We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Ocean acidification enhances the tolerance of dinoflagellate Prorocentrum donghaiense to nanoplastic-induced oxidative stress by modulating photosynthetic performance
AI summary Read the abstract
The dinoflagellate Prorocentrum donghaiense exposed to both nanoplastics and ocean acidification conditions showed that elevated CO₂ enhanced tolerance to nanoplastic-induced oxidative stress by modulating photosynthetic performance, suggesting complex interactions between these stressors.
Introduction The impact of ocean acidification (OA) and nanoplastics (NPs) on harmful algal blooms (HAB) has emerged as a major global concern. However, the combined effects of OA and NPs on the HAB species are poorly understood. Methods In this study, dinoflagellate Prorocentrum donghaiense , a typical HAB species, was exposed to varying concentrations of NPs (108.15 ± 8.52 nm) (0, 5, 10, and 15 mg L −1 ) and CO 2 (low CO 2 : 417 ppm, pH: 8.00 and high CO 2 : 1045 ppm, pH: 7.73) for seven days to investigate the combined effects of OA and NPs. Results and discussion The findings revealed that NPs inhibited the growth of P. donghaiense by inducing oxidative stress, as indicated by elevated malondialdehyde (MDA) content and decreased carotenoid/chlorophyll-a ratio, even though photochemical efficiency (φ P0 , ψ 0 , and φ E0 ), rETR max and α were enhanced in response to NPs stress. However, OA promoted the growth and alleviated the adverse effects of NPs on P. donghaiense by increasing photochemical efficiency (φ P0 , ψ 0 , and φ E0 ) and energy flux (RC/CS 0 , TR 0 /CS 0 , ET 0 /CS 0 ) and enhancing the antioxidant ability (increased superoxide dismutase, and decreased MDA). P. donghaiense showed enhanced tolerance to NPs under simulated OA conditions. These findings enhance our knowledge of the HAB species response to NPs pollution under future OA scenarios.
More Papers Like This
Elevated pCO2 alleviates the toxic effects of polystyrene nanoparticles on the marine microalga Nannochloropsis oceanica
AI summary Read the abstract
Researchers found that simulated ocean acidification (elevated CO2) significantly reduced the toxicity of polystyrene nanoparticles to the marine microalga Nannochloropsis oceanica, likely because acidic conditions caused nanoparticles to aggregate into larger, less bioavailable clusters and promoted ribosomal protein synthesis that helped cells cope with nanoparticle stress.
Dual impacts of elevated pCO2 on the ecological effects induced by microplastics and nanoplastics: A study with Chlamydomonas reinhardtii
AI summary Read the abstract
Researchers examined how freshwater acidification from elevated carbon dioxide interacts with polystyrene micro- and nanoplastics to affect a common green algae species. They found that smaller nanoplastics caused greater harm than larger microplastics, primarily through oxidative stress, while acidification alone actually promoted algal growth. The study reveals that climate change and plastic pollution can interact in unexpected ways, with acidification sometimes masking or modifying the toxic effects of plastic particles.
Nanoplastics and ocean warming: Combined impact on physiology and surface properties of the marine microalga Dunaliella tertiolecta
AI summary Read the abstract
Researchers investigated whether ocean warming amplifies the toxicity of amine-modified polystyrene nanoplastics in the marine microalga Dunaliella tertiolecta. Elevated temperature increased nanoplastic toxicity, worsening reactive oxygen species production, oxidative stress, and cell surface changes, suggesting climate change will intensify nanoplastic hazards to marine primary producers.
Impacts of microplastic and seawater acidification on unicellular red algae: Growth response, photosynthesis, antioxidant enzymes, and extracellular polymer substances
AI summary Read the abstract
Researchers examined the individual and combined effects of polystyrene microplastics and seawater acidification on unicellular red algae, which play an important role in marine primary production. They measured impacts on growth, photosynthesis, antioxidant enzyme activity, and extracellular polymer production. The study found that the combined stressors had more pronounced effects than either one alone, suggesting that ocean acidification may worsen the ecological impact of microplastic pollution on marine algae.
Toxicity of microplastics and nano-plastics to coral-symbiotic alga (Dinophyceae Symbiodinium): Evidence from alga physiology, ultrastructure, OJIP kinetics and multi-omics
AI summary Read the abstract
Researchers studied how microplastics and nanoplastics damage Symbiodinium, the algae that live inside coral and keep reefs alive. Even at concentrations found in the real environment, the plastic particles disrupted photosynthesis, caused oxidative stress, and triggered metabolic problems in the algae. Since the breakdown of this coral-algae partnership leads to coral bleaching, microplastic pollution could threaten the reef ecosystems that support fisheries and coastal communities worldwide.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.