atmospheric habitat

1. dispersal vs growth

1.1. low atm support growth

1.2. spores better adapted to environment

1.2.1. low metabolism rate

1.2.2. produce in high rate

1.2.3. thick cell walls - against dessication

1.2.4. some pigments - protect against UV

1.2.5. small size - low density

1.3. xenospores vs endospores

1.3.1. xenospores form on or in specialized structures

1.3.2. endospores form within the vegetative cell

1.4. xenospores and endospores

1.4.1. very low metabolic rate

1.4.2. thick cell wall - protect against dessication

1.4.3. pigmentation protect agains UV light

2. physical features of aerial environment

2.1. air movement in troposphere

2.2. radiation

2.3. percipitation

2.4. percipitation

3. dispersal of airborne particle

3.1. liberation & take off into the air

3.2. dispersion

3.3. deposition

4. other extreme environment

4.1. hot spring

4.2. acid springs and lakes

4.3. antarctica

4.4. salt lakes

5. composition

5.1. nitrogen

5.2. oxygen

5.3. carbon dioxide

5.4. others gas

6. region

6.1. troposphere

6.2. stratosphere

6.3. mesosphere

6.4. thermosphere

6.5. ionosphere

6.6. exosphere