Lake Huron’s Phosphorus Contributions to the St. Clair–Detroit River Great Lakes Connecting Channel

Scavia, Donald; Anderson, Eric J.; Dove, Alice; Hill, Brad; Long, Christopher; Wang, Yu-Chen

doi:10.1021/acs.est.0c00383

Cited by 12 publications

(1 citation statement)

References 35 publications

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“…For example, Scavia et al 8 suggested that if the Lake Huron P load cannot be decreased, and further reduction from the system's major water treatment plant (WTP) is not considered because it has already met its target, then other watershed sources will need to decline by 72% to meet an overall 40% reduction target�a significant challenge that needs additional evaluation. Scavia et al 18 subsequently used a hydrodynamic model, satellite images of resuspension events and ice cover, wave hindcasts, and continuous turbidity measurements at the outlet of Lake Huron to provide evidence that this additional P load, in the form of sediment transport, is from wave-induced resuspended Lake Huron sediment, primarily within 30 km of the Ontario nearshore. They also suggested that the additional load increased over time as ice cover decreased due to climate warming.…”

Section: ■ Introductionmentioning

confidence: 99%

Wind-Driven Sediment Resuspension in the World’s Fourth Largest Lake Contributes Substantial Phosphorus Load to the 11th Largest Lake

Scavia

Calappi

Godwin

et al. 2022

Environ. Sci. Technol.

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Capturing precipitation-based episodes is a longstanding issue for estimating tributary loads; however, wind-driven resuspension in Lake Huron creates similar uncertainties in its estimated load to Lake Erie. Recent suggestions that the phosphorus load from Lake Huron is underestimated because sampling frequencies miss contributions from resuspension events are speculative because they did not include direct load measurements, address all resuspension regions, or assess the potential bioavailability of the load. We address these shortcomings by evaluating Lake Huron's nearshore regions, characterizing the biological availability of the load, and providing direct comparisons of load estimates with and without the resuspended load. We show that total phosphorus concentrations in Lake Huron and the St. Clair River are higher during resuspension events and that bioavailability of that material is comparable to that reported elsewhere. New load estimates, based on continuous turbidity measurements converted to phosphorus through P-turbidity relationships, were almost 90% higher than traditional load estimates, providing empirical evidence for the significantly underestimated previous load. This confirmation is important because if the Lake Huron load is not decreased, reductions from other sources would be needed to meet the overall reduction targets set by the binational Great Lakes Water Quality Agreement.

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Section: ■ Introductionmentioning

confidence: 99%

Wind-Driven Sediment Resuspension in the World’s Fourth Largest Lake Contributes Substantial Phosphorus Load to the 11th Largest Lake

Scavia

Calappi

Godwin

et al. 2022

Environ. Sci. Technol.

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Soil Phosphorus Transport in Response to Climate Change at Mid‐High Latitudes Under Intensive Agriculture

Lou,

Zhou,

Ren

et al. 2024

Land Degrad Dev

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Phosphorus (P) is an important soil element for sustaining plant growth and the integrity of terrestrial ecosystems, and the soil P cycle is strongly influenced by climate change and agricultural activities. However, little is known about how soil P has evolved with climate change and intensive agriculture at mid‐high latitudes, where the soil P cycle is sensitive to climate change. To answer this question, an ecohydrological model (EcoHAT‐P) driven by remote sensing data was used in this study to calculate soil P concentration and loss and was calibrated and validated using 272 soil samples collected in the Sanjiang Plain, a typical mid‐high latitude region with a long history of strong agricultural activity. Soil P concentration and loss, and plant uptake of soil P, were analyzed for the years 2000–2019 and 2020–2040. The results showed that soil total P, soil P loss, and plant P uptake all increased under intensive agriculture. The soil P cycle at mid‐high latitudes was more sensitive to temperature than to precipitation. Increased temperature would increase soil P loss and plant P uptake by 93.94% and 8.16%, respectively, and soil legacy P from intensive agriculture would become the main source even if external P inputs were eliminated. The results highlight the evolution of soil P transport at mid‐high latitudes and clarify the response of soil P cycle to climate change under intensive agriculture.

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Long-term phosphorus mass-balance of Lake Erie (Canada-USA) reveals a major contribution of in-lake phosphorus loading

Bocaniov

Scavia

Cappellen

2023

Ecological Informatics

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Lake Huron’s Phosphorus Contributions to the St. Clair–Detroit River Great Lakes Connecting Channel

Cited by 12 publications

References 35 publications

Wind-Driven Sediment Resuspension in the World’s Fourth Largest Lake Contributes Substantial Phosphorus Load to the 11th Largest Lake

Wind-Driven Sediment Resuspension in the World’s Fourth Largest Lake Contributes Substantial Phosphorus Load to the 11th Largest Lake

Soil Phosphorus Transport in Response to Climate Change at Mid‐High Latitudes Under Intensive Agriculture

Long-term phosphorus mass-balance of Lake Erie (Canada-USA) reveals a major contribution of in-lake phosphorus loading

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