chapter+13+resources

chapter 13.1 ecologists study relationships
http://www.nature.com/scitable/knowledge/library/ecologists-study-the-interactions-of-organisms-and-13235586

on this web site it talks a little about some so stuff in chapter 14 as well information found on 10-26-11

chapter 13.2 biotic and abiotic factors
http://www.biology-online.org/6/3_abiotic_factors.htm

this website give the definitions of the words and a few examples. information found on 10-26-11

chapter13.3 energy in the ecosystems
http://www4.uwsp.edu/cnr/wcee/keep/Mod1/Flow/foodchains.htm

also talks about things in chapter 13.4. information found on 10-26-11

chapter 13.4 food web and food chains
http://www4.uwsp.edu/cnr/wcee/keep/Mod1/Flow/foodchains.htm

found on 10-26-11

chapter 13.5 cycling of matter
http://recalde.tripod.com/lec9.html

found on 10-26-11

chapter 13.6 pyramid models
http://www.biocab.org/Energy_Pyramid.html http://www.buzzle.com/articles/biomass-pyramid-vs-energy-pyramid.html

found on 10-26-11