Comparison of phosphorus release from littoral and profundal sediments in a shallow, eutrophic lake

被引:66
作者
Andersen, FO [1 ]
Ring, P [1 ]
机构
[1] Odense Univ, Inst Biol, DK-5230 Odense M, Denmark
关键词
internal loading; iron; oxic; anoxic; temperature; macrophyte;
D O I
10.1023/A:1017027818233
中图分类号
Q17 [水生生物学];
学科分类号
071004 ;
摘要
The release of phosphorus (P) and iron (Fe) was studied in undisturbed sediment cores from littoral and profundal sediments of shallow, eutrophic Lake Arreskov (Denmark). The cores were incubated for 100 days in darkness under oxic and anoxic conditions at 12 and 19 degrees C and cumulative fluxes of P and Fe were determined. The littoral sediment showed higher P release than the profundal sediment under both oxic and anoxic conditions, however, the difference was only significant during the first 35 days under anoxic conditions. The release rates of P and Fe were significantly higher under anoxic than under oxic conditions. Sequential extractions of P-fractions in sediment from different depths (0-15 cm) were conducted before and after the experiment. Under anoxic conditions, iron-bound P was the most important fraction for the loss of P from both sediments. The decrease in the iron-bound P pool contributed 54% and 86 % of the loss of total particulate P (TPsed) from littoral and profundal sediments under anoxic conditions, respectively, whereas it under oxic conditions only constituted 25% of the TPsed lost from the littoral sediment. Organic P accounted for 31 and 55% of the TPsed lost from the littoral sediment under anoxic and oxic conditions, respectively, while organic P was unimportant (< 1%) for the loss of TPsed from the profundal sediment under anoxic conditions. This indicates that littoral sediments may contribute significantly to the internal P loading, especially if low O-2 concentrations occur at the sediment-water interface.
引用
收藏
页码:175 / 183
页数:9
相关论文
共 28 条
[1]   NUTRIENT CYCLING IN SHALLOW, OLIGOTROPHIC LAKE KVIE, DENMARK .2. EFFECTS OF ISOETIDS ON THE EXCHANGE OF PHOSPHORUS BETWEEN SEDIMENT AND WATER [J].
ANDERSEN, FO ;
OLSEN, KR .
HYDROBIOLOGIA, 1994, 275 :267-276
[2]  
ANDERSEN FO, 1992, HYDROBIOLOGIA, V228, P71
[3]  
[Anonymous], 1990, MEM I ITAL IDROBIOL
[4]   LONG-TERM AND SHORT-TERM DYNAMICS OF SUBMERGED MACROPHYTES IN 2 SHALLOW EUTROPHIC LAKES [J].
BLINDOW, I .
FRESHWATER BIOLOGY, 1992, 28 (01) :15-27
[5]   EXCHANGE OF PHOSPHORUS ACROSS THE SEDIMENT - WATER INTERFACE [J].
BOSTROM, B ;
ANDERSEN, JM ;
FLEISCHER, S ;
JANSSON, M .
HYDROBIOLOGIA, 1988, 170 :229-244
[6]   POST-DEPOSITIONAL MOBILITY OF PHOSPHORUS IN LAKE-SEDIMENTS [J].
CARIGNAN, R ;
FLETT, RJ .
LIMNOLOGY AND OCEANOGRAPHY, 1981, 26 (02) :361-366
[7]   Comparison of iron, manganese, and phosphorus retention in freshwater littoral sediment with growth of Littorella uniflora and benthic microalgae [J].
Christensen, KK ;
Andersen, FO ;
Jensen, HS .
BIOGEOCHEMISTRY, 1997, 38 (02) :149-171
[8]   Influence of Littorella uniflora on phosphorus retention in sediment supplied with artificial porewater [J].
Christensen, KK ;
Andersen, FO .
AQUATIC BOTANY, 1996, 55 (03) :183-197
[9]   CHEMICAL, PHYSICAL AND BIOLOGICAL CHANGES ASSOCIATED WITH CHARA SUCCESSION IN FARM PONDS [J].
CRAWFORD, SA .
HYDROBIOLOGIA, 1977, 55 (03) :209-217
[10]  
FRODGE J D, 1991, Lake and Reservoir Management, V7, P61