This element covers the accurate identification of invasive non-native flora and fauna, distinguishing them from native species. Learners will examine key
Topic Synopsis
This element covers the accurate identification of invasive non-native flora and fauna, distinguishing them from native species. Learners will examine key morphological characteristics and understand the ecological and economic threats these species pose. The practical application includes early detection and reporting to prevent establishment and spread.
Key Concepts & Core Principles
- Invasive non-native species (INNS): Species introduced outside their natural range that cause economic or environmental harm, such as Japanese knotweed (Fallopia japonica) and Himalayan balsam (Impatiens glandulifera).
- Injurious species: Plants listed under the Weeds Act 1959 (e.g., common ragwort, creeping thistle, spear thistle, curled dock, broad-leaved dock) that must be controlled to prevent spread to agricultural land.
- Identification features: Key characteristics for accurate ID, including leaf shape, stem colour, flower structure, and growth habit. For example, giant hogweed has purple-spotted stems and large, lobed leaves.
- Control methods: Integrated approaches including herbicide application (e.g., glyphosate for knotweed), mechanical removal (e.g., strimming ragwort before flowering), and biological control (e.g., using the psyllid bug for Japanese knotweed).
- Legal responsibilities: Duty to prevent the spread of injurious weeds under the Weeds Act 1959, and prohibition on planting or causing the spread of invasive species under the Wildlife and Countryside Act 1981 (Schedule 9).
Exam Tips & Revision Strategies
- Practice using identification guides and apps for common invasive species, focusing on distinctive features like leaf shape, flower structure, or body markings.
- During practical assessments, systematically check all key characteristics before concluding identification and cross-reference with official databases.
- Memorise the standard definitions of invasive non-native and native species as per official guidance (e.g., GB Non-native Species Secretariat).
- Be prepared to describe the correct reporting procedure, including who to contact, what information to provide, and follow-up actions.
- Review case studies of local invasive species threats to demonstrate understanding of both environmental and economic impacts.
Common Misconceptions & Mistakes to Avoid
- Confusing native species with similar-looking invasive species (e.g., mistaking Japanese knotweed for common bindweed).
- Assuming all non-native species are invasive rather than understanding the specific criteria of negative impact and spread.
- Misidentification due to relying on a single characteristic without using a comprehensive identification key.
- Failing to note the appropriate reporting hierarchy or biosecurity actions (e.g., not cleaning equipment after handling invasive species).
- Underestimating the ecological threat, viewing invasive species as merely a nuisance rather than a serious biosecurity risk.
Examiner Marking Points
- Award credit for accurately defining 'invasive non-native species' and 'native species' with industry-recognised terminology.
- Expect clear evidence of distinguishing between native and invasive species using reliable identification keys and characteristic features.
- Look for demonstration of correct identification procedures for at least two invasive plant species, two invasive insects, and two invasive vertebrates.
- Assess candidate's knowledge of appropriate actions upon identification, including recording location, notifying relevant authority, and implementing biosecurity measures.
- Credit should be given for explaining the environmental and economic threats posed by identified invasive species, with relevant local examples.