Data/hora: 06/06/2024 15:24:53

Provedor de dados: | 13
País: | Ukraine
Título: | Climate impact on long-term changeability of the black sea bioluminescence field and plankton community characteristics.
Autores: | Tokarev, Yu.; Mel'nikov, V.; Burmistrova, N.; Belokopytov, V.; Temnykh, A.
Data: | 2008-10-10
Ano: | 2008
Palavras-chave: | Climate changeability; Cold intermediate layer; Bioluminescence; Plankton.
Resumo: | Researches in the bioluminescence field vertical structure, amplitude characteristics and spatial distribution in the Black Sea have been conducted in IBSS, NAS of Ukraine, from  up to the present time. Enough evidencies are available to testify dramatic changes in different Black sea ecosystem components including bioluminescence field parameters, which took place last decades. But still there is no direct answer to the question about the reasons for such transformations, as variability of the Black Sea biophysical (bioluminescence) and biological characteristics at the climatic time scales, i.e. at the scale of decade periods are not sufficiently studied now. The most pronounced changes in vertical structure of the bioluminescence field are observed in the centre of the Black sea western halistase. Wide range of bioluminescence field vertical distribution and plankton community was marked before 1980 following by its sharp narrowing. It is illustrated by bioluminescence field lifting towards the surface layers in the following years. For example, if in 1976 intensive bioluminescence was observed up to depth of 75 m, in 1984 the maximum of the bioluminescent potential corresponded to the layer of 20-35 m, and in 1992 maximum bioluminescence values were registered only in narrow 15-20 m layer. The results of the analysis of changes occurred as well as their connection with the NAO index, which is also linked with the processes of formation and renewal of CIL in the Black Sea and, correspondingly, with the plankton bioluminescents vital activity conditions are presented. The same situation took place in plankton community, namely, constant decrease in biomass in one of the main Black sea bioluminescents – Noctiluca scintilans. The same results were obtained by Russian researchers for the NW shelf of the Black Sea in 1967-1975ss where N. scintilans abundance constituted 968,0 ex/m3, in 1980-1985 – 10,2 ex/m3, and only 2,0 ex/m3 in 1989-1991.
Tipo: | Proceedings Paper
Idioma: | Inglês

Identificador:

Moncheva, S. (Ed.) BS-HOT 2008 Collected Reprints, Published on CD, 2008. p. 1-439.

http://repository.ibss.org.ua/dspace/handle/99011/694

Editor: | Published on CD