Pegram (Marion County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 29°28'13", Longitude 81°59'12"
Period of record: 65 sampling dates; November 2, 1988 to April 16, 1994
Surface area (Shafer et al. 1986): 62 acres / 25 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 St. JohnÕs Offset division of the Central Lake District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 2 months sampled:
|
pH |
6.3 |
Sulfate (mg/L) |
5.7 |
|
Total alkalinity (mg/L as CaCO3) |
2.6 |
Calcium (mg/L) |
2.0 |
|
Conductance (µS/cm @ 25 °C) |
73 |
Magnesium (mg/L) |
1.0 |
|
Color (Pt-Co units) |
14 |
Sodium (mg/L) |
8.5 |
|
Chloride (mg/L) |
15.7 |
Potassium (mg/L) |
1.0 |
|
Silicon (mg/L) |
0.3 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 65 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
4 |
9 |
16 |
|
Long-term total nitrogen concentrations (µg/L) |
490 |
740 |
990 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.0 |
5.8 |
69.0 |
|
Long-term Secchi depth (ft) |
1.5 |
9.2 |
15.0 |
Florida LAKEWATCH data were not collected in 1999.
Pegram (Marion County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on May 6, 1992
|
Percent area covered with aquatic vegetation (PAC, %) |
58 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
15 |
|
Average emergent plant biomass (kg wet wt/m2) |
1.8 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
1.1 |
|
Average submersed plant biomass (kg wet wt/m2) |
1.6 |
|
Average width of emergent and floating-leaved zone (ft.) |
16 |
|
Average lake depth (m) |
2 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
Florida bladderwort |
Utricularia floridana |
90 |
|
variable-leaf milfoil |
Myriophyllum heterophyllum |
80 |
|
respuinata bladderwort |
Utricularia resupinata |
80 |
|
rush fuirena |
Fuirena scirpoidea |
70 |
|
slender spikerush |
Eleocharis baldwinii |
60 |
|
fragrant water-lily |
Nymphaea odorata |
50 |
|
water-pennywort |
Hydrocotyle umbellata |
40 |
|
maidencane |
Panicum hemitomon |
40 |
|
pickerelweed |
Pontederia cordata |
30 |
|
bacopa |
Bacopa monnieri |
30 |
|
purple bladderwort |
Utricularia purpurea |
30 |
|
torpedograss |
Panicum repens |
30 |
|
spatterdock |
Nuphar luteum |
20 |
|
variableleaf pondweed |
Potamogeton diversifolius |
20 |
|
pipewort |
Eriocaulon spp. |
20 |
|
banana-lily |
Nymphoides aquatica |
10 |
|
red ludwigia |
Ludwigia repens |
10 |
|
cat-tail |
Typha spp. |
10 |
|
bog-moss |
Mayaca fluviatilis |
10 |
|
St. John's wort |
Hypericum spp. |
10 |
|
water spikerush |
Eleocharis elongata |
10 |