Bacteria in wetland soils break down organic and inorganic structures. Most common are the Eubacteria and Archaebacteria kingdoms that include prokaryote bacteria. Most bacteria are heterotrophic, meaning they break down existing organic compounds to harvest the carbon and other atoms needed to survive. Bacteria can also be autotrophic meaning they manufacture their own organic molecules. They do this, depending on species, through photosynthesis using light, or chemosynthesis, oxidizing inorganic molecules to make organic molecules. (Solomon & Berg & Martin & Villee, 1993)There are several kinds of photosynthetic bacteria, all Eubacteria. Cyanobacteria use red/blue light like algae and plants. The green sulfur, purple sulfur, green nonsulfur and purple nonsulfur use near infrared light. No water is involved so no oxygen is produced. The green sulfur bacteria have chlorophyll similar to chlorophyll a, but are anaerobic using hydrogen/sulfur compounds (H2S) not water (H20) as an electron donor. (Gould, James L.& Keeton, William T. with Grant, Carol, 1996) Sulfur bacteria use sulfur compounds as a hydrogen source producing sulfur as a byproduct. While most autotrophic bacteria are aerobic, some are anaerobic, and some can use oxygen or not (facultive anaerobes). (Solomon & Berg & Martin & Villee, 1993, pp. 515-523)