Luokat: Kaikki - microorganisms - spores - radiation - temperature

jonka sitifadhilah abdrahim 11 vuotta sitten

428

Atmospheric Habitat

Microorganisms thrive in various atmospheric habitats, particularly in the lower troposphere where they are present in high numbers. These microorganisms, including spores, are well-adapted to survive and disperse through air currents, precipitation, and thermal gradients.

Atmospheric Habitat

Atmospheric Habitat

dispersal of airbone particles

3 stages
deposition
dispersion in air current
liberation and take-off into the air

physical features of the aerial environment

precipitation
radiation
air movement in the troposphere

atmosphere

example of micororganisms
sporea are better adapted to the atmosphere

type

endospores

forms that are primarily adapted to resistance rather than production

xenospores

forms that are primarily adapted to reproduction vs resistance to environmental stress

small size and low density

some are pigmented

thick cell wall-against dessication

produced in high number

low metabolic rate

precipitation aids deposition
air movement provide means of dispersal
thermal gradient causes rapidmixing allowing for dispersal of microbes
lower trophosphere contains high number of microbes

other extreme environments

ionizing radiation
lack of nutrient, water availability
toxic chemicals
irradiation
pH
high or low temperature
severe condition

region

troposphere
characteristics

Subtopic

water

organic carbon

conc. 02

atm pressure

air temperature

nearest to the earth
lonosphere
extreme uv and ionizing radiation levels
exosphere
helium and H2 predominant
extending into outer space
thermosphere
temperature increases with altitude
mesophere
temperature decreasing with height
stratosphere
lacking liquid water
extreme low temperature
location of 'good' ozone, limits uv light
increasing temperature with height

composition

other gases
carbon dioxide
oxygen
nitrogen