The response of a freshwater wetland to long-term 'low level' nutrient loads: nutrients and water budget

被引:0
作者
Moustafa, MZ [1 ]
Fontaine, TD [1 ]
Guardo, M [1 ]
James, RT [1 ]
机构
[1] S Florida Water Management Dist, Everglades Restorat Dept, W Palm Beach, FL 33406 USA
关键词
wetlands; lakes; mass balance; nutrient retention; net sedimentation; nutrient ratio;
D O I
暂无
中图分类号
Q17 [水生生物学];
学科分类号
071004 ;
摘要
Boney Marsh is a small constructed freshwater wetland located along the floodplain of the Kissimmee River in south Florida, USA. River water, with average Tot-P concentrations of 0.052 mg l(-1), Tot-N of 1.70 mg l(-1), and Cl- of 15.95 mg l(-1), was diverted through the marsh to quantify mass retention and fate. Comprehensive mass balance budgets for Tot-P, Tot-N, and Cl- were developed based on input (inflow, precipitation) and output (outflow, evapotranspiration, seepage). Cl-, as well as Na+, budgets indicated that groundwater accounted for approximately 7% of the total water budget. Annual mass loadings to Boney Marsh were 0.5, 15.7, and 147.9 g m(-2) year(-1) for Tot-P, Tot-N, and Cl-, respectively. Mean annual nutrient removal was estimated at 72% for Tot-P and 34% for Tot-N, and P-assimilation capacity remained high and unchanged for the period of record. The subtropical marsh system accumulated Tot-P at a much higher rate than Tot-N, with averaged net sedimentation rates of 20.4 and 8.3 year(-1), respectively. Boney Marsh net sedimentation coefficients were higher than lakes with similar depths. The N:P mass ratio in the wetland water column increased during the period of record, and was primarily due to a high P-sedimentation rate and a declining N-sedimentation rate.
引用
收藏
页码:41 / 53
页数:13
相关论文
共 25 条
  • [1] [Anonymous], [No title captured]
  • [2] Baker LA, 1992, ECOL ENG, V1, P1, DOI [DOI 10.1016/0925-8574(92)90023-U, 10.1016/0925-8574(92)90023-U]
  • [3] Cooper P.F., 1990, CONSTRUCTED WETLANDS
  • [4] DAVIS SM, 1981, S FLORIDA WATER MANA, V811
  • [5] GERSBERG RM, 1984, WATER TECHNOL, V1, P443
  • [6] CYCLING AND RETENTION OF NITROGEN AND PHOSPHORUS IN WETLANDS - A THEORETICAL AND APPLIED PERSPECTIVE
    HOWARDWILLIAMS, C
    [J]. FRESHWATER BIOLOGY, 1985, 15 (04) : 391 - 431
  • [7] James R. Thomas, 1995, Archiv fuer Hydrobiologie Supplementband, V107, P25
  • [8] JANUS LL, 1990, VERH INT VEREIN LIMN, V24, P538
  • [9] JANUS LL, 1989, THESIS MCMASTER U HA
  • [10] KNIGHT RL, 1992, CONSTRUCTED WETLANDS