Some of them are aerobic (need oxygen), while

Bacteria. Bacteria are unicellular organisms without a cell nucleus. They can be found in all parts

water column, sediment surface, and >> << rain itself. Some of them are aerobic (need oxygen), while others

anaerobic (not requiring oxygen). Most bacteria

free life, but some live as partners (symbionts) in other organisms >>. << For example, many deep sea fish harbor symbiotic bacteria

, emitted light that fish used for signaling other members of th

species. The ability of bacteria to emit light, called bioluminescence

. Bioluminescence makes water glow phenomenon most

visible on the surface, but also to be present at all strattera depths. Cyanobacteria, such as bacteria, plays an important role in the history

Earth and ocean processes, including development of stromatolites

(see photo on page 80). Life in the colony, >> << cyanobacteria producing oxygen during photosynthesis

caused the oxygen in Earth's atmosphere that many creatures >> << require life today. Although cyanobacteria also called

blue-green algae, it is important to remember that

cyanobacteria are related bacteria and algae. They, however

, associated with the chloroplasts in algae, chloroplasts use

certain plants for food is actually cyanobacteria living in the wall

plant cells. Some marine bacteria may interact with diatoms, another type of marine microbes >> <<, thus affecting the cycle of silicon in the ocean >>. << Diatoms, a group of unicellular algae, differ

a lot of two-part shell-like structures on silicon. One type of bacteria,

Thiomargarita namibiensis,

plays an important role in hydrogen sulfide eruptions from diatomaceous >> << precipitation of Africas Namibia coast. Known as sulfur pearl of Namibia

This anaerobic species digests

organic matter under low oxygen (or no oxygen) conditions caused by

high growth rates of phytoplankton in the Benguela upwelling zone, and

followed the collapse of large masses of dead phytoplankton that

down to the bottom. S) in bottom sediments. Over time, the gases are created and periodically

released in the water column in sulphide eruptions. In >> << surface water, H

S is oxidized to sulfur microgranules, bleaching it green milk. These surface characteristics can be observed by satellites (see photo on

p 81). .