OCR Text |
Show Table 9. Study design for proposed primary and secondary productivity studies for Lake Powell. Sampling frequency: Study to last 15 months and consist of nine sampling trips including: Year 2 Year 2 June July August November January March June July August Halls Crossing Hite Zahn Bay ( San Juan Arm) Stations: Warm Creek Bay Padre Bay Escalante River Arm Physical parameters: Profile of water temperature, pH, specific conductance, dissolved oxygen, and photo- synthetically available radiation. Nutrients: Two samples will be taken at each site. One will be an integrated sample from 0- 2.5 m, the second an integrated sample from 1- 5 m. Nutrient determination will include: dissolved species total ( unfiltered) NH.- N total nitrogen NOp and NO-- N total phosphorus Si soluble reactive phosphate 14 Phytoplankton: Chlorophyll a biomass and C primary productivity determined at surface, 1 m, 3 m, 5 m, 7 m, 10 m, 15 m, 20 m, and 25 m at shallow stations; and at surface, 1 m, 3m, 7m, 10m, 25 m, and 70 m at deep stations. Zooplankton: Zooplankton identification and enumeration from integrated plankton tows at depths determined appropriate by the Utah Division of Wildlife Resources. 74 |