, Volume 570, Issue 1, pp 89–93 | Cite as

Seasonal variability in the palatability of freshwater macrophytes: a case study

  • A. ElgerEmail author
  • M. H. Barrat-Segretain
  • N. J. Willby


The pond snail Lymnaea stagnalis (L.) was used for a laboratory assessment of seasonal variation in palatability of three freshwater macrophytes: Potamogeton lucens, Elodea canadensis and E. nuttallii. For each species, 2–5 populations were investigated in spring and in summer. Preliminary results showed that the feeding rate of similarly-aged snails bred under standard conditions was stable over time. In contrast, snail feeding rate on the three macrophyte species decreased from spring to summer, which was therefore interpreted as a decrease in plant palatability. This decrease was probably due to tissue maturation, as suggested by the concomitant increase in the dry matter content of leaves of the three species. The high palatability of the species studied during the spring may prove detrimental in cases of strong herbivore pressure, and could have consequences for macrophyte distribution among aquatic habitats.


aquatic plants dry matter content herbivory Lymnaea stagnalis phenology 


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Copyright information

© Springer 2006

Authors and Affiliations

  • A. Elger
    • 1
    • 3
    Email author
  • M. H. Barrat-Segretain
    • 1
  • N. J. Willby
    • 2
  1. 1.UMR CNRS 5023, Ecologie des Hydrosystèmes FluviauxUniversité Claude Bernard Lyon 1Villeurbanne cedexFrance
  2. 2.School of Aquatic SciencesUniversity of StirlingStirlingUK
  3. 3.UMR CNRS 5172, Dynamique de la BiodiversitéUniversité Paul Sabatier Toulouse 3France

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