DeterminingOptimalGrowth Conditions for theHighest BiomassMicroalgae Species inLithuanian Part of theCuronianLagoon for furtherCultivation

Document Type: Original Research Paper

Authors

1 Klaipeda University, H. Manto Str. 84, LT-92294 Klaipėda, Lithuania

2 Nature Research centre,Akademijos Str. 2, LT-08412Vilnius, Lithuania

Abstract

Anthropogenic eutrophication conditioned frequent and more pronounced blooms of toxic
algae and cyanobacteria in the fresh and saline aquatic ecosystems all world around. However, blooming
species could serve as a possible resource instead of a threat by exploiting them to remediate nutrients. The
optimised use of algae and cyanobacteria may provide the environmental service together with economic
benefit that could be obtained from their biomass. The aim of this study was to identify microalgae species
from Curonian Lagoon that could be prospective candidates for cultivation in Lithuania, and statistically
determine how the accumulation of their biomass correlated with the changes in environmental conditions,
using five years monitoring data. Five species, frequently acquiring a much larger biomass (up to 70 mg/
L) over other species, were identified: Aphanizomenon flos-aquae, Planktothrix agardhii, Actinocyclus
normanii f. subsalsus, Diatoma tenuis and Stephanodiscus rotula. The optimal cultivation conditions
were proposed based on results of the analysis and the potential their biomass applications are discussed.

Keywords