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Grimshaw, Herbert J.; Dolske, Donald A.

doi:10.1023/a:1015505624739

Cited by 30 publications

(3 citation statements)

References 35 publications

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“…The primary sources of the nutrient loading that lead to the freshwater algal blooms has been attributed to a combination of discharge from Lake Okeechobee and basin runoff, which includes agricultural and urban origins [26]. Atmospheric fallout of nutrients was measured in the past to assess potential impacts on the nutrient budget of Lake Okeechobee [27] and the Everglades [28,29]. Because of the abundance of nutrient flux into estuaries and nearshore areas of southwest Florida, any additional inputs of nutrients may be critical in terms of prolonging the impacts of both freshwater and marine harmful algal blooms.…”

Section: Introductionmentioning

confidence: 99%

Dry and Wet Atmospheric Deposition Composition in Southwest Florida: Environmental and Health Implications

et al. 2023

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Southwest Florida is one of the most rapidly growing regions of the United States and has been impacted over the past decade with water-quality issues and some associated health problems. The ionic ratios of the dust measured in southwest Florida vary significantly from those on the Florida east coast and in the Caribbean. The metals concentrations reported herein are enriched in potassium and calcium from local sources. Atmospheric deposition of metals and nutrients appears to have potential impacts on both indirect health problems and environmental issues of concern, particularly harmful algal blooms. However, no significant past research has been performed on measurement of the concentration of either metals including the micronutrient iron or nutrient concentrations occurring in atmospheric dry and wet fallout in southwest Florida. Measurements of the composition of key metals and nutrients were made over a one-year period. Concentrations of total phosphorus in the dust ranged from 0–80.5 mg/kg with an average of 4 mg/kg and in rainfall from 1–15.8 чg/L with an average of 4 mg/kg. Nitrate ranged from 0–746 чg/L with an average of 114.4 чg/L in rainfall in a soluble form, and from 1.3 to 718 mg/kg with an average of 209.9 mg/kg in an insoluble form. Ammonia was measured to range from 1.4 to 658 mg/kg with an average of 101.4 mg/kg in rainfall. Iron was found in the dust at concentrations ranging from 0–81 mg/kg with an average of 3.8 mg/kg and in rainfall from 0–125.7 mg/kg with an average of 3.0 mg/kg. While the measured nutrient and iron concentrations are not likely to initiate a harmful algal bloom, they are likely to sustain an existing bloom. Global climate change may exacerbate the atmospheric aerosol issue by increased wind speeds over Africa associated with longer term drought conditions caused by atmospheric temperature increases.

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Section: Introductionmentioning

confidence: 99%

Dry and Wet Atmospheric Deposition Composition in Southwest Florida: Environmental and Health Implications

et al. 2023

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“…The rapid growth of N inputs from anthropogenic sources has become an important global environmental issue in many areas of the world (Galloway et al, 2008;Williams et al, 2017). Recent studies on nutrient budgets suggest that the atmosphere can be a significant source of nutrients that may even lead to an excess of nutrients with respect to the critical loads sustainable by habitat classes (Grimshaw and Dolske, 2002;Meyer et al, 2015;Payne et al, 2013). Nitrogen provided by wet deposition is also suggested to be one of the main factor enhancing eutrophication processes by stimulating the growth of algae, which deplete oxygen and cause suffocation of fish and other aquatic organisms in water bodies (Schindler, 2006;Naselli-Flores, 2010).…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Nitrogen Depositions in a Highly Human-Impacted Area

Stevenazzi

Camera

Masetti

et al. 2020

Water Air Soil Pollut

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Nutrients that fall on the ground from the atmosphere represent a minor component of the total nitrogen (N) input to soils, especially when compared to agricultural, civil and industrial inputs (i.e., sewage treatment plants or sewage systems, fertilizer and manure applications). However, integrating all nitrogen forms, processes and scales can represent a breakthrough challenge for the understanding and the management of the N cycle.A monitoring experiment was set up to collect wet atmospheric depositions in a human impacted area with multiple land uses, representing different emission sources. Rainwater collection was executed in the surroundings of Milan, in northern Italy, starting from February 2017 to February 2019.The presence of N compounds and their temporal variations in rainwater are consistent with pollution coming from local anthropogenic emission sources of nitrogen oxides and ammonia, mainly related to the use of the heating systems in the cold seasons and the spreading of fertilizers and manure on agricultural fields. Consequently, the total amount of N wet depositions range between 14 and about 30 kg/ha•yr in the study area.As leaching of N compounds from soils generally increases at deposition rates higher than about 10 kg(N)/ha•yr, this work suggests that the N atmospheric input to soils could not be neglected when evaluating the impacts of N sources to terrestrial and aquatic ecosystems, as well as to groundwater resources. This highlights the need of wisely integrating air, soil and water policies for minimizing the risk to deteriorate surficial ecosystems and groundwater.

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“…Sensitivity analysis starts using typical rainfall Mg 2+ contents as C OF and a couple of values coming from the linear relationship C BF -Q BF . Based on available literature data, rainfall average Mg 2+ content ranges from 0.1-0.3 mg/L in mountain areas [62][63][64][65][66][67]. The only free parameter (variable) is Q OF , related to the rainfall event intensity, giving different results of C P ( Figure 6).…”

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confidence: 99%

Magnesium as Environmental Tracer for Karst Spring Baseflow/Overflow Assessment—A Case Study of the Pertuso Karst Spring (Latium Region, Italy)

Filippi

Iacurto

Grelle

et al. 2021

Water

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Following a previous research carried out on the same site, this paper presents the update of the Mg2+ based method for the estimation of Pertuso Spring discharge, located in Central Italy. New collected data confirmed the validity of the proposed model and the conservative behaviour of Mg2+ for groundwater related to the Pertuso Spring aquifer. Further analysis allowed to obtain a local linear relationship between magnesium concentration and total spring discharge (including exploitation rate), regardless of the mixing model proposed with the Aniene River. As regards two samples which fall out of the linear relationship and could have been detected as “outliers”, more in-depth data processing and sensitivity analyses revealed that the lowering in magnesium, at equal discharges, is determined by the appearance of the quick-flow component, less mineralized and related to storm events. Results showed that under specific conditions, related to the absence or presence of previous intense rainfall events, Mg2+ could be effectively a useful tracer for separating spring conduit flow (overflow) from diffuse flow (baseflow) within the karst aquifer.

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Cited by 30 publications

References 35 publications

Dry and Wet Atmospheric Deposition Composition in Southwest Florida: Environmental and Health Implications

Dry and Wet Atmospheric Deposition Composition in Southwest Florida: Environmental and Health Implications

Atmospheric Nitrogen Depositions in a Highly Human-Impacted Area

Magnesium as Environmental Tracer for Karst Spring Baseflow/Overflow Assessment—A Case Study of the Pertuso Karst Spring (Latium Region, Italy)

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