Functional biodiversity loss along natural CO₂ gradients

Area of Science:

• Marine Biology
• Ecology
• Climate Change Science

Background:

• Environmental change impacts on biodiversity are not well understood.
• Consequences of species composition shifts for marine ecosystem function remain largely unknown.

Purpose of the Study:

• Assess the loss of functional diversity in benthic marine communities under ocean acidification.
• Investigate the role of natural CO2 vent systems as a model for ocean acidification impacts.

Main Methods:

• Utilized natural CO2 vent systems to simulate ocean acidification.
• Examined changes in functional diversity (range of species biological traits) in benthic communities.
• Compared functional diversity loss to taxonomic diversity loss.

Main Results:

• Functional richness was significantly reduced in acidified conditions.
• Functional diversity loss was more pronounced than taxonomic diversity loss.
• Acidified conditions led to low functional redundancy, with organisms clustering into few functional entities.

Conclusions:

• Functional richness is not buffered by functional redundancy under ocean acidification.
• Ocean acidification poses a significant threat to marine ecosystem function, even in diverse habitats.
• Benthic communities exhibit vulnerability to ocean acidification impacts on functional traits.