Anthropogenic stressors increasingly cause ecosystem-level changes to sensitive
marine habitats
such as coral reefs. Intensification of coastal development and
shipping traffic can increase nutrient and oil pollution on coral reefs,
yet these two stressors have not been studied in conjunction. Here, we
simulate a disturbance scenario exposing carbonate settlement tiles to
nutrient and oil pollution in a full-factorial design with four
treatments: control, nutrients, oil, and combination to examine
community structure and net primary productivity (NPP) of pioneer
communities throughout 28 weeks. Compared to the control treatment oil
pollution decreased overall settlement and NPP, while nutrients
increased turf algae and NPP. However, the combination of these two
stressors resulted in similar community composition and NPP as the
control. These results indicate that pioneer communities may experience
shifts due to nutrient enrichment, and/or oil pollution. However, the
timing and duration of an event will influence recovery trajectories
requiring further study.