| Author/Editor | Germ, Mateja | |
| Title | UV-B radiation screen and respiratory potential in phytoplankton in mountain lakes | |
| Translated title | Zaščita pred UV-B sevanjem in dihalni potencial fitoplanktona iz visokogorskih jezer | |
| Type | članek | |
| Source | Acta Biol Slov | |
| Vol. and No. | Letnik 47, št. 1-2 | |
| Publication year | 2004 | |
| Volume | str. 53-60 | |
| Language | eng | |
| Abstract | UV B radiation screen and the respiratory potential (terminal electron transport system - ETS activity) were investigated in phytoplankton from five mountain lakes located on an elevation gradient from 1383 m to 2150 m a.s.l.. The amount of UV absorbing compounds in phytoplankton was generally higher on the lakes from higher elevation. The increased ETS activity of phytoplankton in higher lakes was suggested to reflect the energetic cost of generating the internal mechanisms for photoprotection. Key words: mountain lakes, UV B radiation, chlorophyll a, UV absorbing compounds, ETS activity, nutrient status Abbreviations: DOC - dissolved organic matter, ETS - electron transport system, LK - Lake Krn, LKIn. - Lake Kriško Inferior, LKSup. - Lake Kriško Superior, LL - Lake Ledvica, LP - Lake Planina, UV - ultraviolet, UV AC - UV absorbing compounds. | |
| Summary | Ugotavljali smo sposobnost za izgrajevanje UV zaščitnih snovi ter dihalni potencial (aktivnost terminalnega elektronskega transportnega sistema ETS) fitoplanktona na petih visokogorskih jezerih, ki ležijo na različnih nadmorskih višinah, od 1383 do 2150 m. Vsebnost UV zaščitnih snovi je bila večja v fitoplanktonu iz višje ležečih jezer. Večja aktivnost ETS fitoplanktona iz višje ležečih jezer odraža potrebo po energiji, ki jo organizmi rabijo za mehanizme, s pomočjo katerih se zaščitijo pred sevanjem. Ključne besede: visokogorska jezera, UV B sevanje, klorofil a, UV absorbirajoče snovi, aktivnost ETS, obremenjenost s hranili Okrajšave: DOC - raztopljena organska snov, ETS - elektronski transportni sistem, LK - Krnsko jezero, LKIn. - Spodnje Kriško jezero, LKSup. - Zgornje Kriško jezero, LL - Jezero v Ledvicah, LP - Jezero na Planini pri Jezeru, UV ultravijolično, UV AC - UV absorbirajoče snovi. | |
| Descriptors | FRESH WATER PHYTOPLANKTON ULTRAVIOLET RAYS ELECTRON TRANSPORT CHLOROPHYLL |