Alexander J. Smith, Barry P. Baldigo, Mike R. McHale New York State Department of Environmental...
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Assessing the effects of Hurricane Irene on benthic macroinvertebrate communities in
the Upper Esopus CreekAlexander J. Smith, Barry P. Baldigo, Mike R.
McHale
New York State Department of Environmental Conservation
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OutlineProject Background
“Quantitative Assessment of Water Quality in the Upper Esopus Creek: fish, macroinvertebrates, periphyton, turbidity and nutrients”
Response to Hurricane Irene
Current Results
Next steps
New York State Department of Environmental Conservation
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Upper Esopus Creek ProjectObjectives
Assess water quality and identify sources of: Turbidity Nutrients
Quantify the impacts of: Shandaken Portal Village of Phoenicia (septic systems) Turbidity and Nutrients
Methods 20 sites in August 2009, 2010, and 2011 Biological communities Water chemistries and discharge
New York State Department of Environmental Conservation
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Precipitation
August 29
August 28
New York State Department of Environmental Conservation
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Hurricane Irene FloodingFlood recurrence
interval was 100-500 years
Irene ~ 80,000 cfsAve. ~ 300 cfs
One of the worst in recorded history for the Esopus Creek drainage
Irene
Lee
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Pre-Irene Post-Irene
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New York State Department of Environmental Conservation
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Sampling Month
Aug-2009 Aug-2010 Aug-2011 Sept-2011 Nov-2011
Bio
logi
cal A
sses
smen
t P
rofil
e S
core
(B
AP
)
0.0
2.5
5.0
7.5
10.0Non-impacted
Slightly Impacted
Moderately Impacted
Severely Impacted
Condition Assessment - BAP
Multimetric Spp. RichnessEPT RichnessBiotic IndexModel Affinity
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Sampling Month
Aug-2009 Aug-2010 Aug-2011 Sept-2011 Nov-2011
Spe
cies
Ric
hnes
s
0
10
20
30
40
50
Sampling Month
Aug-2009 Aug-2010 Aug-2011 Sept-2011 Nov-2011
Hils
enho
ff's
Bio
tic I
ndex
(H
BI)
0
2
4
6
8
10Sampling Month
Aug-2009 Aug-2010 Aug-2011 Sept-2011 Nov-2011
May
fly/S
tone
fly/C
addi
sfly
Ric
hnes
s (E
PT
)
0
5
10
15
20
25
Sampling Month
Aug-2009 Aug-2010 Aug-2011 Sept-2011 Nov-2011
Per
cent
Mod
el A
ffin
ity (
PM
A)
0
20
40
60
80
100
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Sample Processing Effort
Sampling Month
Aug-2009 Aug-2010 Aug-2011 Sept-2011 Nov-2011
Per
cent
of
Sa
mpl
e S
orte
d
0
20
40
60
80
100
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Transform: Log(X+1)Resemblance: S17 Bray Curtis similarity
MonthAugNovSept
Similarity20
2D Stress: 0.21
Community Structure
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Transform: Log(X+1)Resemblance: S17 Bray Curtis similarity
Acentrella turbida
0.4
1.6
2.8
4
AugAug
Nov
Sept
Aug
Aug
Nov Sept
Aug
Aug
Nov Sept
Aug
Aug
NovSept
Aug
Aug
Aug
Nov
Sept
Aug
Aug
AugNov
Sept
Aug
Aug
AugNov
Sept
AugAug
Aug
Nov
Sept
AugAugAug
Nov
Sept
AugAug Aug
Nov
Sept
AugAugAug
Nov
Sept
AugAug
Aug
Nov Sept
AugAug Aug
Nov
Sept
AugAug
Aug
Nov
Sept
AugAug Aug
Nov
SeptAugAug
Aug
Nov
Sept
AugAug
Aug
Nov
Sept
AugAugAug
NovSept
Aug
AugAug
Nov Sept
AugAugAug
NovSept
2D Stress: 0.21
Transform: Log(X+1)Resemblance: S17 Bray Curtis similarity
Baetis flavistriga
0.3
1.2
2.1
3
AugAug
Nov
Sept
Aug
Aug
Nov Sept
Aug
Aug
Nov Sept
Aug
Aug
NovSept
Aug
Aug
Aug
Nov
Sept
Aug
Aug
AugNov
Sept
Aug
Aug
AugNov
Sept
AugAug
Aug
Nov
Sept
AugAugAug
Nov
Sept
AugAug Aug
Nov
Sept
AugAugAug
Nov
Sept
AugAug
Aug
Nov Sept
AugAug Aug
Nov
Sept
AugAug
Aug
Nov
Sept
AugAug Aug
Nov
SeptAugAug
Aug
Nov
Sept
AugAug
Aug
Nov
Sept
AugAugAug
NovSept
Aug
AugAug
Nov Sept
AugAugAug
NovSept
2D Stress: 0.21
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ConclusionsAlthough significant impacts to diversity, the
Upper Esopus is a resilient system
Water quality assessment not necessarily the best indicator of recoveryMultivariate ordination of community data
shows a more complete picture
Monitoring is complete, full analysis and work up by spring/summer 2013