Starke (Orange County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 28°34'6", Longitude 81°32'8"

Period of record: 77 sampling dates; July 30, 1992 to December 7, 1999

Surface area (LAKEWATCH): 329 acres / 133 hectacres     Bathymetric Map

Lake Region (Griffith et al. 1997): Apopka Upland

Geologic formation (Brooks 1981):

The geology is dominated by phosphatic sand, silty sand, and clay of the Hawthorne Formation.

Physiographic region (Brooks 1981):

The water body lies in the Apopka Hills subdivision of the Apopka Upland division of the Central Lake District.
 
 

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 77 months sampled:

 
Minimum
Average
Maximum
Long-term total phosphorus concentrations (µg/L)
13
29
51
Long-term total nitrogen concentrations (µg/L)
640
1020
1520
Long-term total chlorophyll concentrations (µg/L)
6.3
27.4
71.7
Long-term Secchi depth (ft)
2.0
3.2
5.0

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
Feb-09-99
34
930
20.0
3.0
Mar-17-99
27
1070
26.7
3.0
Apr-14-99
26
1070
17.0
3.0
May-13-99
23
1060
18.7
3.0
Jul-28-99
22
930
23.0
3.0
Aug-03-99
22
1030
17.7
3.0
Sep-27-99
26
1160
47.3
2.0
Nov-09-99
43
1170
49.0
2.0
Dec-07-99
37
990
40.3
2.0
         
1999 Average
29
1050
28.9
2.7

 

Starke (Orange County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on May 17, 1994

Percent area covered with aquatic vegetation (PAC, %)
6
Percent of lake's volume filled with vegetation (PVI, %)
1
Average emergent plant biomass (kg wet wt/m2)
3.7
Average floating-leaved plant biomass (kg wet wt/m2)
1.9
Average submersed plant biomass (kg wet wt/m2)
0.5
Average width of emergent and floating-leaved zone (ft.)
38
Average lake depth (m)
5

 

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

Common Name Plant Species
Frequency (%)
torpedograss Panicum repens
90
floating water-hyacinth Eichhornia crassipes
80
cat-tail Typha spp.
80
water primrose Ludwigia octovalvis
60
willow Salix spp.
60
duck-potato Sagittaria lancifolia
50
common salvinia Salvinia rotundifolia
40
pickerelweed Pontederia cordata
40
tapegrass Vallisneria americana
40
elephant-ear Colocasia esculenta
40
rush fuirena Fuirena scirpoidea
40
maidencane Panicum hemitomon
30
musk-grass Chara spp.
30
water-pennywort Hydrocotyle umbellata
20
soft rush Juncus effusus
20
bladderwort Utricularia foliosa
20
giant duckweed Spirodela polyrhiza
10

 

Starke (Orange County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 17, 1999

Percent area covered with aquatic vegetation (PAC, %)
16
Percent of lake's volume filled with vegetation (PVI, %)
2
Average emergent plant biomass (kg wet wt/m2)
7.4
Average floating-leaved plant biomass (kg wet wt/m2)
1.7
Average submersed plant biomass (kg wet wt/m2)
4.1
Average width of emergent and floating-leaved zone (ft.)
88
Average lake depth (m)
4

 

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

Common Name Plant Species
Frequency (%)
cat-tail Typha spp.
90
torpedograss
Panicum repens
80
willow Salix spp.
70
duck-potato Sagittaria lancifolia
60
pickerelweed Pontederia cordata
60
tapegrass Vallisneria americana
60
water primrose Ludwigia octovalvis
60
musk-grass Chara spp.
50
rush fuirena Fuirena scirpoidea
50
maidencane Panicum hemitomon
40
elephant-ear Colocasia esculenta
30
floating water-hyacinth Eichhornia crassipes
20
dwarf arrowhead Sagittaria subulata
20
bulrush spp. Juncus spp.
20
water-lettuce Pistia stratiotes
10
fragrant water-lily Nymphaea odorata
10
water-pennywort Hydrocotyle umbellata
10
flat-sedge Cyperus odoratus
10
bladderwort Utricularia foliosa
10
sedge spp. Cyperus spp.
10

 

Starke (Orange County)

Electrofishing Data

     
Canfield and Hoyer (1992) Ranges
Species1
#/hr
kg/hr2
min weight (kg/hr)
mean weight (kg/hr)
max weight (kg/hr)
Black crappie
2
0.3
0.1
6.4
28.7
Blue tilapia
2
1.9
6.1
17.4
28.6
Bluegill
935
26.5
0.3
50.3
447
Brook silverside
4
0
0
0.2
1.4
Brown bullhead
3
1.1
0.1
14.5
72.1
Golden shiner
1376
12.3
0
6.9
65
Largemouth bass
69
37.4
1.1
82
284.6
Redbreast sunfish
34
0.4
1.3
2.8
4.7
Redear sunfish
59
2.5
0.1
24.3
183.1
Seminole killifish
112
1.1
0
4.2
22.3
Threadfin shad
2
0
0
2.7
10.9
Warmouth
4
0.2
0
1.5
12
           
Total
2602
83.7
      

 

1 Total # of species = 12.

2 Weights calculated using regressions from Hoyer and Canfield 1994 and from Bill Schaeffer, Florida Fish and Wildlife Conservation Commission (personal communication).
 
 

Catch per unit of effort (kg of fish / hour of sampling) versus total chlorophyll (mg/m3) and number of fish species collected versus surface area of lake for 60 Florida lakes sampled by Canfield and Hoyer (1992) (•) and Lake Starke (Orange County) electrofishing sampling (o). The lines represent linear regressions for logged values of the 60 Florida lakes.


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