Abstract
This study analyzes the influence of abiotic factors on the microalgae in marine coastal saline soils. The analysis revealed 38 species of microalgae in the studied area. Cyanobacteria comprised the largest proportion of the found species. The species richness and biodiversity indicators depend on soil moisture, while relative abundance negatively correlates with chloride content. The results of permutational multivariate analyses of variance showed a marginal influence of moisture and sodium on the structure of microalgal communities. The factors beyond chemical properties and soil moisture (e.g. surge-related (tidal) phenomena) explain the observed microalgal quantitative and qualitative features. Leptolyngbya foveolarum and Micractinium sp., owing to their high values of occurrence frequency and relative abundance, may hold potential for the biological optimization of saline soils.