BIOLOGY 1101 Lecture Notes - Lecture 29: Biogeochemistry, Bioaccumulation
6 Sep 2016
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Document Summary
How different organisms, including you, are linked over time and across geographic space by chemical interactions. (nitrogen and phosphorous) Changing the chemical balance of an ecosystem changes the biological balance. Damaged ecosystems can be repaired to some extent. The primary producers of aquatic ecosystems are usually limited by either n or p (oligotrophic) The dose is the poison, but the solution is not dilution. Ecosystems are susceptible to small changes because of low concentration. The nutrient (n or p) is locked in a many different large organic polymers (protein, membranes, dna, atp, etc) Inaccessible to primary producers for uptake, must be released (coverted to inorganic) by decomposers. The nutrient is in a much smaller form (nh4, no3, no2, po4)
