Ivanhoe West (Orange County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 28°33'55", Longitude 81°22'57"

Period of record: 73 sampling dates; April 5, 1993 to December 7, 1999

Surface area (LAKEWATCH): 69 acres / 28 hectacres     Bathymetric Map

Lake Region (Griffith et al. 1997): Orlando Ridge

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 Orlando Promontory 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Supplemental, unpublished water chemistry data, University of Florida.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
8.0
 Sulfate (mg/L)
13.7
Total alkalinity (mg/L as CaCO3)
53.0
 Conductance (µS/cm @ 25 °C)
199
Color (Pt-Co units)
12
 Chloride (mg/L)
16.3

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 73 months sampled:

 
Minimum
Average
Maximum
Long-term total phosphorus concentrations (µg/L)
19
34
74
Long-term total nitrogen concentrations (µg/L)
380
630
1040
Long-term total chlorophyll concentrations (µg/L)
7.7
32.9
59.7
Long-term Secchi depth (ft)
1.7
3.3
4.8

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-19-99
28
450
17.7
4.3
Feb-09-99
19
450
14.0
4.7
Apr-06-99
37
590
19.3
4.0
May-04-99
31
650
18.7
3.7
May-28-99
32
700
59.7
.
Aug-31-99
41
660
45.7
3.0
Sep-23-99
43
690
51.7
3.0
Oct-05-99
34
560
41.3
3.0
Nov-09-99
41
630
42.3
3.5
Dec-07-99
47
700
36.0
3.5
         
1999 Average
35
610
34.6
3.6

Ivanhoe (Orange County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 28, 1994

Percent area covered with aquatic vegetation (PAC, %)
14
Percent of lake's volume filled with vegetation (PVI, %)
2
Average emergent plant biomass (kg wet wt/m2)
1.7
Average floating-leaved plant biomass (kg wet wt/m2)
0.6
Average submersed plant biomass (kg wet wt/m2)
2.6
Average width of emergent and floating-leaved zone (ft.)
10
Average lake depth (m)
4

Frequency that plant species occur in 15 evenly spaced transects around the lake.

Common Name Plant Species
Frequency (%)
bald cypress Taxodium distichum
67
tapegrass Vallisneria americana
60
elephant-ear Colocasia esculenta
60
alligator-weed Alternanthera philoxeroides
40
pickerelweed Pontederia cordata
40
water-pennywort Hydrocotyle umbellata
40
wax myrtle Myrica cerifera
33
torpedograss Panicum repens
33
willow Salix spp.
27
spatterdock Nuphar luteum
20
water primrose Ludwigia octovalvis
20
giant bulrush Scirpus californicus
20
baby-tears Micranthemum umbrosum
13
maidencane Panicum hemitomon
13
cat-tail Typha spp.
7
soft rush Juncus effusus
7

Ivanhoe West (Orange County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 9, 1993

Percent area covered with aquatic vegetation (PAC, %)
28
Percent of lake's volume filled with vegetation (PVI, %)
2
Average emergent plant biomass (kg wet wt/m2)
1.8
Average floating-leaved plant biomass (kg wet wt/m2)
0.8
Average submersed plant biomass (kg wet wt/m2)
1.8
Average width of emergent and floating-leaved zone (ft.)
18
Average lake depth (m)
4

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

Common Name Plant Species
Frequency (%)
tapegrass Vallisneria americana
80
bald cypress Taxodium distichum
80
water-pennywort Hydrocotyle umbellata
70
alligator-weed Alternanthera philoxeroides
50
spatterdock Nuphar luteum
30
yellow nut-grass Cyperus esculentus
30
wax myrtle Myrica cerifera
20
willow Salix spp.
20
giant bulrush Scirpus californicus
20
pickerelweed Pontederia cordata
10
cat-tail Typha spp.
10
elephant-ear Colocasia esculenta
10
soft rush Juncus effusus
10

Ivanhoe West (Orange County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 3, 1999

Percent area covered with aquatic vegetation (PAC, %)
28
Percent of lake's volume filled with vegetation (PVI, %)
6
Average emergent plant biomass (kg wet wt/m2)
4.4
Average floating-leaved plant biomass (kg wet wt/m2)
1.6
Average submersed plant biomass (kg wet wt/m2)
0.6
Average width of emergent and floating-leaved zone (ft.)
25
Average lake depth (m)
4

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

Common Name Plant Species
Frequency (%)
pickerelweed Pontederia cordata
60
bald cypress Taxodium distichum
60
spatterdock Nuphar luteum
50
maidencane Panicum hemitomon
50
giant bulrush Scirpus californicus
40
tapegrass Vallisneria americana
20
wax myrtle Myrica cerifera
20
willow Salix spp.
20
slender spikerush Eleocharis baldwinii
10
water-pennywort Hydrocotyle umbellata
10
elephant-ear Colocasia esculenta
10
torpedograss Panicum repens
10
umbrella sedge Cyperus alternifolius
10
giant spikerush Eleocharis interstincta
10
Arrow root Thalia geniculata
10
red maple Acer rubrum
10

Ivanhoe (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)
Blue tilapia
5
4.6
.
.
.
Bluegill
609
4.7
0.3
50.3
447
Brook silverside
1
0
0
0.2
1.4
Bluespotted sunfish
7
0
0
0
0.1
Channel catfish
1
0.8
.
.
.
Florida gar
4
4.1
0.8
50.1
328.6
Golden shiner
4
0.1
0
6.9
65
Largemouth bass
34
19.1
1.1
82
284.6
Eastern mosquitofish
6
0
0
0.14
1.97
Redbreast sunfish
30
1.2
1.3
2.8
4.7
Redear sunfish
40
1.4
0.1
24.3
183.1
Seminole killifish
353
3.3
0
4.2
22.3
Swamp darter
2
0
0
0
0
Tadpole madtom
1
0
0.02
0.02
0.02
Taillight shiner
1
0
0
0.1
0.4
Warmouth
3
0
0
1.5
12
           
Total
1101
39.2
      

 

1 Total # of species = 16.
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 Ivanhoe (Highlands County) electrofishing sampling (o). The lines represent linear regressions for logged values of the 60 Florida lakes.
 
 

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