Bear (Seminole County)

Bear (Seminole County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 28°39'10", Longitude 81°26'55"

Period of record: 99 sampling dates; November 30, 1991 to December 19, 1999

Surface area (LAKEWATCH): 462 acres / 187 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.

Supplemental, unpublished water chemistry data, University of Florida.

Numbers reported below are the average for 2 months sampled:

pH	7.1	Sulfate (mg/L)	18.3
Total alkalinity (mg/L as CaCO₃)	6.8	Calcium (mg/L)	4.8
Conductance (µS/cm @ 25 °C)	146	Magnesium (mg/L)	2.3
Color (Pt-Co units)	12	Sodium (mg/L)	16.0
Chloride (mg/L)	26.9	Potassium (mg/L)	3.5
Silicon (mg/L)	0.6

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 99 months sampled:

	Minimum	Average	Maximum
Long-term total phosphorus concentrations (µg/L)	9	13	21
Long-term total nitrogen concentrations (µg/L)	300	400	590
Long-term total chlorophyll concentrations (µg/L)	1.0	3.2	9.5
Long-term Secchi depth (ft)	8.1	13.4	22.0

1999 Florida LAKEWATCH Data

Numbers reported below are monthly averages calculated from 4 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	10	440	2.0	18.2
Feb-21-99	12	380	2.8	16.9
Mar-20-99	12	400	2.2	20.6
Apr-20-99	11	360	1.5	22.0
May-23-99	12	380	3.0	13.5
Jun-26-99	17	500	6.5	9.5
Jul-24-99	14	450	4.0	10.1
Aug-31-99	16	570	6.8	8.1
Sep-25-99	16	470	7.2	8.4
Oct-27-99	15	450	4.2	9.4
Nov-23-99	19	450	6.8	8.4
Dec-19-99	20	460	3.0	10.9

1999 Average	14	440	4.2	13.0

Bear (Seminole County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on July 15, 1992

Percent area covered with aquatic vegetation (PAC, %)	0
Percent of lake's volume filled with vegetation (PVI, %)	0
Average emergent plant biomass (kg wet wt/m2)	0.0
Average floating-leaved plant biomass (kg wet wt/m2)	0.4
Average submersed plant biomass (kg wet wt/m2)	0.2
Average width of emergent and floating-leaved zone (ft.)	7
Average lake depth (m)	4

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

Common Name	Plant Species	Frequency (%)
slender spikerush	Eleocharis baldwinii	100
water primrose	Ludwigia octovalvis	30
torpedograss	Panicum repens	30
spatterdock	Nuphar luteum	20
buttonbush	Cephalanthus occidentalis	20
musk-grass	Chara spp.	20
fragrant water-lily	Nymphaea odorata	10
cat-tail	Typha spp.	10
water-pennywort	Hydrocotyle umbellata	10

Bear (Seminole County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on July 7, 1993

Percent area covered with aquatic vegetation (PAC, %)	8
Percent of lake's volume filled with vegetation (PVI, %)	1
Average emergent plant biomass (kg wet wt/m2)	0.1
Average floating-leaved plant biomass (kg wet wt/m2)	0.1
Average submersed plant biomass (kg wet wt/m2)	0.1
Average width of emergent and floating-leaved zone (ft.)	8
Average lake depth (m)	4

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

Common Name	Plant Species	Frequency (%)
musk-grass	Chara spp.	100
slender spikerush	Eleocharis baldwinii	60
elephant-ear	Colocasia esculenta	60
torpedograss	Panicum repens	60
water-pennywort	Hydrocotyle umbellata	50
variableleaf pondweed	Potamogeton diversifolius	50
water primrose	Ludwigia octovalvis	50
green algae	Chlorphyta	50
dwarf arrowhead	Sagittaria subulata	40
wax myrtle	Myrica cerifera	30
spatterdock	Nuphar luteum	20
rush spp.	Juncus dichotomus	20
alligator-weed	Alternanthera philoxeroides	10
yellow water-lily	Nymphaea mexicana	10
fragrant water-lily	Nymphaea odorata	10
red ludwigia	Ludwigia repens	10
pickerelweed	Pontederia cordata	10
baby-tears	Micranthemum umbrosum	10
salt-bush	Baccharis spp.	10
buttonbush	Cephalanthus occidentalis	10
willow	Salix spp.	10
maidencane	Panicum hemitomon	10
stonewort	Nitella spp.	10
rush fuirena	Fuirena scirpoidea	10
yellow-eyed grass	Xyris spp.	10
bald cypress	Taxodium distichum	10
jointed flat sedge	Cyperus haspan	10
large headed beak-rush	Rhynchospora chalarocephala	10
yellow nut-grass	Cyperus esculentus	10

Bear (Seminole County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on July 29, 1999

Percent area covered with aquatic vegetation (PAC, %)	24
Percent of lake's volume filled with vegetation (PVI, %)	3
Average emergent plant biomass (kg wet wt/m2)	1.7
Average floating-leaved plant biomass (kg wet wt/m2)	3.5
Average submersed plant biomass (kg wet wt/m2)	0.1
Average width of emergent and floating-leaved zone (ft.)	9
Average lake depth (m)	4

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

Common Name	Plant Species	Frequency (%)
water primrose	Ludwigia octovalvis	90
torpedograss	Panicum repens	90
slender spikerush	Eleocharis baldwinii	70
flat-sedge	Cyperus odoratus	70
respuinata bladderwort	Utricularia resupinata	70
water-pennywort	Hydrocotyle umbellata	60
elephant-ear	Colocasia esculenta	60
cat-tail	Typha spp.	50
pickerelweed	Pontederia cordata	40
variableleaf pondweed	Potamogeton diversifolius	40
baby-tears	Micranthemum umbrosum	30
dwarf arrowhead	Sagittaria subulata	30
floating water-hyacinth	Eichhornia crassipes	20
alligator-weed	Alternanthera philoxeroides	20
spatterdock	Nuphar luteum	20
green algae	Chlorphyta	20
red maple	Acer rubrum	20
wax myrtle	Myrica cerifera	10
buttonbush	Cephalanthus occidentalis	10
giant bulrush	Scirpus californicus	10
stonewort	Nitella spp.	10
rush fuirena	Fuirena scirpoidea	10
yellow-eyed grass	Xyris spp.	10
jointed flat sedge	Cyperus haspan	10
sedge spp.	Cyperus spp.	10
sweetbay	Magnolia virginiana	10

Back to blakes page