Star (Putnam County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 29°31'33", Longitude 82°2'15"

Period of record: 116 sampling dates; February 17, 1989 to December 11, 1999

Surface area (LAKEWATCH): 287 acres / 116 hectacres     Bathymetric Map

Lake Region (Griffith et al. 1997): Central Valley

Geologic formation (Brooks 1981):

The geology is dominated by deeply weathered clayey sand and granular sand 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Supplemental, unpublished water chemistry data, University of Florida.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
5.7
 Sulfate (mg/L)
5.0
Total alkalinity (mg/L as CaCO3)
0.5
 Calcium (mg/L)
1.0
Conductance (µS/cm @ 25 °C)
48
 Magnesium (mg/L)
1.0
Color (Pt-Co units)
25
 Sodium (mg/L)
5.0
Chloride (mg/L)
9.5
 Potassium (mg/L)
0.0
Silicon (mg/L)
1.6
    

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 116 months sampled:

 
Minimum
Average
Maximum
Long-term total phosphorus concentrations (µg/L)
12
24
40
Long-term total nitrogen concentrations (µg/L)
190
360
620
Long-term total chlorophyll concentrations (µg/L)
1.3
7.2
30.0
Long-term Secchi depth (ft)
1.4
4.6
8.2

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
Jan-17-99
25
330
5.3
3.8
Mar-22-99
25
390
5.0
3.0
Apr-18-99
23
370
8.3
2.5
May-31-99
28
440
8.7
2.9
Jun-21-99
37
370
11.0
2.7
Jul-11-99
27
320
7.3
4.3
Aug-16-99
40
420
9.3
4.6
Sep-29-99
29
330
5.3
6.4
Oct-24-99
31
310
4.0
4.9
Nov-28-99
22
340
4.0
5.7
Dec-11-99
23
370
3.0
5.9
         
1999 Average
28
360
6.5
4.3

 

Star (Putnam County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on July 23, 1991

Percent area covered with aquatic vegetation (PAC, %)
4
Percent of lake's volume filled with vegetation (PVI, %)
1
Average emergent plant biomass (kg wet wt/m2)
1.8
Average floating-leaved plant biomass (kg wet wt/m2)
16.4
Average submersed plant biomass (kg wet wt/m2)
0.2
Average width of emergent and floating-leaved zone (ft.)
38
Average lake depth (m)
3

 

Frequency that plant species occur in 10 evenly spaced transects around the lake.

Common Name Plant Species
Frequency (%)
maidencane Panicum hemitomon
90
floating water-hyacinth Eichhornia crassipes
80
slender spikerush Eleocharis baldwinii
50
sawgrass Cladium jamaicense
50
pickerelweed Pontederia cordata
30
spatterdock Nuphar luteum
20
dwarf arrowhead Sagittaria subulata
20
water-pennywort Hydrocotyle umbellata
10
purple bladderwort Utricularia purpurea
10
elephant-ear Colocasia esculenta
10
water primrose Ludwigia octovalvis
10

 

Star (Putnam County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 18, 1998

Percent area covered with aquatic vegetation (PAC, %)
12
Percent of lake's volume filled with vegetation (PVI, %)
3
Average emergent plant biomass (kg wet wt/m2)
6.7
Average floating-leaved plant biomass (kg wet wt/m2)
10.7
Average submersed plant biomass (kg wet wt/m2)
0.5
Average width of emergent and floating-leaved zone (ft.)
16
Average lake depth (m)
3

 

Frequency that plant species occur in 10 evenly spaced transects around the lake.

Common Name Plant Species
Frequency (%)
slender spikerush Eleocharis baldwinii
90
elephant-ear Colocasia esculenta
80
maidencane Panicum hemitomon
80
floating water-hyacinth Eichhornia crassipes
70
wax myrtle Myrica cerifera
70
water primrose Ludwigia octovalvis
70
sawgrass Cladium jamaicense
70
pickerelweed Pontederia cordata
60
water-pennywort Hydrocotyle umbellata
60
torpedograss Panicum repens
50
alligator-weed Alternanthera philoxeroides
30
frog's-bit Limnobium spongia
20
water-moss Fontinalis spp.
20
buttonbush Cephalanthus occidentalis
20
bur marigold Bidens mitis
20
spatterdock Nuphar luteum
10
dwarf arrowhead Sagittaria subulata
10
coontail Ceratophyllum demersum
10
southern naiad Najas guadalupensis
10
variableleaf pondweed Potamogeton diversifolius
10
para grass Brachiaria mutica
10
southern cutgrass Leersia hexandra
10
umbrella sedge Cyperus alternifolius
10
rush spp. Juncus acuminatus
10
sweetbay Magnolia virginiana
10

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