Ecological Archives E088-026-A4

F. Leland Russell, Svata M. Louda, Tatyana A. Rand, and Steven D. Kachman. 2007. Variation in herbivore-mediated indirect effects of an invasive plant on a native plant. Ecology 88:413–423.

Appendix D. ANCOVA results for effects of focal musk thistle patch density and distance to the focal patch on Rhinocyllus conicus egg load on wavyleaf thistles and a bar graph of mean (SE) R. conicus egg load on wavyleaf thistles at sites with low vs. high musk thistle densities in the focal patch.

Source

Numerator df

Denominator df

F

P

 
 
 
 
 

Musk thistle density

1

32.3

0.05

0.8327

Distance

3

90.8

25.31

<0.0001

Musk thistle density × distance

3

90.8

0.87

0.4591

Wavyleaf thistle size

1

1030

14.44

0.0002

Size × musk thistle density

1

1030

0.03

0.8524

Size × distance

3

1029

2.43

0.0904

Size × musk thistle density × distance

3

1029

0.58

0.4116


 
   FIG. D1. Bar graph of mean (SE) Rhinocyllus conicus egg load on wavyleaf thistles at sites with low vs. high musk thistle densities in the focal patch.


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