Define the four types of microbial habitats found in aquatic environments.
The planktonic environment refers to microbial communities suspended in the water
The Strategies of Two Bacterial
Genera Common in Soil
How do they live in the soil?
Arthrobacter- Oligotrophic bacteria. Slow growth.
-Pleomorphics, rods or cocci under different nutritional conditions.
What is Soil?
1) Weathered end product of
action of climate and living
organisms on soil parent
material with a particular
topography, over time
2) A dynamic natural body
composed of mineral and
organic materials and living
ANSWERS TO QUESTIONS
Raina M. Maier and Ian L. Pepper
Calculate the volume of bacterial biomass in one gram of soil, given the following
assumptions: soil bacteria are small spheres of diameter 1 m, the total number of
Major Ecosystems of the World
I. Earths Major Biomes
A. A biome is a large, relatively distinct terrestrial region with a similar climate, soil,
plants, and animals
i. It encompasses many interacting ecosystems
A proper understanding of the diversity, systematics and nomenclature of microbes is increasingly
important in many branches of biological science. The molecular approach to phylogenetic
analysis, pioneered by Carl Woese in the 1970s and leading to the th
Microorganisms other than viruses can be defined as free-living organisms
that are so small that they cannot be seen with the naked eye. Generally, this
size range is less than 100 m, but defining microbes just in terms of size can
be confusing since som