Environmental Engineering Reference
In-Depth Information
6000000
Dominant generalist
Subdominant generalist
Specialist
Transient
N
34
Mean
17035
SE
16485
N
33(without BRTE)
Mean
550
SE
195
20000
10000
0
Species code
Fig. 2.1
An example of selecting priority species of non-native plants in the
Grand Staircase-Escalante National Monument, Utah, based on frequency
and foliar cover data from 351 plot locations in the Monument. BRTE,
Bromus
tectorum
(cheatgrass), was the most dominant weed, followed by POPR,
Poa pratensis
(Kentucky bluegrass), and TRDU,
Tragapogon dubius
(western
goatsbeard).
Number of exotic species
0-1
1-2
2-3
3-5
5-6
6-7
N
9
0
9
18 Km.
R
2
based on OLS and regression trees
42%
Fig. 2.2
Modelled distribution of exotic (non-native) plant species richness
based on 303 vegetation plots (1000 m
2
plots with minimum mapping unit
of 10 m
2
) in the Grand Staircase-Escalante National Monument (GSENM),
Utah, showing 'hot spots' of invasion along riparian zones in the 850,000 ha
Monument.
