Presentation on theme: "Cold Water Habitat Evaluation Gilbert Creek & Elk Creek June – August 2005 Matthew D. Rasmussen Applied Science Undergraduate UW-Stout Menomonie, WI 54751."— Presentation transcript:
Cold Water Habitat Evaluation Gilbert Creek & Elk Creek June – August 2005 Matthew D. Rasmussen Applied Science Undergraduate UW-Stout Menomonie, WI 54751
Methods Biological Information collected using Hobart H-10 Multimeter pH, conductivity, turbidity, dissolved oxygen, and salinity Continuous Onset TidBit Temperature Loggers Collected water temperature every 30 minutes Nitrogen & Phosphorus concentrations utilizing HACH Kit Compare results to USEPA standards E.coli & Coliform testing Compare results to Wisconsin code NR 102.04 Water velocity using Global Waters FP-101 Flow Probe Chlorophyll content in algae ASTM D3731-87 Study to analyze phosphorus trend in Elk Creek
Findings - E.coli and Coliform levels are high - Levels are not to exceed 4 per mL - Correlate to rain fall
-Self-Sustaining buffer! -Presence of salinity buffers pH -May influence microbial species -Excellent environment to sustain brook trout
Macroinvertabrate quality increases as quality of habitat increases. This is easily seen by the Biotic Index South branch = scuds Middle branch = scuds North branch = mayflies, caddis flies The North branch water quality & habitat is clearly the ideal habitat for brook trout in Gilbert Creek **Data was obtained by Bio-135 Students, end of Sept. 2005** Branch of CreekSimpson's Index of diversity(1-D) WAV Biotic Index South.61 2.0 (poor) Middle.63 2.2 (fair) North.81 2.8 (good)
Sediment Characteristics Site Sediment DepthDescription (meters) GC-A< 1Silt GC-B0.20Silt GC-C (2003)0.13Sand/Silt GC-D (2004)0.38Pebbles/Sand GC-E0.53Sand GC-F0.81Silt Sediment depth lowest in 2003 2004 restoration sites. Spawning habitat more abundant in sites C and D Sediment Quality correlated to biotic index Restoration provides results!
-E. coli and Coliform levels are high -Levels are not to exceed 4 per mL -Correlate to rain fall
-No salinity = No buffer -Ground water infiltration creates an increase in pH over time -Rain fall has greater effect on water
Sediment Characteristics Quality of habitat increases down stream Restoration done above site G in 1999 Sediment Quality relates to biotic index Site Sediment DepthDescription (meters) EC-G0.46Silty Muck EC-H0.43Sand/Pebbles EC-I0.66Sand EC-J0.18 Rocks/pebbles (Ideal!!)
Water quality increases downstream, thus biotic index increases EC-G contains muddy sediment & slow moving water. Mainly scuds & tubifex EC-J is fast moving with riffles and pools. Contains a rocky sediment and habitat for trout. Mainly caddisflies and stoneflies Site Location Simpson's Index of diversity(1-D ) WAV Biotic Index EC-G.8352.0 (poor) EC-H.6602.25 (fair) EC-I.6142.5 (fair) EC-J.8422.8 (good)
Nitrogen (mg/L) DateECGECHECIECJ 21-Jun0.921.80 1.50 28-Jun0.350.860.840.96 5-Jul0.820.940.980.96 12-Jul0.400.960.780.62 19-Jul0.660.770.870.72 26-Jul0.230.370.660.88 2-Aug0.251.000.961.00 9-Aug0.200.340.560.36 16-Aug0.220.380.460.58 23-Aug0.500.840.420.62 30-Aug0.380.860.901.00 Phosphorus (mg/L) DateECGECHECIECJ 21-Jun6.673.332.832.33 28-Jun13.5011.509.008.20 5-Jul13.809.507.508.00 12-Jul17.509.008.508.00 19-Jul18.007.5011.008.00 26-Jul16.0015.009.007.00 2-Aug17.008.00 7.00 9-Aug16.508.507.006.50 16-Aug15.008.007.006.50 23-Aug18.009.008.007.00 30-Aug17.0019.009.007.50 N & P Concentrations in Elk Creek
Chlorophyll Concentration by Site N & P Trend Upstream to Downstream -Data averaged over course of summer -Decrease in Phosphorus downstream -Possible Chlorophyll explanation? -Nitrogen loading between EC-G & EC-H? -Standard Practices for Measurement of Chlorophyll Content in Algae in Surface Waters (ASTM D3731-87) -Algal Cells not responsible -Some other mechanism, periphyton?
Conclusions Gilbert Creek Data shows improvement in spawning habitat and invertebrate diversity in restored areas E.coli and Coliform levels being introduced to the creek are high. This is detrimental to the success of this trout stream.
Conclusions Elk creek Invertebrate diversity represents water quality and aquatic habitat quality. (Site J-most downstream) N and P issues of concern E.coli and Coliform levels are exceedingly high. Especially during rainfall events
Acknowledgments Wisconsin Department of Natural Resources Ojibleau Chapter Trout Unlimited University of Wisconsin-Stout Biology City of Menomonie, Waste-Water Treatment Facility Biology 135 Students, Fall 2005 Steve Nold, Department of Biology Martin Ondrist, Department of Chemistry