Salinity in Biscayne Bay and the Biscayne Bay Coastal Wetlands › geer2017 › ... · Salinity in...

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