Ecological Archives E090-053-A2

Mia O. Hoogenboom and Sean R. Connolly. 2009. Defining fundamental niche dimensions of corals: synergistic effects of colony size, light, and flow. Ecology 90:767–780.

Appendix B. Multivariate regression analysis of the combined effects of light and flow on protein content and reproductive output.

TABLE B1: Regression analyses between tissue properties (total protein and egg number) with irradiance and flow conditions for each of Acropora nasuta, Leptoria phrygia, and Montipora foliosa. An asterisk denotes statistically significant regression or partial correlation at α = 0.05.

Acropora nasuta

Protein content (mg/cm2)

Regression summary:

R = 0.10, R2 = 0.01, F(2,51) = 0.27, P = 0.76

β

Std. Error of β

t

P

Light intensity

-0.04

0.14

-0.28

0.79

Flow velocity

0.10

0.14

0.69

0.50

Reproduction (eggs/polyp)

Regression summary:

R = 0.16, R2 = 0.02, F(2,51) = 0.64, P = 0.53

β

Std. Error of β

t

P

Light intensity

0.09

0.14

0.67

0.50

Flow velocity

0.12

0.14

0.89

0.38

 

Leptoria phrygia

Protein content (mg/cm2)

Regression summary:

R = 0.45, R2 = 0.20, F(2,51) = 6.6, P < 0.01*

β

Std. Error of β

t

P

Light intensity

0.16

0.12

1.31

0.20

Flow velocity

-0.42

0.12

3.36

0.002*

Reproduction (eggs/polyp)

Regression summary:

R = 0.27, R2 = 0.08, F(2,51) = 2.1, P = 0.13

β

Std. Error of β

t

P

Light intensity

0.10

0.13

0.76

0.45

Flow velocity

-0.25

0.13

-1.90

0.06

 

Montipora foliosa

Protein content (mg/cm2)

Regression summary:

R = 0.33, R2 = 0.11, F(2,51) = 1.8, P = 0.18

β

Std. Error of β

t

P

Light intensity

-0.33

0.17

-1.87

0.07

Flow velocity

-0.004

0.17

-0.02

0.98

Reproduction (eggs/polyp)

Regression summary:

R = 0.38, R2 = 0.15, F(2,51) = 2.6, P = 0.09

β

Std. Error of β

t

P

Light intensity

-0.38

0.17

-2.2

0.03*

Flow velocity

0.15

0.17

0.88

0.39


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