Alligator (Osceola County)

Alligator (Osceola County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 28°12'38", Longitude 81°12'4"

Period of record: 112 sampling dates; June 19, 1990 to December 22, 1999

Surface area (LAKEWATCH): No data available. (Go to Bathymetric Map)

Lake Region (Griffith et al. 1997): Osceola Slope

Geologic formation (Brooks 1981):

The geology is dominated by coastal sand and shelly silty sand of the preglacial Pleistocene.

Physiographic region (Brooks 1981):

The water body lies in the Kissimmee Valley division of the Eastern Flatwoods District.

Supplemental, unpublished water chemistry data, University of Florida.

Numbers reported below are the average for 4 months sampled:

pH	6.0	Sulfate (mg/L)	12.0
Total alkalinity (mg/L as CaCO₃)	2.3	Calcium (mg/L)	4.3
Conductance (µS/cm @ 25 °C)	109	Magnesium (mg/L)	9.6
Color (Pt-Co units)	47	Sodium (mg/L)	11.5
Chloride (mg/L)	22.4	Potassium (mg/L)	1.9
Silicon (mg/L)	0.4

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 112 months sampled:

	Minimum	Average	Maximum
Long-term total phosphorus concentrations (µg/L)	6	13	25
Long-term total nitrogen concentrations (µg/L)	400	580	830
Long-term total chlorophyll concentrations (µg/L)	1.0	3.7	12.8
Long-term Secchi depth (ft)	3.0	5.9	10.0

1999 Florida LAKEWATCH Data

Numbers reported below are monthly averages calculated from 5 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-28-99	15	410	2.8	5.8
Feb-26-99	17	530	2.4	6.0
Mar-23-99	15	510	2.8	6.0
Apr-19-99	16	510	3.2	5.8
May-27-99	12	460	2.6	7.0
Jun-25-99	12	490	4.6	6.8
Jul-29-99	13	490	4.0	6.5
Aug-25-99	14	490	7.4	6.8
Oct-27-99	15	600	5.6	4.4
Nov-22-99	16	780	3.8	3.8
Dec-22-99	18	620	7.8	4.6

1999 Average	15	540	4.3	5.8

Alligator (Osceola County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 29, 1993

Percent area covered with aquatic vegetation (PAC, %)	18
Percent of lake's volume filled with vegetation (PVI, %)	1
Average emergent plant biomass (kg wet wt/m2)	2.7
Average floating-leaved plant biomass (kg wet wt/m2)	1.3
Average submersed plant biomass (kg wet wt/m2)	1.5
Average width of emergent and floating-leaved zone (ft.)	287
Average lake depth (m)	3

Frequency that plant species occur in 20 evenly spaced transects around the lake.

Common Name	Plant Species	Frequency (%)
Brazilian elodea	Egeria densa	90
pickerelweed	Pontederia cordata	85
bog-moss	Mayaca fluviatilis	85
cat-tail	Typha spp.	75
banana-lily	Nymphoides aquatica	65
fragrant water-lily	Nymphaea odorata	65
torpedograss	Panicum repens	65
rush fuirena	Fuirena scirpoidea	55
variable-leaf milfoil	Myriophyllum heterophyllum	50
tapegrass	Vallisneria americana	45
willow	Salix spp.	45
maidencane	Panicum hemitomon	45
duck-potato	Sagittaria lancifolia	40
spatterdock	Nuphar luteum	40
lemon bacopa	Bacopa caroliniana	40
water-pennywort	Hydrocotyle umbellata	35
knot grass	Paspalum distichum	35
wax myrtle	Myrica cerifera	30
water primrose	Ludwigia octovalvis	30
buttonbush	Cephalanthus occidentalis	30
hydrilla	Hydrilla verticillata	25
purple bladderwort	Utricularia purpurea	20
variableleaf pondweed	Potamogeton diversifolius	15
sago pondweed	Potamogeton pectinatus	15
bladderwort	Utricularia foliosa	15
bald cypress	Taxodium distichum	15
Baldwin flat sedge	Cyperus globulosus	10
floating water-hyacinth	Eichhornia crassipes	5
common salvinia	Salvinia rotundifolia	5
slender spikerush	Eleocharis baldwinii	5
salt-bush	Baccharis spp.	5
sawgrass	Cladium jamaicense	5
St. John's wort	Hypericum spp.	5

Alligator (Osceola County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 9, 1998

Percent area covered with aquatic vegetation (PAC, %)	8
Percent of lake's volume filled with vegetation (PVI, %)	2
Average emergent plant biomass (kg wet wt/m2)	4.2
Average floating-leaved plant biomass (kg wet wt/m2)	2.2
Average submersed plant biomass (kg wet wt/m2)	1.0
Average width of emergent and floating-leaved zone (ft.)	221
Average lake depth (m)	3

Frequency that plant species occur in 20 evenly spaced transects around the lake.

Common Name	Plant Species	Frequency (%)
pickerelweed	Pontederia cordata	95
cat-tail	Typha spp.	85
bog-moss	Mayaca fluviatilis	85
torpedograss	Panicum repens	85
fragrant water-lily	Nymphaea odorata	75
slender naiad	Najas minor	65
buttonbush	Cephalanthus occidentalis	60
duck-potato	Sagittaria lancifolia	50
banana-lily	Nymphoides aquatica	50
maidencane	Panicum hemitomon	50
rush fuirena	Fuirena scirpoidea	50
spatterdock	Nuphar luteum	45
wax myrtle	Myrica cerifera	40
water primrose	Ludwigia octovalvis	40
variable-leaf milfoil	Myriophyllum heterophyllum	35
bacopa	Bacopa monnieri	25
water-pennywort	Hydrocotyle umbellata	25
tapegrass	Vallisneria americana	25
willow	Salix spp.	15
knot grass	Paspalum distichum	15
bald cypress	Taxodium distichum	15
slender spikerush	Eleocharis baldwinii	10
umbrella-grass	Fuirena squarrosa	10
stonewort	Nitella spp.	10
common salvinia	Salvinia rotundifolia	5
purple bladderwort	Utricularia purpurea	5
Brazilian pepper	Schinus terebinthifolius	5
sawgrass	Cladium jamaicense	5
flat-sedge	Cyperus odoratus	5
sedge spp.	Cyperus spp.	5

Alligator (Osceola County)
Trawl Data

Species	Size Group	Mean CPM	Range of TL (mm)
1998
species other than black crappie were not measured
1999
bluegill	all	0.49	35 - 192
bluegill	_18 cm	0.03	-
brown bullhead	all	0.03	418
chain pickerel	all	0.03	376
channel catfish	all	0.03	171
gizzard shad	all	0.14	218 - 377
largemouth bass	all	0.06	147 - 156
redear	all	0.03	64
redear	_18 cm	0	-
white catfish	all	0.14	299 - 394

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