 B. telmatiaea is a fairly secure species , as most populations are of more than 100 plants , and 26 % of known plants are in conservation reserves . Its proximity to Perth suggests that land clearing for urban development could pose a threat , and in 1988 The Banksia Atlas recommended that " the species should continue to be monitored since land clearing could change the situation greatly , particularly amongst its northern populations . " It is also known to be susceptible to dieback caused by the introduced plant pathogen Phytophthora cinnamomi , a soil @-@ borne water mould that causes root rot ; in fact it is so reliably susceptible that it used as an indicator species for the presence of the disease . An assessment of the potential impact of climate change on this species found that severe change is likely to lead to extinction ; but under less severe change scenarios the distribution may actually grow , depending on how effectively it can migrate into newly habitable areas . 
