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

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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