Lake E6
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Manipulation
Monitoring of lake E6 started in 1999. In the year 2001 a nutrient enrichment experiment began to mimic the effects of increased nutrient availability caused by regional warming and a subsequent increase in the thaw depth of the surrounding watershed. The annual loading of both nitrogen and phosphorus were increased four fold using NH4NO3 and H3PO4 to a final annual loading of 4.0mmol N/m3 and 0.25mmol P/m3. Fertilization has continued every year since and will continue through summer 2005.
Lake Description
Lake E6 is kettle lake located on the North Slope of Alaska (68.38oN, 149.37oE)
Elevation (m): 782
Surface Area (ha): 2.0
Volume (cubic meters): 34,819
Mean Depth (m): 2
Max Depth (m): 3.2
Catchment Area (ha): NA
Water Retention Time (years): NA
Fish
Lake E6 is fishless
Microplankton
Keratella cochlearis
Keratella quadrata
Kellicottia longispina
Polyarthra vulgaris
Chromogaster ecaudis
Conochilus unicornis
Synchaeta sp.
Filinia longiseta
Zooplankton
Heterocope septentrionalis
Holopedium gibberum
Bosmina longirostris
Diaptomus pribilofensis
Cyclops scutifer
Daphnia middendorffiana
Daphnia longiremis
