Koontz, J., D.G. Huggins, C.C. Freeman, D.S. Baker - Central Plains ...

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Table of Contents Abbreviations ..............................................................................................................................4 Executive Summary ....................................................................................................................5 Background .................................................................................................................................5 Introduction ................................................................................................................................6 Methods ......................................................................................................................................7 Site selection ...........................................................................................................................7 Field methods ..........................................................................................................................8 Macroinvertebrates ..................................................................................................................9 Disturbance Assessment ........................................................................................................ 10 The Assessment ................................................................................................................. 10 Wetland Attributes ............................................................................................................. 11 Reference Indicators .......................................................................................................... 12 Disturbance ........................................................................................................................ 13 Results ...................................................................................................................................... 14 Explanation of statistical analyses and graphical representations ............................................ 14 Floristic Quality Assessments ................................................................................................ 15 In situ water quality ............................................................................................................... 20 Depth measures ..................................................................................................................... 21 Nutrient Analyses .................................................................................................................. 22 Nitrogen ............................................................................................................................. 24 Phosphorus ........................................................................................................................ 26 Carbon ............................................................................................................................... 27 Herbicides ............................................................................................................................. 29 Comparisons between Phase I and II studies of the lower Missouri River floodplain wetlands .. 30 Introduction and Background Information ............................................................................. 30 Floristic Quality Assessment Results ..................................................................................... 31 Plant Richness - All Species ............................................................................................... 32 Plant Richness - Native Species ......................................................................................... 33 Spatial attributes .................................................................................................................... 34 Wetland area ...................................................................................................................... 34 Depth to Flood ................................................................................................................... 35 Mean Depth and Maximum Depth ..................................................................................... 36 Water quality ......................................................................................................................... 38 Dissolved oxygen ............................................................................................................... 38 Turbidity ............................................................................................................................ 38 Carbon ............................................................................................................................... 40 2 of 84
Nitrogen ............................................................................................................................. 41 Phosphorus ........................................................................................................................ 44 TN:TP ratio ........................................................................................................................ 45 Chlorophyll-a ..................................................................................................................... 46 Specific Conductance ......................................................................................................... 48 Herbicides .......................................................................................................................... 50 Resampled sites ..................................................................................................................... 52 Disturbance Assessment ........................................................................................................ 54 Macroinvertebrate MMI ........................................................................................................ 56 Metrics ............................................................................................................................... 56 a priori Groups and Metric Selection .................................................................................. 58 Metric Testing .................................................................................................................... 59 The Macroinvertebrate Multiple Metric Index (MMI) ........................................................ 66 MMI in Relation to Other Measures ................................................................................... 70 Differences in Wetland Types ............................................................................................ 71 Wetland Types and MMI Scores ........................................................................................ 72 MMI Result Conclusions ................................................................................................... 74 References ................................................................................................................................ 75 Appendix A. Goals and objectives of EPA Award R7W0812. .................................................. 78 Appendix B. Study sites for Phase II. ....................................................................................... 80 Appendix C. Laboratory measurements and analyses. .............................................................. 83 Appendix D. Disturbance assessment scoring form. ................................................................. 84 3 of 84
Page 1: Assessment of Floodplain Wetlands o
Page 5 and 6: Executive Summary This project soug
Page 7 and 8: other wetland parameters and assess
Page 9 and 10: quality of plant community, respect
Page 11 and 12: was inevitable, but care was taken
Page 13 and 14: Evidence that waterfowl and/or amph
Page 15 and 16: Floristic Quality Assessments Flori
Page 17 and 18: FQAI ALL 30 25 20 15 10 5 0 Figure
Page 19 and 20: MEAN CONSERVATISM ALL 6 5 4 3 2 1 0
Page 21 and 22: Mean Conductivity mS/cm 0.6 0.5 0.4
Page 23 and 24: Table 7). The wide range of values
Page 25 and 26: Nitrogen - N mg/L Total Nitrogen mg
Page 27 and 28: N:P ratio 30.0 24.0 18.0 12.0 6.0 0
Page 29 and 30: Chlorophyll a ug/L 200 180 160 140
Page 31 and 32: wetlands, respectively. Macroinvert
Page 33 and 34: from analysis did not show signific
Page 35 and 36: major wetland classes when ANOVA an
Page 37 and 38: measurement. There are sites within
Page 39 and 40: measurements, turbidity was conside
Page 41 and 42: TOC mg/L TOC mg/L 16 14 12 10 8 6 4
Page 43 and 44: Nitrate:Ammonia Ratio Phase II Tota
Page 45 and 46: CDF 100 90 80 70 60 50 40 30 20 10
Page 47 and 48: was true for organic nitrogen (R 2
Page 49 and 50: Figure 34. Error bar plots of mean
Page 51 and 52: and deethylatrazine were both prese
Page 53 and 54:
suspected that differences in sampl
Page 55 and 56:
Figure 38. Cumulative distribution
Page 57 and 58:
Table 11. Metrics used in the devel
Page 59 and 60:
tested: Percent Clingers (+) (p=0.0
Page 61 and 62:
CDF Figure 42. Cumulative distribut
Page 63 and 64:
Total Nitrogen mg/L Mean Conductivi
Page 65 and 66:
Percent Hydroptilidae = 1.463766 +
Page 67 and 68:
Table 14. Descriptive statistics fo
Page 69 and 70:
MMI Scores 100 90 80 70 60 50 40 30
Page 71 and 72:
ecoregions. Mean pH was also found
Page 73 and 74:
MMI Scores UB Wetland Type MMI Scor
Page 75 and 76:
Acknowledgements Field crew members
Page 77 and 78:
Smith, L.M., N.H. Euliss, D.A. Wilc
Page 79 and 80:
a. Land and soils coverage maps. b.
Page 81 and 82:
Code Phase Longitude Latitude Site
Page 83 and 84:
Appendix C. Laboratory measurements
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Koontz, J., D.G. Huggins, C.C. Freeman, D.S. Baker - Central Plains ...

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