Sheelar (Clay County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 29°50'24", Longitude 81°57'31"
Period of record: 54 sampling dates; November 15, 1991 to April 24, 1999
Surface area (Shafer et al. 1986): 18 acres / 7 hectacres
Lake Region (Griffith et al. 1997): Trail Ridge
Geologic formation (Brooks 1981):
The geology is dominated by quartz sand and quartzite gravel with sandy clay beds of the Hawthorne Formation.
Physiographic region (Brooks 1981):
The water body lies in the Interlachen Sand Hills division of the Central Lake District.
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 54 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
2 |
4 |
16 |
|
Long-term total nitrogen concentrations (µg/L) |
30 |
90 |
210 |
|
Long-term total chlorophyll concentrations (µg/L) |
0.7 |
1.6 |
5.0 |
|
Long-term Secchi depth (ft) |
18.0 |
24.9 |
38.7 |
1999 Florida LAKEWATCH Data
Numbers reported below are monthly averages calculated from 3 stations for total phosphorus (TP, µg/L), total nitrogen (TN, µg/L), chlorophyll (CHL, µg/L) and Secchi depth (SECCHI, ft) during 1999:
|
Date |
TP (µg/L) |
TN (µg/L) |
CHL (µg/L) |
SECCHI (ft |
|
Apr-24-99 |
4 |
70 |
1.0 |
25.3 |
|
|
|
|
|
|
|
1999 Average |
4 |
70 |
1.0 |
25.3 |
Sheelar (Clay County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on July 15, 1997
|
Percent area covered with aquatic vegetation (PAC, %) |
10 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
2 |
|
Average emergent plant biomass (kg wet wt/m2) |
1.4 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
0.0 |
|
Average submersed plant biomass (kg wet wt/m2) |
0.0 |
|
Average width of emergent and floating-leaved zone (ft.) |
24 |
|
Average lake depth (m) |
10 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
St. John's wort |
Hypericum spp. |
100 |
|
red ludwigia |
Ludwigia repens |
100 |
|
maidencane |
Panicum hemitomon |
100 |
|
southern cutgrass |
Leersia hexandra |
100 |
|
respuinata bladderwort |
Utricularia resupinata |
100 |
|
rush fuirena |
Fuirena scirpoidea |
70 |
|
yellow-eyed grass |
Xyris spp. |
70 |
|
leconte sedge |
Cyperus lecontei |
50 |
|
buttonbush |
Cephalanthus occidentalis |
10 |
|
rush family |
Juncaceae |
10 |
|
hatpin |
Eriocaulon decangulare |
10 |