Keeping invasive and non-native species at bay

Non-native species remain a global threat to biodiversity, APEM provide expert advice on the identification, monitoring, risk assessment, control and management of invasive non-native species in marine, terrestrial and freshwater environments.

Freshwater environments

One of the more common, yet voracious INNS found throughout England, Scotland and Wales is the signal crayfish (Pacifastacus leniusculus). APEM’s internationally renowned experts develop and deliver everything from baseline surveys, assessments and biosecurity plans through to bespoke training and workshops.

With a national field team, inhouse freshwater taxonomists and laboratory analysts, invasion biologists, freshwater ecologists and consultants, our approach to INNS management is truly integrated.

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APEM - Signal Crayfish
APEM ltd - Tricellaria-inopinata-Bushy-bryozoan

Marine INNS

Every shoreline, estuary, pontoon, sea wall or rock pool plays a role in the marine INNS story. Over recent years, the popularity of watersports has risen rapidly, however, with greater participation comes increased levels of marine INNS being introduced and spread.

INNS are more opportunistic than native species and can colonise onto hard substrates quickly including the hulls of boats and ships. This means that they can be carried from port to harbour to marina, around the world, rapidly and mainly undetected.

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Plants and terrestrial environments

As well as ‘The Big Three’ Japanese knotweed, Himalayan balsam and giant hogweed, the specialists within the non-native species team at APEM provide expert advice and biosecurity plans for other, lesser-known species.

It is possible to identify and map many terrestrial or plant-based INNS using ultra-high resolution aerial surveys. Species include New Zealand pygmyweed (Crassula helmsii), Canadian and Nuttall’s waterweed (Elodea canadensis and Elodea nuttallii) and the common garden Rhododendron (Rhododendron ponticum), one of Ireland’s more common invasive non-native species.

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APEM - Rhododendron

Related content

Read one of APEM’s blogs, news articles or case studies to find out more.