MSCI 210 Lecture Notes - Lecture 14: Carbon Fixation, Ecological Pyramid, Photosynthesis
Document Summary
Productivity in the oceans: vertical zones in the sea are based on light. Extends from the surface to a depth at which marine plants cannot survive (1% light) Depth varies depending on water turbidity (amount of particles) Biomass: amount of living matter in given amount of space (gcm^3) Productivity: rate of change of biomass (gc/m2/hr) Primary (1o) productivity: rate of synthesis of organic matter from inorganic matter (by photosynthesis or chemosynthesis) also called carbon fixation. Secondary (2o) productivity: rate of acquisition of organic matter by consumer organisms (herbivory, carnivory, omnivory, and decomposition) Food web relationships: (complexities of who"s eating whom, when, where, and how: primary productivity. 1 deg. productivity in ocean is extremely high, higher than rain forests. The rate of photosynthesis is a measure of primary productivity. Pp can vary with latitudes as well. In the spring there is a phytoplankton bloom, fall too. (north temperate areas)
