Mass balance modelling and wetland restoration

Prescott, Katherine; Tsanis, Ioannis K.

doi:10.1016/s0925-8574(97)00015-3

Cited by 22 publications

(16 citation statements)

References 34 publications

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“…Specific mechanisms include bioirrigation (solute transport), bioconveying (particulate transport), and sediment mixing (Andersson et al 1988). Bottom feeding fish such as carp have been shown to contribute significantly to internal loading processes in some environments by physically disturbing fine surface sediment rich in P into the water column and thus increasing TP concentrations (Prescott and Tsanis 1997;Chow-Fraser 1998). Invertebrate tube-dwelling organisms can also disturb sediments during burrow construction.…”

Section: Benthic Bioturbation Bioirrigation and Vertical Migrationmentioning

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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Section: Benthic Bioturbation Bioirrigation and Vertical Migrationmentioning

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

View full text Add to dashboard Cite

show abstract

“…As previously indicated, Prescott & Tsanis (1997) estimated an internal load in Cootes Paradise Marsh of 23.7 kg·d -1 (assuming 57% of 41.6 kg·d -1 , their values), which could be apportioned among carp bioturbation, wind resuspension and mineralization (Table 4); however, this estimate was made prior to the construction of the Cootes Paradise Fishway, which has effectively excluded 90% of the carp from the marsh since 1997. Using exclosure experiments, Lougheed et al (1998) demonstrated that exclusion of carp reduced water turbidity and nutrients up to 45%.…”

Section: Resultsmentioning

confidence: 98%

“…3 Prescott & Tsanis (1997) patterns. Therefore, site selection should be based on any number of characteristics including the purpose of the study, sediment type, known chemical characteristics of the sediment, the presence or absence of macrophytes, water flow patterns or water quality.…”

Section: Discussionmentioning

confidence: 99%

“…In shallow systems (i.e., Cootes Paradise Marsh) without emerging vegetation, wind and bioturbation processes dominate P releases (Marsden 1989). 2 Internal loading was assumed to be 57% of the total external load prior to exclusion of carp (Prescott & Tsanis 1997). The contribution from carp was assumed to be 45% of the external load which therefore generated an estimated 13.0 kg·d -1 once large carp were excluded by a barrier.…”

Section: Discussionmentioning

confidence: 99%

“…1) is an example of such an ecosystem that was degraded after more than sixty years of nutrient and sediment enrichment from a local sewage treatment plant. As part of an overall marsh restoration program, a nutrient mass balance study was conducted by Prescott & Tsanis (1997) to determine the relative contributions of all phosphorus sources. They found that during the summer months, internal phosphorus sources, which they identified to be wind-induced sediment resuspension and bioturbation by a fish population dominated by common carp, accounted for 57% of the total phosphorus load.…”

mentioning

confidence: 99%

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