To conclude, given the lack of manipulative studies to discern
suitability of bioindicator species, and lack of nutrient passive sampler
technology, this novel study demonstrates the usefulness of
the common brown macroalgae species, S. flavicans, as a potential
bioindicator of nutrient enrichment, to determine bioavailable uptake
from industrial refinery loading into estuarine and marine
environments. In particular, d15N values were the most sensitive
endpoints to determine biological uptake in the brown algae.