BIOL 1108 Study Guide - Midterm Guide: Electron Acceptor, Anammox, Redfield Ratio
Document Summary
Chapter 48 - biomes and global ecology (review) Decomposers return nitrogen to the atmosphere by denitrification, nitrification, or anammox. A form of anaerobic respiration in which nitrate, rather than oxygen, serves as the terminal electron acceptor. A chemoautotrophic process that uses energy gained from the oxidation of ammonia or nitrate by oxygen. Chemoautotrophy with energy gleaned from the reaction of. Most primary producers cannot assimilate directly from its largest reservoir of ammonia and nitrite nitrogen gas in the atmosphere. Biological nitrogen cycle depends on nitrogen fixation. Phosphorus cycles through ecosystems, supporting primary production. Phosphorus and nitrogen are the key limiting nutrients in most biomes. Phosphorus can only enter the food web as phosphate ion when it is released from rocks by chemical weathering and then taken up by primary producers. Global patterns of primary production reflect variations in climate and nutrient availability. Upwelling zones are regions of high primary production.
