Eutrophication and annual primary production of phytoplankton in the deep-water part of the Black Sea |
| |
| Authors: | O A Yunev |
| |
| Institution: | 1.Institute of Biology of the Southern Seas,National Academy of Sciences of Ukraine,Sevastopol,Ukraine |
| |
| Abstract: | Using the data of daily primary production, as well as intraannual and long-term changes in the concentration of chlorophyll
“a” and hydrochemical characteristics, the annual primary production of phytoplankton in the deep-water part of the Black
Sea is estimated for the three key periods in the contemporary evolution of the sea: preeutrophication, very intense eutrophication,
and the present-day period characterized by deeutrophication. It is shown that eutrophication in the second part of the 20th
Century led to an increase in the production level not only in the shelf of the Black Sea, but also its deep-water areas.
By the end of the 1980s and the early 1990s, the value of the annual primary production in this part of the sea increased
from 63 ± 18 g C m−2 yr−1 (in the 1960s) up to 135 ± 30 g C m−2 yr−1. On the contrary, after 1993, mainly because of reduced runoff of biogenic substances into the Black Sea from land based
sources, there was a decrease in the annual production of phytoplankton in the deep-water areas of the sea, which is currently
about 105 g C m−2 yr−1. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
