Pierce (Polk County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 27°58'29", Longitude 81°31'17"
Period of record: 39 sampling dates; April 5, 1990 to July 15, 1999
Surface area : No data available.
Lake Region (Griffith et al. 1997): Lake Wales Ridge Transition
Geologic formation (Brooks 1981):
The geology is dominated by deeply weathered beach and dune sand with some clay lenses of the preglacial Pleistocene.
Physiographic region (Brooks 1981):
The water body lies in the Eastern Complex of the Central Ridge subdivision of the Lake Wales Ridge division of the Central Lake District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 5 months sampled:
|
pH |
8.1 |
Sulfate (mg/L) |
11.6 |
|
Total alkalinity (mg/L as CaCO3) |
36.8 |
Calcium (mg/L) |
12.7 |
|
Conductance (µS/cm @ 25 °C) |
136 |
Magnesium (mg/L) |
13.3 |
|
Color (Pt-Co units) |
34 |
Sodium (mg/L) |
5.7 |
|
Chloride (mg/L) |
13.0 |
Potassium (mg/L) |
3.7 |
|
Silicon (mg/L) |
1.5 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 39 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
17 |
29 |
42 |
|
Long-term total nitrogen concentrations (µg/L) |
680 |
1090 |
1730 |
|
Long-term total chlorophyll concentrations (µg/L) |
5.0 |
16.8 |
66.7 |
|
Long-term Secchi depth (ft) |
2.0 |
4.2 |
6.0 |
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 |
|
May-28-99 |
30 |
680 |
8.0 |
4.3 |
|
Jun-13-99 |
39 |
790 |
8.3 |
4.8 |
|
Jul-15-99 |
21 |
700 |
7.3 |
5.0 |
|
|
|
|
|
|
|
1999 Average |
30 |
720 |
7.9 |
4.7 |
Pierce (Polk County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on May 20, 1993
|
Percent area covered with aquatic vegetation (PAC, %) |
96 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
56 |
|
Average emergent plant biomass (kg wet wt/m2) |
7.3 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
3.5 |
|
Average submersed plant biomass (kg wet wt/m2) |
19.3 |
|
Average width of emergent and floating-leaved zone (ft.) |
390 |
|
Average lake depth (m) |
2 |
Frequency that plant species occur in 15 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
hydrilla |
Hydrilla verticillata |
100 |
|
cat-tail |
Typha spp. |
80 |
|
spatterdock |
Nuphar luteum |
73 |
|
knot grass |
Paspalum distichum |
67 |
|
fragrant water-lily |
Nymphaea odorata |
53 |
|
floating water-hyacinth |
Eichhornia crassipes |
40 |
|
water primrose |
Ludwigia octovalvis |
33 |
|
water-pennywort |
Hydrocotyle umbellata |
27 |
|
buttonbush |
Cephalanthus occidentalis |
27 |
|
green algae |
Chlorphyta |
27 |
|
common duckweed |
Lemna minor |
20 |
|
duck-potato |
Sagittaria lancifolia |
20 |
|
pickerelweed |
Pontederia cordata |
20 |
|
coontail |
Ceratophyllum demersum |
20 |
|
elephant-ear |
Colocasia esculenta |
20 |
|
willow |
Salix spp. |
20 |
|
bladderwort |
Utricularia foliosa |
20 |
|
tapegrass |
Vallisneria americana |
13 |
|
Illinois pondweed |
Potamogeton illinoensis |
13 |
|
maidencane |
Panicum hemitomon |
13 |
|
common salvinia |
Salvinia rotundifolia |
7 |
|
alligator-weed |
Alternanthera philoxeroides |
7 |
|
slender spikerush |
Eleocharis baldwinii |
7 |
|
cone-spur bladderwort |
Utricularia gibba |
7 |
|
purple bladderwort |
Utricularia purpurea |
7 |
|
torpedograss |
Panicum repens |
7 |
|
spider-grass |
Websteria confervoides |
7 |
|
elderberry |
Sambucus canadensis |
7 |