Appendix B. List of environmental variables examined as controls of algal synchrony. All environmental data from Hall et al. (1999a).
Type of variable |
Variable name (units) |
Year span |
Climate |
Spring evaporation at Regina (mm) |
19101994 |
Fall evaporation at Regina (mm) |
19101994 |
|
Summer evaporation at Regina (mm) |
19101994 |
|
Spring precipitation at Indian Head (mm) |
19101994 |
|
Summer precipitation at Indian Head (mm) |
19101994 |
|
Fall precipitation at Indian Head (mm) |
19101994 |
|
Winter precipitation at Indian Head (mm) |
19101994 |
|
Mean monthly maximum air T during spring at Indian Head (°C) |
18901994 |
|
Mean monthly maximum air T during summer at Indian Head (°C) |
18901994 |
|
Mean monthly maximum air T during fall at Indian Head (°C) |
18901994 |
|
Mean monthly maximum air T during winter at Indian Head (°C) |
18901994 |
|
Mean monthly minimum air T during spring at Indian Head (°C) |
18901994 |
|
Mean monthly minimum air T during summer at Indian Head (°C) |
18901994 |
|
Mean monthly minimum air T during fall at Indian Head (°C) |
18901994 |
|
Mean monthly minimum air T during winter at Indian Head (°C) |
18901994 |
|
Ice break-up date of the Red River at Winnipeg (day of year) |
18701994 |
|
Ice-free season of the Red River at Winniped (days) |
18701994 |
|
Qu’Appelle River flow at Lumsden (log base 10 of ML) |
19101994 |
|
Qu’Appelle River flow at Welby (log base 10 of ML) |
19101994 |
|
El Niño Southern Oscillation index |
18701994 |
|
Pacific Decadal Oscillation |
19001994 |
|
Northern Atlantic Oscillation |
18601994 |
|
Resource Use |
Annual commercial fish harvest in Qu’Appelle Valley lakes |
19201994 |
Qu’Appelle Valley cattle population |
19201994 |
|
Qu’Appelle Valley livestock biomass (kg) |
19201994 |
|
Qu’Appelle Valley area of land in farms (ha) |
19201994 |
|
Urbanization |
Regina human population |
19001994 |
LITERATURE CITED
Hall, R. I., P. R. Leavitt, R. Quinlan, A. S. Dixit, and J. P. Smol. 1999. Effects of agriculture, urbanization, and climate on water quality in the northern Great Plains. Limnology and Oceanography 44 (3, part 2):739756.