Fanny (Putnam County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 29°33'35", Longitude 81°59'5"
Period of record: 86 sampling dates; March 28, 1990 to May 16, 1999
Surface area (Shafer et al. 1986): 100 acres / 40 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. John’s 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Supplemental, unpublished water chemistry data, University of Florida.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 |
4.6 |
Sulfate (mg/L) |
11.2 |
|
Total alkalinity (mg/L as CaCO3) |
0.0 |
Calcium (mg/L) |
2.0 |
|
Conductance (µS/cm @ 25 °C) |
78 |
Magnesium (mg/L) |
1.0 |
|
Color (Pt-Co units) |
5 |
Sodium (mg/L) |
7.5 |
|
Chloride (mg/L) |
12.5 |
Potassium (mg/L) |
1.0 |
|
Silicon (mg/L) |
0.2 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 86 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
2 |
5 |
11 |
|
Long-term total nitrogen concentrations (µg/L) |
40 |
130 |
280 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.0 |
2.7 |
9.0 |
|
Long-term Secchi depth (ft) |
5.1 |
10.4 |
17.0 |
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 |
|
Mar-17-99 |
7 |
210 |
2.0 |
17.0 |
|
Apr-16-99 |
11 |
270 |
3.0 |
. |
|
May-16-99 |
7 |
210 |
2.0 |
12.0 |
|
|
|
|
|
|
|
1999 Average |
8 |
230 |
2.3 |
14.5 |
Fanny (Putnam County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on July 9, 1991
|
Percent area covered with aquatic vegetation (PAC, %) |
44 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
7 |
|
Average emergent plant biomass (kg wet wt/m2) |
2.3 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
3.5 |
|
Average submersed plant biomass (kg wet wt/m2) |
1.2 |
|
Average width of emergent and floating-leaved zone (ft.) |
40 |
|
Average lake depth (m) |
3 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
spatterdock |
Nuphar luteum |
100 |
|
maidencane |
Panicum hemitomon |
100 |
|
slender spikerush |
Eleocharis baldwinii |
90 |
|
Florida bladderwort |
Utricularia floridana |
70 |
|
banana-lily |
Nymphoides aquatica |
50 |
|
water-pennywort |
Hydrocotyle umbellata |
10 |
|
water-moss |
Fontinalis spp. |
10 |
|
green algae |
Chlorphyta |
10 |
Fanny (Putnam County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on July 16, 1997
|
Percent area covered with aquatic vegetation (PAC, %) |
98 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
49 |
|
Average emergent plant biomass (kg wet wt/m2) |
7.0 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
2.5 |
|
Average submersed plant biomass (kg wet wt/m2) |
3.7 |
|
Average width of emergent and floating-leaved zone (ft.) |
40 |
|
Average lake depth (m) |
3 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
banana-lily |
Nymphoides aquatica |
100 |
|
variable-leaf milfoil |
Myriophyllum heterophyllum |
100 |
|
purple bladderwort |
Utricularia purpurea |
100 |
|
maidencane |
Panicum hemitomon |
100 |
|
St. John's wort |
Hypericum spp. |
100 |
|
pickerelweed |
Pontederia cordata |
90 |
|
spatterdock |
Nuphar luteum |
80 |
|
sawgrass |
Cladium jamaicense |
80 |
|
southern cutgrass |
Leersia hexandra |
70 |
|
water-pennywort |
Hydrocotyle umbellata |
50 |
|
rush fuirena |
Fuirena scirpoidea |
50 |
|
red ludwigia |
Ludwigia repens |
40 |
|
bog-moss |
Mayaca fluviatilis |
40 |
|
smartweed |
Polygonum hydropiperoides |
20 |
|
dwarf arrowhead |
Sagittaria subulata |
20 |
|
buttonbush |
Cephalanthus occidentalis |
20 |
|
slender spikerush |
Eleocharis baldwinii |
10 |
|
fragrant water-lily |
Nymphaea odorata |
10 |
|
water-moss |
Fontinalis spp. |
10 |
|
water primrose |
Ludwigia octovalvis |
10 |
|
torpedograss |
Panicum repens |
10 |
|
Florida bladderwort |
Utricularia floridana |
10 |