Ecological Archives E091-053-A3

Stuart Wagenius and Stephanie Pimm Lyon. 2010. Reproduction of Echinacea angustifolia in fragmented prairie is pollen-limited but not pollinator-limited. Ecology 91:733–742.

Appendix C. A table and a figure showing the relationship between bee visitation per plant per season and two measures of plant reproduction.

TABLE C1. Contingency table of bee visitations per plant per season (bee visits on no days, bee visits on some days, bee visits on all days) and the index of increasing pollen limitation (persistent styles not present on any day observed, style persistence observed some days, style persistence observed on all days) in 2005. Expected values are based on null model of no association. Fisher Exact test P value = 0.013.

Persistent style
rows present

Bee visitation per plant

 

Visits on no days

Visits on some days

Visits on every day

 

Obs.

Exp.

Obs.

Exp.

Obs.

Exp.

No days

34

30.6

1

4.6

8

7.8

Some days

68

68.2

15

10.3

13

17.5

Every day

11

14.2

1

2.1

8

3.6

 

 

   FIG. C1. The relationship between bee visitation per plant per season and seed set in 2004. Bee visitation was considered as three categories: no bee visits observed, a bee visit on at least one (but not all) days, a bee visit on every day (ANOVA, F2,176 = 0.0004, P = 0.99)


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