Allelopathic effects of the aquatic macrophyte Ceratophyllum demersum L. on phytoplankton species: contrasting effects between cyanobacteria and chlorophytes

Abstract Aim To assess the allelopathic effects of the submerged macrophyte Ceratophyllum demersum on four strains of phytoplankton species: two cyanobacteria (Microcystis aeruginosa - microcystin producing and M. panniformis - non-microcystin producing), and two chlorophytes (Ankistrodesmus falcatu...

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Bibliographic Details
Published in:Acta limnológica brasiliensia 2019, Vol.31, p.1-10
Main Authors: Amorim, Cihelio Alves, Moura-Falcão, Rafael Henrique de, Valença, Celina Rebeca, Souza, Vitor Ricardo de, Moura, Ariadne do Nascimento
Format: Article
Language:eng ; por
Subjects:
alelopatia
Algae
Allelochemicals
Allelopathy
Ankistrodesmus falcatus
Aquatic plants
Biomanipulation
biomanipulação
Biomass
Blooms
Ceratophyllum demersum
Coexistence
controle de cianobactérias
Culture media
Cyanobacteria
Ecology
experimentos de coexistência
Freshwater plants
Growth rate
Laboratories
Lakes
LIMNOLOGY
macrófitas submersas
Microcystins
Microcystis
Microcystis aeruginosa
Phytoplankton
Plankton
Raphidocelis subcapitata
Species
Toxicology
Toxins
Variance analysis
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Summary:Abstract Aim To assess the allelopathic effects of the submerged macrophyte Ceratophyllum demersum on four strains of phytoplankton species: two cyanobacteria (Microcystis aeruginosa - microcystin producing and M. panniformis - non-microcystin producing), and two chlorophytes (Ankistrodesmus falcatus and Raphidocelis subcapitata). Methods A coexistence experiment between C. demersum and the four strains was carried out for six days, with eight treatments and three replicates. The strains were cultivated in ASM1 culture medium, under controlled laboratory conditions. Two treatments were assigned for each strain, one with 6 g.L-1 of the macrophyte, and the control without the plant. Biomasses and growth rates of the strains were evaluated every two days, which were compared through the T-test and two-way ANOVA, respectively. Results The results varied among the strains, with toxic M. aeruginosa being intensely inhibited by C. demersum, with a decrease of 99.5% in its biomass (p
ISSN:2179-975X
0102-6712
2179-975X
DOI:10.1590/s2179-975x1419