Ecological Archives A014-010-A4

Melinda G. Knutson, William B. Richardson, David M. Reineke, Brian R. Gray, Jeffrey R. Parmelee, and Shawn E. Weick. 2004. Agricultural ponds support amphibian populations. Ecological Applications 14:669–684.

Appendix D. A table of model-averaged predictor weights for predictor variables in agricultural ponds in Houston and Winona Counties, Minnesota, 2000–2001.

 Group

 PREDICTOR

Species richness

Multi-species
reproduction

American
Toad

Chorus
Frog

Gray
Treefrog

Green
Frog

Leopard or
Pickerel Frog

Spring
Peeper

Tiger
Salamander

Landscape

FOREST500

n/a

n/a

0.00

n/a

0.10

n/a

n/a

0.60

n/a

FOREST1000

n/a

n/a

0.00

n/a

0.69

n/a

n/a

0.12

n/a

FOREST2500

n/a

n/a

0.00

n/a

0.20

n/a

n/a

0.26

n/a

GRASSLAND500

n/a

n/a

n/a

0.18

n/a

n/a

0.00

n/a

0.19

GRASSLAND1000

n/a

n/a

n/a

0.02

n/a

n/a

0.26

n/a

0.01

GRASSLAND2500

n/a

n/a

n/a

0.83

n/a

n/a

0.06

n/a

0.04

WET_AREA500

0.26

0.03

0.75

0.00

0.01

0.03

0.63

0.66

0.81

WET_AREA1000

0.14

0.03

0.25

0.10

0.01

0.03

0.08

0.06

0.09

WET_AREA2500

0.00

0.03

0.00

0.09

0.01

0.03

0.17

0.17

0.01

NEAR_WET

0.06

0.03

0.00

0.13

0.00

0.13

0.15

0.33

0.06

NEAR_FOREST

0.00

0.06

0.00

0.00

0.00

0.32

0.53

0.37

0.38

Pond morphometry

W_DEPTH_MEAN

0.00

0.21

1.00

0.48

0.12

0.13

0.00

0.10

0.17

POND_AREA

0.60

0.03

0.00

0.00

0.00

0.03

0.00

0.00

0.74

Pond vegetation

TREESHRB

0.11

0.03

0.38

0.33

0.00

0.39

0.29

0.00

0.38

EMER

0.09

0.10

0.00

0.00

0.00

0.18

0.00

0.00

0.04

VEG_SUM

0.00

0.90

0.00

0.02

0.19

0.05

0.03

0.00

0.02

Predators

FISH

0.89

0.77

0.00

0.00

0.10

0.03

0.00

0.06

0.06

BCKSMR

0.00

0.07

0.62

0.02

0.39

0.03

0.00

0.03

0.01

DRGFLY

0.00

0.03

0.11

0.07

0.00

0.21

0.00

0.02

0.17

WATBEE

0.00

0.08

0.21

0.02

0.08

0.23

0.32

0.02

0.20

AMTRIN

0.65

0.14

0.00

0.17

0.04

0.07

0.00

0.00

n/a

Water quality

TOTNITR

0.75

1.00

0.00

0.02

0.71

0.50

0.37

0.06

0.17

TURB

0.00

0.04

0.68

0.02

0.13

0.49

0.00

0.88

0.01

COND

0.11

0.26

0.00

1.00

1.00

0.12

0.63

0.04

0.06

TOTPHOS

0.14

0.06

0.00

0.07

0.17

0.16

0.00

0.00

0.03

Design variable

TRTMT

0.20

0.00

0.00

0.00

0.00

0.00

0.40

0.06

0.00

n/a because that variable was not included in the model-building process.



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