Effects of ocean acidification on copepods

Area of Science:

• Marine Biology
• Oceanography
• Ecotoxicology

Background:

• Ocean acidification (OA) alters seawater chemistry, posing a global threat to marine ecosystems.
• Copepods are vital in marine food webs, transferring energy from primary producers to higher trophic levels.
• Previous studies show species-specific and stage-dependent responses of copepods to OA, with varying sensitivities among populations.

Purpose of the Study:

• To examine the impacts of ocean acidification on the biological traits of copepods, focusing on growth and reproduction.
• To investigate how OA effects are influenced by co-stressors such as thermal stress, food deprivation, and metal pollution.
• To highlight the need for long-term, multigenerational exposure studies and the utility of omics technologies.

Main Methods:

• Review of existing studies on copepod responses to ocean acidification.
• Analysis of species-specific and stage-dependent responses to increased pCO2.
• Consideration of synergistic effects of OA with co-occurring stressors.

Main Results:

• Copepods exhibit varied responses to OA, influenced by species, life stage, and population.
• Deleterious effects of OA can be amplified by other environmental stressors.
• Short-term exposure studies may underestimate the full impact of OA on copepod populations.

Conclusions:

• Multigenerational exposure experiments under combined stressors are essential for accurate OA impact assessment.
• Omics technologies (genomics, proteomics, metabolomics) are crucial for understanding mechanistic responses.
• Improved predictions of copepod responses to climate change stressors, including OA, are needed.