Categories: All - ecosystem - microorganisms - freshwater - marine

by najatullah siddiqi 11 years ago

269

Microorganisms in Marine and Freshwater Ecosystem

In aquatic environments, both marine and freshwater ecosystems exhibit diverse microbial life. In the marine ecosystem, cyanobacteria thrive in the open ocean and photic zone, while virioplankton are prevalent in pelagic zones.

Microorganisms in Marine and Freshwater Ecosystem

Microorganisms in Marine and Freshwater Ecosystem

Freshwater Ecosystem

lakes
light penetration

littoral zone

temperature

hypolimnion

thermocline

epilimnion

eutrophic

nutrient-rich

anoxic

oligotrophic

nutrient-poor

oxic

streams & rivers
lentic

free standing

lotic

free running

nutrients

allochthonous

out-stream sources

autochthonous

in-stream production

glaciers & permanently frozen lake
support a variety of m/os

e.g thick ice caps that block solar radiation

Marine Ecosystem

benthic marine environment
hydrothermal vents
seafloor
ocean sendiments
aquatic viruses
virioplankton
open ocean
photic zone
pelagic zone
cyanobacteria
estuaries & salt marshes
bottom

ferment prodct accumulation

anaerobic m/os

anerobic respiration using sulfate

fermentative m/os

anaerobic condtion

halotolerant

Water as Microbial Habitat

nutrient cycling
light
gases