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Biodiversity and functional trait effects on copper toxicity in a proof-of-concept multispecies microalgal assay

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dc.contributor.authorJoonas, Elise
dc.contributor.authorOlli, Kalle
dc.contributor.authorKahru, Anne
dc.contributor.authorAruoja, Villem
dc.date.accessioned2023-03-22T09:47:38Z
dc.date.available2023-03-22T09:47:38Z
dc.date.issued2021
dc.description.abstractThis study aimed to elucidate biodiversity effects on algal biomass production under toxicant stress and to increase environmental realism in ecotoxicological testing by exposing artificial algal communities to Cu2+. All 15 possible combinations of four functionally distinct microalgal species (green algae Chlamydomonas reinhardtii and Raphidocelis subcapitata, diatom Fistulifera pelliculosa and cyanobacterium Synechocystis sp.) were exposed to 0.01 and 0.02 mg Cu2+ l􀀀 1 in a modified algal growth inhibition assay (OECD 201). Compared to monocultures, the replicability of assays in multispecies communities decreased. Copper-induced inhibition of the biomass yield of individual species did not change due to interactions between species in multispecies tests, indicating that Cu toxicity was the driver of competitive outcomes. Biomass yield was increased at higher species richness in controls and Cu-exposed treatments. Selection effect is considered to prevail over trait complementarity in our experiments, because functional diversity, that expresses species trait variability and equality in species’ occurrence, had a negative effect on algal biomass yield, while species richness increased the yield. Algal functional traits related to cell size were the best predictors of microalgal biomass production. Species identity was identified as an important determinant of community-level outcomes.eng
dc.description.abstractThis research was supported by the Estonian Research Council projects PSG311, PRG684 and PUT1574 and by ERDF projects TK134 and NAMUR+ 2014-2020.4.01.16-0123. We thank Laura Kaarma for her help with capturing micrographs of the algae for the manuscript.eng
dc.description.sponsorshipThis research was supported by the Estonian Research Council projects PSG311, PRG684 and PUT1574 and by ERDF projects TK134 and NAMUR+ 2014-2020.4.01.16-0123. We thank Laura Kaarma for her help with capturing micrographs of the algae for the manuscript.eng
dc.identifier.issn2211-9264
dc.identifier.publicationAlgal Research 55 (2021) 102204eng
dc.identifier.urihttp://hdl.handle.net/10492/8006
dc.identifier.urihttps://doi.org/10.1016/j.algal.2021.102204
dc.publisherElsevier
dc.rights© 2021 Elsevier B.V. All rights reserved.eng
dc.subjectaquatic ecotoxicityeng
dc.subjectmetal toxicityeng
dc.subjectmultispecies assayeng
dc.subjectfunctional diversityeng
dc.subjectecosystem functioningeng
dc.subjectarticleseng
dc.titleBiodiversity and functional trait effects on copper toxicity in a proof-of-concept multispecies microalgal assayeng
dc.typeArticleeng

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