Iron speciation and biogeochemistry in different nearshore waters

Ozturk M., Bizsel N.

MARINE CHEMISTRY, cilt.83, sa.3-4, ss.145-156, 2003 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 83 Sayı: 3-4
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1016/s0304-4203(03)00108-7
  • Dergi Adı: MARINE CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.145-156
  • Anahtar Kelimeler: iron speciation, iron bioavailability, iron limitation, phytoplankton, coastal waters
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Different environmental conditions in various nearshore waters dynamically determine the speciation of iron, its solubility, removal and hence bioavailability to phytoplankton. The iron speciation, the impact of phytoplankton blooms and the effects of organic matter on iron speciation and transformation were studied in four different coastal systems: the Trondheim Fjord, Norway, which is a coastal system that is open to a vast riverine impact; Hopevagen, Norway, a pristine coastal basin, which has negligible river and anthropogenic impact; Izmir Bay, Turkey, a Mediterranean embayment with heavily polluted eutrophic inner-middle section, and the oligotrophic outer section. In this paper, we compare iron speciation in these different coastal systems. While colloidal iron (ColFe) was the predominant species especially in the Trondheim Fjord and to some degree also in Hopavagen, Chelex labile iron (ClxLFe) and hydrophobic organic-iron complex (HpOFe) were predominate species in both the inner-middle and the outer section of Izmir Bay. The impact of phytoplankton blooms on the ClxLFe was significant especially in the Trondheim Fjord, in the inner-middle section of Izmir Bay and in Hopevagen. (C) 2003 Elsevier B.V. All rights reserved.