Distribution of seston and nutrient concentrations in the eastern basin of Lake Erie pre- and post-dreissenid mussel invasion

North, Rebecca L.; Smith, Ralph E. H.; Hecky, Robert E.; Depew, David C.; León, Luis F. De; Charlton, Murray N.; Guildford, Stephanie J.

doi:10.1016/j.jglr.2012.06.012

Cited by 21 publications

(10 citation statements)

References 60 publications

(99 reference statements)

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“…Nearshore biota can intercept, detain, and assimilate P, thus challenging our estimations of internal P loading from sediments in nearshore regions and complicating its use as a source of P to pelagic phytoplankton. Dreissenid presence results in deeper light penetration (Higgins et al 2005;Depew et al 2011;North et al 2012), which drives the flow of energy to the lake bottom, encouraging benthic algal growth (Zhu et al 2006). Exudates released by benthic macroalgae have been shown to promote bacterial degradation (Wyatt et al 2014), contributing to oxygen-depletion in the bottom waters, which could promote P release from sediments.…”

Section: Nearshore Environmentsmentioning

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.

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181

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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: Nearshore Environmentsmentioning

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.

Self Cite

181

133

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“…The increased water clarity in Lake Simcoe since the 1980s (North et al 2013) could potentially result in a decrease in the amount of Chl-a, a light responsive pigment, per algal cell. Dreissenid grazing and photoacclimation have been linked to lower Chl-a concentrations in the nearshore of both lakes Simcoe (Guildford et al 2013) and Erie (North et al 2012). A weak relationship between Chl-a concentrations and phytoplankton biovolumes has also previously been reported for Lake Simcoe (Eimers et al 2005).…”

Section: © Her Majesty the Queen In Right Of Canada 2013mentioning

confidence: 70%

“…Similarly, phytoplankton sampled from a deepwater station (S15) near the Sutton WTP also did not show significant declines in phytoplankton biovolume . We hypothesized that the lack of observable dreissenid effects in the offshore areas of the lake may be due to a nearshore-offshore gradient in mussel filtering effects as predicted by the nearshore shunt hypothesis (Hecky et al 2004), similar to that reported in Lake Erie (Depew et al 2006, North et al 2012). …”

Section: Spatial and Temporal Dreissenid Effects In Lake Simcoementioning

confidence: 75%

Long-term seasonal effects of dreissenid mussels on phytoplankton in Lake Simcoe, Ontario, Canada

Baranowska

North

Winter

et al. 2013

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The invasion of dreissenid mussels to Lake Simcoe coincided with notable changes in the ecosystem, including a period of lower phytoplankton biovolume, particularly at shallower sites. Dreissenid grazing effects are typically most prominent during the summer season in the nearshore areas of lakes. Grazing effects in the winter are small because dreissenid filtration rates, especially those of zebra mussels (Dreissena polymorpha), decrease in cold temperatures. Phytoplankton dynamics in the winter season are poorly characterized, particularly in lakes that experience ice cover. The purpose of this study was to examine the effects of dreissenids on the seasonality of phytoplankton dynamics in the nearshore waters of the lake using long-term monitoring data from unchlorinated water treatment plant (WTP) intake pipes. The long-term dataset from the WTPs showed significant and sustained declines in phytoplankton biovolumes and chlorophyll a (Chl-a) concentrations in the 12-year period following the invasion of dreissenid mussels to Lake Simcoe. The decline was smallest during the ice-covered winter months (Jan-Mar). The fall phytoplankton peak observed in the pre-dreissenid years shifted to a smaller peak during the winter in post-dreissenid years. We hypothesized that reduced dreissenid grazing pressure during the winter, and possible improved under-ice light conditions that we attribute to climate change, may be contributing to this shift. Phytoplankton biovolume data collection continues to be important in Lake Simcoe as a measure of phytoplankton biomass. Our results also indicate that winter phytoplankton biovolumes should be considered when managing lakes experiencing both climate change and dreissenid mussel effects.

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“…Monoesters are generally considered bioavailable due to the presence of enzymes such alkaline phosphatase (EC 3.1.3.1) (Bentzen et al, 1992), but phosphodiesterases and phytases may make diesters and inotisol phosphates potentially bioavailable (Cheng and Lim, 2006). Although we do not have detailed information on the nature and composition of DOP or enzyme activity in eastern Lake Erie (but see North et al, 2012), if we assume that organic P contained within organisms in the lake is at or near equilibrium (e.g., Paytan et al, 2002, based on known fractionation factors for various DOP compounds, the δ 18 O P of released P i recycled from the DOP pool is expected to be < ∼+14‰, and even lower < +11‰ if substrates such as phytate is not a major component of the bioavailable DOP pool (Table 3). While these are generalizations, they illustrate the relative magnitude expected if regeneration of P i from DOP is an important P recycling pathway.…”

Section: Oxygen Isotope Ratios Of Phosphate Indicate Extensive Phosphmentioning

confidence: 99%

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

2018

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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.

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Distribution of seston and nutrient concentrations in the eastern basin of Lake Erie pre- and post-dreissenid mussel invasion

Cited by 21 publications

References 60 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

Long-term seasonal effects of dreissenid mussels on phytoplankton in Lake Simcoe, Ontario, Canada

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

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