Back to roadmapBack to list

Prevention of invasive species

Prevention of invasive species to protect native ecoysystems.

ResilienceInland shippingMarine shippingPort/terminalTrainsTrucks

Introduction

Invasive alien species are organisms introduced outside their natural range that can harm biodiversity, infrastructure, economic activities or human health. Ports are important entry points because species can arrive through ballast water, hull biofouling, cargo, packaging, vehicles and connected waterways. Trucks and trains mainly transport species through contaminated cargo, like soil, plants, timber, packaging or equipment. EU controls therefore focus on risk-based inspections, phytosanitary certificates, traceability and treatment of regulated goods rather than routine chemical disinfection of every vehicle. Next to seagoing vessels, Inland vessels can also spread organisms through hull fouling, water or sediment, although the requirements designed for international seagoing ships do not always apply to inland vessels directly. Ports should assess all relevant pathways and determine suitable local measures. Effective prevention combines pathway management, monitoring, early warning, rapid response and stakeholder cooperation.

Value proposition

  • Protect local ecosystems

  • More effective than controlling after establishment

Prevention for invasive alien species is usually more effective and less costly than controlling a species after establishment. Strong port biosecurity protects local ecosystems, fisheries, water infrastructure and port operations. Monitoring and clear response procedures can detect new introductions before they spread. A coordinated approach also supports compliance with national, EU and IMO requirements. Climate-aware risk assessment is important because changing climate conditions may allow more introduced species to survive.

Port applicability

The topic is relevant to all seaports and inland ports. The risk is higher in ports receiving vessels from multiple regions, handling ballast water or biological materials, or hosting vessels with significant hull fouling. Ports located where rivers meet the sea may provide suitable conditions for both marine and freshwater species. Extensive connections to rivers and canals can also increase the risk of further spread. High traffic volumes and diverse origins create more potential introduction pathways. Local salinity, temperature, habitats and climate trends determine whether an introduced species can survive and establish.

Groups of innovations

  • Pathway and risk assessment

    Map for vessel, truck and train; routes, ballast discharges, hull fouling, cargo flows and natural connections. Timing: immediate; Pros: focuses resources; Cons: requires current traffic and environmental data.

  • Ballast water compliance and surveillance

    Check documentation, inspect treatment systems and use risk-based sampling. Under the IMO Ballast Water Management Convention, ships in international traffic must manage and treat ballast water before discharge. Requirements do not automatically apply to all inland vessels, so ports should assess inland shipping separately under applicable local or national rules. Timing: immediate. Pros: addresses a major introduction pathway. Cons: requires inspection, sampling and enforcement capacity.

  • Biofouling management

    Promote vessel management plans, inspections and environmentally responsible hull cleaning. Timing: immediate to short term; Pros: reduces hull-mediated transfer; Cons: IMO guidance remains voluntary.

  • Port environmental monitoring

    Use settlement plates, traps, visual surveys, water sampling and environmental DNA (eDNA) analysis. eDNA detects genetic material left by organisms in water, soil or sediment and can identify species that are difficult to observe directly. For land-based species, monitoring may also include soil sampling, insect traps and inspections of cargo, packaging, vehicles and vegetation. Timing: immediate to short term. Pros: supports early detection across aquatic and terrestrial areas. Cons: methods require specialist expertise, consistent sampling and verification of uncertain results.

  • Early warning and rapid response

    Define notification, verification, containment and eradication procedures in advance. Timing: immediate; Pros: increases response speed; Cons: eradication is difficult after spread.

  • Biosecure operations and communication

    Apply risk-based inspection, cleaning and waste protocols for cargo, packaging, containers and equipment. High-risk cargo may require additional measures such as fumigation, heat treatment, low-oxygen treatment or temporary quarantine. Inform port users about requirements and reporting procedures. Timing: immediate; Pros: covers multiple introduction pathways; Cons: requires specialist handling and compliance by many actors.

Impact

Impact level per aspect
ImpactLevelRemark
BiodiversityVery large impact
Reduces introductions and spread that disrupt native ecosystems.
Port resilienceLimited impact
Limits ecological and operational disruption.
InfrastructureMedium impact
Helps prevent fouling or damage to water, land and port assets.
Port efficiencyLimited impact
Checks add procedures but may avoid future disruption
Port-city impactMedium impact
Protects fisheries, recreation and public water environments.
Knowledge and monitoringLarge impact
Creates environmental data for faster decisions.

Port characteristics

Ports that should prioritise invasive-species prevention are ports with international traffic, ballast-water discharge, frequent vessel lay-up or strong links to rivers and canals. Ports near sensitive habitats, aquaculture, fisheries or water infrastructure may face higher consequences. Ports with existing environmental monitoring and laboratory access are better prepared. Climate change can alter which species survive and thrive, so historic records alone are insufficient. The ports most likely to be unaffected by invasive species are ports where authorities, operators and researchers share data and maintain a joint response plan.

Barriers and enablers

Enablers

  • Standards & regulationEnabler

    IMO and EU frameworks support ballast, biofouling and IAS management.

  • TechnologyEnabler

    eDNA and improved monitoring support earlier detection.

  • DirectionalityEnabler

    Biodiversity policy and climate risks increase urgency.

Barriers

  • EconomicBarrier

    Monitoring and prevention activities needs recurring funds, while avoided damage is difficult to value.

  • KnowledgeBarrier

    New species can be difficult to identify and baseline data may be incomplete.

  • Stakeholder interactionBarrier

    Prevention requires coordination across vessels, terminals, authorities and waterways.

How to implement?

  1. Step 1

    Identify how non-native species can enter and spread

  2. Step 2

    Survey habitats and record existing non-native species

  3. Step 3

    Combine pathway, ecological and climate information

  4. Step 4

    Define monitoring, reporting, inspection and response roles

  5. Step 5

    Test methods such as settlement plates and eDNA

  6. Step 6

    Maintain surveillance and update risks as conditions change

Timeline

The arrow below represents the expected development of the TRL of prevention of invasive species.
* Technical Readiness Level

What should a port do in the next 3 years?

A port should map the main introduction and spread pathways and establish a baseline understanding of native ecosystems in both aquatic and terrestrial areas. Ballast-water and biofouling controls should be integrated with wider environmental monitoring. Standard preventive measures, such as the inspection, fumigation or treatment of high-risk cargo and packaging, should remain part of port procedures. Monitoring should focus on high-risk berths, water intakes, cargo areas and connected waterways. The port should define which organisation receives reports of unusual organisms and clarify each stakeholder’s responsibilities. A rapid-response protocol should then set out how authorities, laboratories and water managers verify, contain and manage a suspected introduction.

Investment overview

CAPEX: Investments may include sampling equipment, monitoring stations, databases, ballast-water inspection tools and access to eDNA laboratories. Existing water-quality infrastructure can often be reused. Major investments are mainly needed when identified risks require permanent containment, cleaning or treatment facilities, such as wash-down areas, quarantine zones or ballast-sediment reception facilities. Major physical infrastructure is therefore usually not required during the initial assessment and monitoring phase. OPEX: Recurring costs include surveys, laboratory analysis, specialist identification, data management, inspections, training, activities for prevention spread via cargo, like fumigation, and exercises. Rapid-response actions can create additional costs. Regional monitoring and shared laboratory contracts can reduce duplication of tests.

Stakeholder overview

Below is an overview of the required involved stakeholders.
Blue stakeholders are essential, white stakeholders are enabling

Knowledge base