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首页> 外文期刊>International association of theoretical and applied limnoloy >Four consecutive dry years in Lake Balaton (Hungary): consequences for phytoplankton biomass and composition
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Four consecutive dry years in Lake Balaton (Hungary): consequences for phytoplankton biomass and composition

机译：Four consecutive dry years in Lake Balaton (Hungary): consequences for phytoplankton biomass and composition

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摘要

According to results of statistical and modeling studies of the climate and water budget of Lake Balaton (NOVAKY in SOMLYODI 2003, KONCSOS et al. in SOM-LYODI 2003), the drought experienced between 2000 and 2003 was not particularly extreme and so cannot, with confidence, be attributed to definite change in the climate. Moreover, these studies confirm that the water budget of the lake is still characteristically positive, although climate change may increase the frequency of low water periods. The 4-year dry period in the lake did not result in deterioration of ecological status of the lake; further, many indicator groups included in the Water Framework Directives provided positive responses to the low-water stage. This result corresponds to the original ecological status of the lake. Because Lake Balaton does not have a natural outlet, its surface has changed considerably in the past. The equilibrial water surface (when evapo-transpiration is the only loss) is estimated as 1300 km~2, more than twice that of present. Natural shoreline vegetation not only tolerates but requires an oscillating water level (for example because it enables clone-selection).

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