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-invasive signal crayfish
APEM-invasive Tricellaria inopinata

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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An image of invasive Rhododendron

Related content

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

Blog

Risk assessing pathways of invasion

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Managing INNS (Invasive and Non-Native Species) is often underpinned by the application of risk assessments to aid in prioritising and targeting management

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Blog

If big plants cause big problems, do little plants cause littl...

Arrow - If big plants cause big problems, do little plants cause little problems?
If big plants cause big problems, do little plants cause little problems? Thumbnail

Small invasive plants are often overlooked as site managers target large dominating species we explore the threat posed by little plants

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Blog

Testing the water – without getting wet: eDNA as a technique f...

Arrow - Testing the water – without getting wet: eDNA as a technique for INNS detection
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Environmental DNA, or eDNA, describes the genetic material that can be obtained from an environmental sample such as water, sediment, snow, or soil

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Blog

Spotlight on non-native fish in the UK

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Non-native fish can damage our aquatic environments and threaten biodiversity on a global scale

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Blog

There’s something about that seawall: marine invasive and non-...

Arrow - There’s something about that seawall: marine invasive and non-native species love living on man-made coastal structures
There’s something about that seawall: marine invasive and non-native species love living on man-made coastal structures Thumbnail

A coastal ecologist’s insight into where to find marine invasive and non-native species along the UK coast

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Blog

Detecting non-native copepods in the UK

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Currently most non-native copepods are considered unlikely to cause considerable damage to an ecosystem so are classed as harmless and non-invasive

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Blog

How are invasive and non-native species found and recognised?

Arrow - How are invasive and non-native species found and recognised?
How are invasive and non-native species found and recognised? Thumbnail

We share how to find and recognise invasive and non-native species APEM's team of non-native species experts can help with identification and management

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Case Study

Signal Crayfish Eradication

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Highly invasive signal crayfish were completely eradicated from a Scottish reservoir, protecting local rivers and a salmon fishery.

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