macro and microplastics: st louis river estuary and lake...
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Macro and Microplastics: St Louis River Estuary and Lake Superior.
Dr. Lorena M. Rios Mendoza
Cera Johnson, Maryelle Nyeck Nyeck
University of Wisconsin-Superior
Department of Natural Sciences /Chemistry
6th International Marine Debris Conference
San Diego, CA 2018
•Endocrine disruptors
POPs are stable
chemically. They are
lipophilic (oil attracting)
and accumulate in the
food chain.
•Man-made compounds
Sorption from environment
Additive chemicals
Lake Superior
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
Interstate Island
Hearding Island
M1
M2
M3M11
M4
M5
M6
M7
M8
M9
M10
M12
M13
M14 M15
M16
M17
Effluent water WWTP (5)
Manta trawl (17)
Beach (100m and 1m2) (7)
Summer 2016
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
Collecting microplastic samples
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
Samples
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
Beach (1 m2)Surveys
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
HeardingIsland
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
Water sample outside to the WWTPDuluth, MN
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
Water sample outside of the WWTP-DuluthMICROPLASTICS
PE
PE
PP
PE
Some examples of microplasticsdetected in St. Louis River Estuary from this WWTP
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
Effluent water inside to the WWTP
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
FTIR Micro Spectrometer
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
FTIR Micro Spectrometer
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
Stewart River
French River
Lester River
St Louis River
Nemadji River
Middle River
Amnicon River Poplar River1
23
12
11
109
8
76
54
Creeks:
1. Faxon
2. Bluff
3. Bear
4. Kingsbury
5. Keene
6. Merritt
7. Miller
8. Buckingham
9. Chester
10.Tisher
11.43rd Avenue East
12.Amity
Summer 20179 Rivers
Lake
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
Collecting samples Summer-2017
Faxon Creek
Knife River
Lake Nebagamon
Merrit Creek
Middle River
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
44 samples11 sediments33 manta trawls
11 sediments no visible
plastic particles
13 manta samples no
visible plastic particles
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
North Pacific Gyre-2014
35% pyrogenic15% petrogenic50% mixture
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
• Microplastic debris is a new source of POPs with unknown consequences in the environment in the Pacific Ocean and the Great Lakes.
• Plastics debris is confused by natural food and ingested by aquatic organisms (fish-fibers)
Conclusions
Questions:
• How fast is the desorption of the POPs?
• What is the significance of this new source of POPs?
• How is the food web affected? And ultimately the human health?Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
PLASTIC TEAM
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
QUESTIONS?
St. Louis River Estuary
THANK YOU VERY MUCH!!!
Ecofootprint (Enbridge grant 2016 and 2017)Lake Superior National Estuarine Research ReserveUniversity of MichiganUniversity of Wisconsin Superior- Faculty Development grantDepartment of Natural Sciences-grant
Dr. Lorena M Rios Mendoza. University of Wisconsin Superior. lriosmen@uwsuper.edu
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