Biomass as a proxy for available surface area in freshwater macrophytes: influence of seasonality - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles Aquatic Botany Year : 2017

Biomass as a proxy for available surface area in freshwater macrophytes: influence of seasonality

Utilisation de la biomasse comme un proxy de la surface des macrophytes : influence de la saison

Abstract

Estimating the available surface area of plants is of crucial importance for ecologists interested in epiphytic flora and fauna. However, surface area measurements can be highly time-consuming, especially in the case of heavy-branched macrophytes. The aim of this study is to investigate the relationship between biomass and plant surface, in order to use biomass as a proxy for surface area, and to search for eventual seasonal variability. We quantified the surface-biomass relationship (SBR) as well as the surface/biomass ratio (RSA) and tested the effect of season for five macrophytes: Chara fragifera, Juncus bulbosus, Lagarosiphon major, Lobelia dortmanna and Phragmites australis. Furthermore, we tested the influence of the sampling position along the stem for the submerged macrophyte Egeria densa. We found a significant correlation between surface area and biomass for all species, suggesting that biomass could be a good surrogate of surface area. However, the SBR and RSA of C. fragifera, L. dortmanna and P. australis varied significantly with the season. For the caulescent species E. densa, the position of the sampling shoot along the stem resulted significant, with a non-significant SBR in the basal section of the stem. We conclude that biomass can be used as a proxy of surface area, but recommend the calibration of models for each investigated species, sampling season and shoot fragment.

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Dates and versions

hal-02606478 , version 1 (16-05-2020)

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Aurélien Jamoneau, G. Jan, T. Petitcollin, C. Ribaudo. Biomass as a proxy for available surface area in freshwater macrophytes: influence of seasonality. Aquatic Botany, 2017, 142, pp.91-95. ⟨hal-02606478⟩

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