Studying the response of Lake Ladoga ecosystem to a decrease in phosphorus load |
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| Authors: | L A Rukhovets N A Petrova V V Menshutkin G P Astrakhantsev T R Minina V N Poloskov T N Petrova O M Susareva |
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| Institution: | 1.St. Petersburg Institute for Economics and Mathematics,Russian Academy of Sciences,St. Petersburg,Russia;2.Institute of Limnology,Russian Academy of Sciences,St. Petersburg,Russia |
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| Abstract: | A study of the transformation of Lake Ladoga ecosystem in 1996–2005 shows that a decrease in the phosphorus load after 1995
has not cause a decrease in lake ecosystem productivity. Mathematical modeling provided an explanation of the observed phenomenon,
thus justifying limnologists’ hypothesis that phosphorus turnover within a water body accelerates with increasing abundance
of bacterioplankton and aquatic fungi. Computational experiments have shown that the additional amount of phosphorus that
is required for maintaining phytoplankton productivity is additionally released by destructors (bacterioplankton and aquatic
fungi) from detritus and organic matter dissolved in water. |
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