1. Vanadium and nickel in dustfall as indicators of power plant pollution

   • E. Ganor
   • S. Altshuller
   • J. Gabbay

   OriginalPaper Pages: 241 - 252

2. Effect of sublethal detergent concentration upon gill permeability of Ctenopharyngodon idella (pisces; cyprinidae)

   • C. Rosas
   • S. Espina
   • I. Rosas

   OriginalPaper Pages: 253 - 258

3. A method for chemical fractionation of chloride from complex effluents

   • Laura A. Hansen

   OriginalPaper Pages: 259 - 265

4. Selected ecosystem relationships in the mercury contaminated Wabigoon-English river system, Canada, and their underlying causes

   • J. W. Parks

   OriginalPaper Pages: 267 - 279

5. Protozoa of a rotating biological contactor treatment plant in Mexico

   • Fermin Rivera
   • Francisco Castro
   • Miryoussef Norouzian

   OriginalPaper Pages: 281 - 301

6. Effects of combinations of heavy metal pollutants on Cuscuta reflexa

   • Sasadhar Jana
   • Aloke Bhattacharjee

   OriginalPaper Pages: 303 - 310

7. Possible mechanisms of aluminum toxicity in a dilute, acidic environment to fingerlings and older life stages of salmonids

   • Christine M. Neville
   • Peter G. C. Campbell

   OriginalPaper Pages: 311 - 327

8. Effects of simulated acid precipitation on cadmium- and zinc-amended soil and soil-pine systems

   • Claire L. Carlson
   • H. L. Ragsdale

   OriginalPaper Pages: 329 - 339

9. Natural and anthropogenic acidity sources for Finnish Lakes

   • Pirkko Kortelainen
   • Jaakko Mannio

   OriginalPaper Pages: 341 - 352

10. Phosphorus removal from swine manure supernatant: Precipitant efficiency

    • P. Couture
    • D. Cluis
    • C. Bastien

    OriginalPaper Pages: 353 - 364

11. Accumulation of fluoride by lichens in the vicinity of Etna volcano

    • F. B. M. Davies
    • G. Notcutt

    OriginalPaper Pages: 365 - 371

12. As(III) removal from aqueous solution by adsorption

    • D. B. Singh
    • G. Prasad
    • V. N. Singh

    OriginalPaper Pages: 373 - 386

13. Effect of rapid oligotrophication by an aquatic treatment pilot plant on the microbial community of a mesotrophic Bog

    • Humitake Seki
    • Mamiko Yonemori
    • Tsuyoshi Ito

    OriginalPaper Pages: 387 - 396

14. Effect of rapid oligotrophication by an aquatic treatment pilot plant on the microbial community of a mesotrophic Bog

    • Tetsuhiro Suzuki
    • Humitake Seki

    OriginalPaper Pages: 397 - 406

15. Effect of rapid oligotrophication by an aquatic treatment pilot plant on the microbial community of a mesotrophic Bog

    • Hitoshi Shinzawa
    • Akira Otsuki
    • Humitake Seki

    OriginalPaper Pages: 407 - 419

16. Effect of rapid oligotrophication by an aquatic treatment pilot plant on the microbial community of a mesotrophic Bog

    • Takeshi Naganuma
    • Humitake Seki

    OriginalPaper Pages: 421 - 432

17. Effect of rapid oligotrophication by an aquatic treatment pilot plant on the microbial community of a mesotrophic Bog

    • Wataru Aida
    • Tetsuro Muraoka
    • Humitake Seki

    OriginalPaper Pages: 433 - 438

18. Book reviews

    • Michel Benarie

    BookReview Pages: 439 - 443

19. Announcements

    Announcement Pages: 445 - 446

20. Errata

    Erratum Pages: 447 - 447