Conway North (Orange County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 28°28'12", Longitude 81°20'43"

Period of record: 24 sampling dates; August 1, 1992 to November 23, 1997

Surface area (LAKEWATCH): 677 acres / 274 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Supplemental, unpublished water chemistry data, University of Florida.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 1 month sampled:
 
pH
7.5
 Total alkalinity (mg/L as CaCO3)
28.0
Conductance (µS/cm @ 25 °C)
242
 Color (Pt-Co units)
5
Chloride (mg/L)
32.8
    

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 24 months sampled:

 
Minimum
Average
Maximum
Long-term total phosphorus concentrations (µg/L)
7
11
17
Long-term total nitrogen concentrations (µg/L)
340
500
820
Long-term total chlorophyll concentrations (µg/L)
1.0
9.8
22.3
Long-term Secchi depth (ft)
3.9
9.5
14.8

Florida LAKEWATCH data were not collected in 1999.
 

Conway North (Orange County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on July 5, 1994

Percent area covered with aquatic vegetation (PAC, %)
37
Percent of lake's volume filled with vegetation (PVI, %)
5
Average emergent plant biomass (kg wet wt/m2)
1.8
Average floating-leaved plant biomass (kg wet wt/m2)
0.3
Average submersed plant biomass (kg wet wt/m2)
0.8
Average width of emergent and floating-leaved zone (ft.)
82
Average lake depth (m)
6

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

Common Name Plant Species
Frequency (%)
Illinois pondweed Potamogeton illinoensis
80
torpedograss Panicum repens
80
rush fuirena Fuirena scirpoidea
80
cat-tail Typha spp.
70
pickerelweed Pontederia cordata
60
stonewort Nitella spp.
60
duck-potato Sagittaria lancifolia
50
tapegrass Vallisneria americana
50
water primrose Ludwigia octovalvis
50
melaleuca Melaleuca quinquenervia
40
maidencane Panicum hemitomon
40
wax myrtle Myrica cerifera
30
respuinata bladderwort Utricularia resupinata
30
. Nitella prolonga
30
fragrant water-lily Nymphaea odorata
20
water-pennywort Hydrocotyle umbellata
20
dwarf arrowhead Sagittaria subulata
20
coontail Ceratophyllum demersum
20
hydrilla Hydrilla verticillata
20
elephant-ear Colocasia esculenta
20
willow Salix spp.
20
floating water-hyacinth Eichhornia crassipes
10
common salvinia Salvinia rotundifolia
10
spatterdock Nuphar luteum
10
bacopa Bacopa monnieri
10
baby-tears Micranthemum umbrosum
10
purple bladderwort Utricularia purpurea
10
flat-sedge Cyperus odoratus
10
bladderwort Utricularia foliosa
10
elderberry Sambucus canadensis
10

Conway North (Orange County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 15, 1999

Percent area covered with aquatic vegetation (PAC, %)
42
Percent of lake's volume filled with vegetation (PVI, %)
10
Average emergent plant biomass (kg wet wt/m2)
2.1
Average floating-leaved plant biomass (kg wet wt/m2)
0.3
Average submersed plant biomass (kg wet wt/m2)
1.0
Average width of emergent and floating-leaved zone (ft.)
67
Average lake depth (m)
4

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

Common Name Plant Species
Frequency (%)
torpedograss Panicum repens
80
cat-tail Typha spp.
70
rush fuirena Fuirena scirpoidea
70
Illinois pondweed Potamogeton illinoensis
60
duck-potato Sagittaria lancifolia
50
water primrose Ludwigia octovalvis
50
pickerelweed Pontederia cordata
20
water-pennywort Hydrocotyle umbellata
20
hydrilla Hydrilla verticillata
20
tapegrass Vallisneria americana
20
willow Salix spp.
20
spatterdock Nuphar luteum
10
bacopa Bacopa monnieri
10
coontail Ceratophyllum demersum
10
cone-spur bladderwort Utricularia gibba
10
flat-sedge Cyperus odoratus
10
giant bulrush Scirpus californicus
10
maidencane Panicum hemitomon
10
stonewort Nitella spp.
10

Conway (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)
Bluegill
77
0.9
0.3
50.3
447
Bluespotted sunfish
4
0
0
0
0.1
Brook silverside
12
0
0
0.2
1.4
Chain pickerel
14
6
0
17.5
57.1
Golden shiner
1
0
0
6.9
65
Lake chubsucker
8
2.4
0.1
40.7
161.9
Largemouth bass
39
11.4
1.1
82
284.6
Redear sunfish
30
1.3
0.1
24.3
183.1
Seminole killifish
22
0.3
0
4.2
22.3
Spotted gar
1
0.8
.
.
.
Spotted sunfish
6
0.2
0
0.9
3.2
Taillight shiner
24
0
0
0.1
0.4
Warmouth
7
0.3
0
1.5
12
           
Total
245
23.6
      

 

1 Total # of species = 13.
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 Conway (Orange County) electrofishing sampling (o). The lines represent linear regressions for logged values of the 60 Florida lakes.

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