The distributions of chlorin components as well as chlorophylls c and β-carotene in postglacial sediments (down to ca 5 m depth), collected from the Gotland Deep in July 1997, have been determined. The major pigments were similar to those identified in recent (0–10 cm) sediment extracts of the Gdansk Deep. High amounts of well preserved chlorins, including intact chlorophyll a, provide evidence for high primary production in the past, anoxic sedimentation and favourable postdepositional conditions. In addition, the results reveal several extremely rapid changes in the Baltic environment over the last 8000 years caused by different physico-chemical conditions and subsequent changes in phytoplankton occurrence, biomass and algal species.
2
Dostęp do pełnego tekstu na zewnętrznej witrynie WWW
Deep sediments (to 660 cm) from the Baltic Sea, collected in 1996-1997, were analysed for content of chlorophyll a and its immediate derivatives (chlorins: phaeophytin, pyrophaeophytin, phaeophorbides and steryl chlorin esters) using the diode-array HPLC method. These compounds were generally well preserved. The concentrations of both particular and total chlorins varied greatly depending on the sediment layer and were surprisingly high in some cases, comparable to concentrations in contemporary Baltic sediments (0-1cm layer).
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.