Rola krzemu w procesie eutrofizacji wód na przykładzie zbiorników Solina i Myczkowce

• Autorzy: Koszelnik P.

Warianty tytułu

EN

The Role of Silicon in the Process of Eutrophication of the Waters – Solina and Myczkowce Reservoirs Case Study

• Języki publikacji: PL

Abstrakty

EN

This paper reports on studies conducted during 2005–2006 years in the ecosystem of the Solina-Myczkowce mountain complex of mesotrophic reservoirs on the San River, SE Poland. The goal of the present study has been to analyse the functioning of the reservoirs as a dissolved silicon sink especially whether silicon assumes a limiting role where the biological productivity of reservoirs waters is concerned. Silicon is one of the biosphere’s most abundant elements, and one that – in the form of dissolved silica – serves as a very important nutrient playing a major role in the functioning of marine, coastal and inland waters. Investigations indicate that reservoirs are major sinks for the dissolved silica in a river system and that unfavorable changes in water chemistry downstream may ensue where (as is usually the case), the water discharged from a reservoir is poorer in Si than that supplied to it. The noted Si depletion in both the analysed reservoirs influenced growth of non-siliceous algae expressed in terms of chl a. Siliceous algal growth is usually observed there during spring. I suppose that the first chl a maximum in the case of the Solina Reservoir, and the only maximum in the Myczkowce Reservoir, result from the growth of both siliceous and green algae. The next increase in chl a – observed only in the Solina Reservoir – may result from the presence of the cyanobacteria often observed in warm lakes at the end of summer. Their absence from Myczkowce reflects the low temperature of that reservoir’s water, this being supplied from the hypolimnion of the upper one. These observations are confirmed in relationships between mean measured concentrations of Si and mean concentrations of chl a in the euphotic zone of the two reservoirs. Observed summer depletion of the silicate accelerates the growth of phytoplankton exponentially, especially in the case of the upper reservoir.

Słowa kluczowe

PL

proces eutrofizacji wód; rola krzemu

EN

nutrient limitation; dissolved silicate; retention; nitrogen; phosphorus; lake; transport; sediments; complex; river

• Wydawca: Politechnika Koszalińska
• Czasopismo: Rocznik Ochrona Środowiska
• Rocznik: 2013
• Tom: Tom 15, cz. 3
• Strony: 2218--2231
• Opis fizyczny: Bibliogr. 23 poz., tab., rys.

Twórcy

autor

Koszelnik P.

• Politechnika Rzeszowska

Bibliografia

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