Predicting the response of Hamilton Harbour to the nutrient loading reductions: A modeling analysis of the “ecological unknowns”

Gudimov, Alexey; Ramin, Maryam; Labencki, Tanya; Wellen, Christopher; Shelar, Milind; Shimoda, Yuko; Boyd, Duncan; Arhonditsis, George B.

doi:10.1016/j.jglr.2011.06.006

Cited by 40 publications

(9 citation statements)

References 54 publications

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“…Meanwhile, the flow-sediment regulation in the late June and the early July could also bring rich P to wetland soils, because most P from the croplands in the upstream of the Yellow River Delta could be absorbed and carried to wetlands. As TP and AP in surface soils could be more easily leached or mobilized by surface runoff (Gudimov et al, 2011), lower TP and AP levels were observed at Site 1 in summer. AP levels in surface soils of five sampling sites increased from summer to fall, which was associated with organic phosphorus mineralization and less plant uptake in fall.…”

Section: Spatial Variability Of Tp and Ap Contents In Surface Soilsmentioning

confidence: 97%

Spatial and seasonal distributions of soil phosphorus in a short-term flooding wetland of the Yellow River Estuary, China

Gao

Han

Bai

et al. 2016

Ecological Informatics

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Soil cores were collected at a depth of 60 cm along a sampling belt perpendicular to the Yellow River of the Yellow River Estuary and were collected in both summer and fall of 2007 and the spring of 2008 to investigate spatial and seasonal dynamics of soil phosphorus in a short-term flooding wetland. Our results showed that total phosphorus (TP) levels were lowest in spring, followed by those in summer and the maximum level was in fall along the sampling belt. Lower TP levels were observed at Site 3 in summer and fall, whereas the lowest TP levels appeared at Site 1 in spring. All available phosphorus (AP) levels were higher in fall than that in spring except for Site 4. However, in summer, AP contents showed a "decreasing before increasing" tendency along the sampling belt. TP contents in profile soils exhibited a decreasing tendency from summer to next spring, whereas AP levels increased slightly from summer to fall and decreased from fall to the next spring. TP contents increased and then decreased along soil profiles in summer and spring, whereas they showed a "decreasing before increasing" tendency in fall. The mean AP levels and AP: TP ratios generally decreased along soil profiles in three sampling seasons. TP stocks ranged from 419.40 mg m −2 to 578.45 mg m −2 and generally exhibited an increasing tendency from Site 1 to Site 5. Approximately 50% of TP stocks accumulated in the top 20 cm soils. Higher TP stocks in the top 60 cm soils were observed in summer and fall at each of five sampling sites than in spring (p b 0.05). Correlation analysis showed that Soil TP levels were significantly correlated with soil bulk density (BD) and salinity, and AP contents were significantly correlated with soil depth and pH values. TP stocks were significantly impacted by TP, BD and pH values.

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Section: Spatial Variability Of Tp and Ap Contents In Surface Soilsmentioning

confidence: 97%

Spatial and seasonal distributions of soil phosphorus in a short-term flooding wetland of the Yellow River Estuary, China

Gao

Han

Bai

et al. 2016

Ecological Informatics

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“…Delisting of the harbour and marsh as an Area of Concern under the Great Lakes Water Quality Agreement is anticipated in the next few years (Hall et al 2006;Theÿsmeÿer 2011); however, internal P loading remains a concern (Chow-Fraser 1998; Gudimov et al 2011) that may impede achievement of restoration goals. Specifically, high internal P loading and abundant phytoplankton may prevent reestablishment of macrophytes (Chow-Fraser 1998), which have a key role in nutrient retention capacity (Reddy and De Busk 1985;Engelhardt and Ritchie 2001).…”

Section: Coastal Wetlandsmentioning

confidence: 99%

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

Orihel

Baulch

Casson

et al. 2017

Can. J. Fish. Aquat. Sci.

197

133

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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]

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“…It is important to quantify the temporal distribution of TS in the surface soils as they could be more easily leached by runoff than other soil layers (Gudimov et al, 2011). The lowest TS contents were observed in the surface soils of Site A1 and Site A2 in both sampling seasons, which were closely related to the lateral seepage of the Yellow River.…”

Section: Horizontal Changes Of Total Sulfur Contents Of Surface Soilsmentioning

confidence: 99%

Spatial and seasonal distributions of soil sulfur in two marsh wetlands with different flooding frequencies of the Yellow River Delta, China

Bai

Han

et al. 2016

Ecological Engineering

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a b s t r a c t Soil samples from 0 to 100 cm depth were collected in eight sampling sites (Sites A1, B1, C1 and D1; Sites A2, B2, C2 and D2) respectively along two 250-m length of sampling zones (Zone N and Zone S) from the Yellow River channel to a tidal creek in the short-term flooding and seasonal flooding wetland of the Yellow River Delta of China in fall of 2007 and spring of 2008 to investigate spatial and seasonal distribution patterns of total sulfur (TS) and their influencing factors. Our results showed that TS contents in both seasons in surface soil in Zone N increased with increasing distances away from the Yellow River channel except for Site D1 in fall. However, TS contents in both seasons in surface soil in Zone S showed a tendency of increasing and then decreasing with increasing distances away from the Yellow River channel. Relative to spring, the mean TS contents in surface soils were slightly higher in fall in Zone N, whereas an opposite tendency was observed in Zone S. The mean TS stocks were obviously higher in fall with 934.36 g/m 2 and 877.77 g/m 2 compared to those in spring with 729.85 g/m 2 and 696.78 g/m 2 in Zone N and Zone S, respectively. TS contents and stock generally declined with depth along soil profiles with one accumulation peaks at a soil increment of 40-60 cm. Topsoil concentration factors also indicated that TS had shallower distribution in soil profiles. Soil total carbon (TC), total nitrogen (TN), soil organic matter (SOM), salinity and silt exerted positive loadings on TS, while soil pH and depth exhibited a negative correlation with TS content.

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Predicting the response of Hamilton Harbour to the nutrient loading reductions: A modeling analysis of the “ecological unknowns”

Cited by 40 publications

References 54 publications

Spatial and seasonal distributions of soil phosphorus in a short-term flooding wetland of the Yellow River Estuary, China

Spatial and seasonal distributions of soil phosphorus in a short-term flooding wetland of the Yellow River Estuary, China

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

Spatial and seasonal distributions of soil sulfur in two marsh wetlands with different flooding frequencies of the Yellow River Delta, China

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