BIOB50H3 Chapter Notes - Chapter 19: Chemosynthesis, Biome, Herbaceous Plant
Document Summary
Water from vents is rich in sulfides as well as heavy metals which inhibit metabolic activity in most organisms. Two mysteries from hydrothermal vents: what is source of energy that sustains organisms, how do the organisms tolerate high concentrations of potentially toxic sulfides in water. Lindeman grouped organisms in a lake into categories based primarily on how they obtained their energy: first in area of ecosystem science. Term ecosystem first coined by a. g. tansley to refer to all components of an ecological system. Refers to energy derived from fixation of carbon during photosynthesis and chemosynthesis. Represents important energy transition for light energy from sun into chemical energy that can be used by autotrophs and consumed by heterotrophs. Gross primary production (gpp): amount of carbon fixed by autotrophs in ecosystem. In terrestrial ecosystems i equivalent to total of all plant photosynthesis. Gpp controlled by rate of photosynthesis and leaf area index (leaf are of plants per unit of ground area)
