Primary production in shallow eutrophic Yenicaga Lake (Bolu, Turkey)

Saygi-Basbug Y., Demirkalp F. Y.

FRESENIUS ENVIRONMENTAL BULLETIN, vol.13, no.2, pp.98-104, 2004 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 13 Issue: 2
  • Publication Date: 2004
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.98-104
  • Keywords: primary production, radioactive sodium bicarbonate, Yenicaga Lake, Turkey, PHYTOPLANKTON, RESERVOIR, DYNAMICS
  • Hacettepe University Affiliated: Yes


Temporal and spatial variations of phytoplankton primary production in Yenicaga Lake were evaluated by monthly in situ observation from September 1998 to August 1999. Primary production rates were estimated by determining the C-14 uptake rates of phytoplankton using radioactive sodium bicarbonate ((NaHCO3)-C-14). The highest primary production was measured at the water surface in August 1999 (455.6 mg C m(-3) h(-1)), coinciding with the period of the greatest phytoplankton bloom. The lowest primary production occurred in 2 m depth in April 1999 (0.91 mg C m(-3) h(-1)). The daily primary production ranged between 60 and 6202 mg C m(-2) day(-1).