The Role of Phytoplankton as an Indicator of Trophic Status and Primary Productivity in Marine Waters
Published:
2026-05-20Downloads
Abstract
Phytoplankton are fundamental components of marine ecosystems because they function as primary producers and sensitive ecological indicators of environmental change. This study aimed to analyze the role of phytoplankton as indicators of trophic status and primary productivity in marine waters through a literature synthesis approach. The research employed a literature review method using a narrative-systematic review design based on PRISMA guidelines by analyzing 78 international scientific articles published between 2009 and 2024 from Scopus, Web of Science, and Google Scholar databases. Data were analyzed using thematic synthesis to identify relationships among phytoplankton community structure, trophic conditions, and primary productivity. The results showed that phytoplankton abundance, chlorophyll-a concentration, biomass, and taxonomic composition were strongly influenced by nutrient dynamics, temperature, water column stratification, and oceanographic processes such as upwelling. Dinoflagellates and cyanobacteria tended to dominate under eutrophic conditions, whereas small-sized phytoplankton were more prevalent in oligotrophic waters. In conclusion, phytoplankton are effective bioindicators for assessing trophic status and marine primary productivity. These findings highlight the importance of integrating biological and oceanographic parameters in marine ecosystem monitoring to support sustainable coastal management.
Keywords:
chlorophyll-a eutrophication phytoplankton primary productivityReferences
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