1. Ph.D. Candidate, Water and Environmental Research Center, Univ. of Alaska Fairbanks, Box 755960, Fairbanks, AK 99775.
2. Director, Water and Environmental Research Center, Univ. of Alaska Fairbanks, Box 755960, Fairbanks, AK 99775 (corresponding author).
3. Professor, Dept. of Biological Science, Univ. of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508.