Search academic texts

Information × Registration Number 0308U003563, 0105U002244 , R & D reports Title Investigation of energy flows coupling to carbon cycle in hypersaline lake/lagoon ecosystems and new biotechnology development popup.stage_title Дослідження потоків енергії у купі з вуглецевим циклом в екосистемах надмірно солоних озер/лагун і розвиток нової біотехнології Head Efimov Vladimir Vasilievich, Registration Date 12-05-2008 Organization Marine Hydrophysical Institute NAS of Ukraine popup.description2 The microplankton ATP concentrations in the Chersonese Lake changed from 145 to 1817 ng/l (the average 778 ng/l) for two years of observation. The chlorophyll-a values varied from 1.67 to 25.6 mg/m3 (the average 6,8 mg/m3). The heterotrophic-photoautotrophic ratios in the community (HP-index) made 20, which characterizes the ecosystem as trophically intermediate (H/P = 10-20). At the same time, the inter-annual ratios of the trophic groups differed: 2004 was characterized by the heterotrophic index (HP<20), while the next year proved the predominance of the photoautotrophic ratios (HP<10) in the community. This peculiarity of the trophic predominance correlated with the water level fall in the lake in 2004 and its rise in 2005. The average environmental salinity made 49‰. The salinity fluctuations within 38‰ - 71‰ did not noticeably affected the HP index as well as the variations of the other abiotic parameters. The lake water is well aerated; hypoxia and anorexia are rare phenomena. Annual cycle is typical for the climatic processes; at its background there have been traced the variations on seasonal and synoptical scales Product Description popup.authors popup.nrat_date 2020-04-02 Close