1. Dep. of Soil Science and Watershed Systems Research Program; Univ. of Manitoba; 13 Freedman Crescent Winnipeg MB R3T 2N2 Canada
2. Environmental Science Program and Quesnel River Research Centre; Univ. of Northern British Columbia; 3333 University Way Prince George BC V2N 4Z9 Canada
3. Centre de Recherche Publique- Gabriel Lippmann, Dep. of Environment and Agro-Biotechnologies; 41 rue du Brill L-4422 Belvaux Luxembourg
4. Natural Resources and Environmental Studies Program; Univ. of Northern British Columbia; 3333 University Way Prince George BC V2N 4Z9 Canada
5. Geography Program and Quesnel River Research Centre; University of Northern British Columbia; 3333 University Way Prince George BC V2N 4Z9 Canada
6. Centre for Earth Observation Science, Dep. of Environment and Geography, 482 Wallace Bldg.; Univ. of Manitoba; Winnipeg Canada R3T 2N2