Part B of 420793 Essay Example

  • Category:
    Other
  • Document type:
    Assignment
  • Level:
    High School
  • Page:
    1
  • Words:
    595

Weed Risk Assessment Question Sheet

Answer yes (Y) or no (N), or don’t know (leave blank or ?), unless otherwise indicated

Botanical name:

Outcome:

History/Biogeography

Domestication/

Is the species highly domesticated. If answer is ‘no’ go to question 2.01

cultivation

Has the species become naturalised where grown

Does the species have weedy races

Climate and

Species suited to Australian climates (0-low; 1-intermediate; 2-high)

Distribution

Quality of climate match data (0-low; 1-intermediate; 2-high)

Broad climate suitability (environmental versatility)

Native or naturalised in regions with extended dry periods

Does the species have a history of repeated introductions outside its natural range

Naturalised beyond native range

elsewhere

Garden/amenity/disturbance weed

Weed of agriculture/horticulture/forestry

Environmental weed

Congeneric weed

Biology/Ecology

Undesirable

Produces spines, thorns or burrs

Allelopathic

Parasitic

Unpalatable to grazing animals

Toxic to animals

Host for recognised pests and pathogens

Causes allergies or is otherwise toxic to humans

Creates a fire hazard in natural ecosystems

Is a shade tolerant plant at some stage of its life cycle

Grows on infertile soils

Climbing or smothering growth habit

Forms dense thickets

Plant type

Nitrogen fixing woody plant

Geophyte

Reproduction

Evidence of substantial reproductive failure in native habitat

Produces viable seed

Hybridises naturally

Self-fertilisation

Requires specialist pollinators

Reproduction by vegetative propagation

Minimum generative time (years)

Dispersal

Propagules likely to be dispersed unintentionally

mechanisms

Propagules dispersed intentionally by people

Propagules likely to disperse as a produce contaminant

Propagules adapted to wind dispersal

Propagules buoyant

Propagules bird dispersed

Propagules dispersed by other animals (externally)

Propagules dispersed by other animals (internally)

Persistence

Prolific seed production

attributes

Evidence that a persistent propagule bank is formed (>1 yr)

Well controlled by herbicides

Tolerates or benefits from mutilation, cultivation or fire

Effective natural enemies present in Australia

A= agricultural, E = environmental, C= combined

Weed risk assessment scoring sheet

Question

Response

0

0

Only score 1.02 and 1.03 if you answered yes to 1.01.

The response for these two questions is 2 unless

a climate analysis is done

0

0

0

0

0

Refer to Lookup table for section 3 (see below)

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

part B of 420793

Lookup table for 6.07

0

Total score

See procedure for scoring assessment

Agricultural score

Environmental score

Lookup table for section 3

Locate value of inputs and lookup output for each

Yes to questions 3.01 – 3.05

0

0

0

0

0

0

No to questions 3.01 – 3.05

0

3.02-3.05

0

0

0

Procedure for scoring assessment

  • Record appropriate responses in column b (transfer it from weed Risk assessment Question Sheet).

  • Look up score in columns d (N score = score if you recorded no) and e (Y score = if you recorded yes) and record result in column c.

  • Calculate total score by adding up the values in column c.

  • Fill in outcome (If your total score is <1 then allow entry of plant into the country, i.e. it is a safe bet it will not become a weed. If your total score is between 1 and 6 then more evaluation is needed. If your total score is >6 then reject entry of plant into the country, i.e. it is likely to become a weed.

  • Verify that a minimum number of questions from each section are answered, i.e. from section A – 2 questions, section B – 2 questions, section C – 6 questions.

  • Compute Agricultural (A&C) and Environmental (E&C) scores. If either score is less than 1, the outcome pertains to the other sector.