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Salinity in Biscayne Bay and the Biscayne Bay Coastal Wetlands
Herve Jobert2 ,Sarah Bellmund1, Joe Serafy3, Jorge Robles Baneres2 , Joan Browder3 and Diego Lirman2
1 Biscayne National Park, Homestead, FL, USA
2 University of Miami, Rosenstiel School of Marine and Atmospheric Sciences, Miami, FL, USA
3 National Marine Fisheries Service, Miami, FL, USA
Greater Everglades Ecosystem Restoration Conference
Coral Springs, Florida
April 17-20 2017
Salinity Network and Integrated Biscayne Bay Ecological
Assessment Monitoring (IBBEAM)
• Designed in 2003-2004 by a multi-agency science team
• More sites added in 2010 along the shoreline
• Designed to meet needs of modeling and collecting data as close as possible to the shoreline at specific features
Instrument Deployment
• YSI 6600
• 15min recording – 24hr/365days
• Retrieved, downloaded, lab cleaned, deployed
• Extensive QA-QC
Florida Bay Reference Site (DJ, Downstream Joe Bay)
Salinity Regime Metrics
Mesohaline Index (M): Proportion of salinity observations ≥ 5 and < 18 psu
Hyperhaline Index (H):Proportion of salinity observations > 40 psu
Variability Index (V):Proportion of observations where daily salinity range is >5 psu
Mesohaline Index (M)
M = proportion of salinity observations where salinity ≥ 5 and < 18 psu
Target
Undesired
Warning
No color insufficient data
SB
PN
BP
No color insufficient data
SB
PN
BP
Hyperhaline Index (H)
H = proportion of salinity observations > 40 psu
Target
Undesired
Warning
No color insufficient data
SB
PN
BP
V = proportion of observations where daily salinity > 5 psu
Variability Index (V)
Target
Undesired
Warning
Mesohaline Condition Wet Season
Severe reduction of mesohaline conditions
Total annual rainfall data (average of S20F, S20G, S21A, S21, S123) Total annual flow data (sum of S20F, S20G, S21A, S21, S123)
Rainfall and Flow
S123 C100
S21 C1
S21A C102
S20G Military
S20F C103
Rainfall vs. Flow
S123 C100
S21 C1
S21A C102
S20G Military
S20F C103
y = 302.59x - 2951.7R² = 0.6703
0
2000
4000
6000
8000
10000
12000
14000
16000
18000
0 10 20 30 40 50 60
S12
3 F
low
(cf
s)
S123 Rainfall (inch)
y = 1628.8x - 7829R² = 0.6061
0
20000
40000
60000
80000
100000
120000
0 10 20 30 40 50 60
S21
Flo
w (
cfs)
S21 Rainfall (inch)y = 836.56x + 15800
R² = 0.6675
0
10000
20000
30000
40000
50000
60000
70000
0 10 20 30 40 50 60
S20
F F
low
(cf
s)
S20F Rainfall (inch)
Wet Mesohaline Index, Rainfall and Flow
Flow vs. Mesohaline Index
y = 1E-05x - 0.0146R² = 0.7207
0
0.05
0.1
0.15
0.2
0.25
0.3
0 5000 10000 15000 20000
Mes
oh
alin
e In
dex
62
S123 Flow (cfs)
y = 8E-06x - 0.0518R² = 0.8059
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
0 20000 40000 60000 80000 100000 120000
Mes
oh
alin
e In
dex
B8
S21 Flow (cfs)
Flow vs. Mesohaline Index
S123 C100
S21 C1
S21A C102
S20G Military
S20F C103
y = 1E-05x - 0.1962R² = 0.7173
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0 10000 20000 30000 40000 50000 60000 70000
Mes
oh
alin
e In
dex
14
S20F Flow (cfs)
Mesohaline Index and Flow
SB
PN
BP
Dry 2015 Flow (summed S20F, S20G, S21A, S21,
S123)
Dry 2016 Flow (summed S20F,
S20G, S21A, S21, S123)
Flow Increase
% Dry Flow Increase
41,356 164,314 122,958 297
Wet 2015 Flow (summed S20F, S20G, S21A, S21,
S123)
Wet 2016 Flow (summed S20F,
S20G, S21A, S21, S123)
Flow Increase
% Wet Flow Increase
67,654 157,171 89,517 132
April December
Average Monthly Salinity Maps
Comparison of sampling frequencyS
alin
ity
(psu
)
Described the spatial and temporal domain of the salinity network and the resolution of measurements
Demonstrated how the data streams are used to generate salinity regime metrics
Revealed relationships between rainfall, flow and the mesohalinemetrics
Results allow assessment of CERP performance against natural variation
Data results emphasize the need to collect data at high resolution so that we can record rare, but important events.
In progress are tools to investigate relationships between biota and antecedent salinity and temperature conditions (i.e., frequency of mesohaline conditions 30 days prior to biota sampling).
Summary
Thank you
