Fishing is an important industry in Alaska. What are the specific impacts that global warming have on the nitrogen levels in the sea? And how significantly lower are the fish populations and how does it affect other species in the area? Also what are the specific techniques you will you use to measure the biological use of nitrogen? Also what are the major differences with the nitrogen levels between the two poles? And what are your thoughts for what can be done about the raising nitrogen levels in the Artic area? Thank you,Christina N.