Kerr (Marion County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 29°21'4", Longitude 81°46'52"
Period of record: 6 sampling dates; April 18, 1990 to October 20, 1990
Surface area : No data available.
Lake Region (Griffith et al. 1997): Ocala Scrub
Geologic formation (Brooks 1981):
The geology is dominated by sand dunes and well sorted fine sand of the Pleistocene.
Physiographic region (Brooks 1981):
The water body lies in the Ocala Scrub division of the Central Lake District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 4 months sampled:
|
pH |
6.1 |
Sulfate (mg/L) |
23.0 |
|
Total alkalinity (mg/L as CaCO3) |
2.1 |
Calcium (mg/L) |
8.2 |
|
Conductance (µS/cm @ 25 °C) |
133 |
Magnesium (mg/L) |
5.9 |
|
Color (Pt-Co units) |
13 |
Sodium (mg/L) |
12.3 |
|
Chloride (mg/L) |
21.7 |
Potassium (mg/L) |
0.8 |
|
Silicon (mg/L) |
0.7 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 6 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
7 |
9 |
12 |
|
Long-term total nitrogen concentrations (µg/L) |
220 |
340 |
430 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.0 |
1.7 |
3.0 |
|
Long-term Secchi depth (ft) |
6.3 |
6.9 |
7.5 |
Florida LAKEWATCH data were not collected in 1999.
Kerr (Marion County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on August 3, 1994
|
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) |
1.3 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
0.8 |
|
Average submersed plant biomass (kg wet wt/m2) |
3.1 |
|
Average width of emergent and floating-leaved zone (ft.) |
37 |
|
Average lake depth (m) |
2 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
wax myrtle |
Myrica cerifera |
100 |
|
giant bulrush |
Scirpus californicus |
100 |
|
water-pennywort |
Hydrocotyle umbellata |
90 |
|
lemon bacopa |
Bacopa caroliniana |
80 |
|
tapegrass |
Vallisneria americana |
60 |
|
cat-tail |
Typha spp. |
50 |
|
torpedograss |
Panicum repens |
50 |
|
red root |
Lachnanthes caroliniana |
50 |
|
yellow-eyed grass |
Xyris spp. |
50 |
|
slender spikerush |
Eleocharis baldwinii |
40 |
|
spatterdock |
Nuphar luteum |
40 |
|
willow |
Salix spp. |
40 |
|
maidencane |
Panicum hemitomon |
40 |
|
duck-potato |
Sagittaria lancifolia |
30 |
|
pickerelweed |
Pontederia cordata |
30 |
|
salt-bush |
Baccharis spp. |
30 |
|
water primrose |
Ludwigia octovalvis |
30 |
|
rush fuirena |
Fuirena scirpoidea |
30 |
|
floating water-hyacinth |
Eichhornia crassipes |
20 |
|
common salvinia |
Salvinia rotundifolia |
20 |
|
banana-lily |
Nymphoides aquatica |
20 |
|
frog's-bit |
Limnobium spongia |
10 |
|
fragrant water-lily |
Nymphaea odorata |
10 |
|
Baldwin flat sedge |
Cyperus globulosus |
10 |