Examination of reactive phosphate fluxes in an eutrophicated coastal area
Küçük Resim Yok
Tarih
2012
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Reactive phosphate (RP) fluxes over sediment in an eutrophic bay were obtained under different conditions. The results were assessed together with water column, sediment solid, and liquid-phase parameters. The RP fluxes ranged from 0 to 1,300 µgatP × m -2d -1 day depending on the sediment site and other variables. At stations with relatively high net RP fluxes, the clay fraction was >3% and disproportionate with salinity, which explained why the RP effluxes decreased by inhibition of the organic coating on particulate matter with increased SO 4 -2 ions and good competition of RP anions with SO 4 -2. The RP flux in Fe/RP ratios >2 in surface water decreased to approach a minimum asymptotically, which was thus defined with a hyperbolic curve to determine the maximum rate of the RP flux (JRP). The [RPporewater]initial/[RPambient] initial ratios were suggested to govern the net RP flux regionally, so the critical value where the RP flux turns positive could indicate eutrophication with Chl-a values <500 µg/g. So, this study investigated the phosphate fluxes between sediment and water column and determined the factors influencing the RP fluxes in the inner bay of Izmir. © Springer Science+Business Media B.V. 2011.
Açıklama
Anahtar Kelimeler
Eutrophication, Flux, Porewater, Reactive phosphate, Sediment
Kaynak
Environmental Monitoring and Assessment
WoS Q Değeri
Scopus Q Değeri
Q2
Cilt
184
Sayı
6
