1. 1 Water chemistry and nutrient cycling in tributaries of Lake Superior Amy Marcarelli Department of Biological Sciences 17 March 2014 Photos by A. Marcarelli or C. Huckins unless otherwise noted

2. 2 Coble et al. in review, J Geophy Res - Biogeosci

3. Stream Ecosystem Ecology @ Michigan Tech 3 Stream – GREAT Lake interactions Year-round stream biogeochemistry – what happens under all that snow? A. Coble http://marcarelli-lab.bio.mtu.edu/

4. Monitoring Ecosystem Functions Nutrient cycling Material retention Metabolism

5. Nutrient spiraling Uptake Length (S w ) Uptake Velocity (V f ) Areal Uptake Rate (U)

6. Calumet and Wallace Lake – long term monitoring 6 http://www.nwss.mtu.edu/sites.html For information on long-term data: Dr. Robert Stottlemyer jrstottl@mtu.edu

7. 7 Over the last 25 years at the Wallace watershed on Isle Royale, snowmelt has occurred more rapidly earlier in the growing season, resulting in less infiltration and higher runoff (A), concomitant with higher DOC concentrations in stream water (B). For information on long-term data: Dr. Robert Stottlemyer, jrstottl@mtu.edujrstottl@mtu.edu

8. 8 Year-round measurements of nutrient uptake in a snowmelt-driven stream A. A. Coble, A. M. Marcarelli, E. S. Kane

9. Summer Winter Does in-stream processing of N occur in winter? Yes, Uptake Occurs in Winter Beneath Ice & Snow Coble et al. in prep, Ecology

10. 10 Restoration of the Salmon Trout River, and mechanistic linkages between in-stream fine sediment and fluvial fish Casey Huckins, Amy Marcarelli PhD Students: Ashley Coble, Tony Matthys

11. around 1900: ~ over 100 coaster populations (Newman et al. 1999). Lake Nipigon Lake Superior Nipigon Area Salmon Trout River Tobin Harbor Siskiwit Bay Currant River Pancake River Now: scattered remnant populations (Hansen 1994), with small numbers (Huckins, et al. 2008)

12. Calumet 0.003 m 3 s -1 Little Huron 0.047 m 3 s -1 Big Pup 0.078 m 3 s -1 Salmon Trout 0.786 m 3 s -1 E. Br. Huron 0.180 m 3 s -1 Little Garlic 0.098 m 3 s -1

13. Fish Abundance (2004-2012) Huckins et al. in prep

14. Salmon Trout River water quality monitoring, 2010-2014 14 Marcarelli & Huckins unpublished

15. Nitrogen Uptake ns 2012 ns 2013 Coble et al. in prep – Limnol. Oceanogr.

16. 16 Monitoring stream ecosystem function responses to stamp sand stabilization in Hills Creek Collaborators: Casey Huckins, Gina Nicholas (Houghton-Keewenaw Conservation District), Rob Aho (USDA-NRCS) Students: Ashley Coble, James Olson, Tony Matthys Functions to be monitored: Nutrient uptake Particulate and dissolved retention Nutrient uptake Organic matter transfer to fishes

17. 17 Map of the study streams; underlying imagery from July 2013. Note the large deposits of red-brown sand along Hills Creek and absence of similar deposition from Black Creek and the Gratiot River. Inset show the location of the study area relative to Lake Superior. Gratiot River Hills Creek Black Creek

18. 18 Organic matter transfer to fishes Coarse particulate organic matter retention Retention of dissolved materials in transient storage Nutrient uptake via nutrient spiraling techniques

19. 19 Ammonium uptake velocity measured using nutrient injections in study streams. The only reach with undetectable nutrient uptake in August 2013 was one dominated by stamp sands on Hills Creek. Marcarelli, Huckins et al. unpublished

20. 20 Questions? ammarcar@mtu.edu http://marcarelli-lab.bio.mtu.edu/ Photos by A. Marcarelli or C. Huckins unless otherwise noted

21. Name of Academic Institution Person Presentin g Type of Monitoring Data (e.g., water quality, sediment sampling, species census, etc.) Location(s) Where Data Collected Time Period Data Collected Data Available Online? (provide web address) Michigan Tech Amy Marcarell i, Water chemistry and nutrient cycling in tributaries of Lake Superior Various streams in Houghton, Keweenaw, Marquette counties One historic dataset for 1980 - current; others 2011-2014 Not currently 21