Aquatic Microbiology studies the ecology of micro-organisms in aquatic environments. Aquatic micro-organisms include viruses, bacteria, phytoplankton, fungi, and zooplankton.It can be molecular based all the way up to larger scale ecosystem levels.

Here is a good slide review of the field and it' is very much worthwhile to go through it.

Folks always carry on about how they want to learn, well:

Introduction

It's easy to read and work through.

Give it a read, most hobbyists know very little about things that play such a large role in our tanks.

Regards,
Tom Barr

And stuff you can podcast for your drive to work,

UC Berkeley Webcasts | Video and Podcasts: Bio 1B

Bio 1B General Biology

Wed 1/17 Introduction/Fungi
Fri 1/19 Algae/Mosses/Lower Vascular Plants
Mon 1/22 Ferns and Gymnosperms
Wed 1/24 Angiosperms
Fri 1/26 Angiosperms
Mon 1/29 Cells/Tissues
Wed 1/31 Roots/Structure/Development
Fri 2/2 Shoots/Primary Structure
Mon 2/5 Shoots/Secondary Structure
Wed 2/7 Plant Growth Substances 1
Fri 2/9 Plant Growth Substances 2
Mon 2/12 Flowering
Wed 2/14 Water Relations
Fri 2/16 Water Relations/Mineral Nutrition
Mon 2/19 Bio1B - Lecture 15 - President's Day
Wed 2/21 Mineral Nutrition/Fruit Development/Discussion of Midterm
Fri 2/23 Darwin and The Origin

Here is more and an excellent paper on the Florida EverGlades.

Regards,
Tom Barr