Jackson (2015) mentioned that the results of their analyzes were very generic and that additional research needed to be conducted to fully understand the interactions of invasive species and the effects of invasive species on various environments. . It has also been suggested that more research be conducted outside of the United States since 43% of the articles used in this study conducted their research in the United States (Jackson, 2015). Hoopes et al. (2013) also mentioned several limitations to their research. Data was missing for a large number of shelters, which posed a problem when examining trends and patterns within the data. Additionally, because the data was collected from many undergraduate students across the United States, errors were made due to incorrect data compilation and entry. Finally, the history of the territory was not taken into account in this study, which could have an effect on the end