Phytoplankton and Trophic Gradients

1. Seasonal and Long-Term Dynamics

   1. Structural changes during eutrophication of Lake Balaton, Hungary, as revealed by the Zipf-Mandelbrot model

      • Szilveszter Juhos, Lajos Vörös

      Pages 237-242

   2. Trends and relations among basic phytoplankton characteristics in the course of the long-term oligotrophication of Lake Maggiore (Italy)

      • D. Ruggiu, G. Morabito, P. Panzani, A. Pugnetti

      Pages 243-257

   3. Development of the phytoplankton of the shallow Srebarna Lake (north-eastern Bulgaria) across a trophic gradient

      • Maya Petrova Stoyneva

      Pages 259-267

2. Taxonomy and Ecology of Photosynthetic Flagellates

   1. Life-cycle studies and culture experiments for identification of doubtful volvocacean organisms — observations on Pandorina and Eudorina

      • David G. Angeler

      Pages 269-275

   2. Morphological changes of Euglenophyta in response to organic enrichment

      • Visitación Conforti

      Pages 277-285

   3. Specific composition and ecology of chrysophyte flagellates in Lake Sanabria (NW Spain)

      • Caridad De Hoyos, Juan José Aldasoro, Manuel Toro, Francisco A. Comín

      Pages 287-295

   4. Taxonomic remarks on planktonic phytoflagellates in a hypertrophic tropical lagoon (Brazil)

      • Patrícia Domingos, Mariângela Menezes

      Pages 297-313

   5. Chrysophytes and chlamydomonads: pioneer colonists in extremely acidic mining lakes (pH <3) in Lusatia (Germany)

      • Brigitte Nixdorf, Ute Mischke, Dieter Leßmann

      Pages 315-327

   6. Ecology of mixotrophic flagellates with special reference to Chrysophyceae in Danish lakes

      • Kirsten Olrik

      Pages 329-338

   7. Silica-scaled chrysophytes from permanent and temporary waters of Hortobágy, eastern Hungary

      • Leontin Stefan Péterfi, Laura Momeu, Judit Padisák, Viktoria Varga

      Pages 339-351

   8. On the occurrence of Phacotus lenticularis (Chlorophyta) in lakes of different trophic state

      • Ines Schlegel, Rainer Koschel, Lothar Krienitz

      Pages 353-361

   9. Euglenophyta found exclusively in South America

      • Guillermo Tell

      Pages 363-372

These proceedings deal with the relationship between species composition of freshwater phytoplankton and the trophic gradient. Particular regard is paid to the composite question, what lives where and why? Overview papers report the state of the art and suggest that the trophic spectrum appears to be a probabilistic outcome of several dimensions of variability that impinge upon phytoplankton species selection. Studies on community structure span all latitudes from those of Antarctica to equatorial Brazil, and also include reports on light and nutrient gradients, pH and fish-stock effects on species composition. Seasonal and longterm phytoplankton dynamics in lakes of varying trophic status are also considered. Finally, studies on the taxonomy and autoecology of some groups (e.g. Volvocales, Chrysophytes and Euglenophytes) living at the extremes of the trophic spectrum contribute to our knowledge of this usually neglected phytoplankton.
This is the first time that a book covers such a topic, and it will prove an excellent source of information to anyone working on phytoplankton ecology and ecological indicators. Limnologists in general, algologists and the technical staff at water authorities will all benefit by reading this book.

• Chrysophyceae
• Eudorina
• Eutrophication
• Pandorina
• boreal lakes
• cyanobacteria
• dinoflagellates
• eutrophic shallow lakes
• hypertrophic tropical lagoon
• oligotrophic mountain lake
• phytoflagellates
• phytoplankton taxa
• potamoplankton
• tropical lakes
• volvocacean organisms

• Centro de Ciencias Medioambientales (CSIC), Madrid, Spain

  Miguel Alvarez-Cobelas

• NERC Institute of Freshwater Ecology, The Ferry House, Ambleside, Cumbria, UK

  Colin S. Reynolds

• Dept. Biología Vegetal, Fac. Ciencias, Univ. Granada, Granada, Spain

  Pedro Sánchez-Castillo

• Institut for Spøreplanter, Univ. Køvenhavn, Køvenhavn, Denmark

  Jørgen Kristiansen

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