Abstract
In an ecological study of the freshwater sponge, Metania spinata (Metaniidae), in Lagoa Dourada reservoir, River Lobo watershed, Brazil, we found substantial seasonal variation in biomass and productivity and related them to environmental variables (climatic and hydrologic). Sponges were sampled monthly by the quadrat technique, from March 1989 to April 1990, at two sites near the dam in order to estimate the seasonal population dynamics. Biomass peaks were found in spring/summer, with gemmulation occurring from March to September (autumn/winter). The minimal production of M. spinata during the period of study was estimated as the difference between the highest and the lowest biomass, 33.54 gAFDM m-2 yr-1, yielding a P/B ratio of 2.72.
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Melão, M.d.G.G., Rocha, O. Biomass and productivity of the freshwater sponge Metania spinata (Carter, 1881) (Demospongiae: Metaniidae) in a Brazilian reservoir. Hydrobiologia 390, 1–10 (1998). https://doi.org/10.1023/A:1003522316911
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DOI: https://doi.org/10.1023/A:1003522316911