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Report on Teton County Aquatic Invasive Species Survey Mark Sytsma and Vanessa Howard Center for Lakes and Reservoirs Portland State University Summary Numerous aquatic invasive species threaten western waterways. When established these nonnative species can degrade habitat for native species, interfere with recreation, and alter water quality. Many aquatic invasive species (AIS) can be introduced to new water bodies on trailered boats and on fishing gear transported to popular recreational areas such as those found along the Snake River and in Grand Teton National Park. Concerned about the spread of such species, Teton County Weed and Pest District funded Portland State University's Center for Lakes and Reservoirs to conduct early detection surveys for invasive plants and animals in high priority lakes and rivers. Between mid-July and mid-August, 2008 six lakes and twenty-two popular river access sites were surveyed. Target animals included Potamopyrgus antipodarum (New Zealand mud snail), Dreissenia spp. (zebra and quagga mussel) Orconectes rusticus (rusty crayfish), and Corbicula fluminea (Asian clam). Targeted plants included Myriophyllum spicatum (Eurasian watermilfoil), Potamogeton crispus (curly-leaf pondweed), Trapa natans (water chestnut); Hydrilla verticillata (water thyme), Myriophyllum aquaticum (parrotfeather), Egeria densa (Brazilian elodea), Lythrum salicaria (purple loosestrife), Tamarix spp. (saltcedar), Lepidium latifolium (perennial pepperweed), and Euphorbia esula (leafy spurge). None of these target species were detected, but continued surveillance is required to ensure early detection of new invaders that could enter Teton County from nearby infested areas.

Methods Lakes Surveys for aquatic plants involved haphazardly collecting a minimum of thirty samples at three sites, with depths ranging from shore to the maximum depth of colonization, and optimally a minimum of 100 samples per lake. Sites were chosen in areas likely to contain aquatic plant stands (shallow littoral areas) and in areas near likely sites of introduction of invasive species (marinas). Plants were collected using a thatch rake attached to a rope or pole that sampled an area of approximately 0.1 m2 and relative abundance recorded. All the plants attached to the rake upon retrieval were identified to the lowest taxon possible. Emergent plants were observed by boat, walking the shoreline and/or use of binoculars. Unrooted plant fragments found anywhere within the lake were noted as incidental. Animal surveys included trapping for crayfish, as well as substrate sampling for snails, unionid mussels and clams. Five to six baited crayfish traps were deployed for five hours minimum in locations near boat ramps and in littoral areas. Surveys for New Zealand mudsnails, quagga/zebra mussels and Asian clam (Corbicula fluminea) were conducted by examining rocks in a minimum of thirty 0.25-m2 quadrats and/or sediment samples collected with a Wildco Petite Teton Co. AIS Surveys 2008

1


Ponar dredge in areas with soft substrate or cobble < 5 cm diameter. Quadrats and dredge samples were collected from shallow water areas 40 m to either side of boat ramps and fishing access points. Voucher specimens were collected for each species and identified to the lowest taxon possible. A minimum of five dredge samples were taken from deeper water when substrate allowed. Rough estimates of abundance (rare, common, and abundant) were made for each species at each site. Additional sampling methods included the use of bottom viewers to scan for plants and animals while transiting between sampling sites; visual inspection for unionid mussels at permanent structures at marinas and boat launches; and collection of vertical plankton tows to identify the free-floating veliger stage of unionid mussels. Larval analysis was conducted on subsamples of each composite sample that were scanned under cross-polarized light at high magnification (S. Wells, pers. comm.). Rivers We conducted surveys for aquatic plants, snails, and unionid mussels by collecting a minimum of thirty 0.25-m2 quadrats and/or dredge samples haphazardly spaced along the stream within 50 m of the boat launch or access point. Where water depth or velocity made surveying across the entire stream reach dangerous, surveys were conducted from shore to a safe distance off shore. Voucher specimens of each species observed were collected and identified to the lowest taxon possible. Emergent plants were observed by boat, walking the shoreline and/or use of binoculars. Crayfish were sampled by deploying four baited traps in eddies or backwater areas at each site for a minimum of three hours. Unrooted plant fragments found along bank were noted as incidental. Decontamination Prior to leaving each site, all equipment was thoroughly scrubbed to remove all organic material and sediment and then sprayed with a 3% solution of Sparquat 256ÂŽ - a quaternary ammonium compound, and allowed to air dry. This protocol was approved by Wyoming Game and Fish Department and the National Park Service and should kill/decontaminate New Zealand mudsnails, zebra/quagga mussels, didymo, whirling disease, and chytrid fungus. Results Six lakes and 22 popular river access sites along the Snake River, Buffalo Fork River, Fish Creek and Pacific Creek were surveyed (Figure 1). None of the target plant or animal species were detected at any of the sites we sampled. Notable details and site-specific sampling notes are detailed below. Site-specific species lists and water quality measurements are included in Table 2 and Table 3. Animals No crayfish, native or introduced, were collected in traps at any sites. However, at the Snake River Elbow boat launch, numerous dead red swamp crayfish (Procambarus clarkia) were found discarded along the river shoreline along with potatoes and lemons â&#x20AC;&#x201C; presumably the discarded remnants of a crayfish boil. Sacks of live or fresh-boiled crayfish can be ordered by phone or the internet and air-shipped to private residences, which may have been source for those found at this site. Teton Co. AIS Surveys 2008

2


New Zeland mudsnails were found at Polecat Creek, John D Rockefeller Memorial Parkway, but they have been documented there in high abundances since June of 2000. The non-native snail Melanoides tuberculata was found at Kelly Warm Springs where it was first confirmed in 2002. This species, popular in the aquarium trade, is unlikely to spread downstream or survive if introduced to other areas with freezing winter temperatures. Native snails were found at many surveyed sites. Since identification to lower taxonomic levels requires examination of live or fresh specimens, most of those listed in the tables below are to the family level. No mature quagga/zebra mussels (Dreissenia spp) nor Asian clam (Corbicula fluminea) were found at any sites. Additionally, larval analysis of the composite plankton tows taken at Jackson Lake, Jenny Lake and Lower Slide Lake did not reveal any veligers of these organisms (Table 1). Ostracods were detected in most samples but are a type of common zooplankton, readily differentiated from Dreissenia spp.. Table 1. Larval analysis of composite plankton tows collected at five sites in Teton County. Waterbody Jackson Lake Jackson Lake Jackson Lake Jenny Lake Lower Slide Lake

site Colter Bay Signal Mountain Lodge Leeks Marina boat launch & E. ferry dock Atherton Creek boat launch

date

# of tows

volume (L)

Dreissenid

Corbiculid

Ostracod

8-Aug 9-Aug 8-Aug 11-Aug 16-Aug

4 4 4 5 4

4,948 5,203 6,283 5,890 6,823

0 0 0 0 0

0 0 0 0 0

0 24 45 1 3

Plants Watermilfoil species (Myriophyllum spp.) were found at numerous lakes and river sites, but none resembled the introduced Eurasian watermilfoil (M. spicatum). When flowers are lacking, determination of Myriophyllum species is difficult although certain vegetative characteristics can help identify possible M. spicatum (more than 14 leaflet pairs, squared off leaf tips, leaves tend to collapse around stem when removed from the water). At Lower Slide Lake, we found twoleaf waterweed (Elodea bifoliata), a relatively uncommon species compared to E. canadensis and E. nutallii, at multiple locations in low to medium abundance. The conservation status of this species is unranked in Wyoming, but it is considered imperiled in Montana, Utah, Nebraska and Kansas (NatureServe 2008). Sampling with the thatch rake was ineffective at Leigh Lake due to large boulders, thin sediments and sparsely spaced plants. We used the bottom viewer to search for and inventory plants, but were unable to survey the entire lake due to the amount of time required to portage via String Lake and the slow pace of sampling via canoe. No aquatic plants were found along the eastern lake edge, potentially because of wave disturbance. Those species noted in this lake were all found along the western edge of the lake, and most in the southern arm near Boulder Island. The northwestern portion of the lake may have suitable habitat for aquatic plants. The likelihood of introductions of aquatic invasive species to this lake are low given the remote nature of the lake and the lack of access to motor boats or other tailored water-craft.

Teton Co. AIS Surveys 2008

3


In 1997, seed pods of the non-native water chestnut (Trapa natans) were reportedly found on a sandy beach along the eastern shore of Jenny Lake (A. Bove, pers. comm.). Surveys in 1999 and again this year found no evidence of T. natans established at this or any neighboring lakes. At Jackson Lake, substrate surveys took place at the high-use areas of Leeks Marina, Colter Bay, and Signal Mountain boat launch. We inventoried plants within Colter Bay, but since macrophytes were uncommon or not present at both Leeks Marina and Signal Mountain boat launch, two other sites were chosen: a small embayment just west of South Landing and Spaulding Bay. Sampling was cut short due to an imminent thunderstorm, so 79 rake samples were taken at the three sites. The Bureau of Reclamation reportedly sampled the whole lake during one week in July 2008 looking for Eurasian watermilfoil (Myriophyllum spicatum) but did not have funding to sample for other species. Since Jackson Lake is a high-risk waterbody, frequented by recreational users, it is a high priority for future surveys aimed at potential introduced aquatic animal and plant species.

Conclusions and Recommendations We surveyed a total of six lakes and twenty-two popular river access sites using a variety of sampling methods to find both plants and animals in representative suitable habitats, finding none of the target plant or animal species. We found numerous sites with native milfoils (most likely M. quitense, M. sibericum and M. verticillatum), but due to a lack of flowers, could not positively identify many to species. However, none of these stands shared vegetative characteristics with the non-native, widely distributed Eurasian watermilfoil (M. spicatum) nor appeared invasive. Within the last year, Eurasian watermilfoil has been found in Montana, Hydrilla (Hydrilla verticillata) has been confirmed in two areas in Idaho, and zebra mussels (Dreissena polymorpha) and quagga mussels (Dreissena rostriformis bugensis) veligers have been detected in Colorado and in other western states. These aquatic invasive species could inadvertently be spread into Teton County from neighboring areas on boats, trailers, waders, or by aquarium releases. Known vectors for introduction and the proximity of nearby infestations emphasize the need for early detection surveys in high priority sites and for increased awareness among agencies, conservation groups and the public. Early detection surveys are a critical component to managing aquatic resources in high-value habitats. We recommend surveying the remaining priority sites that have already identified and additionally targeting surveys on privately held constructed or natural ponds that may drain to other water bodies. Similar surveys in additional areas and habitats would be a valuable investment in the protection of wildlife, recreational and property values associated with water bodies like the Snake River, Jackson Reservoir, and other water bodies in Teton County.

Teton Co. AIS Surveys 2008

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Figure 1. Lake and river sites surveyed for AIS in July-August 2008

Teton Co. AIS Surveys 2008

5


Table 2. Site-specific species lists. Estimates of abundance include low (L), medium (M) and high (H), and species noted incidentally, but not collected in rake samples, quadrats or ponar grabs are listed (Inc). Site

lat

long

date

Plants

common name

43.9008

-110.6427

8-Aug

Carex sp. Chara sp. Eleocharis sp. Elodea nuttallii Isoetes sp. Limosella aquatica Mentha sp. Potamogeton praelongus Potamogeton pusillus Ranunculus aquatilis Sparganium angustifolium Stuckenia pectinata Chara sp. Eleocharis sp. Isoetes sp. Limosella aquatica Myriophyllum verticillatum Polygonum amphibium Ranunculus aquatilis Stuckenia pectinata Eleocharis sp. Limosella aquatica Polygonum amphibium Potamogeton sp. Ranunculus aquatilis Callitriche hermaphroditica Chara sp. Elodea nuttallii Stuckenia pectinata Myriophyllum sp.

sedge muskgrass spikerush Nuttall's waterweed quillwort awl-leaf mudwort mint white-stem pondweed small pondweed water buttercup narrowleaf bur-reed sago pondweed muskgrass spikerush quillwort awl-leaf mudwort whorl-leaf watermilfoil water smartweed water buttercup sago pondweed spikerush awl-leaf mudwort water smartweed pondweed, thinleaf water buttercup autumn water starwort muskgrass Nuttall's waterweed sago pondweed watermilfoil

Abun

Invertebrates

notes

L L L Inc Inc L Inc L Inc L Inc M L M L L Inc Inc Inc M Inc Inc Inc Inc Inc L L H M Inc

F. Lymnaeidae F. Lymnaeidae F. Physidae F. Planorbidae unknown bivalve Valvata sp.

prob. Stagnicola immature, tentative id

Jackson Lake Colter Bay

West of South Landing

43.8240

-110.6409

9-Aug

Leeks Marina

43.9299

-110.6405

9-Aug

Spaulding Bay

43.8119

-110.6584

9-Aug

Signal Mountain boat launch

43.8383

-110.6167

4-Aug

partial

not sampled

none found

not sampled

F. Lymnaeidae F. Physidae F. Planorbidae

damaged

String Lake Southern portion

43.7831

-110.7328

29-Jul

Middle portion

43.7921

-110.7293

29-Jul

Northern portion

43.7965

-110.7292

29-Jul

canoe launch picnic area

43.7854 43.7887

-110.7312 -110.7318

29-Jul 29-Jul

Teton Co. AIS Surveys 2008

Eleocharis acicularis Isoetes sp. Nupar lutea Potamogeton epihydrus Potamogeton praelongus Sparganium angustifolium Stuckenia pectinata Carex sp. Eleocharis acicularis Isoetes sp. Potamogeton gramineus Sparganium angustifolium Carex sp. Carex sp. (2) Eleocharis acicularis Eleocharis sp. Isoetes sp. Menyanthes trifoliata Potamogeton gramineus Sparganium angustifolium none found none found

needle spikerush quillwort yellow cowlily ribbonleaf pondweed white-stem pondweed narrowleaf bur-reed sago pondweed sedge needle spikerush quillwort grassy pondweed narrowleaf bur-reed sedge sedge needle spikerush spikerush quillwort buck-bean grassy pondweed narrowleaf bur-reed

M L H M L L L L H L L M H L L L L H L L

not sampled

not sampled

not sampled

unknown bivalve F. Lymnaeidae unknown bivalve

not Corbicula not Corbicula

6


Table 2. Site specific species lists (continued) Site

lat

long

date

ferry landing - west

43.7659

-110.7420

11-Aug

ferry landing - east

43.7520

-110.7259

11-Aug

boat launch

43.7500

-110.7298

4-Aug

southern arm

43.8010

-110.7296

30-Jul

portage put-in

43.7983

-110.7273

30-Jul

western portion

43.6287

-110.5414

16-Aug

eastern portion

43.6394

-110.5143

16-Aug

Atherton Creek boat launch

43.6358

-110.5229

16-Aug

outlet area

43.6280

-110.5433

16-Aug

Plants

common name

Potamogeton praelongus Potamogeton sp. Potamogeton gramineus Ranunculus aquatilis Nitella sp. Carex sp. Juncus sp. Mentha arvensis Sparganium angustifolium Isoetes sp. Limosella aquatica F. Asteraceae Ranunculus aquatilis none found

white-stem pondweed pondweed, thinleaf grassy pondweed water buttercup nitella sedge rush field mint narrowleaf bur-reed quillwort awl-leaf mudwort

Carex sp. Eleocharis acicularis Isoetes sp. Potamogeton praelongus Sparganium angustifolium none found

sedge needle spikerush quillwort white-stem pondweed narrowleaf bur-reed

Chara sp. Elodea bifoliata Elodea canadensis Elodea nuttallii Myriophyllum sibericum Myriophyllum sp. Nitella sp. Potamogeton richarsonii Stuckenia pectinata Chara sp. Elodea bifoliata Elodea canadensis Elodea nuttallii Myriophyllum sp. Nitella sp. Potamogeton pusillus Potamogeton richarsonii Stuckenia pectinata Chara sp. Elodea bifoliata Elodea canadensis Elodea nuttallii Myriophyllum sibericum Myriophyllum sp. Potamogeton pusillus Potamogeton richarsonii Stuckenia pectinata none found

muskgrass two leaf waterweed common waterweed Nuttall's waterweed northern watermilfoil watermilfoil Nitella Richardson's pondweed sago pondweed muskgrass two leaf waterweed common waterweed Nuttall's waterweed watermilfoil Nitella small pondweed Richardson's pondweed sago pondweed muskgrass two leaf waterweed common waterweed Nuttall's waterweed northern watermilfoil watermilfoil small pondweed Richardson's pondweed sago pondweed

Abun

Invertebrates

notes

Jenny Lake

water buttercup

h M L M L H M L L M H L L

not sampled

not sampled

none found

Leigh Lake Inc Inc Inc Inc Inc

not sampled

F. Planorbidae F. Physidae

Lower Slide Lake

Teton Co. AIS Surveys 2008

H L L L L M L H L L L M M L L L H H H M L M M M L H H

not sampled

not sampled

F. Lymnaeidae F. Lymnaeidae F. Physidae F. Planorbidae unknown bivalve Valvata sp.

prob. Stagnicola unknown probably Physella probably Gyraulus or not Corbicula

F. Lymnaeidae F. Physidae F. Planorbidae unknown bivalve

prob. Stagnicola

not Corbicula

7


Table 2. Site specific species lists (continued) Site

lat

long

date

Plants

common name

Abun

27-Jul

Chara sp. Najas sp (poss. N. guadalupensis) Stuckenia pectinata

muskgrass water nymph sago pondweed

none found none found Carex sp. Eleocharis sp. Elodea canadensis Equisetum テ様itorale Equisetum fluviatile Fontinalis sp. Lemna minor Myriophyllum sp. (poss. M. quitense ) Ranunculus aquatilis Rumex crispus Sphagnum sp. Stuckenia pectinata Phalaris arundinacea Salix sp. Equisetum sp. Eleocharis sp. Equisetum fluviatile Equisetum テ様itorale Fontinalis sp. Mentha arvensis Myriophyllum sp. (poss. M. quitense ) Potamogeton sp. Eleocharis sp. Equisetum spp.

sedge spikerush common waterweed litoral horsetail water horsetail fontinalis moss common duckweed watermilfoil water buttercup curly dock sphagnum sago pondweed reed canarygrass willow horsetail spikerush water horsetail litoral horsetail fontinalis moss field mint watermilfoil pondweed, thinleaf spikerush horsetail

Inc Inc L Inc Inc L Inc Inc Inc Inc Inc Inc H H Inc Inc Inc Inc Inc Inc Inc Inc Inc Inc

Potamogeton richardsonii Linaria dalmatica Ceratophyllum demersum Isoetes sp. Potamogeton richardsonii Potamogeton sp. Ranunculus aquatilis Fontinalis sp. Carex sp. Ceratophyllum demersum Chara sp. Elodea canadensis Elodea nuttallii Hippuris vulgaris Isoetes sp. Lemna minor Limosella aquatica Mentha sp. Myriophyllum sibericum Myriophyllum verticillatum Polygonum amphibium Potamogeton gramineus Potamogeton praelongus Potamogeton richardsonii

Richardson's pondweed Dalmatian toadflax coontail quillwort Richardson's pondweed pondweed, thinleaf water buttercup fontinalis moss sedge coontail muskgrass common waterweed Nuttall's waterweed common mares tail quillwort common duckweed awl-leaf mudwort mint northern watermilfoil whorl-leaf watermilfoil water smartweed grassy pondweed white-stem pondweed Richardson's pondweed

Inc L Inc Inc Inc Inc Inc L Inc M L M L L L L L Inc L L L M M H

Invertebrates

notes

Kelly Warm Springs 43.63949

-110.61626

H H M

Melanoides F. Planorbidae F. Physidae

Snake River 43.6567 43.6537 43.7115

-110.7136 -110.7140 -110.67087

2-Aug 2-Aug 2-Aug

Alpine Jct.

43.1678

-111.0224

3-Aug

East Table boat launch Elbow boat launch

43.2109 43.2132

-110.8106 -110.7869

3-Aug 5-Aug

Moose @ boat lauch Moose @ bridge Schwabacher Landing

West Table boat launch

43.2050

-110.8209

5-Aug

Deadman's Bar

43.7604

-110.6275

6-Aug

Moran Jct.

43.8397

-110.5150

6-Aug

Pacific Creek Landing Oxbow Bend

43.8455 43.8658

-110.5172 -110.5478

6-Aug 9-Aug

Teton Co. AIS Surveys 2008

none found none found undetermined snails undetermined clam

not Potamopyrgus sp. not Corbicula

F. Lymnaeidae Procambarus clarkia

dead, along shoreline

F. Hydrobiidae F. Lymnaeidae F. Physidae Fluminicola sp. F. Lymnaeidae unknown snail unknown snail

prob. juvenile Fluminicola sp.

F. Lymnaeidae F. Planorbidae unknown bivalve unknown snail unknown snail Valvata sp.

prob. Stagnicola

prob. Stagnicola prosobranch not Potamopyrgus sp.

not Corbicula prosobranch, damaged prosobranch, poss. Amnicola

8


Table 2. Site specific species lists (continued) Site

lat

long

date

Plants

common name

Abun

Oxbow Bend (continued)

43.8658

-110.5478

9-Aug

fern-leaf pondweed curly dock sphagnum sago pondweed

M Inc L M

Wilson - Hwy 22 Hoback Jct.

43.4999 43.3206

-110.8407 -110.7327

10-Aug 11-Aug

Potamogeton robinsii Rumex crispus Sphagnum sp. Stuckenia pectinata none found Equisetum sp.

horsetail

Inc

Fontinalis sp. Myriophyllum sibericum Stuckenia pectinata Myriophyllum sp.

fontinalis moss northern watermilfoil sago pondweed watermilfoil

Inc Inc Inc Inc

Pritchard boat launch

43.29216

-110.79062

11-Aug

South Park boat launch

43.38505

-110.74539

11-Aug

Invertebrates

notes

none found F. Physidae unknown snail F. Lymnaeidae unknown snail

prosobranch, poss. Amnicola not Stagnicola poss. F. Lymaeidae

F. Physidae F. Valvatidae F. Lymnaeidae unknown snail

prob. Stagnicola prosobranch

Fish Creek Fish Creek Ranch

43.48464

-110.87451

12-Aug

Open Canyon Creek * Resor's Bridge

43.61876 43.54796

-110.78912 -110.84626

12-Aug 12-Aug

Spring Creek

43.47005

-110.8692

17-Aug

Wilson

43.50078

Teton Co. AIS Surveys 2008

-110.87177

17-Aug

Elodea canadensis Fontinalis sp. Myriophyllum sibericum Ranunculus aquatilis Stuckenia pectinata F. Lycopodiaceae none found F. Lycopodiaceae Fontinalis sp. Hippuris vulgaris Lemna minor Myosotis scorpioides Myriophyllum sibericum Nostoc Potamogeton pusillus Potamogeton sp. Ranunculus aquatilis Sparganium sp. Stuckenia pectinata Zannichellia palustris Carex sp. Chara sp. Elodea canadensis Hippuris vulgaris Lemna minor Myriophyllum sibericum Myriophyllum sp. Potamogeton sp. Ranunculus aquatilis Stuckenia pectinata Zannichellia palustris Elodea canadensis F. Lycopodiaceae Fontinalis sp. Linaria dalmatica Myriophyllum sp. Ranunculus aquatilis

common waterweed fontinalis moss northern watermilfoil water buttercup sago pondweed unknown clubmoss

L L H L M L

unknown clubmoss fontinalis moss common mares tail common duckweed true forget-me-not northern watermilfoil nostoc small pondweed pondweed, thinleaf water buttercup bur-reed sago pondweed horned pondweed sedge muskgrass common waterweed common mares tail common duckweed northern watermilfoil watermilfoil pondweed, thinleaf water buttercup sago pondweed horned pondweed common waterweed unknown clubmoss fontinalis moss Dalmatian toadflax watermilfoil water buttercup

L L L Inc L M Inc L L L L H L L L L L L L H L M M L H L L L H L

none found

none found unknown bivalve

F. Physidae F. Planorbidae unknown bivalve

F. Physidae F. Lymnaeidae F. Lymnaeidae F. Planorbidae unknown bivalve

similar to Corbicula, but very

not Aplexa; prob. Physa or not Corbicula

very small prob. Stagnicola very small not Corbicula

9


Table 2. Site specific species lists (continued) Site

lat

long

date

Plants

common name

43.8380

-110.5125

6-Aug

Callitriche palustris Carex sp. Eleocharis sp. Elodea canadensis Equisetum spp. Hippuris vulgaris Myriophyllum sp. (poss. M. quitense ) Ranunculus aquatilis

vernal water-starwort sedge spikerush common waterweed horsetail common mares tail watermilfoil water buttercup

27-Jul 27-Jul

Fontinalis sp. none found

fontinalis moss

Abun

Invertebrates

notes

Buffalo Fork River Moran Jct.

Inc Inc Inc Inc Inc Inc Inc Inc

none found

L

none found none found

Pacific Creek Campground FS/NPS boundary

43.93802 43.91777

Teton Co. AIS Surveys 2008

-110.44112 -110.46438

10


Table 3. Water quality measurements from lakes and rivers in Teton County, 2008. Site

lat

long

date

temp (째C)

conductivity (mS)

DO (mg/L)

pH

Depth (m)

Elevation (m)

43.900 8 43.929 9 43.835 9

-110.6427 -110.6405 -110.6368

8-Aug 9-Aug 9-Aug

20.49 19.03 20.33

0.131 0.129 0.130

6.52 7.11 6.74

8.05 8.11 8.09

0.45 1.00 1.00

2065 2065 2065

43.7872

-110.7341

29-Jul

16.65

0.240

7.33

7.38

1.00

2096

43.7523

-110.7291

11-Aug

16.60

0.027

8.17

7.79

1.00

2068

43.8065

-110.7244

30-Jul

16.87

0.023

7.81

7.58

1.00

2099

43.632 2

-110.5319

16-Aug

14.57

0.286

6.50

8.39

1.00

2107

43.6394 9

-110.61626

27-Jul

28.10

0.418

6.70

7.70

0.50

2037

43.1678 43.30137 43.7604 43.2109 43.2132 43.3204 43.3206 43.6567 43.8397 43.8658 43.29216 43.7115 43.38505 43.2050 43.4999

-111.0224 -110.77497 -110.6275 -110.8106 -110.7869 -110.7327 -110.7327 -110.7136 -110.5150 -110.5478 -110.79062 -110.67087 -110.74539 -110.8209 -110.8407

3-Aug 17-Aug 6-Aug 3-Aug 5-Aug 17-Aug 17-Aug 2-Aug 6-Aug 10-Aug 17-Aug 2-Aug 17-Aug 5-Aug 10-Aug

20.64 17.7 15.61 14.73 13.98 14.90 17.66 17.07 13.8 15.22 17.4 13.65 19.66 14.10 15.20

0.255 0.275 0.138 0.222 0.224 0.568 0.191 0.126 0.143 0.139 0.239 0.214 0.199 0.222 0.160

6.64 9.52 8.87 8.99 8.94 8.31 8.40 7.00 9.33 7.10 9.21 6.82 8.18 7.79 8.88

8.21 8.23 6.38 8.22 8.31 8.26 8.44 8.25 8.5 7.93 8.52 8.03 8.42 8.18 8.19

1.00 0.25 0.35 0.35 0.30 0.45 0.20 0.50 0.35 0.25 0.25 0.40 0.30 0.50 0.30

1714 1786 2018 1753 1758 1800 1800 1969 2049 2053 1781 2003 1815 1750 1878

43.4846 4 43.6187 6 43.5479 6 43.4700 5 43.5007 8

-110.87451 -110.78912 -110.84626 -110.8692 -110.87177

12-Aug 12-Aug 12-Aug 17-Aug 17-Aug

15.90 4.71 14.40 12.95 10.45

0.213 0.118 0.221 0.261 0.210

10.33 10.53 8.63 7.55 6.98

8.74 8.11 7.88 7.79 7.74

0.20 0.25 0.30 0.25 0.45

1868 1959 1896 1863 1876

Moran Jct.

43.8380

-110.5125

6-Aug

12.05

0.116

8.45

8.39

0.35

2049

Campground FS/NPS bound ary

43.9380 2 43.9177 7

-110.44112 -110.46438

26-Jul 26-Jul

12.13 17.43

0.158 0.159

7.22 6.29

8.28 8.23

0.50 0.50

2145 2130

Jackson Lake Colter Bay Leeks Marina

String Lake Jenny Lake Leigh Lake Lower Slide Lake Kelly Warm Springs Snake River Alpine Jct. Astoria boat launch Deadman 's Bar East Table boat launch Elbow boat launch Hoback Jct. (Ho back River) Hoback Jct. (Snake River) Moose @ boat lauch Moran Jct. Oxbow Bend Pritchard boat launch Schwabacher Landing Sou th Park boat launch West Table boat launch Wilson - Hwy 22

Fish Creek Fish Creek Ranch Open Canyon Creek * Resor's Bridge Sp ring Creek Wilson

Buffalo Fork River Pacific Creek

Teton Co. AIS Surveys 2008

11


2008 Teton County, Aquatic Invasive Survey