Step 1: Evaluate Anthropogenic Influences.
An influx of nutrients can disrupt native plant communities, creating conditions favorable for invasive species that can exploit these resources more effectively than native species.
Step 2: Consider the Impact of Disease on Dominant Species.
A decline in a dominant species due to disease can create gaps in the ecosystem, reducing competitive pressures and allowing invasive species to establish more easily.
Step 3: Assess the Impact of Competitive Exotic Species.
The arrival of a highly competitive exotic species can directly challenge native species for resources, leading to changes in the community structure and potentially displacing native species.