BIOL 2Q04 Lecture Notes - Lecture 21: Primary Production, Ecosystem Model, Herbivore
2 Dec 2015
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Document Summary
We went from: individuals, populations, communities, landscape and ecosystems environment. All the living organisms that live in an area and the nonliving features of their. Tansley (1935): biological and physical components of the environment. Instead of species by species: looking at the global system where you have autotrophs and heterotrophs. Once we have the food web we can look at metabolism. Biomass: use weight as a metric of importance forming a single interactive system. Flow of chemical materials: ecosystem = super organism, taking in energy, processing it and passing it out. Flow of energy: ecosystem is an energy transformer: solar energy -> photosynthesis -> herbivores -> carnivores o. Cornerstone of all life- earth"s living mantle is made up of green plants (99. 9% by weight) = glucose produced by photosynthesis - glucose used for cellular functions = glucose available for new material i. e. biomass (gross primary production) - (respiration) = (net primary production) Highest in tropics and decreases toward the poles.
