Lochloosa (Alachua County)

Lochloosa (Alachua County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 29°31'38", Longitude 82°8'26"

Period of record: 72 sampling dates; September 3, 1993 to November 29, 1999

Surface area (LAKEWATCH): No data available.

Lake Region (Griffith et al. 1997): Central Valley

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 Alachua Prairies subdivision of the Northern Peninsual Plains division of the Ocala Uplift District.

Supplemental, unpublished water chemistry data, University of Florida.

Numbers reported below are the average for 7 months sampled:

pH	7.6	Sulfate (mg/L)	3.9
Total alkalinity (mg/L as CaCO₃)	24.4	Calcium (mg/L)	9.7
Conductance (µS/cm @ 25 °C)	90	Magnesium (mg/L)	5.1
Color (Pt-Co units)	89	Sodium (mg/L)	6.1
Chloride (mg/L)	11.6	Potassium (mg/L)	0.4
Silicon (mg/L)	0.7

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 72 months sampled:

	Minimum	Average	Maximum
Long-term total phosphorus concentrations (µg/L)	29	53	82
Long-term total nitrogen concentrations (µg/L)	750	1910	3870
Long-term total chlorophyll concentrations (µg/L)	13.8	85.6	292.0
Long-term Secchi depth (ft)	0.7	1.8	5.0

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-25-99	63	2550	154.8	0.8
Feb-25-99	61	2200	142.2	1.1
Mar-24-99	66	2470	120.2	1.2
Apr-30-99	82	3250	292.0	0.8
May-25-99	74	3870	236.0	0.8
Jul-01-99	29	1500	20.8	5.0
Jul-27-99	46	1190	19.2	2.3
Aug-18-99	63	1240	111.5	1.1
Sep-29-99	74	1530	174.5	.
Nov-29-99	72	3720	253.8	0.7

1999 Average	63	2350	152.5	1.5

Lochloosa (Alachua County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on August 14, 1991

Percent area covered with aquatic vegetation (PAC, %)	70
Percent of lake's volume filled with vegetation (PVI, %)	22
Average emergent plant biomass (kg wet wt/m2)	6.8
Average floating-leaved plant biomass (kg wet wt/m2)	8.4
Average submersed plant biomass (kg wet wt/m2)	7.8
Average width of emergent and floating-leaved zone (ft.)	259
Average lake depth (m)	2

Frequency that plant species occur in 16 evenly spaced transects around the lake.

Common Name	Plant Species	Frequency (%)
floating water-hyacinth	Eichhornia crassipes	94
hydrilla	Hydrilla verticillata	94
coontail	Ceratophyllum demersum	88
water-pennywort	Hydrocotyle umbellata	75
pickerelweed	Pontederia cordata	69
cat-tail	Typha spp.	69
knot grass	Paspalum distichum	69
frog's-bit	Limnobium spongia	62
green algae	Chlorphyta	56
alligator-weed	Alternanthera philoxeroides	50
smartweed	Polygonum hydropiperoides	50
spatterdock	Nuphar luteum	38
water-lettuce	Pistia stratiotes	31
common arrowhead	Sagittaria latifolia	25
common duckweed	Lemna minor	19
common salvinia	Salvinia rotundifolia	12
water paspalum	Paspalum repens	12
duck-potato	Sagittaria lancifolia	6
American lotus	Nelumbo lutea	6
red ludwigia	Ludwigia repens	6
elephant-ear	Colocasia esculenta	6
water primrose	Ludwigia octovalvis	6
sedge family	Cyperaceae	6

Lochloosa (Alachua County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 16, 1997

Percent area covered with aquatic vegetation (PAC, %)	53
Percent of lake's volume filled with vegetation (PVI, %)	15
Average emergent plant biomass (kg wet wt/m2)	2.4
Average floating-leaved plant biomass (kg wet wt/m2)	2.3
Average submersed plant biomass (kg wet wt/m2)	3.5
Average width of emergent and floating-leaved zone (ft.)	101
Average lake depth (m)	2

Frequency that plant species occur in 30 evenly spaced transects around the lake.

Common Name	Plant Species	Frequency (%)
hydrilla	Hydrilla verticillata	90
pickerelweed	Pontederia cordata	77
bald cypress	Taxodium distichum	73
elephant-ear	Colocasia esculenta	67
knot grass	Paspalum distichum	67
water-pennywort	Hydrocotyle umbellata	60
common duckweed	Lemna minor	57
spatterdock	Nuphar luteum	57
common salvinia	Salvinia rotundifolia	43
floating water-hyacinth	Eichhornia crassipes	37
buttonbush	Cephalanthus occidentalis	37
willow	Salix spp.	37
water hemlock	Cicuta mexicana	37
alligator-weed	Alternanthera philoxeroides	33
cat-tail	Typha spp.	33
wax myrtle	Myrica cerifera	33
smartweed	Polygonum hydropiperoides	30
coontail	Ceratophyllum demersum	23
maidencane	Panicum hemitomon	20
cone-spur bladderwort	Utricularia gibba	17
duck-potato	Sagittaria lancifolia	13
southern naiad	Najas guadalupensis	13
water primrose	Ludwigia octovalvis	13
American lotus	Nelumbo lutea	10
purple bladderwort	Utricularia purpurea	10
giant duckweed	Spirodela polyrhiza	7
parrot's-feather	Myriophyllum aquaticum	3
frog's-bit	Limnobium spongia	3
sawgrass	Cladium jamaicense	3
soft stem bulrush	Scirpus validus	3
soft rush	Juncus effusus	3
yellow-eyed grass	Xyris spp.	3

Lochloosa (Alachua County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on May 18, 1999

Percent area covered with aquatic vegetation (PAC, %)	22
Percent of lake's volume filled with vegetation (PVI, %)	7
Average emergent plant biomass (kg wet wt/m2)	5.8
Average floating-leaved plant biomass (kg wet wt/m2)	4.3
Average submersed plant biomass (kg wet wt/m2)	0.0
Average width of emergent and floating-leaved zone (ft.)	99
Average lake depth (m)	2

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

Common Name	Plant Species	Frequency (%)
bald cypress	Taxodium distichum	95
wax myrtle	Myrica cerifera	85
pickerelweed	Pontederia cordata	80
spatterdock	Nuphar luteum	75
elephant-ear	Colocasia esculenta	75
knot grass	Paspalum distichum	75
water-pennywort	Hydrocotyle umbellata	65
buttonbush	Cephalanthus occidentalis	60
red maple	Acer rubrum	50
willow	Salix spp.	35
giant duckweed	Spirodela polyrhiza	30
maidencane	Panicum hemitomon	30
common salvinia	Salvinia rotundifolia	25
elderberry	Sambucus canadensis	25
common arrowhead	Sagittaria latifolia	20
cat-tail	Typha spp.	15
hydrilla	Hydrilla verticillata	15
water primrose	Ludwigia octovalvis	15
floating water-hyacinth	Eichhornia crassipes	10
duck-potato	Sagittaria lancifolia	10
coontail	Ceratophyllum demersum	10
cone-spur bladderwort	Utricularia gibba	10
bulrush spp.	Juncus spp.	10
para grass	Brachiaria mutica	5
red root	Lachnanthes caroliniana	5
sedge spp.	Cyperus spp.	5

Lochloosa (Alachua 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	0.1	0.1	6.4	28.7
Bluegill	13	1.1	0.3	50.3	447
Bowfin	1	1.5	3	54.5	225
Brook silverside	23	0	0	0.2	1.4
Brown bullhead	6	3	0.1	14.5	72.1
Chain pickerel	1	1.4	0	17.5	57.1
Eastern mosquitofish	8	0	0	0.14	1.97
Florida gar	17	11.6	0.8	50.1	328.6
Gizzard shad	132	12.4	0	10.3	39.5
Golden shiner	2	0	0	6.9	65
Largemouth bass	11	4.4	1.1	82	284.6
Redear sunfish	3	0.5	0.1	24.3	183.1
Redfin pickerel	1	0	0.1	0.1	0.2
Spotted sunfish	3	0.1	0	0.9	3.2
Taillight shiner	3	0	0	0.1	0.4
Threadfin shad	524	2.8	0	2.7	10.9
Warmouth	9	0.9	0	1.5	12
Yellow bullhead	1	0.3	0	2.2	7.2

Total	760	41

^{1 Total # of species = 18.

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