Biology Reference
In-Depth Information
Species data
yes
no
Georeferenced
abundance
Use
general
invasion
theory
Species lists
Generalized
monitoring plan
External to the
management
unit
Internal to the
management
unit
Prioritize for
population
spread
Prioritize for
new invaders
Prioritized
monitoring plan
Develop predictive
single-species
models
Develop predictive
multiple-species
models
Optimized
monitoring plan
Fig. 2.2
Flowchart linking available species data with synthesis processes resulting in different
hierarchical levels of final sampling plans
However, two factors appear particularly important: plant propagule pressure and
plant resource availability (Davis et al. 2000; Brooks 2007). Collectively, these two
factors can be used to develop a basic program for monitoring specific sites.
Information collected during this basic monitoring program can then be used to
evaluate and adjust monitoring as needed (Holling 1978).
Plant propagule pressure is related to the number of disseminules (e.g., seeds,
rhizomes) introduced into an area per unit time and the species that they represent
(Lockwood et al. 2005). Dispersal rates are positively associated with pathways
