| dc.contributor.author | Sathish, K. | |
| dc.contributor.author | Patil, J. S. | |
| dc.contributor.author | Anil, A. C. | |
| dc.date.accessioned | 2025-11-04 | |
| dc.date.accessioned | 2025-11-04T09:45:48Z | |
| dc.date.available | 2025-09-15 | |
| dc.date.available | 2025-11-04T09:45:48Z | |
| dc.date.issued | 2025 | |
| dc.identifier.citation | Marine Biology Research, vol.21(4 5);2025;pp.183 197. https://doi.org/10.1080/17451000.2025.2512083 | |
| dc.identifier.issn | 1745-1000 | |
| dc.identifier.other | https://www.tandfonline.com/doi/full/10.1080/17451000.2025.2512083 | |
| dc.identifier.uri | https://doi.org/10.1080/17451000.2025.2512083 | |
| dc.identifier.uri | http://drs.nio.res.in/drs/handle/2264/9557 | |
| dc.description | IF2024=1.2 | |
| dc.description.abstract | The roles of biotic factors (grazing/senescence) in chlorophyll a (Chl a) breakdown (CB) to non-fluorescence derivatives in a multistep pathway are frequently reported. In aquatic microalgae, the information on CB-pathway is scarce compared to land plants. The enzymatic activities (e.g. chlorophyllase dephytalation; pheophytinase demetalation) involved in CB vary significantly among phytoplankton species, but how this influences the CB-pathway is unknown, and delineating the same will aid in determining the fate of high microalgal biomass, particularly blooms. The grazing experiments using three species of bloom-forming marine phytoplankton (Skeletonema costatum (Bacillariophyceae), Dunaliella tertiolecta (Chlorophyceae) and Amphidinium carterae (Dinophyceae)) and mixed natural assemblage confirmed that the CB-pathway under grazing-pressure is species-specific and the grazer s feeding habits. In Dunaliella and Amphidinium, with and without chlorophyllase-activity, respectively, higher pheophytin, and lower pheophorbide formation suggested the Chl a pheophytin pheophorbide pathway. Skeletonema with high chlorophyllase activity produced higher pheophorbide suggesting CB through the Chl a-chlorophyllide pheophorbide pathway. In the presence of grazers, the pheophorbide: pheophytin ratio was several times higher in Skeletonema (3-40) than others (0.1-<1) suggesting a potential proxy for determining Chl a chlorophyllide pheophorbide (>1) or Chl a pheophytin pheophorbide pathway (<1) dominance. This study emphasises that using CB pathway indicator to assess bloom fate will advance microalgal bloom research and ecosystem evaluation. | |
| dc.language | en | |
| dc.publisher | Taylor and Francis Online | |
| dc.relation.isreferencedby | SCI | |
| dc.rights | Only the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations | |
| dc.title | Taxa specific grazing-induced phytoplankton chlorophyll breakdown pathway: implication in algal bloom monitoring and mitigation programs | |
| dc.type | Journal Article | |
| dc.affiliation.author | CSIR-National Institute of Oceanography, Dona Paula, Goa, India | |