Lake Water ChemistryLake Water Chemistry
► PhosphorusPhosphorus
► NitrateNitrate
► SilicaSilica
Chemical InterestsChemical Interests
► Lake ProductionLake Production Levels Often Predict Entire Food WebLevels Often Predict Entire Food Web
► Direct Effects on Spec. Cond., D.O., etc.Direct Effects on Spec. Cond., D.O., etc.
► Biotic CompositionBiotic Composition Direct/Indirect RelationshipsDirect/Indirect Relationships
► Visual EffectsVisual Effects
PhosphorusPhosphorus
► Total PhosphorusTotal Phosphorus
Onondaga Very High Onondaga Very High in Hypo.in Hypo.
Green’s Mono LayerGreen’s Mono Layer
Catlin and Wolf Catlin and Wolf OligotrphicOligotrphic
Total Phosphorus
0
0.5
1
1.5
2
2.5
3
3.5
4
Wolf Onondaga Oneida Green Catlin Arbutus
epi
meta
hypo
chemo
mono
Phos. Cont.Phos. Cont.
Total Dissolved Phosphorus
0
0.5
1
1.5
2
2.5
Onondaga Oneida Green Catlin Arbutus
epi
meta
hypo
chemo
mono
NitrateNitrate
Nitrate Levels
-2-10123456789
1011121314151617181920
0 2 4 6 8 10
mg/L
Dep
th
Wolf
Onondaga
Oneida
Catlin
Green Lake NitrateGreen Lake Nitrate
Green Lake Nitrate Levels
0
10
20
30
40
50
60
0 1 2 3 4 5 6
mg/L
Dep
th Green
Arbutus Lake NitrateArbutus Lake Nitrate
► Mostly Human InputMostly Human Input
► Deeper High Levels Deeper High Levels From Density From Density DifferencesDifferences
► Wolf Lakes Epi Wolf Lakes Epi Levels High From Levels High From RunoffRunoff
Arbutus Nitrate Levels
-1
0
1
2
3
4
5
6
7
8
0 5 10 15 20 25 30
mg/L
Dep
th
Silica ConcentrationsSilica Concentrations
► Concentration Concentration Effects Algal BloomsEffects Algal Blooms
► Occurs From Occurs From Weathering of Weathering of RocksRocks
► Cycle Not As Well Cycle Not As Well Known As OthersKnown As Others
Silica Concetrations
0
5
10
15
20
25
Wolf Onondaga Oneida Catlin Arbutus
uM
epi
meta
hypo
Green Lake SilicaGreen Lake Silica
► Very High Very High Concentrations Concentrations Compared to Other Compared to Other LakesLakes
► Chemo and Mono Chemo and Mono LayerLayer
► Overall DepthOverall Depth
Green Lake Silica Conc.
0
50
100
150
200
250
Green
uM
epi
meta
hypo
chemo
mono
ConclusionConclusion
►Several Factors Effect the Concentrations Several Factors Effect the Concentrations of Chemicals Found Within a Lake.of Chemicals Found Within a Lake. CatchmentCatchment Physical FeaturesPhysical Features PaleolimnologyPaleolimnology Anthropogenic InfluencesAnthropogenic Influences
►Each of These Factors Then Effects The Each of These Factors Then Effects The Rest of The lakes Biotic and Abiotic Rest of The lakes Biotic and Abiotic FeaturesFeatures
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