Ecological Archives E089-139-A1

David A. Rogers, Thomas P. Rooney, Daniel Olson, and Donald M. Waller. 2008. Shifts in southern Wisconsin forest canopy and understory richness, composition, and heterogeneity. Ecology 89:2482–2492.

Appendix A. A table showing importance values of canopy species for the "average" stand and the total frequency in each time period.

TABLE A1. Compares importance values of canopy species for the “average” stand and the total frequency (80 trees/stand) in each time period.

 

Importance Value

Total Frequency

Taxa

1950

2004

Change (%)

1950

2004

Change (%)

Quercus rubra

27.97

11.18

-0.6

1576

706

-0.55

Quercus alba

31.27

15.15

-0.52

1596

821

-0.49

Ulmus rubra

5.5

6.49

0.18

475

432

-0.09

Ostrya virginiana

4.06

4.16

0.02

310

301

-0.03

Tilia americana

8.19

12.09

0.48

598

693

0.16

Fraxinus sp.

0

3.03

303

199

286

0.44

Acer saccharum

10.71

25.52

1.38

940

1689

0.8

Prunus serotina

2.85

6.6

1.31

235

456

0.94

Carya cordiformis

0

2.96

296

137

294

1.15

Ulmus americana

0

4.34

434

125

312

1.5


[Back to E089-139]