- recapped Ch1
- took a quick quiz on Ch1
- touched into Ch2 (trophic levels and terms)
- intro'd BLOG
Thoughts / Questions
Our discussion made me wonder about the biodome project (why didn't it work?), how many organisms can exist in a given food chain (max # of trophic levels?), and just how thick is the biosphere (other than "saran wrap"). It's hard to believe that this small region is the only place that life exists in the universe.
Above / Beyond
According to this site: www.en.wikipedia.org/wiki/biosphere the average thickness of the biosphere is about 5400m above sea level to 9000m below sea level. That's 14.4km - not very thick (like driving to hwy 22!). Note: some organisms have been recorded outside of this range - at least temporarily e.g. Ruppels vulture found at 11,300m! and some fish found at -8372m! Most organisms at the extremes of the biosphere are single-celled bacteria.
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