Abstract
We describe a new species of Cephalodella, C. acidophila n. sp., from the plankton of two extremely acidic mining lakes (pH Cephalodella delicata Wulfert. It shares with the latter an almost identical trophi morphology and anatomical organization, but differs clearly by form and length of its toes, larger body size, and ecology. Laboratory experiments revealed that the species is acidophilic, i.e. it thrives at low pH (Chlamydomonas acidophila. The easily cultured species has previously been used in various experimental studies, but has only now been recognized as an undescribed species.References
Bell, E.M. & Weithoff, E. (2003) Benthic recruitment of zooplankton in an acidic lake. Journal of experimental Marine Biology and Ecology, 285/286, 205– 219.
De Smet, W.H. (1998) Preparation of rotifer trophi for light and scanning electron microscopy. Hydrobiologia, 387/388, 117–121.
Deneke, R. (2000) Review of rotifers and crustaceans in highly acidic environments of pH values < 3. Hydrobiologia, 433, 167–172.
Hartwich, M., Wacker, A. & Weithoff, G. (2010) Changes in competitive abilities of two rotifers feeding on mixotrophic flagellates. Journal of Plankton Research, 32, 1727–1731.
Jersabek, C.D. (1996) Verbreitung, Ökologie und Taxonomie von Rädertieren (Rotifera) in alpinen Gewässern der Hohen Tauern und der Nördlichen Kalkalpen. Berichte der naturwissenschaftlich-medizinischen Vereinigung Salzburg, 11, 73–145.
Jersabek, C.D. & Bolortsetseg, E. (2010) Mongolian rotifers (Rotifera, Monogononta)–a checklist with annotations on global distribution and autecology. Proceedings of the Academy of Natural Sciences of Philadelphia, 159, 119–168.
Kamjunke, N., Gaedke, U., Tittel, J., Weithoff, G. & Bell, E.M. (2004) Strong vertical differences in the plankton composition of an extremely acidic lake. Archiv für Hydrobiologie, 161, 289–306.
Kamjunke, N., Tittel, J., Krumbeck, H., Beulker, C. & Poerschmann, J. (2005) High heterotrophic bacterial production in acidic, iron-rich mining lakes. Microbial Ecology, 49, 425–433.
Koste, W. & Hollowday, E.D. (1993) A short history of western European rotifer research Hydrobiologia, 255/256, 557–572.
Laufenstein, N. (2010) Lebenszyklus einer acidophilen Cephalodella-Art in Abhängigkeit von verschiedenen Futterkonzentrationen, pH-Werten und Temperaturen. Paris-Lodron-Univ. of Salzburg. Master's thesis, 1–83.
McConathy, J.R. & Stahl, J.B. (1982) Rotifera in the plankton and among filamentous algal clumps in 16 strip-mine lakes. Transactions of the Illionois State Academy of Science, 75, 85–90.
Moser, M. & Weisse, T. (2011) The most acidified Austrian lake in comparison to a neutralized mining lake. Limnologica, 42, in press.
Nixdorf, B., Lessmann, D. & Steinberg, C.E.W. (2003) The importance of chemical buffering for pelagic and benthic colonization of acidic waters. Water, Air, & Soil Pollution, 3, 27–46.
Nogrady, T. & Pourriot, R. (1995) Rotifera 3: The Notommatidae. In: T. Nogrady & H. J. Dumont (Eds.), Guides to the identification of the microinvertebrates of the continental waters of the world. SPB Academic Publishing, Amsterdam, New York.
Segers, H. (2007) Annotated checklist of the rotifers (Phylum Rotifera), with notes on nomenclature, taxonomy and distribution. Zootaxa, 1564, 1–104.
Weithoff, G. (2004) Vertical niche separation of two consumers (Rotatoria) in an extreme habitat. Oecologia, 139, 594–603.
Weithoff, G. (2005) On the ecology of the rotifer Cephalodella hoodi from an extremely acidic lake. Freshwater Biology, 50, 1464–1473.
Weithoff, G. (2007) Dietary restriction in rotifers–the effect of the length of food deprivation on life span and reproduction. Oecologia, 153, 303–308.
Weithoff, G., Moser, M., Kamjunke, N., Gaedke, U. & Weisse, T. (2010) Lake morphometry strongly shapes the plankton community structure in acidic mining lakes. Limnologica, 40, 161–166.
Weithoff, G. & Wacker, A. (2007) The mode of nutrition of mixotrophic flagellates determines the food quality for their consumers. Functional Ecology, 21, 1092–1098.
Wollmann, K., Deneke, R., Nixdorf, B. & Packroff, G. (2000) Dynamics of planktonic food webs in three mining lakes across a pH gradient (pH 2–4). Hydrobiologia, 433, 3–14.
Wulfert, K. (1937) Beiträge zur Kenntnis der Rädertierfauna Deutschlands. Archiv für Hydrobiologie, 31, 592–635.