Spatiotemporal variations of nitrogen and phosphorus in a clay plain hydrological system in the Great Lakes Basin

Rixon, Sarah; Levison, Jana; Binns, Andrew D.; Persaud, Elisha

doi:10.1016/j.scitotenv.2019.136328

Cited by 28 publications

(13 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Given that BFI is approximately the fraction of streamflow supplied by groundwater discharge (Neff et al, 2005) 4). Although uncertainties remain (see S2 in supporting information), this interpretation is in strong contrast to that of Rixon et al (2020), who concluded that groundwater flux as a source of nutrients to another agriculturedominated headwater stream in southern Ontario could be considered "minimal" compared to overland flow and tile discharge.…”

Section: Loading Of Nutrients From Groundwater As Bf Eementioning

confidence: 79%

“…Nutrient fluxes from agricultural catchments may result in excessive loading of nutrients to streams (e.g., Bol et al, 2018; Miller et al, 1982; Neilsen et al, 1982; Tomer et al, 2003), which potentially harms aquatic life, and may result in eutrophication and hypoxia in receiving waters (e.g., Basu et al, 2011; Burkart & James, 1999; Macrae et al, 2021; Rixon et al, 2020). Major fractions of the fluxes of water and nutrients from land to aquatic ecosystems take place in headwater catchments (Abbott et al, 2018; Alexander et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nutrient delivery by groundwater discharge to headwater streams in agricultural catchments

Stempvoort

MacKay

Collins

et al. 2022

Hydrological Processes

View full text Add to dashboard Cite

Nutrient concentrations in riparian groundwater are variable from site to site, making it challenging to use these data to quantify nutrient fluxes contributed by groundwater discharge to headwater streams. Instead, we define event‐excluded baseflow (BFEE), and use stream discharge data and stream samples collected during BFEE to estimate groundwater discharge and loading of nutrients to the streams. Based on this method, in two study catchments (Thames River basin, Ontario, Canada) groundwater discharge during BFEE contributed about 30% of the total streamflow and 20%–30% of the total loading of soluble reactive phosphorus (SRP) and nitrate. Previous estimates of baseflow using hydrographic separation techniques indicate that groundwater discharge likely contributes even larger fractions, ~50%–60% of flow in these catchments. We infer that groundwater likely contributes ~40% of the annual SRP load and ~ 50%–60% of the nitrate‐N load. These results indicate that groundwater discharge plays an important role in the nutrient loading to headwater streams. This reinforces the findings of earlier studies that have inferred a dominant influence of legacy reservoirs of nutrients in the subsurface of similar agricultural catchments on the loads of these nutrients in headwater streams.

show abstract

Section: Loading Of Nutrients From Groundwater As Bf Eementioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Nutrient delivery by groundwater discharge to headwater streams in agricultural catchments

Stempvoort

MacKay

Collins

et al. 2022

Hydrological Processes

View full text Add to dashboard Cite

show abstract

“…In human-dominated landscapes, nutrients from human waste and agricultural fertilizers are transported to lakes largely by surface waters, especially rivers. Agricultural and urban nutrient pollution often cause surface-water nutrient concentrations to exceed those of the groundwater (figure 7 a), even in areas with shallow groundwater pollution (Rixon et al 2020 ). Nutrients accumulate in the sediment pore water owing to successive cycles of settling and remineralization of particulate nutrients in the lake.…”

Section: Hypothesis 1: Enhanced Nutrient Loading To or Through Catchments Promote Fabsmentioning

confidence: 99%

Blue Waters, Green Bottoms: Benthic Filamentous Algal Blooms Are an Emerging Threat to Clear Lakes Worldwide

Vadeboncoeur¹,

Moore

Stewart

et al. 2021

BioScience

View full text Add to dashboard Cite

Nearshore (littoral) habitats of clear lakes with high water quality are increasingly experiencing unexplained proliferations of filamentous algae that grow on submerged surfaces. These filamentous algal blooms (FABs) are sometimes associated with nutrient pollution in groundwater, but complex changes in climate, nutrient transport, lake hydrodynamics, and food web structure may also facilitate this emerging threat to clear lakes. A coordinated effort among members of the public, managers, and scientists is needed to document the occurrence of FABs, to standardize methods for measuring their severity, to adapt existing data collection networks to include nearshore habitats, and to mitigate and reverse this profound structural change in lake ecosystems. Current models of lake eutrophication do not explain this littoral greening. However, a cohesive response to it is essential for protecting some of the world's most valued lakes and the flora, fauna, and ecosystem services they sustain.

show abstract

“…It should be pointed out that the parameters and accuracy of the models used in this study may also have a certain impact on the final results. However, geostatistical analysis is a method commonly used by scholars, and the calculation results of the model after accuracy evaluation have reference value [24]. e N/P ratio in the study area was lower than the average value of soil N/P in China (4.2), indicating that the soil in the study area was in a nitrogen-limited state.…”

Section: Chemical Metrological Characteristics Of Soil Nitrogen Andmentioning

confidence: 94%

Spatial Differentiation of Ecological Stoichiometry of Nitrogen and Phosphorus in Mollic Epipedon of China

2022

International Journal of Chemical Engineering

View full text Add to dashboard Cite

Nitrogen (N) and phosphorus (P) are essential elements for crop growth. The study on the spatial differentiation characteristics of soil N and P can provide a theoretical basis for regional fertilization as well as prevention and control of agricultural surface pollution. Taking the typical mollic epipedon area in Northeast China as study area, using the geostatistical model and 3S technology (Remote Sensing, RS; Geography information systems, GIS; and Global positioning systems, GPS), the spatial variation and influencing factors of N and P ecological stoichiometry in the surface soil (0-20 cm) were studied with 1,057 samples by five-point soil sampling method. The outcomes of the study showed that the average total nitrogen (TN), total phosphorus (TP), and N/P ratio were 1.88 g/kg, 0.276 g/kg, and 6.81, respectively. The degree of spatial variation is moderate, and structural factors such as topography and soil parent material are the main factors affecting the spatial variation of soil TN, TP content, and N/P ratio. Vegetation primarily affects the soil TN, TP contents, and N/P specific spatial variation. Soil TN and TP contents showed a downward trend from the northeast to the southwest region of the study. Different approaches of balanced fertilization, soil and water conservation, and reasonable spatial allocation are beneficial to improving the balance of soil N and P in the typical mollic epipedon area of Northeast China.

show abstract

Spatiotemporal variations of nitrogen and phosphorus in a clay plain hydrological system in the Great Lakes Basin

Cited by 28 publications

References 38 publications

Nutrient delivery by groundwater discharge to headwater streams in agricultural catchments

Nutrient delivery by groundwater discharge to headwater streams in agricultural catchments

Blue Waters, Green Bottoms: Benthic Filamentous Algal Blooms Are an Emerging Threat to Clear Lakes Worldwide

Spatial Differentiation of Ecological Stoichiometry of Nitrogen and Phosphorus in Mollic Epipedon of China

Contact Info

Product

Resources

About