21_light_photosynthesis_respiration

21_light_photosynthesis_respiration - Light,...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Light, photosynthesis, and respiration GS222 Lecture 21 Overview - this lecture Photosynthesis creation of organic matter Respiration consumption of organic matter Light and its component wavelengths Limiting nutrients Organic compounds Organic compounds created by combining carbon (C) atoms into chains or rings Properties of organic molecules determined by: 1) number and arrangement of C atoms 2) number and position of elements in other groups of atoms attached to C chains or rings (O, H, N , S, P ) Metabolism is the set of reactions that all organisms use to maintain life Photosynthesis Primary production: process of converting inorganic compounds to organic matter Creation or organic compounds requires energy! Photosynthesis: dominant form of primary production in the ocean and on land Requires : water, CO 2 , nutrients, energy CO 2 + H 2 O CH 2 O + O 2 6CO 2 + 6H 2 O C 6 H 12 O 6 + 6O 2 glucose Photosynthesis In the ocean, water is abundant and does NOT limit photosynthesis. Carbon dioxide is also abundant, and therefore NOT a limiting factor. Solar radiation is the primary energy source, light availability determines where and when photosynthesis occurs. Nutrient availability is often a limiting factor (N, P, Fe) chlorophyll Autotrophs & heterotrophs There are 2 primary types of organisms: 1) autotrophs create their own food using external energy source through primary production (plants, algae, some bacteria) 2) heterotrophs unable to make organic compounds from inorganic compounds, need...
View Full Document

This note was uploaded on 01/20/2012 for the course GEO 222 taught by Professor Davidlund during the Winter '11 term at University of Michigan.

Page1 / 27

21_light_photosynthesis_respiration - Light,...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online