Seasonal fluxes of phosphate and ammonium across the sediment-water interface in a shallow small estuary (Palmones River, southern Spain)

被引:68
作者
Clavero, V
Izquierdo, JJ
Fernández, JA
Niell, FX
机构
[1] Univ Malaga, Fac Sci, Dept Ecol, E-29071 Malaga, Spain
[2] Univ Malaga, Fac Sci, Dept Plant Biol, E-29071 Malaga, Spain
关键词
phosphate and ammonium fluxes; sediment; oxygen; consumption; organic matter; Palmones estuary;
D O I
10.3354/meps198051
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Seasonal variations in oxygen, phosphate and ammonium fluxes between the sediment and overlying water were measured in a small shallow estuary (Palmones River Estuary, southern Spain) from July 1996 to July 1997. Fluxes at the sediment-water interface were measured in situ and compared with those obtained from the pore water gradients. Oxygen consumption rates ranged from 62.5 to 87.4 mmol m(-2) d(-1), and were highly correlated with phosphate (226 to 1597 mu mol m(-2) d(-1)) and ammonium (3189 to 9561 pmol m(-2) d(-1)) fluxes. The diffusive fluxes of phosphate and ammonium, computed from the pore water gradient, were lower than those measured in situ (from 7 to 24 times for phosphate and from 21 to 55 times for ammonium). Nutrient fluxes are well correlated with temperature and with the C:N ratio of organic matter within the upper 2 cm of the sediment.
引用
收藏
页码:51 / 60
页数:10
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