- The symbiotic relationship can either be facultative mutualism, parasitic or commensal for the Hakea. It is not obligate, as it can live without the symbiont.
- For the shrub it might by obligate - either it is parasitic or commensal.
To test what kind of relationship it is you would need to set up a test the growth of the following groups:
- Hakea by itself
- Shrub by itself
- Shrub and Hakea together
From these tests measure:
- Whether the species grows by itself or only with the other - this would indicate whether the relationship is obligate or facultative
- Whether any of the species are impeded by the growth of the other, this may indicate a parasitic relationship or commensal