The transfer of zinc in two linked trophic levels in fresh water and its effect on the reproduction of Daphnia magna


Canli M.

JOURNAL OF FRESHWATER ECOLOGY, cilt.20, ss.269-276, 2005 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 20 Konu: 2
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1080/02705060.2005.9664966
  • Dergi Adı: JOURNAL OF FRESHWATER ECOLOGY
  • Sayfa Sayısı: ss.269-276

Özet

The green algae, Pseudokirchneriella subcapitata, was cultured in five different Zn concentrations (0, 50, 100, 500, and 1000 nM) for 4 d. Accumulation and toxicity of Zn in the algae increased with increasing Zn concentration, and highest and lowest algal growth rates occurred in medium containing 50 nM and 1000 nM Zn, respectively. There was a negative relationship (r = -0.89, P < 0.05) between Zn accumulation and algal growth. Diets prepared from these cultures were fed to Daphnia magna up to 7 d to investigate the Zn transfer between the two trophic levels. Feeding rate, growth, protein levels, and offspring production of the cladocerans were investigated.