Cyanobacteria-mediated internal eutrophication in shallow Lake Balaton after load reduction

V. Istvánovics, L. Somlyódy, Adrienne Clement

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Nutrient loads to large, shallow Lake Balaton have been reduced by 45-50% since mid-1980s. While a delayed, but still surprisingly fast recovery was observed in the hypertrophic western areas of the lake, eutrophication followed sewage diversion from the mesotrophic northern basins. We assessed factors that could lead to this unusual response. The prime reason of the observed biomass increase might be a trend of increasing mean water temperature during late summers and the concurrent invasion of the subtropical cyanobacterium, Cylindrospermopsis raciborskii with superior light and nutrient utilisation capabilities. In the mesotrophic areas, the prerequisite of the unforeseen success of C. raciborskii was the exceptionally high potential of this species to generate internal P load. Specific morphometric features of the lake rather than nutrient loads might substantiate the increasing dominance of the cyanobacterium in these areas. Our results stress the need to consider individual characteristics of aquatic ecosystems during eutrophication management.

Original languageEnglish
Pages (from-to)3314-3322
Number of pages9
JournalWater Research
Volume36
Issue number13
DOIs
Publication statusPublished - Jul 2002

Fingerprint

Eutrophication
Nutrients
Lakes
eutrophication
cyanobacterium
nutrient
lake
River diversion
Aquatic ecosystems
Sewage
Catchments
aquatic ecosystem
Biomass
water temperature
sewage
Recovery
biomass
summer
basin
Cyanobacteria

Keywords

  • Cyanobacteria
  • Dispersion
  • Internal P load
  • Sewage diversion
  • Water residence time
  • Water temperature

ASJC Scopus subject areas

  • Earth-Surface Processes

Cite this

Cyanobacteria-mediated internal eutrophication in shallow Lake Balaton after load reduction. / Istvánovics, V.; Somlyódy, L.; Clement, Adrienne.

In: Water Research, Vol. 36, No. 13, 07.2002, p. 3314-3322.

Research output: Contribution to journalArticle

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