作者: John E. Reuter , Stanford L. Loeb , Charles R. Goldman
DOI: 10.1016/S0166-1116(08)72174-5
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摘要: Abstract Periphyton growth in oligotrophic Lake Tahoe appears to be regulated by nutrient Input and provides additional evidence of cultural eutrophication. A stalked diatom community, Gomphoneis herculeana , dominates the biomass eulittoral (splash) zone, it is luxuriant this alga which has caused algal biofouling problems pristine lake. 15N-labelled nitrate ammonium uptake experiments showed that community had a greater affinity for these nutrients than did sublittoral periphyton depended on nitrogen fixation meet its cellular demands. The rates at natural substrate levels, measured under no flow (static) conditions were too low account community's N-demand. We suggest water movement (e.g., wave action) an important mechanism acts increase bio-availability therefore allows algae achieve high even though ambient concentrations are low.