Tropical coastal seas are overlooked hotspots of Pseudo-nitzschia diversity.
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| Main Authors: | , , , , , |
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| Format: | Artículo científico |
| Language: | en |
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Harmful algae
2026
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| _version_ | 1868266084854923265 |
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| author | Niu, Biaobiao Liang, Cuiwen Yue, Fang Wu, Shiyu Li, Yang Lu, Songhui |
| author_facet | Niu, Biaobiao Liang, Cuiwen Yue, Fang Wu, Shiyu Li, Yang Lu, Songhui Niu, Biaobiao Liang, Cuiwen Yue, Fang Wu, Shiyu Li, Yang Lu, Songhui |
| collection | PubMed - marine biology |
| contents | Tropical coastal seas are overlooked hotspots of Pseudo-nitzschia diversity. Niu, Biaobiao Liang, Cuiwen Yue, Fang Wu, Shiyu Li, Yang Lu, Songhui Diatoms Biodiversity Marine Toxins China Kainic Acid Tropical Climate Oceans and Seas Pseudo-nitzschia is a globally distributed diatom genus with multiple domoic-acid (DA)-producing species that pose ecological and economic risks. Although tropical waters have recently been hypothesized to host rich Pseudo-nitzschia diversity, their actual diversity, cryptic lineages and toxin-environment relationships remain unclear. Here, we conducted a large-scale summer survey across 65 stations along the Chinese coast of the South China Sea using ITS1 metabarcoding, haplotype network analysis and LC-MS/MS toxin quantification. We identified 50 taxa, including four novel phylotypes and 26 newly recorded in this region, representing the highest richness level documented worldwide. Substantial intraspecific divergence occurred in dominant species, especially P. galaxiae, suggesting a cryptic species complex and ongoing diversification. Dissolved DA (dDA) occurred at 75.4% of stations, with a content of 7.7-351.4 ng L. The higher toxin levels coincided with the co-occurrence of several toxigenic species despite their low relative abundance ( |
| format | Artículo científico |
| id | pubmed_41708192 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | Harmful algae |
| record_format | pubmed |
| spellingShingle | Tropical coastal seas are overlooked hotspots of Pseudo-nitzschia diversity. Niu, Biaobiao Liang, Cuiwen Yue, Fang Wu, Shiyu Li, Yang Lu, Songhui Diatoms Biodiversity Marine Toxins China Kainic Acid Tropical Climate Oceans and Seas Tropical coastal seas are overlooked hotspots of Pseudo-nitzschia diversity. Niu, Biaobiao Liang, Cuiwen Yue, Fang Wu, Shiyu Li, Yang Lu, Songhui Diatoms Biodiversity Marine Toxins China Kainic Acid Tropical Climate Oceans and Seas Pseudo-nitzschia is a globally distributed diatom genus with multiple domoic-acid (DA)-producing species that pose ecological and economic risks. Although tropical waters have recently been hypothesized to host rich Pseudo-nitzschia diversity, their actual diversity, cryptic lineages and toxin-environment relationships remain unclear. Here, we conducted a large-scale summer survey across 65 stations along the Chinese coast of the South China Sea using ITS1 metabarcoding, haplotype network analysis and LC-MS/MS toxin quantification. We identified 50 taxa, including four novel phylotypes and 26 newly recorded in this region, representing the highest richness level documented worldwide. Substantial intraspecific divergence occurred in dominant species, especially P. galaxiae, suggesting a cryptic species complex and ongoing diversification. Dissolved DA (dDA) occurred at 75.4% of stations, with a content of 7.7-351.4 ng L. The higher toxin levels coincided with the co-occurrence of several toxigenic species despite their low relative abundance ( |
| title | Tropical coastal seas are overlooked hotspots of Pseudo-nitzschia diversity. |
| topic | Diatoms Biodiversity Marine Toxins China Kainic Acid Tropical Climate Oceans and Seas |
| url | https://pubmed.ncbi.nlm.nih.gov/41708192/ |