1 Introduction Sediments are chemically heterogeneous. Transfer - - PowerPoint PPT Presentation

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1 Introduction Sediments are chemically heterogeneous. Transfer - - PowerPoint PPT Presentation

May 21, 2023 106 likes •222 views

We t E We t E c osyste m c osyste m Re se a rc h Gro up Re se a rc h Gro up Multi-Element Analysis of Riparian Sediments in ND Aida Asgary, Marinus L. Otte, Donna L. Jacob Wet Ecosystem Research Group Biological Sciences Department 1

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Multi-Element Analysis of Riparian Sediments in ND

Aida Asgary, Marinus L. Otte, Donna L. Jacob Wet Ecosystem Research Group Biological Sciences Department

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We t E c osyste m

Re se a rc h Gro up

We t E c osyste m

Re se a rc h Gro up

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Introduction

  • Sediments are chemically heterogeneous.
  • Transfer nutrients, metals and organics.
  • Sediment fingerprinting method: chemical and physical properties of the

transported sediment reflect those of the source.

2 Sediment depositions , Missouri River, ND Sediment deposits Sediment deposits

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Introduction

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Red Little Missouri Missouri James Sheyenne Red Little Missouri Missouri James Sheyenne Land cover, geology, pH, turbidity and sediment-water chemistry impact the variations and distributions in plant communities.

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Purpose of Riparian Study

  • Study and survey the element distribution and patterns at the rivers and

riparian sediments in North Dakota.

  • Investigate links between land use activities in the region and the current

conditions of the wetlands.

  • Address the tributaries and sources that contribute the most to the

concentrations of particular elements.

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Study Area and Sampling (2011)

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D A B C D A A A A B B B B C C C C D D D A A A A B B A B B B C C C C D C D D D D A A A A A B B B B B C C C C D C D D D D

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200 400 600 800 1000 1200 1400 1600 1800 2000 200 400 600 800 1000 1200 1400 Ca(µmol/g) Mg (µmol/g) Red Sheyenne Jemes Missouri Little Missouri

Significant variations in element concentrations between the Rivers, ND

Results 2011

  • Out of the 56 elements, 47 showed

statistically significant difference (p-value≤ 0.001) between the rivers!

  • Red, James and Sheyenne Rivers are

similar in concentrations for 24 elements

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Significant variations in particle size (f<63µm) between the River s, ND

Results 2011

10 20 30 40 50 60 70 80 90 100 Little Missouri Missouri James Sheyenne Red Particle size (%f<63µm)

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Percentage contribution of Sheyenne and Turtle to the cadmium and selenium concentrations at the Red River

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Results 2012

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Cd(µmol/g) Se(µmol/g) Sheyenne Turtle

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Conclusion

  • This study have shown that there is a considerable variation in element

concentrations in the sediments of the Red, Sheyenne, James, Missouri and Little Missouri.

  • Geology and land use in the area could be the possible factors impacting

variations.

  • Tributaries showed significant contributions, and element-fingerprinting

method could be applied for the sediment source tracing.

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Acknowledgments

Funding:

  • EPA project FAR 0017348.
  • ND INBRE: National Center for Research Resources (5P20RR016471-12),

National Institute of General Medical Sciences (8 P20 GM103442-12) from the National Institutes of Health.

  • Advisors:

Marinus Otte, Donna Jacob

  • Grad Students:

La Toya Kissoon, Alex Yellick, Carrie Werkmeister-Karki, Alex Stalboerger. Khurram Sheikh

  • Undergrad Students:

Ryan Sullivan, Emily Fischbach, Hannah Passolt, Candace Craft, John Schmidt, Alex Hoehle, Aude Monthean. Nicholas Peterson, Yiqing Xu, Bryan Marquardt

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