Final answer:
In invasion ecology, propagule pressure and community susceptibility are two main aspects that are considered when studying the impact of invasive species on ecosystems.
Step-by-step explanation:
The field of invasion ecology, a subset of community ecology, focuses on understanding and managing the effects of invasive species on native ecosystems.
Two main aspects considered in invasion ecology are propagule pressure and community susceptibility.
Propagule pressure refers to the quantity and frequency of new individuals entering an ecosystem, which is a strong predictor of the success of invasive species.
Community susceptibility, on the other hand, encompasses the resistance or vulnerability of the existing community to invasions, which can be influenced by factors such as environmental disturbances, species diversity, and the presence of vacant niches.
From a community ecology perspective, these aspects are vital for predicting invasion outcomes and forming conservation strategies.
The idea is that ecosystems with high propagule pressure are more likely to experience invasions, while communities with lower resistance are more susceptible to the impacts of these invasive species.