Total Coliform and<i>Escherichia Coli</i>Counts in 99 Florida Lakes with Relations to Some Common Limnological Factors

Hoyer, Mark V.; Donze, Jennifer L.; Schulz, Eric J.; Willis, Daniel J.

doi:10.1080/07438140609353891

Cited by 12 publications

(7 citation statements)

References 21 publications

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“…There is a higher possibility of contracting waterborne bacterial diseases with higher bacterial abundance in drinking water facilities [ 52 ]. Therefore, TCB’s regular monitoring is of broader concern due to higher waterborne diseases risks [ 53 ].…”

Section: Resultsmentioning

confidence: 99%

“…There is a higher possibility of contracting waterborne bacterial diseases with higher bacterial abundance in drinking water facilities [52]. Therefore, TCB's regular monitoring is of broader concern due to higher waterborne diseases risks [53]. This alluded to the highly manipulating impact of the intensive rainfall events and how it delivers higher levels of nutrients and solid contents to the reservoir ecosystem (Figure 4).…”

Section: Spatial Fluctuations In Water Qualitymentioning

confidence: 99%

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Long-Term Interannual and Seasonal Links between the Nutrient Regime, Sestonic Chlorophyll and Dominant Bluegreen Algae under the Varying Intensity of Monsoon Precipitation in a Drinking Water Reservoir

Kim

Atique

Mamun

et al. 2021

IJERPH

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Long-term variations in reservoir water chemistry could provide essential data in making sustainable water quality management decisions. Here, we analyzed the spatiotemporal variabilities of nutrients, sestonic chlorophyll-a (CHL-a), nutrient enrichment, dominant algal species, and overall chemical water health of the third-largest drinking water reservoir in South Korea during 2000–2020. Our results distinctly explained the strong influence of monsoon rainfall on spatial and annual water chemistry variations. We observed a consistent increase in the chemical oxygen demand alluding to organic matter pollutants, while a steady declining trend in the sestonic CHL-a. The long-term total phosphorus (TP) level showed a steady reduction from the riverine zone to the lacustrine area. However, a higher total coliform bacteria (TCB) was observed at the water intake tower sites. TP displayed a strong link to algal CHL-a and ambient nitrogen phosphorus ratios, suggesting a robust phosphorus-limitation state. The severe phosphorus-limitation was also corroborated by the findings of trophic state index deviation. The high and low flow dynamics exhibited the strong influence of intensive rainfall carrying many nutrients and sediments and flushing out the sestonic CHL-a. Successive eutrophic conditions prevailed along with dominating blue-green algae species (Microcystis and Anabaena). We observed a strong positive correlation (r = 0.62) between water temperature and CHL-a and between total suspended solids and TP (r = 0.65). The multi-metric water pollution index characterized the overall water quality as ‘good’ at all the study sites. In conclusion, the long-term spatiotemporal variabilities of the ecological functions based on the nutrient-CHL-a empirical models are regulated mainly by the intensive monsoon precipitation. The drinking water could become hazardous under the recurrent eutrophication events and chemical degradations due to uncontrolled and untreated inflow of sewage and wastewater treatment plant effluents. Therefore, we strongly advocate stringent criteria to mitigate phosphorus and organic pollutant influx for sustainable management of Daecheong Reservoir.

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Section: Resultsmentioning

confidence: 99%

Section: Spatial Fluctuations In Water Qualitymentioning

confidence: 99%

Long-Term Interannual and Seasonal Links between the Nutrient Regime, Sestonic Chlorophyll and Dominant Bluegreen Algae under the Varying Intensity of Monsoon Precipitation in a Drinking Water Reservoir

Kim

Atique

Mamun

et al. 2021

IJERPH

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“…Fresh fecal samples were collected from as many waterfowl as possible using sterile swabs and aseptic techniques. Fecal samples role in fecal contamination levels unanswered (18). The goal of this study was to investigate this question and relationship by testing the hypothesis that the bacterial water quality of freshwater lakes in Central Florida will vary across a gradient of waterfowl abundance.…”

Section: Sampling Methodsmentioning

confidence: 99%

Waterfowl Influence on Fecal Indicator Bacteria in Central Florida Freshwater Lakes

Schomaker

Gasper

2018

finefocus

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Bacteria are important natural components of virtually every environment, including water systems. While many are beneficial to the ecosystem in which they are found, some can be indicators of pathogens that can endanger human health. Fecal coliform bacteria such as Escherichia coli are bacterial indicators that can originate from many of the same sources as pathogenic bacteria and serve as a sign that pathogens may be present. These bacterial counts can be influenced by many different well-studied environmental factors, including pH, temperature, and nutrient availability. In addition to these factors, mammalian and waterfowl presence can influence coliform abundance. While this area of research has been examined before, conflicting conclusions have been reached as to whether or not waterfowl abundance positively correlates with coliform bacteria abundance. Levels of E. coli as well as Enterococcus, a genus of non-coliform bacterial organisms that are also found in high concentrations in feces, were measured by membrane filtration of water samples collected from six freshwater lakes around Lakeland, FL and were isolated from fresh fecal samples that were simultaneously collected from waterfowl species present at the lakes. Results suggest a correlation between the abundance of E. coli and the presence of waterfowl.

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“…Thus, fecal microbes from dog, cat, urban wildlife, and waterfowl waste likely enter the lake directly from the park environs during rain events, and fecal materials are carried by runoff into the tributaries from neighborhoods in the watershed, as well. Although waterfowl can be a significant source of fecal microbial contamination to some waterways (Weiskel et al 1996, Hoyer et al 2006, bacteria contributed by the waterfowl population were not calculated in this study because no values for excreted fecal bacteria have been determined for some of the most numerous bird groups observed on Greenfield Lake.…”

Section: Greenfield Lake Water Qualitymentioning

confidence: 99%

Algal blooms, circulators, waterfowl, and eutrophic Greenfield Lake, North Carolina

Mallin

McIver

Wambach

et al. 2016

Lake and Reservoir Management

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Lake rehabilitation measures can sometimes have unintended consequences, including increasing certain eutrophication symptoms. An example involves Greenfield Lake, an urban blackwater impoundment within the City of Wilmington, North Carolina. This popular recreational impoundment has experienced noxious phytoplankton and macrophyte blooms, anoxia and hypoxia, and fish kills for many years. Chlorophyll a and biological oxygen demand are strongly correlated within the lake, indicating that decaying algal blooms are an important source of oxygen demand resulting in low dissolved oxygen. Nutrient addition bioassays demonstrated that the phytoplankton strongly responded to nitrogen (N) inputs. Spatially, ammonium, nitrate, and N/P ratios were higher in the upper lake compared with the lower lake, indicating tributary input of inorganic N, whereas phosphorus (P) was higher in the lower lake. A year-long survey indicated that waterfowl, especially cormorants, contributed somewhat to the lake's total N load but a considerable amount of P, particularly in winter. The lake sediments apparently function as P reservoirs, supplying P to the water column during summer, setting the stage for runoff-induced nitrate pulses and subsequent algal blooms. Lake restoration measures initiated in 2005 included installation of solar-powered circulators, introduction of grass carp, and herbicide treatments. These measures resulted in loss of surface macrophyte and algal mats and reduced dissolved oxygen violations but led to a significant increase in phytoplankton chlorophyll a and a tripling of chlorophyll a standard violations in comparison with pre-restoration years. The increased chlorophyll a violations have led to inclusion of the lake on the North Carolina 303(d) list of impaired waters.

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Total Coliform andEscherichia ColiCounts in 99 Florida Lakes with Relations to Some Common Limnological Factors

Cited by 12 publications

References 21 publications

Long-Term Interannual and Seasonal Links between the Nutrient Regime, Sestonic Chlorophyll and Dominant Bluegreen Algae under the Varying Intensity of Monsoon Precipitation in a Drinking Water Reservoir

Long-Term Interannual and Seasonal Links between the Nutrient Regime, Sestonic Chlorophyll and Dominant Bluegreen Algae under the Varying Intensity of Monsoon Precipitation in a Drinking Water Reservoir

Waterfowl Influence on Fecal Indicator Bacteria in Central Florida Freshwater Lakes

Algal blooms, circulators, waterfowl, and eutrophic Greenfield Lake, North Carolina

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