Skip to main content
padlock icon - secure page this page is secure

Fishpond sediments - the source of palaeoecological information and algal "seed banks"

Buy Article:

$39.00 + tax (Refund Policy)

Sediment samples were taken for the first reconstruction of the eutrophication process in a man-managed fishpond using diatom frustules. Samples were also used for culture experiments in order to make good the lack of information about surviving and/or overwintering of most freshwater cyanobacteria and algae and to assess the significance of this ability in population recurrence. The extraction of a sediment core took place in January 2003, i.e. 43 years after the last restoration by sediment removal. A slow increase of eutrophication is shown by an increasing nitrogen and phosphorus content in the sediment along with changes in the diatom assemblage, especially marked in the shift from attached (Amphora copulata) to planktonic species (Stephanodiscus) tolerating high trophic level. Diatoms (Cyclotella) were observed among the first algae growing in culture experiments. The most frequent green algae encountered were species of Scenedesmus. Flagellates (Chlamydomonas) were observed in the upper layers of sediment. Cyanobacteria were represented by Nostoc and Anabaena.

All germinated diatom taxa were also found in the palaeoecological part of the study, but they were not necessarily the most abundant species in the core. Thus the ability to form viable resting stages and/or to grow quickly can have a similar significance for the return of the population. The viable resting stages in the bottom sediment represent a "seed bank" for the potential return of various algal species, depending on the character of sediment disturbances. Superficial disturbances (wind, water circulation, macrozoobenthos) offer a chance for growth from resting stages of more recent populations, but profound disturbances (fish, man - restoration by sediment removal) can cause the rejuvenation of species from deep sediment layers.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Publication date: February 1, 2008

More about this publication?
  • Nova Hedwigia is an international journal publishing original, peer-reviewed papers on current issues of taxonomy, morphology, ultrastructure and ecology of all groups of cryptogamic plants, including cyanophytes/cyanobacteria and fungi. The half-tone plates in Nova Hedwigia are known for their high quality, which makes them especially suitable for the reproduction of photomicrographs and scanning and transmission electron micrographs.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more