1. Environmental Microbiology Alex Sivan

3. sediments Deep water

4. Not much difference in bacterial population between extreme environments

9. Cellular productivity is different in various habitats. The overall production depends on population size and generation time

10. Total number of prokaryots: 4-6 x 10 30 Amount of cellular prokaryotic C: 350-550Pg (1Pg = 10 15 g) 60 – 100% of C in plants N: 85 – 130Pg P: 9 – 14Pg 10 folds more N+ P compared to plants