Invasive Plants Association of Wisconsin

Plant List (pdf) Interactive List Intro
Sortable Table
Column Reference
Survey Methods
Results of the Survey
Correlations
Figure 1 Relationships
Figure 2 Abundance
Figure 3 Ecoregions
References
Invas. Weed Survey (pdf)

Knapweed

IPAW Working List of the
Invasive Plants of Wisconsin

Correlations of mean scores for six survey variables

and the number of observers for 183 species for
which the survey received 3 or more respondents.

Numbers shown in the table are Pearson correlation coefficients.

Obs. No. = number of observers for each species;
Disturb. = Disturbance;
Abund. = Abundance;
Comp. = Competitive ability;
Spread = Rate of Spread;
Control = Feasibility of Control

	Obs. No.	Disturb.	Abund.	Impact	Comp.	Spread	Control
No. Observers	1.000
Disturbance	0.291	1.000
Abundance	0.696	0.384	1.000
Impact	0.331	0.590	0.325	1.000
Comp.	0.401	0.634	0.423	0.929	1.000
Spread	0.204	0.443	0.166	0.783	0.766	1.000
Control	0.281	0.480	0.279	0.768	0.769	0.681	1.000

Invasive Plants Association of Wisconsin

IPAW Working List of the Invasive Plants of Wisconsin

Correlations of mean scores for six survey variables

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IPAW Working List of the
Invasive Plants of Wisconsin