deletions | additions       diff --git a/Rationale_and_Significance_3_4__.md b/Rationale_and_Significance_3_4__.md  index d38c7e3..764cb5e 100644  --- a/Rationale_and_Significance_3_4__.md  +++ b/Rationale_and_Significance_3_4__.md 
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http://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.1001419  - this has some #s on currently known diversity + estimates in a section on "The Unknown Vastness of Protist Richness"  Fungal associations have been found to have beneficial effects on terrestrial plant fitness; for example, mycorrhizal fungi are involved in facilitating phosphorus and nitrogen uptake for their hosts.   It is estimated that there are more than 10,000 marine fungi but only around 550 currently have cultured representatives \cite{Jones_2011} \cite{Jones_2015}