Internal loading of phosphate in Lake Erie Central Basin

Paytan, Adina; Roberts, Kathryn; Watson, Sue B.; Peek, Sara; Chuang, Po-Yu; Defforey, D.; Kendall, Carol

doi:10.1016/j.scitotenv.2016.11.133

Cited by 117 publications

(52 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They also measured significantly higher summertime L gross under anaerobic conditions (6.01 SRP·m −2 ·day −1 , range 1.84-8.18) relative to aerobic conditions (1.35 mg SRP·m −2 ·day −1 , range 0.95-1.79) more reflective of the oxygen concentrations in the western basin (Matisoff et al 2016). Their year-round aerobic L gross estimates represented 3%-7% of the target external P load (11 000 mg P·year −1 ) with the spatial distribution of TP in surficial sediments indicating that the external loads from the tributaries, and in particular, the Maumee River, are the source of P. Recent work in the central basin of Lake Erie reports L gross based on aerobic and anaerobic sediment core incubation experiments and pore-water P concentration profiles ranging from 0.05 mg TDP to 0.58 mg SRP·m −2 day −1 (Paytan et al 2017). These internal P fluxes represent 8%-20% of the total external input to the western basin of Lake Erie (Paytan et al 2017).…”

Section: Lake Eriementioning

confidence: 99%

“…Their year-round aerobic L gross estimates represented 3%-7% of the target external P load (11 000 mg P·year −1 ) with the spatial distribution of TP in surficial sediments indicating that the external loads from the tributaries, and in particular, the Maumee River, are the source of P. Recent work in the central basin of Lake Erie reports L gross based on aerobic and anaerobic sediment core incubation experiments and pore-water P concentration profiles ranging from 0.05 mg TDP to 0.58 mg SRP·m −2 day −1 (Paytan et al 2017). These internal P fluxes represent 8%-20% of the total external input to the western basin of Lake Erie (Paytan et al 2017). A unique and novel approach using the isotopic signature of phosphate in the extractable fraction of the sediments was used to illustrate that the sediments are an important internal source of P to the central basin of Lake Erie (Paytan et al 2017).…”

Section: Lake Eriementioning

confidence: 99%

“…These internal P fluxes represent 8%-20% of the total external input to the western basin of Lake Erie (Paytan et al 2017). A unique and novel approach using the isotopic signature of phosphate in the extractable fraction of the sediments was used to illustrate that the sediments are an important internal source of P to the central basin of Lake Erie (Paytan et al 2017). Mass balance modelling efforts for the entirety of Lake Erie indicate that it is a net sink of P (Katsev 2017) as was reported for the western basin (Matisoff et al 2016).…”

Section: Lake Eriementioning

confidence: 99%

See 2 more Smart Citations

Internal phosphorus loading in Canadian fresh waters: a critical review and data analysis

Orihel

Baulch

Casson

et al. 2017

Can. J. Fish. Aquat. Sci.

180

130

View full text Add to dashboard Cite

Many physical, chemical, and biological processes in freshwater ecosystems mobilize the nutrient phosphorus (P) from sediments, which in turn may contribute to the formation of harmful algal blooms. Here, we critically reviewed internal P loading in Canadian fresh waters to understand the geographic patterns and environmental drivers of this important process. From 43 publications, we consolidated 618 estimates of internal P loading from Canadian freshwater ponds, lakes, reservoirs, and coastal wetlands (n = 70). Expressed in terms of total P, short-term gross rates in sediment samples (L gross ) ranged from −27 to 54 mg·m −2 ·day −1 (n = 461), while long-term net rates in whole ecosystems (L net ) ranged from −1694 to 10 640 mg·m −2 ·year −1 (n = 157). The main environmental drivers of this variation were oxygen, pH, geology, and trophic state. Internal P loading tended to be higher during the open-water season and most prominent in small prairie lakes. Priorities for future research on internal P loading should include resolving methodological problems, assessing the relative importance of different mechanisms, examining the influence of anthropogenic activities, and quantifying rates in understudied ecosystems. Résumé :De nombreux processus physiques, chimiques et biologiques dans les écosystèmes d'eau douce mobilisent le phosphore (P), un élément nutritif, des sédiments, ce qui peut favoriser la formation de fleurs d'eau néfastes. Nous avons effectué un examen critique de l'apport interne de P dans les plans d'eau douce canadiens afin de comprendre les motifs de répartition géographique et les facteurs environnementaux qui influent sur cet important processus. À la lumière de 43 publications, nous avons colligé 618 estimations de l'apport interne de P d'étangs, de lacs, de réservoirs et de milieux humides littoraux d'eau douce canadiens (n = 70). Exprimés en termes de P total, les taux d'apport de P à court terme pour les échantillons de sédiments (L gross ) vont de −27 à 54 mg·m -2 ·jour -1 (n = 461), alors que les taux nets à long terme à l'échelle de l'écosystème (L net ) vont de −1694 à 10 640 mg·m -2 ·an -1 (n = 157). Les principaux facteurs environnementaux influant sur ces variations sont l'oxygène, le pH, la géologie et l'état trophique. L'apport interne de P tend à être plus élevé durant la période d'eau libre et le plus marqué dans les petits lacs de prairie. La priorité des travaux futurs sur l'apport interne de P devrait porter sur la résolution de problèmes méthodologiques, l'évaluation de l'importance relative de différents mécanismes, l'examen de l'influence des activités humaines et la quantification des taux dans les écosystèmes sous-étudiés. [Traduit par la Rédaction]

show abstract

Section: Lake Eriementioning

confidence: 99%

Section: Lake Eriementioning

confidence: 99%

Section: Lake Eriementioning

confidence: 99%

See 1 more Smart Citation

Internal phosphorus loading in Canadian fresh waters: a critical review and data analysis

Orihel

Baulch

Casson

et al. 2017

Can. J. Fish. Aquat. Sci.

180

130

View full text Add to dashboard Cite

show abstract

“…For example, the P i pool may be affected to varying degrees by the intensity of (1) P i that has been equilibrated internally and released by microbes and/or phytoplankton (Blake et al, 1997;Paytan et al, 2002), (2) P i excreted by zooplankton (Taylor and Lean, 1981), (3) remineralization of DOP excreted by phytoplankton (Bentzen et al, 1992) or liberated via zooplankton grazing and/or viral lysis (Taylor and Lean, 1981), and (4) mixing with an external P i source with a distinct δ 18 O P (Paytan et al, 2017). The strong negative deviations from theoretical equilibrium values observed here are anticipated in systems where ambient levels of P are limiting and arise due to the large inheritance effects associated with isotopic fractionation during the incorporation of water oxygen into the P i ion during enzymatic hydrolysis Blake, 2006, 2009).…”

Section: Oxygen Isotope Ratios Of Phosphate Indicate Extensive Phosphmentioning

confidence: 99%

“…Subsequent investigations have suggested that this P i is derived primarily by redox mediated release from anoxic sediments in the central basin (Paytan et al, 2017). Given the apparent success at identifying different P i sources in central and western Lake Erie and the residual uncertainty regarding the relevance of external vs. internal sources of P i associated with Cladophora blooms, we sought to apply this approach to (1) examine the influence of the Grand River on nearshore phosphorus concentrations (2) investigate the utility of stable isotopes of oxygen in phosphate for differentiating P i sources in the nearshore of the eastern basin and (3) to improve our understanding of P dynamics in a dynamic coastal environment.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus Dynamics and Availability in the Nearshore of Eastern Lake Erie: Insights From Oxygen Isotope Ratios of Phosphate

2018

View full text Add to dashboard Cite

Blooms of filamentous benthic algae that plagued Lake Erie in the 1950s through 1970s were largely reduced through reductions of phosphorus (P) loading from point sources.Since the mid-1990s, these blooms have returned despite a period of relatively stable external P inputs. While increased loadings of dissolved P have been causally linked to cyanobacterial blooms in some parts of the lake, the impacts of ecosystem changes such as the effect of invasive species on nutrient cycling and availability have not been fully elucidated, leading to uncertainty as to the effectiveness of additional non-point P management actions. Here we use the oxygen isotope ratios (δ 18 O P ) of phosphate in concert with measures of water quality along the northern shore of the east basin of Lake Erie to identify sources and pathways of P cycling and infer potential importance in relation to annual blooms of Cladophora that foul the shorelines of eastern Lake Erie. δ 18 O P data indicate that potential external source signatures are rapidly overprinted by biological cycling of P by the plankton community and that much of the available phosphate in the nearshore waters is derived from hydrolysis of dissolved organic P compounds. Near the dreissenid-colonized lake bed, δ 18 O P was persistently and significantly enriched in 18 O relative to δ 18 O P measured in surface waters and was similar to δ 18 O P of phosphate excreted by dreissenid mussels in incubations. These results implicate dreissenid mussels as key agents in nearshore P cycling and highlight the importance of considering ecosystem changes in the development of nutrient management strategies designed to ameliorate symptoms of eutrophication.

show abstract

High‐turbidity events in Western Lake Erie during ice‐free cycles: Contributions of river‐loaded vs. resuspended sediments

Niu

Xia

Ludsin

et al. 2018

Limnology & Oceanography

View full text Add to dashboard Cite

High‐turbidity events (HTEs) are common phenomena in shallow‐water environments that can alter ecological interactions. The relative contributions of river input (external loading) vs. resuspension (internal loading) to the occurrence, duration, and influenced areas of HTEs are not fully understood in most systems, owing to the lack of long‐term, source‐specified sediment maps. Using a Finite Volume Community Ocean Model‐based wave‐current forced sediment model, we investigated sediment dynamics in the shallow, river‐dominated Western Lake Erie during ice‐free cycles (April–November) of 2002–2012. Results indicated that wind waves predominated sediment dynamics in the offshore areas, with river discharges causing substantial inshore to offshore gradients. Owing to varying wind waves and river discharges, both the mean and extreme sediment dynamics had distinctive seasonal variations. The basin was turbid during spring and fall, with frequent (> 15%), broad (O [102–103 km2]), and more persistent (means of 3.2/4.4 d during spring/fall) HTEs caused mainly by resuspension events. During summer, the basin was clearer with occasional (< 1%), small (O [1–102 km2]), and short (mean of 1.5 d) HTEs near the mouths generated by pulsing river loadings. Although river loading rarely induced basin‐wide HTEs, they were important during floods, enlarging the high‐turbidity areas by 11.3%. Overall, by delineating the drivers of HTEs in Western Lake Erie, this study furthered the understanding of sediment dynamics in shallow ecosystems and provides a basis for investigating the ecological impact of sediments from different sources in river‐ and wave‐energetic systems.

show abstract

Internal loading of phosphate in Lake Erie Central Basin

Cited by 117 publications

References 55 publications

Internal phosphorus loading in Canadian fresh waters: a critical review and data analysis

Internal phosphorus loading in Canadian fresh waters: a critical review and data analysis

Phosphorus Dynamics and Availability in the Nearshore of Eastern Lake Erie: Insights From Oxygen Isotope Ratios of Phosphate

High‐turbidity events in Western Lake Erie during ice‐free cycles: Contributions of river‐loaded vs. resuspended sediments

Contact Info

Product

Resources

About