Fate of phosphorus in the Lake Okeechobee watershed, Florida, USA: overview and recommendations

Flaig, E. G.; Reddy, K. R.

doi:10.1016/0925-8574(95)00021-6

Cited by 44 publications

(30 citation statements)

References 18 publications

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“…The Caloosahatchee River flows on the southwest Gulf coast of Florida from Lake Okeechobee, the seventh largest lake in the US, and one that now faces a growing eutrophication problem [17,18]. The river is approximately 105 km long and drains a watershed of 356,127 ha [19,20].…”

Section: Site Descriptionmentioning

confidence: 99%

Shifts of Bacterioplankton Metabolic Profiles along the Salinity Gradient in a Subtropical Estuary

et al. 2013

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Understanding the biodegradation potential of river bacterioplankton communities is crucial for watershed management. We investigated the shifts in bacterioplankton metabolic profiles along the salinity gradient of the Caloosahatchee River Estuary, Florida. The carbon source utilization patterns of river bacterioplankton communities were determined by using Biolog EcoPlates. The number of utilized substrates was generally high in the upstream freshwater dominated zone and low in the downstream zone, suggesting a shift in metabolic profiles among bacterioplankton assemblages along the estuarine gradient. The prokaryotic cell numbers also decreased along the estuarine salinity gradient. Seasonal and site-specific differences were found in the numbers of utilized substrates, which were similar in summer and fall (wet season) and winter and spring (dry season). Bacterioplankton assemblages in summer and fall showed more versatile substrate utilization patterns than those of winter and spring communities. Therefore, our data suggest that microbial metabolic patterns in the subtropical estuary are likely influenced by the water discharge patterns created by dry and wet seasons along the salinity gradient.

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Section: Site Descriptionmentioning

confidence: 99%

Shifts of Bacterioplankton Metabolic Profiles along the Salinity Gradient in a Subtropical Estuary

et al. 2013

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“…A variety of restoration techniques, including hydrological management (Day et al, 2005), reduction of P in the external loads (Lane et al, 2001), in lake reduction or immobilisation of P (Flaig and Reddy, 1995;Coveney et al, 2002), and complementary ecological management (Lane et al, 2001;Day et al, 2005), have been employed to reduce both external and internal nutrient load of lake. Since it has now been established that P and, to a lesser extent, N have the greatest impact on algal growth in freshwaters, most restoration techniques are directed towards reducing P in the inflows and in lakes (Ruban et al, 1999;Gulati and van Donk, 2002).…”

Section: Introductionmentioning

confidence: 99%

Estimation of the natural purification rate of a eutrophic lake after pollutant removal

Jiang

Shen

2006

Ecological Engineering

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“…External loading of P from agricultural and cattle areas has been addressed through the implementation of Best Management Practices (Bottcher et al 1999), and interception strategies that involve the restoration of isolated wetlands in the state of Florida (Rice et al 2002). However, internal loading of P through impacted soils within the NSTC still exceeds the desired levels and continues to prevent the rapid improvement of water quality in the basin (Flaig and Reddy 1995;Pant and Reddy 2003).…”

Section: Background and Motivationmentioning

confidence: 97%

Phosphorus Mass Balance and Internal Load in an Impacted Subtropical Isolated Wetland

Bhadha

Jawitz

Min

2010

Water Air Soil Pollut

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Internal loading is a critical component of the phosphorus (P) budget of aquatic systems that can control trophic conditions. While diffusion across the soil-water interface is generally considered the dominant process controlling P load to the water column, advection due to water table fluctuations can also be significant. Our objective was to evaluate the role of diffusive and advective fluxes in relation to the total P (TP) loads entering and exiting an impacted wetland in the Lake Okeechobee drainage basin. The average diffusive flux of TP was 0.32±0.14 mgm −2 day −1 and occurred for 240 days out of 314, while advective flux was 1.31± 4.03 mgm −2 day −1 and occurred for only 57 days. Phosphorus load to the wetland via internal modes was estimated to be 2.3 and 4.0 gday −1 from diffusion and advection respectively, accounting for 18% of the total P input, while overland flow (51%) was the major input pathway to the wetland. Ditch flow and groundwater outflow accounted for 49% (18.0 gday −1 ) and 14% (5.0 g day −1 ) of the total P output, respectively. This study shows the importance of advective flux in addition to diffusive flux and that the former should not be neglected when estimating internal P load of transiently flooded isolated wetlands. The monthly P budget-based retention and release patterns were consistent with previous findings, showing that intermittent flooding and drying cycling significantly reduces the P retention capacity of a wetland.

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Fate of phosphorus in the Lake Okeechobee watershed, Florida, USA: overview and recommendations

Cited by 44 publications

References 18 publications

Shifts of Bacterioplankton Metabolic Profiles along the Salinity Gradient in a Subtropical Estuary

Shifts of Bacterioplankton Metabolic Profiles along the Salinity Gradient in a Subtropical Estuary

Estimation of the natural purification rate of a eutrophic lake after pollutant removal

Phosphorus Mass Balance and Internal Load in an Impacted Subtropical Isolated Wetland

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