Acta Adriatica, Vol. 49 No. 2, 2008.
Izvorni znanstveni članak
Vertical distribution of phosphorus species and iron in sediment at open sea stations in the middle Adriatic region
Slavica MATIJEVIĆ
; Institut za oceanografiju i ribarstvo,
Zorana KLJAKOVIĆ-GAŠPIĆ
; Institut za medicinska istraživanja i medicinu rada,
Danijela BOGNER
; Institut za oceanografiju i ribarstvo,
Ante GUGIĆ
; Sveučilišni studijski centar za studije mora, Sveučilište u Splitu, Hrvatska
Igor MARTINOVIĆ
; Sveučilišni studijski centar za studije mora, Sveučilište u Splitu, Hrvatska
Sažetak
Sedimentary phosphorus species concentrations were examined in cores (0-10 cm) from 5 locations in the open middle Adriatic in June 2002. Measurements included organic phosphorus (OP) and inorganic P species: P in biogenic apatite (P-FD), P adsorbed onto iron-oxy/hydroxides (P-Fe), P in authigenic apatite (P-AUT) and P in detrital apatite (P-DET). Total iron (Fe-TOT) and iron-oxyhydroxides (Fe(III)OOH) concentrations were also determined as well as granulometric composition, organic matter (OM), organic carbon (C-ORG) and carbonate content (CA). Sediment pore water measurements included redox-potential (EH) and orthophosphate concentration. All relevant data were subjected to correlation, Cluster and Principal Component Analysis (PCA). Cluster analysis indicated that granulometric composition and carbonate content are the leading factors of distinction between the stations. PCA revealed that the fine fraction of sediments has a key role in the vertical distribution of Fe-TOT and P-ORG. Linkage among P-AUT, P-DET and C-ORG results from river input influence, while association between OM, P-Fe, EH and OP arises from complex internal processes in the sedimentary P cycle.
Ključne riječi
phosphorus; sediment; iron; Adriatic Sea
Hrčak ID:
31826
URI
Datum izdavanja:
1.12.2008.
Posjeta: 1.801 *