LTER network Toolik Field Station MBLhome page

Weather at Toolik

Toolik Weather Graphs

Arctic LTER Weather Stations

Toolik Webcam

Animated Gif of yesterday's Webcam

Arctic LTER Inhouse login

Lake E5

(insert picture)

Bathymetric Map


Monitoring began on lake E5 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 and will continue through summer 2005.

Lake Description

Lake E5 is kettle lake located on the North Slope of Alaska (68.38oN, 149.37oE)

Elevation (m): 798

Surface Area (ha): 11.3

Volume (cubic meters): 703,376

Mean Depth (m): 5.2

Max Depth (m): 12.7

Catchment Area (ha): NA

Water Retention Time (years): NA


Arctic Grayling (Thymallus arcticus)

Slimy sculpin (Cottus cognatus)

Arctic Char (Salvelinus alpinus)


Keratella cochlearis

Keratella quadrata

Kellicottia longispina

Polyarthra vulgaris

Chromogaster ecaudis

Conochilus unicornis

Synchaeta sp.

Filinia longiseta


Heterocope septentrionalis

Holopedium gibberum

Bosmina longirostris

Diaptomus pribilofensis

Cyclops scutifer

Please contact with questions, comments, or for technical assistance regarding this web site.