Resumo

LOPEZ FUERTE, Francisco Omar; SIQUEIROS BELTRONES, David A.  e  DE LA CRUZ AGUERO, Gustavo. Weighed biovolume; an index for estimating the contribution of species in benthic diatom assemblages. Hidrobiológica [online]. 2007, vol.17, n.1, pp.83-86. ISSN 0188-8897.

With the purpose of deriving an alternative way for assessing the contribution of diatom taxa in benthic assemblages to biomass, the weighed biovolume index (WBV) is here proposed. The biovolumen (BV) was computed for taxa collected from intertidal mangrove sediments. The taxa were selected on the basis of total abundances (TA) and linear size. The TA and BV values showed an apparent inverse relation. In this way, the combined use of these variables is proposed (as WBV) as a more precise approximation to the contribution (as biomass) of each taxon in the assemblage. Thus, the WBV is computed as the product of the total abundances (TA) times the BV for each taxon, divided by the Σ BV(AT) of all the taxa in the sample and expressed as percentage.

Palavras-chave : Biovolume; total abundances; benthic diatoms.

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