Ecological Archives A025-134-A2

Kimberly L. Dibble, Charles B. Yackulic, Theodore A. Kennedy, and Phaedra Budy. 2015. Flow management and fish density regulate salmonid recruitment and adult size in tailwaters across western North America. Ecological Applications 25:21682179. http://dx.doi.org/10.1890/14-2211.1

Appendix B. Result of Principal Component Analyses for data on the seasonal proportion of flow in rainbow and brown trout generalized linear mixed models.

Table B1. Result of Principal Component Analysis (PCA) for data on the seasonal proportion of flow in rainbow trout (RBT) generalized linear mixed models. PC1 (1st axis, PCA) accounts for the highest degree of variability; PC2 (2nd axis, PCA) accounts for the second highest degree of variability in the data. Bolded PC loadings indicate the season(s) that contribute the most to the first or second principal component.

 

RBT Recruitment

RBT Adult Length

 

PC1

PC2

PC1

PC2

Non-Lagged

Winter

0.48

0.72

0.46

0.73

Spring

0.49

-0.70

0.50

-0.69

Summer

-0.73

-0.00

-0.73

-0.01

Standard Deviation

1.37

1.06

1.36

1.07

Proportion of Variance

0.63

0.37

0.62

0.38

Cumulative Proportion

0.63

1.00

0.62

1.00

Lagged 1-2 Years

Winter

-0.47

-0.72

-0.45

-0.74

Spring

-0.50

0.69

-0.51

0.68

Summer

0.73

0.01

0.73

0.01

Standard Deviation

1.37

1.07

1.36

1.07

Proportion of Variance

0.62

0.38

0.62

0.38

Cumulative Proportion

0.62

1.00

0.62

1.00

 

Table B2. Result of Principal Component Analysis (PCA) for data on the seasonal proportion of flow in brown trout (BT) generalized linear mixed models. PC1 (1st axis, PCA) accounts for the highest degree of variability; PC2 (2nd axis, PCA) accounts for the second highest degree of variability in the data. Bolded PC loadings indicate the season(s) that contribute the most to the first or second principal component.

 

BT Recruitment

BT Adult Length

 

PC1

PC2

PC1

PC2

Non-Lagged

Winter

0.48

0.70

0.47

0.71

Spring

0.47

-0.71

0.48

-0.70

Summer

-0.74

0.00

-0.74

-0.00

Standard Deviation

1.35

1.09

1.35

1.09

Proportion of Variance

0.61

0.39

0.61

0.39

Cumulative Proportion

0.61

1.00

0.61

1.00

Lagged 1-2 Years

Winter

-0.45

-0.73

0.42

0.75

Spring

-0.50

0.68

0.52

-0.66

Summer

0.74

0.01

-0.74

-0.03

Standard Deviation

1.35

1.08

1.34

1.10

Proportion of Variance

0.61

0.39

0.60

0.40

Cumulative Proportion

0.61

1.00

0.60

1.00


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