final presentation - multivariate methodology assessment ......final presentation - multivariate...
TRANSCRIPT
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Multivariate Methodology Assessment
Final Report on the Mission and Aransas Rivers
James TolanJames Tolan
Janet Nelson
TPWD – Coastal Fisheries
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Scope of Work
• Physicochemical measurements
• Water and sediment quality
• Flow measurements
• Nekton and benthic sampling
• Instream and riparian habitat
classification
• Land cover classification
Biological
Physical Chemical
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Assessment Methodology
• Multivariate, community-based
– Resemblance matrix
• Highly visual techniques • Highly visual techniques
– Cluster Analysis, MDS, PCA
• Analysis based on bootstrap permutations
– ANOSIM, SIMPER, RELATE
Biological
Physical Chemical
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G
Theoretical MD S – Imp aired
Waterbody
Transform: Square root
Resemblance: S17 Bray Curtis similarity
Stream A
B
C
F
E
2D Stress: 0.1
High
G
H
Intermediate Exceptional
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Geographic Setting
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Segment 2001
- 1 permitte d discharger into the
Tida l Segment,
- 2 permitte d dischargers above
th e Tida l Segment
Missio n River
1 = Upper
2 = Middle
3 = Lower
AL U - Presume d High
Fully Supportin g for D.O.
Non-Supportin g for Rec.
Contact - Bacteria
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ss on
Mission 1
Mi i 2Mission 2
Mission 3
Upstream Downstream
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Segment 2003
- 4 permitte d dischargers
al l wel l Upstream
- 5 permitte d dischargers belo w the
Tida l Segment vi a Chiltipi n Creek
Aransas River
1 = Upper
2 = Middle
3 = Lower
AL U - Presume d High
Fully Supportin g for D.O.
Non-Supportin g for Rec.
Contact - Bacteria
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ransas
Aransas 1
A 2Aransas 2
Aransas 3
Upstream Downstream
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Wastewater Outfalls
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Me
an
alin
ity
(PS
U)
M-A Study = Drought
Sa
linity (
PS
U)
30
40
50
60
Spring Summer Fall Spring Summer Fall
Me
an
S
0
10
20
Mission River (MR 1)
Aransas River (AR 1)
2008 2009
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Water Colum n Profiles (Surface)
2
4 Station MR 1
MR 2
MR 3
AR 1
AR 2
AR 3
Avg DO mg/L
Secchi MR 1
MR 2
AR 3
2D Stress: 0
PCA Analysis MDS Means Plot
-4 -2 0 2 4
PC1
-4
-2
0
PC
2
Avg Temp
Avg pH
Avg Salinity
MR 3
AR 1
AR 2
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DataS onde Deployments
MR 1
AR 2
MR 3
2D Stress: 0.01
2
4 Station MR 1
MR 2
MR 3
AR 1
AR 2
AR 3
PCA Analysis MDS Means Plot
MR 2
AR 1
AR 3
MR 3
-4 -2 0 2 4
PC1
-2
0
PC
2
Temp_C
DO mg/L
pH
Salinity
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Sediment Composit ion (Middle)
4
6 Station MR 1
MR 2
MR 3
AR 1
AR 2
AR 3
Gravel
MR 1
MR 2
AR 2
AR 3
2D Stress: 0
PCA Analysis MDS Means Plot
-8 -6 -4 -2 0 2
PC1
-2
0
2
PC
2
Organic Carbon, Total
Percent MoistureSiltClay
Sand
MR 3
AR 1
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TKN
W ater Quality Measurements
MR 1
MR 2
AR 1
2D Stress: 0
2
4
6 Station MR 1
MR 2
MR 3
AR 1
AR 2
AR 3
BOD
TSS VSS
Ammonia
TKN
Phosphorus
Chloride Orthophosphate
PCA Analysis MDS Means Plot
MR 3
AR 2
AR 3
-6 -4 -2 0 2 4
PC1
-4
-2
0
2
PC
2
BOD
Nitrate-N
Chloride Orthophosphate
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W ater Quality Measurements
2
4
6 Orthophosphate
6E-2
0.24
0.42 BOD
TSS VSS
Ammonia
TKN
Phosphorus
Chloride Orthophosphate 2
4
6 Station MR 1
MR 2
MR 3
AR 1
AR 2
AR 3
BOD
TSS VSS
Ammonia
TKN
Phosphorus
Chloride Orthophosphate
PCA Analysis
-6 -4 -2 0 2 4
PC1
-4
-2
0
PC
2
0.6
Nitrate-N
Orthophosphate Overlay
-6 -4 -2 0 2 4
PC1
-4
-2
0
PC
2 Nitrate-N
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Nek ton – B ag Seines
Transform: Fourth root
Resemblance: S17 Bray Curtis similarity
Station MR 1
MR 2
MR 3
AR 1
AR 2
AR 3
2D Stress: 0.27
MR 1
MR 2
AR 1
AR 2
2D Stress: 0.05
MDS Configuration MDS Means Plot
MR 2
MR 3
AR 3
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Nek ton – B ag Seines
Transform: Fourth root
Resemblance: S17 Bray Curtis similarity
Station MR 1
MR 2
MR 3
AR 1
AR 2
AR 3
2D Stress: 0.27
Transform: Fourth root
Resemblance: S17 Bray Curtis similarity
Season Spring
Summer
Fall
2D Stress: 0.27
MDS Configuration Seasonality
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Nek ton - Trawls
Transform: Fourth root
Resemblance: S17 Bray Curtis similarity
Station MR 1
MR 2
MR 3
AR 1
AR 2
AR 3
2D Stress: 0.16 MR 1 AR 1AR 2 AR 3
2D Stress: 0.01
MDS Configuration MDS Means Plot
MR 2
MR 3
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Nek ton – Trawls
Transform: Fourth root
Resemblance: S17 Bray Curtis similarity
Station MR 1
MR 2
MR 3
AR 1
AR 2
AR 3
2D Stress: 0.16
Transform: Fourth root
Resemblance: S17 Bray Curtis similarity
Season Spring
Summer
Fall
2D Stress: 0.16
MDS Configuration Seasonality
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Benthic Inverts (Middle)
Transform: Fourth root
Resemblance: S17 Bray Curtis similarity
Station MR 1
MR 2
MR 3
AR 1
AR 2
AR 3
2D Stress: 0.13
MR 1
AR 1
2D Stress: 0
MDS Configuration MDS Means Plot
MR 2
MR 3
AR 2
AR 3
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MD S : Dat a Overlays Transform: Fourt h root Transform: Fourt h roResemblance: S1 7 Bray Curti s similarity Resemblance: S1 7
2 D Stress: 0.27 Station MR 1
MR 2
MR 3
AR 1
AR 2
AR 3
Bag Seines
ot
Bray Curtis similarity
Salinity
5
20
35
50
2D Stress: 0.27
Transform: Fourth root
Resemblance: S17 Bray Curtis similarity
Nitrate-N
0.1
0.4
0.7
1
2D Stress: 0.27
Transform: Fourth root
Resemblance: S17 Bray Curtis similarity
D.O.
1
4
7
10
2D Stress: 0.27
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MD S : Dat a Overlays Transform: Fourth root
Resemblance: S17 Bray Curtis similarity
Station MR 1
MR 2
MR 3
AR 1
AR 2
AR 3
2D Stress: 0.27
Bag Seines
Transform: Fourth root
Resemblance: S17 Bray Curtis similarity
Bay anchovy
100
400
700
1E3
2D Stress: 0.27
Transform: Fourth root
Resemblance: S17 Bray Curtis similarity
Western mosquitofish
6
24
42
60
2D Stress: 0.27
Transform: Fourth root
Resemblance: S17 Bray Curtis similarity
Atlantic croaker
4
16
28
40
2D Stress: 0.27
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Taxonomic Diversity
20
40
60
80
100
De
lta +
A A
B
A B A B A B
20
40
60
80
100
De
lta +
ns
Bag
Seine
Collections
MR 1 MR 2 MR 3 AR 1 AR 2 AR 3
Station
0
2008 2009
Year
0
20
40
60
80
100
De
lta +
A
B
Spring Summer Fall
Season
0
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Bag Seine Trawl Benthic Infauna Water Column Profile Water Chemistry
Bag Seine ___
Trawl 0.158* ___
Benthic Infauna
0.099 0.230* ___
Agreemen t Amon g th e MD S Configurations
Water Column Profile
0.125* 0.230* 0.033 ___
Water Chemistry
0.063 0.024 -0.033 0.471** ___
Sediments -0.002 0.051 -0.148 0.084 0.276*
Probability of obtaining a larger correlation coefficient by random chance
(based on 1,000 permutations) denoted by: * = prob. < 0.01, ** = prob. < 0.001.
Significant correlations (ρs > 0.3) identified in bold.
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Routi ne Field Parameters
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Routi ne Field Parameters
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MDS Means Plot
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W ater Chemistry
Highland Bayou
Diversion Canal
Mission River
Texas City Pump Canal
TCPC
HBDC
Mission River
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W ater Chemistry
Highland Bayou
Diversion Canal
Mission River
Texas City Pump Canal
TCPC
HBDC
Mission River
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Trawl Collections
Summer Season
Collections
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Study Streams
Biological Physiochemical Sediment Instream Flow Habitat
Average Taxonomic Diversity �o
SIMPER analysis used to
identify the best “candidate
indicator taxa or
constituents”
Sensitivity of
indicator taxa to
changes in
“other”
chemical and
physical data
collected
Part C
Index Development
Biocriteria For
Tidal Streams Index Score
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Coast-wide Nekton
Abundanc e Patter ns i n Seines
Bay anchovy Grass shrimp
Gulf menhaden Brown shrimp
White shrimp Silversides
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Relationships to Env . Variables
*** Normalized Abundance
Trend line = Nonlinear form E[y] = a *
xb
Temperature Dissolved Oxygen Salinity
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Coast-wide Nekton
Abundanc e Patterns i n Trawls
Bay anchovy Gulf menhaden
Blue catfish
Atlantic croaker
White shrimp
Silver seatrout
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Relationships to Env . Variables
Temperature Dissolved Oxygen Salinity
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Summary (M /A Study)
• Watershed characteristics (=Salinity) appears to be the dominan t factor structuring biologica l communities – Patter n consistent across th e multipl e levels of
ecologica l integrity measure d for a number of studiesstudies
– Eve n accountin g for extrem e drought conditions
• Lowermos t Stations had the mos t “distinct ” nekton communities – Gear dependent
– Agrees wit h th e Habitat assessment
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Summary (M /A - Coastal)
• Benthic Communities (and Aquatic Inverts) responded less to Salinity – Dominate d by opportunistic taxa an d species
define d as “ubiquitous” – floodin g event re-sets
• • DDii ssssooll vveed d OO xxyyggeenn ll eessss ii mpmpoorrttaannt t tthh aann SS aallii nniitty y in structuring the biologica l communities – Many estuaries wit h seasona l hypoxi a ar e som e of
th e most producti ve systems for fisheries
• The extreme euryhaline / physiologica l abilities o f the nekton almos t precludes a spatially applicable “IBI”
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Summary (M /A – Coastal)
• ________________________
Biological
Chemical Physical