1. An improper nitrogen cycle , inappropriate stresses on ornamental fish in a tank. 2. Nitrification could potentially become a " bottleneck " in the nitrogen cycle . 3. Enceladus has an active hydrological, silicate and possibly a nitrogen cycle . 4. Epiphytic bacteria found in the marine environment have a role in the nitrogen cycle . 5. The carbon and nitrogen cycles of ecosystems will be curtailed and soil stability endangered. 6. Nitrogen fixation is an important part of the nitrogen cycle . 7. The effects of such an occurrence would reverberate throughout the food web, and nitrogen cycle . 8. The nitrogen cycle refers to the conversion of toxic ammonia to nitrite and finally nitrate. 9. Like all Tanganyikans, " L . ocellatus " are quite sensitive to the nitrogen cycle . 10. The biochemistry is better explained in this book : " Biology of the nitrogen cycle "
