Tackling marine invasive non-native species (INNS)

Non-native species are those that have been introduced, whether deliberately or accidentally, by humans. Some of these species can become invasive – known to pose major threats to native biodiversity, human health and ecosystem services. They can be extremely difficult to control or eradicate following introduction and establishment, particularly in the marine environment, therefore prevention and early detection are key. Coinciding with Invasive Species Week 2026, this talk will give an overview of the recommended priorities for tackling marine INNS in the UK and current projects Natural England has been involved in – species monitoring in ports and marinas, developing a methodology to assess hull fouling on recreational vessels and implementing estuary wide biosecurity plans.

Jan Maclennan has worked for Natural England for the last 14 years as a marine specialist in the national science team. As well as being the lead for marine invasive species and biosecurity work, she also works on marine recreational activities – providing advice on impacts and management. For a number of years she coordinated and supported the network of Marine Protected Area partnerships across England. Her first marine science role prior to Natural England, was at the Marine Management Organisation in the conservation team. She is based in Cumbria after recently relocating from Devon. Although she doesn’t get out in the field as much as she would like to, there are far fewer INNS (at the moment) to deal with up in Cumbria than on the South coast!