lake superior - us epamarsden).pdfphoto credit: john marsden, environment canada, 2002 state of lake...
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1
Lake Superior
State of Lake SuperiorPresented by: John Marsden
Environment Canada
photo credit: John Marsden, Environment Canada, 2002
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photo credit: John Marsden, Environment Canada, 2002
State of Lake Superior
OutlineOutlineWatershed and land useWatershed and land useBiological integrity issuesBiological integrity issuesIndicator updateIndicator updateEmerging issuesEmerging issuesBinationalBinational Program and the Program and the LakewideLakewideManagement PlanManagement PlanAcknowledgementsAcknowledgements
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Biological Integrity Issues
Endangered species
Non-native species
Habitat fragmentation
Chemical impacts
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Endangered SpeciesFourteen Lake Superior species are listed nationally by Canada and the U.S. as endangered (3), threatened (6) or vulnerable (5) 400 species in the basin listed by provincial or state jurisdictions as endangered, threatened or of special concern.
Nearly 300 of these are plants.
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Non-Native Species
Wetland plants
Aquatic plants
Terrestrial plants
Aquatic species
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photo credit: Karen Holland , US Environmental Protection Agency, Saginaw Bay Lake Huron
purple loosestrifepurple loosestrife
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photo credit: a field guide to aquatic exotic plants and animals, Minnesota Sea Grant
Eurasian water milfoil
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photo credit: Ontario Ministry of Agriculture and Food
leafy spurge
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photo credit: Theodore G. Scott, Virginia Native Plant Society.
garlicmustard
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photo credit: Ontario Ministry of Agriculture and Food
buckthorn
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photo credit: Penn State - College of Agricultural Sciences, School of Forest Resources
non-native honey suckle
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knapweed
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photo credit: Great Lakes Sea Grant Network Exotic Species Graphics Library
sea lamprey
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rainbow smelt
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zebra mussel (Dreissenapolymorpha)
• Harbors and sheltered bays
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round goby (Neogobius melanostomus)tubenose goby (Proterorhinusmarmoratus)
round goby tubenose goby
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ruffe (Gymnocephalus cernuus)
Lake Superior – west halfLake Huron – at Alpena, MI
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threespine stickleback (Gasterosteus aculeatus)
•Marquette Harbor•Black Bay•MN, WI, MI tributary estuaries
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Non-Native Species (2)
Like Extinction, introduction is forever
persistent biological pollutionstill uncertain of all possible associated impacts
Need to integrate the results of biological indicators
requires a multi-disciplinary; multi-jurisdictional responsefocused, systematic monitoring
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Habitat Fragmentation and Alteration
Need to address changing landscape patterns in terrestrial systems
Build an understanding of physical processes and historic dynamics
then begin to understand natural thresholds
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Forest FragmentationHighIntermediateLow
University of Minnesota
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Chemical Contaminants
Chemical contaminants impact Biological Integrity in Lake Superior in many ways: e.g.
Individual SpeciesHabitat Human Health
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Chemical Contaminants (2)
Possible impacts include:changes to predator/prey relationship gaps in form and function in the ecosystem reduced reproductive capacity
While Status and Trend indicators are important, there is a need to link indicators to decision making
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Chemical Contaminants (3)
Need remediation and source reduction activity
Expand monitoring programs for sources and ecosystem (e.g. track mercury emissions from coal fired power plants as well as heavy metal contamination in western Lake Superior)
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Lake Superior Public Attitude -Household Trash Burning
2000-2001 Survey Questions
1. Do you burn household garbage?
2. Do you know someone else who does?
3. Would you stop burning if you knew that burning garbage had significant negative effects on the environment and human health?
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Indicator Update
Land and Land Use IndicatorsUrban DensityEconomic Prosperity
Nearshore & Open Water IndicatorsPhosphorus Concentrations and Loadings Contaminants in Colonial Nesting Waterbirds
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0
5
10
15
20
25
1970 1975 1980 1985 1990 1995 2000
TP
(u
g/L
)Average Phosphorus Concentrations in Lake Superior
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PCBs in Herring Gull eggs –Lake Superior, 1974 - 2000.
1
1 0
1 0 0
1974
1976
1978
1980
1982
1984
1986
1988
1990
1992
1994
1996
1998
2000
Agawa Rks.
1
1 0
1 0 0
O bse rve d P redic te d Granite I.
log
ug/g
, wet
wei
ght
DATA SOURCES: Environment Canada, D.V. Weseloh
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Mercury in Herring Gull eggs -Lake Superior, 1973-2000.
0
0 .2
0 .4
0 .6
0
0 .2
0 .4
0 .6
1973
1975
1977
1979
1981
1983
1985
1987
1989
1991
1993
1995
1997
1999
Granite I.
Agawa Rks.
ug/g
, wet
wei
ght
Year
DATA SOURCES: Environment Canada, D.V. Weseloh
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Emerging Issues
Global issues:global warming - water levels, temperature, increased contaminant cycling ozone depletion, greater UV exposure to organisms and increased phototoxicity of PAH compounds
Regional/basin issues:increased # of non-native species caused by increased shipping/ballast water exchangePBDEs, Pharmaceuticals and Endocrine disrupting substances, HPCs, PFOs, DiphenylEthers, Plasticizerswater export
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Habitat restoration and the development of broad ecosystem goals A continuing decrease in concentrations of nine critical pollutants; met year 2000 goal of reducing mercury emissions by 60% Almost complete restoration of the lake trout populationMercury collection and recyclingreports available online at: http://www.epa.gov/glnpo/lakesuperior/
Lake Superior Binational Program
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14
AcknowledgementsRonald Rossman, Janet R. Keough - USEPADeb Swackhammer - University of MinnesotaCarri Lohse-Hanson, Judy Crane, Patti King - Minnesota Pollution
Control AgencyMelanie Neilson, Scott Painter, Chip Weseloh, Darrell Piekarz -
Environment CanadaTom Crow - North Central Forest Experimentation StationBill Meades - Natural Resources CanadaJan Shultz - US Forestry ServiceCarl Richards - Minnesota Sea Grant College ProgramKory Groetsch - Great Lakes Indian Fish and Wildlife CommissionMark P. Dryer & Gary Czypinski - USFWS-Ashland Fishery Resources
OfficeDouglas A. Jensen - Minnesota Sea Grant Program
Lake Superior Binational Program
photo credit: John Marsden, Environment Canada, 2002