Graphical data exploration
Measurements of the hitchhiker seedlings after one growing season reflected the differences among stock types (Figure 1). With a later sow date, green alder plants were larger with greater survivorship. Contrastingly, with later sow date the fireweed plants within the hitchhiker seedlings were smaller and corresponded to lower occurrence.
The community composition also had high variance and lack of normality among stock types (Figure 2). In general, the community compositions varied and ranged from a higher amount of non-native forb vegetation cover, then grass, and smaller amounts of native forb and woody natural regeneration vegetation cover.
The community composition also had high variance and lack of normality among stock types (Figure 2). In general, the community compositions varied and ranged from a higher amount of non-native forb vegetation cover, then grass, and smaller amounts of native forb and woody natural regeneration vegetation cover.
Figure 1. The hitchhiker seedling growth traits after one year was shown to be driven by stock type. The upper panels show alder and lower panels show fireweed vegetative cover (%), height (cm), and survivorship (%) or occurrence (%). There is an inverse type relationship between alder and fireweed with later sow dates; later sow dates resulted in larger alder with greater survivorship and smaller fireweed with lower occurrence. (n=6).
Figure 2. The community composition surrounding hitchhiker seedlings relative to each stock type. Functional groups include grass, native forb, non-native forb, and woody vegetation cover (%). (n=6).
Figure 3. NMDS ordination using Euclidean distances of the community composition surrounding hitchhiker seedlings relative to stock type (n=6).