Management measures and long-term water quality changes in Lake Balaton (Hungary)

István Tátrai, V. Istvánovics, László G. Tóth, István Kóbor

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

A reduction in the external and internal P loadings along with the removal of benthivorous cyprinids resulted in a significant improvement of the water quality in the hypertrophic western part of Lake Balaton by 1996, some ten years following first management measure. Enhanced internal P loading after the reduction in external nutrient load is clearly an important factor explaining the duration of recovery in shallow lakes. Phytoplankton responded quite rapidly to reductions in nutrient loading and fish stock, whereas the effect on both the structure and abundance of the crustacean plankton was less pronounced. The role of top-down control of phytoplankton by crustaceans following nutrient reduction is not clearly understood in shallow lakes. Grazing did not play a significant role in the overall reduction of algal biomass in Lake Balaton. Since high concentration of suspended mineral particles from both sediment resuspension and lime precipitation causes permanent food limitation of daphnids, the top-down effects were negligible in Lake Balaton following fish stock reduction. Fish community structure did not respond to the lower external and internal TP loads cyprinids being dominant in both the pre- and post-management periods.

Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalFundamental and Applied Limnology
Volume172
Issue number1
DOIs
Publication statusPublished - 2008

Fingerprint

Hungary
water quality
lakes
lake
pollution load
cyprinid
Crustacea
phytoplankton
crustacean
nutrient
top-down control
food limitation
fish
plankton
resuspension
community structure
lime
grazing
minerals
sediments

Keywords

  • External nutrient loading
  • Lake Balaton
  • Lake recovery
  • Long-term development
  • Management measures
  • Manual fish removal

ASJC Scopus subject areas

  • Aquatic Science
  • Ecology, Evolution, Behavior and Systematics
  • Ecology

Cite this

Management measures and long-term water quality changes in Lake Balaton (Hungary). / Tátrai, István; Istvánovics, V.; Tóth, László G.; Kóbor, István.

In: Fundamental and Applied Limnology, Vol. 172, No. 1, 2008, p. 1-11.

Research output: Contribution to journalArticle

Tátrai, István ; Istvánovics, V. ; Tóth, László G. ; Kóbor, István. / Management measures and long-term water quality changes in Lake Balaton (Hungary). In: Fundamental and Applied Limnology. 2008 ; Vol. 172, No. 1. pp. 1-11.
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