Assertion: diatom's role | /r/HasProperty | crucial
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Source sentences:
text: They're so tiny you can't usually see them without a microscope, but despite their miniscule size, diatoms play a crucial role in one of the largest ecosystems on the planet.
text: They play crucial roles in global carbon assimilation and ecosystem productivity, because it has been estimated that diatoms assimilate at least 20% of the COon Earth and contribute to about 40% of the annual marine primary productivity ().Furthermore, diatoms potentially can be an important source of biofuel; many studies in recent years have explored using the energy stored in the lipid droplets of diatoms to produce biodiesel fuel().