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Phytoplankton community metrics based on absolute and relative abundance and biomass: implications for multivariate analyses.

Lavoie, Isabelle; Hamilton, Paul B.; Poulin, Michel (2011). Phytoplankton community metrics based on absolute and relative abundance and biomass: implications for multivariate analyses. Journal of Applied Phycology , vol. 23 , nº 4. p. 735-743. DOI: 10.1007/S10811-010-9573-Z.

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Résumé

Phytoplankton and water samples were collected at 12 locations along the temperate lowland Rideau River, Ontario, Canada. The stations were visited twice a month from May to September 1998, 1999, and 2000. Phytoplankton communities were quantified based on cell abundance, entity abundance (colonies, filaments or free-living cells) and biomass (converted from biovolume estimates based on cell shape and biometry), and were expressed as absolute and relative values. The resulting phytoplankton dataset was composed of six different metrics. The general objective was to assess which metric best explained the spatial and temporal variability in the phytoplankton communities of the Rideau River in response to fluctuating environmental variables. Relationships between phytoplankton metrics and water quality variables were assessed using canonical correspondence analyses. The absolute cell abundance metric showed the best relationship with water quality, followed by the cell entity metric. The biomass metric showed the poorest relationship with water quality variables, indicating that accounting for cell size does not provide additional information. The data expressed as absolute values were consistently better predictors of water quality compared to relative values.

Type de document: Article
Mots-clés libres: phytoplankton; lotic system; metrics; cell abundance; entity abundance; biomass; multivariate analysis
Centre: Centre Eau Terre Environnement
Date de dépôt: 08 janv. 2021 14:47
Dernière modification: 08 janv. 2021 14:47
URI: http://espace.inrs.ca/id/eprint/10628

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