Table 6 Statistical properties and predicted net primary production (NPP) for water-quality data from 1985 to 2015. NPP FIT = model-fitted NPP using observed flow and salinity; NPP MNS = flow-adjusted NPP using long-term means of freshwater flow and salinity.

From: Seasonal to Inter-Annual Variability of Primary Production in Chesapeake Bay: Prospects to Reverse Eutrophication and Change Trophic Classification

Salinity Zone (units)

Season

Zp (m)

Temp (oC)

Salinity

log10 chl-a (mg m−3)

chl-a

L CI, U CI

log10. Euchl-a (mg m−2)

Euchl-a

L CI, U CI

log10. NPP FIT (mg C m−2 d−1)

NPP FIT

L CI, U CI

log10 NPP MNS (mg C m−2 d−1)

NPP MNS

L CI, U CI

OH

Winter

4.04

3.73

5.60

0.630

4.30

(3.17, 5.43)

1.21

16.1

(14.9, 17.3)

1.84

69.8

(68.6, 71.0)

1.83

67.4

(66.2, 68.6)

OH

Spring

3.42

11.6

4.76

0.910

8.09

(6.99, 9.19)

1.42

26.4

(25.2, 27.5)

2.53

341.2

(340.0, 342.4)

2.56

361.9

(360.7, 363.1)

OH

Summer

3.54

26.7

6.90

1.09

12.3

(11.3, 13.4)

1.63

42.8

(41.8, 43.9)

3.10

1264

(1263, 1265)

3.09

1239

(1238, 1240)

OH

Fall

4.25

17.3

7.78

0.780

5.99

(4.89, 7.09)

1.39

24.4

(23.3, 25.5)

2.59

386.9

(385.7, 388.2)

2.71

510.6

(509.4, 511.8)

MH

Winter

5.87

11.7

13.6

0.869

7.40

(6.31, 8.49)

1.66

45.7

(44.6, 46.8)

2.47

291.6

(290.4, 292.7)

2.46

290.6

(289.4, 291.7)

MH

Spring

5.39

9.40

12.1

0.957

9.06

(7.94, 10.2)

1.71

50.9

(49.8, 52.0)

2.87

746.3

(745.2, 747.5)

2.91

812.2

(811.1, 813.4)

MH

Summer

5.88

18.2

12.5

1.01

10.2

(9.12, 11.3)

1.70

50.5

(49.4, 51.6)

3.24

1739

(1738, 1740)

3.22

1669

(1668, 1670)

MH

Fall

6.32

18.3

15.5

0.876

7.51

(6.44, 8.58)

1.30

45.9

(44.8, 47.0)

2.93

852.8

(851.7, 853.9)

3.05

1116

(1115, 1117)

PH

Winter

6.89

5.95

20.4

0.740

5.55

(4.55, 6.55)

1.57

36.9

(35.9, 38.0)

2.27

187.6

(186.5, 188.7)

2.21

163.5

(162.4, 164.6)

PH

Spring

7.10

12.2

18.2

0.780

6.03

(5.03, 7.03)

1.62

41.3

(40.2, 42.4)

2.83

672.5

(671.4, 673.7)

2.84

688.8

(687.6, 689.9)

PH

Summer

6.40

26.6

19.8

0.820

6.65

(5.65, 7.65)

1.62

41.8

(40.8, 42.9)

3.17

1489

(1488, 1490)

3.14

1370

(1369, 1371)

PH

Fall

6.71

18.6

21.9

0.770

5.89

(4.83, 6.95)

1.59

38.7

(37.6, 39.7)

2.89

779.7

(778.6, 780.8)

3.09

925.2

(924.1, 926.3)

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