North (Marion County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 29°10'3", Longitude 81°52'47"

Period of record: 96 sampling dates; April 18, 1990 to May 22, 1999

Surface area (LAKEWATCH): 223 acres / 90 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 Lynne Karst 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Supplemental, unpublished water chemistry data, University of Florida.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
6.6
 Sulfate (mg/L)
4.7
Total alkalinity (mg/L as CaCO3)
4.4
 Calcium (mg/L)
3.0
Conductance (µS/cm @ 25 °C)
70
 Magnesium (mg/L)
2.0
Color (Pt-Co units)
19
 Sodium (mg/L)
7.0
Chloride (mg/L)
14.2
 Potassium (mg/L)
1.0
Silicon (mg/L)
0.9
    

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 96 months sampled:

 
Minimum
Average
Maximum
Long-term total phosphorus concentrations (µg/L)
12
20
37
Long-term total nitrogen concentrations (µg/L)
480
620
920
Long-term total chlorophyll concentrations (µg/L)
2.0
6.4
36.3
Long-term Secchi depth (ft)
3.0
5.8
10.0

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
Jan-28-99
17
570
4.7
6.3
May-22-99
23
680
3.0
10.0
         
1999 Average
20
630
3.8
8.2

 

North (Marion County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 16, 1992

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)
3.8
Average floating-leaved plant biomass (kg wet wt/m2)
11.1
Average submersed plant biomass (kg wet wt/m2)
0.0
Average width of emergent and floating-leaved zone (ft.)
31
Average lake depth (m)
3

 

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

Common Name Plant Species
Frequency (%)
duck-potato Sagittaria lancifolia
100
sawgrass Cladium jamaicense
100
maidencane Panicum hemitomon
90
floating water-hyacinth Eichhornia crassipes
80
spatterdock Nuphar luteum
80
common salvinia Salvinia rotundifolia
50
water-pennywort Hydrocotyle umbellata
50
buttonbush Cephalanthus occidentalis
40
banana-lily Nymphoides aquatica
30
pickerelweed Pontederia cordata
30
red ludwigia Ludwigia repens
20
slender spikerush Eleocharis baldwinii
10
smartweed Polygonum hydropiperoides
10
salt-bush Baccharis spp.
10
water primrose Ludwigia octovalvis
10
flat-sedge Cyperus odoratus
10
torpedograss Panicum repens
10

 

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on July 21, 1998

Percent area covered with aquatic vegetation (PAC, %)
8
Percent of lake's volume filled with vegetation (PVI, %)
1
Average emergent plant biomass (kg wet wt/m2)
4.7
Average floating-leaved plant biomass (kg wet wt/m2)
6.1
Average submersed plant biomass (kg wet wt/m2)
0.0
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 (%)
duck-potato Sagittaria lancifolia
100
sawgrass Cladium jamaicense
100
wax myrtle Myrica cerifera
90
lizard's-tail Saururus cernuus
80
floating water-hyacinth Eichhornia crassipes
70
spatterdock Nuphar luteum
70
maidencane Panicum hemitomon
70
red maple Acer rubrum
60
buttonbush Cephalanthus occidentalis
40
pickerelweed Pontederia cordata
30
water primrose Ludwigia octovalvis
30
willow Salix spp.
20
common salvinia Salvinia rotundifolia
10
alligator-weed Alternanthera philoxeroides
10
banana-lily Nymphoides aquatica
10
red ludwigia Ludwigia repens
10
elephant-ear Colocasia esculenta
10
torpedograss Panicum repens
10

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