Deerback (Marion County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 29°29'6", Longitude 81°58'0"
Period of record: 134 sampling dates; October 28, 1988 to December 23, 1999
Surface area (Shafer et al. 1986): 73 acres / 30 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Supplemental, unpublished water chemistry data, University of Florida.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 |
5.8 |
Sulfate (mg/L) |
9.0 |
|
Total alkalinity (mg/L as CaCO3) |
0.7 |
Calcium (mg/L) |
3.0 |
|
Conductance (µS/cm @ 25 °C) |
84 |
Magnesium (mg/L) |
2.0 |
|
Color (Pt-Co units) |
14 |
Sodium (mg/L) |
7.5 |
|
Chloride (mg/L) |
14.7 |
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 134 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
4 |
11 |
23 |
|
Long-term total nitrogen concentrations (µg/L) |
450 |
650 |
960 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.0 |
4.8 |
16.7 |
|
Long-term Secchi depth (ft) |
4.2 |
8.8 |
16.8 |
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-31-99 |
11 |
770 |
3.0 |
5.0 |
|
Feb-28-99 |
13 |
800 |
3.3 |
5.0 |
|
Mar-31-99 |
17 |
800 |
6.7 |
4.2 |
|
Apr-26-99 |
16 |
700 |
5.3 |
5.0 |
|
May-03-99 |
15 |
690 |
6.7 |
4.3 |
|
Jun-14-99 |
12 |
550 |
5.0 |
5.7 |
|
Jul-11-99 |
8 |
630 |
4.3 |
7.7 |
|
Aug-14-99 |
10 |
570 |
4.0 |
8.1 |
|
Sep-25-99 |
10 |
540 |
12.3 |
6.3 |
|
Oct-30-99 |
10 |
500 |
5.0 |
8.0 |
|
Nov-23-99 |
12 |
540 |
3.0 |
9.2 |
|
Dec-23-99 |
9 |
500 |
3.0 |
7.7 |
|
|
|
|
|
|
|
1999 Average |
12 |
630 |
5.1 |
6.3 |
Deerback (Marion County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on May 7, 1992
|
Percent area covered with aquatic vegetation (PAC, %) |
0 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
0 |
|
Average emergent plant biomass (kg wet wt/m2) |
4.0 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
2.1 |
|
Average submersed plant biomass (kg wet wt/m2) |
0.7 |
|
Average width of emergent and floating-leaved zone (ft.) |
33 |
|
Average lake depth (m) |
2 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
slender spikerush |
Eleocharis baldwinii |
90 |
|
banana-lily |
Nymphoides aquatica |
90 |
|
fragrant water-lily |
Nymphaea odorata |
90 |
|
pickerelweed |
Pontederia cordata |
90 |
|
maidencane |
Panicum hemitomon |
80 |
|
rush fuirena |
Fuirena scirpoidea |
80 |
|
Florida bladderwort |
Utricularia floridana |
80 |
|
pipewort |
Eriocaulon spp. |
80 |
|
St. John's wort |
Hypericum spp. |
50 |
|
spatterdock |
Nuphar luteum |
40 |
|
water-pennywort |
Hydrocotyle umbellata |
40 |
|
bog-moss |
Mayaca fluviatilis |
30 |
|
cat-tail |
Typha spp. |
20 |
|
purple bladderwort |
Utricularia purpurea |
20 |
|
lemon bacopa |
Bacopa caroliniana |
10 |
|
buttonbush |
Cephalanthus occidentalis |
10 |
|
respuinata bladderwort |
Utricularia resupinata |
10 |