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Table 3 Percent cover and percent frequency by structural community type for important species encountered at the study sites in the Bald Hills of Redwood National Park, California, USA. Values in parentheses represent the standard deviation. Bold font = native species; asterisk = perennial grass.

From: The Effects of Conifer Encroachment and Overstory Structure on Fuels and Fire in an Oak Woodland Landscape

Species

 

Grassland

Oak savanna

Oak cluster

Oak woodland

Arrhenatherum elatius*

Cover

7.58 (5.81)

12.36 (13.03)

5.08 (3.69)

6.08 (4.92)

Frequency

90

100

100

90

Bromus carinatus*

Cover

0.33 (0.70)

6.94 (7.42)

2.25 (3.04)

5.25 (3.35)

Frequency

20

66.6

50

80

Cynosurus echinatus

Cover

40.58 (13.41)

23.61 (11.47)

33.41 (23.05)

16.50 (13.02)

Frequency

100

100

100

100

Dactylis glomerata*

Cover

0.58 (1.84)

2.50 (0.91)

3.83 (3.24)

5.08 (4.50)

Frequency

10

100

80

100

Elymus glaucus*

Cover

7.08 (5.33)

5.83 (4.65)

3.76 (2.20)

5.75 (4.70)

Frequency

80

100

90

70

Holcus lanatus*

Cover

3.83 (9.66)

—

0.16 (0.52)

—

Frequency

30

0

10

0

Lathyrus vestitus

Cover

—

—

—

3.08 (5.38)

Frequency

0

0

0

50

Pteridium aquilinum

Cover

4.83 (9.20)

2.08 (5.10)

4.08 (8.20)

—

Frequency

40

16.6

30

0

Rumex acetosella

Cover

4.83 (7.71)

0.97 (2.38)

1.58 (3.10)

—

Frequency

50

16.6

20

0

Trifolium bifidum

Cover

15.25 (13.70)

2.49 (4.01)

0.16 (0.52)

—

Frequency

90

33.3

10

0