Ecological Archives E085-096-A1

Mark C. Urban. 2004. Disturbance heterogeneity determines freshwater metacommunity structure. Ecology 85:2971–2978.

Appendix A. A table documenting among-pond environmental variation.

Table A1. Pond permanence, habitat characteristics, and their loadings on PC1.

Pond ID

PC1 scores

Permanence

Loge Area
(m2)

Max. Depth
(cm)

Percent
Vegetation structure

Percent canopy cover

Total habitat diversity

               

t-1

-1.84

0

0.78

24

0

77

2

t-2

-0.33

9

2.18

26

8

93

2

t-5

1.58

14

2.85

40

20

79

4

u-4

4.14

19

3.78

27

51

19

7

v-2

1.07

14

2.84

52

5

80

3

w-1

-0.83

2

3.31

43

0

100

2

w-4

-1.61

1

2.33

25

0

100

2

x-7

2.40

14

3.92

29

45

49

3

x-8

-1.46

1

2.40

30

3

100

1

x-9

2.36

14

3.29

80

34

61

2

y-3

0.08

2

2.37

39

8

20

1

y-4

-2.73

0

0.78

17

0

100

1

y-7

-2.33

0

0.95

20

0

93

1

z-5

-0.49

0

2.83

29

10

89

2

               

PC1 factor loadings

--

0.471

0.422

0.25

0.477

-0.381

0.405

Correlation with permanence

0.93

--

0.69

0.46

0.84

-0.59

0.78

   Notes: Permanence measured as weeks after sampling with visible water. See text for details of data collection.

Correlation coefficients calculated after transformation of percent vegetation structure and canopy cover by arcsin transformation .



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