscopy, Inc.
Keywords: 01.01.04,21345bw,alga,algae,aquatic,b/w,diatom,eukaryote,fresh water,Hawaii,indicator species,pennate diatom,polluted water,silica frustule,silica skeleton,SEM