"Higher category";"Heading/ Impact";Interpretation "Impact on ecosystem processes and system-wide parameters";"Fire properties";"The species alters fire frequency, intensity or timing (of the fire regime)." "If species only occurs in forest, it is unlikely to impact on fire, because fire is not part of the system (No)." "If the species is only ruderal, it is not likely to impact on fire (No)." Geomorphology;"The species affects erosion, sedimentation processes or geo-engineers soil structure or geomorphological processes." "Hydrological regimes";"The species affects run-off and other hydrological process like flow rate, the frequency of flood events or timing and seasonality of water flow – or could change the “pattern” – physical water course." "Nutrient/Mineral dynamics";"The species alters the nutrient or mineral content of its environment (soil or water). This includes eutrophication. This can be marked yes in addition to the column “pH, salinity, alkalinity”." Light;"The species affects the amount of light filtering to layers below it (in water or sub-canopy)." "Yes – based on the habitat the species invades, and the structure of the plant, it is likely to affect the amount of light that reaches the layer directly below it." "Unknown – it is unclear from the species structure and habitat whether light is affected." "No – light not affected (e.g. species low growing terrestrial species)." "pH, salinity, alkalinity";"The species affects the pH, salinity or alkalinity of the medium in/on which it occurs. This can be marked yes in addition to the column “Nutrient/Mineral dynamics”." "Yes – species where this has been recorded." "Unknown - alleopathic species have the potential to alter pH." "No – no evidence of altering pH and unlikely to do so because of life-form (e.g. vine) or other traits." "Impact on community structure";"Physical structure";"The species adds (or removes) a new layer to the community (e.g. tree in shrub-land, aquatic plants where no plants previously covered the water)." "Impact on community composition";Facilitation;"The species facilitates the invasion of other aliens." "Yes – must directly facilitate the invasion or dispersal of another alien species (e.g. by providing food for the species)." "Alteration of successional process";"This species alters successional processes in areas where low level disturbance is common (e.g. flood plains). Also includes species that change the disturbance regime (e.g. creation of gaps or disturbed areas)." "Impact on individual indigenous species";Competition;"The species competes with native species." Hybridization;"The species can hybridise with related native species." "Poison / allelopathy / stinging";"The species may poison, sting or have allelopathic effects on other species." "Species interactions";"Disruption of ecological interactions";"The species disrupts native ecological interactions (including any mutualisms (e.g. seed dispersal), predator prey interactions, pollination, herbivory or other trophic interactions)." "Interactions include:" "Disruption of native seed (or fruit) dispersal due to provision of alternate food source." "Effects on plant herbivore interactions by displacing food sources (e.g. unpalatable grass), breeding sites and habitat (e.g. of birds, fish and crocodiles) transformed until the species can no longer use a river." "Alteration of food webs (e.g. trophic cascade)." "Species that only restrict movement without demonstrating disruption of an interaction were excluded."