This study showed that the invasive species thought to invade the Weddell Sea food web due to rising water temperatures, do not alter the current structure of the food web in any considerable way. Nor do they them selves become important in the food web. The lack of changes in the food web structure due to the presents of these invasive species are probably a result of not including factors such as abundances and network dynamics in the analyses. Abundance seem to be one of the driving forces when it comes to changes in food web structure caused by invasion of species. To solely study food web structure through who eats whom does therefore not seem to be enough to determine the whole picture regarding the impact these invasive species has on the structure of the Weddell Sea food web. In areas nearby the Weddell Sea durophagous predators have already invaded and the native community have remained highly diverse. This is thought to be due to the invasive species broad spectrum of prey. Their omnivorous behaviour and opportunism towards their food source is thought to distribute the predation pressure more and prevent elimination of any particular species. This suggest that the invasive species thought to invade the Weddell Sea will act similar in this community. It is, however difficult to predict how the impact of these invasive species will co-occur with simultaneous events like environmental changes. Climate change which is likely to increase the water temperature and thereby also help the invasive species to invade, will probably also play an important part in how everything plays out in this ecosystem. Further climate change will most probably have a large impact on this fragile endemic fauna, which in combination with the impact of the invasive species could really alter the food web of the Weddell Sea.