Articles | Volume 26, issue 1
https://doi.org/10.3285/eg.26.1.11
© Author(s) 1975. This work is distributed under
the Creative Commons Attribution 3.0 License.Der ökologische Indikatorwert mitteleuropäischer Pisidium-Arten (Mollusca, Eulamellibranchiata)
Abstract. The presently known ecological valences and requirements of recent species of pill-clams (Pisidium C. Pfeiffer) in Central Europe are briefly reviewed. Species of low indicator value (e. g. P. subtruncatum, milium) are contrasted with those having a high indicator value (e. g. P. supinum, lilljeborgii). The necessity of taking into account the abundance of species, rather than merely their presence, is emphasized.