http://library.thinkquest.org/11353/ecosystems.htm  (this one tells the difference between a biome and an ecosystem and goes through some individual biomes)

http://www.mbgnet.net/  (this one gives examples of biomes and what they have in them)

http://lsb.syr.edu/projects/cyberzoo/biome.html  (this also tells in detail about different biomes)

http://www.cdli.ca/CITE/ecosystems.htm (this also tells in detail about different biomes)

http://www.nceas.ucsb.edu/nceas-web/kids/biomes/list_biomes.htm (this also tells in detail about different biomes)

http://www.enchantedlearning.com/biomes/  (this also tells in detail about different biomes)

http://www.cofed.ecu.edu/csmte/Grade5_Science_VBS/research.htm                                                 

http://www.gould.edu.au/foodwebs/kids_web.htm  (Information on food chains)

http://earthobservatory.nasa.gov/Laboratory/Biome/bioconiferous.html (Includes graphs and statistics for each biome)

http://curriculum.calstatela.edu/courses/builders/lessons/less/biomes/introbiomes.html(Includes information on food chains for each biome)

http://www.worldbiomes.com/biomes_aquatic.htm (This website has freshwater and marine life biome information)

To search for more information, you can use this website.  It is a search engine like Yahoo or Google.
http://go-passport.grolier.com/

To create a reference for your bibliography, you can try using these links...
http://citationcenter.net/ctool.php5?style=MLA

http://www.citationmachine.net/index.php?reqstyleid=1