Role of land cover and hydrology in determining nutrients in mid-continent reservoirs: implications for nutrient criteria and management

Jones, John R.; Knowlton, Matthew F.; Obrecht, Daniel V.

doi:10.1080/07438140809354045

Cited by 52 publications

(60 citation statements)

References 25 publications

(32 reference statements)

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“…Summer monitoring data were used to calculate the mean concentration of total phosphorus (TP) and total nitrogen (TN) in the 156 reservoirs included in this analysis (30 reservoirs have been added to the data base used in Jones et al 2008a). Individual reservoirs are represented in the data set by collections from 4 to 27 summer seasons (described in Jones et al 2008b).…”

Section: Methodsmentioning

confidence: 99%

“…To accommodate values of 0 and 1, 0.003 was added to values <0.5 and subtracted from values >0.5 before transformation. Flushing rate was transformed using a version of the Vollenweider equation (Jones et al 2008a) to reflect the expected curvilinear response of nutrients to hydrology. Other variables were transformed to natural logs before analysis.…”

Section: Methodsmentioning

confidence: 99%

“…Studies of Midwest reservoirs show nutrient concentrations are directly correlated with contemporaneous land cover, exhibiting a positive relationship with cropland (a surrogate for nonpoint-source nutrient loss from agriculture) and a negative relationship with forest (Knoll et al 2003. Including physical metrics representing morphology and hydraulic flushing rates into cross-system models accounts for additional variance in the reservoir nutrient data , Jones et al 2008a). This outcome is consistent with the understanding that nutrient loading, depth and hydraulic residence time determine lake and reservoir nutrient levels (Welch and Jacoby 2004).…”

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confidence: 99%

“…Our research objective was to determine if any characteristic of historic vegetative cover from survey records at the time of Euro-American settlement (circa 1815-1850) explains variation in the nutrient levels of present day Missouri impoundments or accounts for residual variation in our contemporaneous land cover-nutrient models , Jones et al 2008a). The analysis was based on an expanded data set (n = 156, Jones et al 2008b).…”

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confidence: 99%

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Role of contemporary and historic vegetation on nutrients in Missouri reservoirs: implications for developing nutrient criteria

Jones

Knowlton

Obrecht

et al. 2009

Lake and Reservoir Management

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Role of contemporary and historic vegetation on nutrients in Missouri reservoirs: implications for developing nutrient criteria

Jones

Knowlton

Obrecht

et al. 2009

Lake and Reservoir Management

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“…Precipitation variability can generate different kinds of seasonal patterns, modifying water turnover time and changing the intensity of environmental processes. An example is the increase of the external loading of nutrients, organic matter and pollutants linked to intense rainfall events (Armengol et al, 1994(Armengol et al, , 1999Catalan and Fee, 1994;Soria et al, 2000;Wetzel, 2001;Marcé et al, 2006;Jones et al, 2008). Consequently, zooplankton is constantly exposed to a great variation of environmental factors, whose fluctuations constrain the size, reproduction and survival of populations.…”

Section: Introductionmentioning

confidence: 99%

Limnological variations of a deep reservoir in periods with distinct rainfall patterns

Geraldes

George²

2013

Acta Limnol. Bras.

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Aim: This study intends to provide information on how precipitation variation may impact environmental parameters (total phosphorus, water temperature, pH, conductivity, dissolved oxygen, Secchi depth, chlorophyll a and Anabaena abundance) and crustacean zooplankton composition and abundance. Methods: Samples were collected monthly from October 2000 to September 2002 and from October 2007 to September 2009 at one single sampling station located at the deepest point of the reservoir. All data were obtained in the euphotic zone. Results: The highest values of total phosphorous concentrations were reported together with the maximal values of precipitation. Conversely, conductivity decreased during the wet periods. Anabaena presence was only detected between September and December 2001. Daphnia longispina total abundance showed large inter-annual differences. A clear seasonal pattern was inferred for Diaphanosoma brachyurum and Ceriodaphnia pulchella. Both species are thermophilic and begin to be detected in early summer when the water temperature is around 15 °C. Copidodiaptomus numidicus abundance did not present a clear seasonal pattern. Conclusions: Some of the observed shifts in environmental parameters (Conductivity, total phosphorus concentrations and Anabaena abundance) resulting in changes in zooplankton abundance are induced by rainfall variation. The most affected species were those with a lack of seasonality (C. numidicus) or species occurring mainly in winter/early summer (Daphnia longispina). However, a wide range of physical, chemical and biotic interactions is likely to influence zooplankton abundance. Therefore, caution is advised when relating the observed variation exclusively with rainfall intensity. In fact, some of the observed shifts were induced by other factors varying subtly in a seasonal or inter-annual pattern, independently of rainfall intensity.Keywords: rainfall, wet and dry periods, deep reservoir limnology, crustacean zooplankton assemblage, Anabaena flos-aquae. Resumo: Objectivo:Com o presente estudo pretende-se obter informação sobre os impactos da variação da precipitação nas concentrações de fósforo total, de clorofila a, oxigénio dissolvido, condutividade e profundidade do disco de Secchi, bem como na abundância de Anabaena flos-aquae e das espécies mais abundantes de crustáceos zooplactónicos. Métodos: As amostragens foram realizadas mensalmente de Outubro de 2000 a Setembro de 2002 e de Outubro de 2007 a Setembro de 2009 num único ponto localizado na zona mais profunda do reservatório. Todos os dados foram obtidos na zona eufótica. Resultados: As concentrações de fósforo total foram mais elevadas durante os períodos de maior precipitação. Por seu turno, a condutividade decresceu durante os períodos mencionados. Anabaena só foi detetada entre Setembro e Dezembro de 2001. A abundância de Daphnia longispina sofreu grandes variações durante o decurso deste estudo. Diaphanosoma brachyurum e Ceriodaphnia pulchella apresentaram sempre um forte padrão sazonal. Ambas as espéc...

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Granular measures of agricultural land use influence lake nitrogen and phosphorus differently at macroscales

Stachelek

Weng

Carey

et al. 2020

Ecological Applications

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Agricultural land use is typically associated with high stream nutrient concentrations and increased nutrient loading to lakes. For lakes, evidence for these associations mostly comes from studies on individual lakes or watersheds that relate concentrations of nitrogen (N) or phosphorus (P) to aggregate measures of agricultural land use, such as the proportion of land used for agriculture in a lake's watershed. However, at macroscales (i.e., in hundreds to thousands of lakes across large spatial extents), there is high variability around such relationships and it is unclear whether considering more granular (or detailed) agricultural data, such as fertilizer application, planting of specific crops, or the extent of near-stream cropping, would improve prediction and inform understanding of lake nutrient drivers. Furthermore, it is unclear whether lake N and P would have different relationships to such measures and whether these relationships would vary by region, since regional variation has been observed in prior studies using aggregate measures of agriculture. To address these knowledge gaps, we examined relationships between granular measures of agricultural activity and lake total phosphorus (TP) and total nitrogen (TN) concentrations in 928 lakes and their watersheds in the Northeastern and Midwest U.S. using a Bayesian hierarchical modeling approach. We found that both lake TN and TP concentrations were related to these measures of agriculture, especially near-stream agriculture. The relationships between measures of agriculture and lake TN concentrations were more regionally variable than those for TP. Conversely, TP concentrations were more strongly related to lake-specific measures like depth and watershed hydrology relative to TN. Our finding that lake TN and TP concentrations have different relationships with granular measures of agricultural activity has implications for the design of effective and efficient policy approaches to maintain and improve water quality.

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Role of land cover and hydrology in determining nutrients in mid-continent reservoirs: implications for nutrient criteria and management

Abstract: Role of land cover and hydrology in determining nutrients in mid-continent reservoirs: implications for nutrient criteria and management, Lake and Reservoir Management, 24:1, 1-9,

Cited by 52 publications

References 25 publications

Role of contemporary and historic vegetation on nutrients in Missouri reservoirs: implications for developing nutrient criteria

Role of contemporary and historic vegetation on nutrients in Missouri reservoirs: implications for developing nutrient criteria

Limnological variations of a deep reservoir in periods with distinct rainfall patterns

Granular measures of agricultural land use influence lake nitrogen and phosphorus differently at macroscales

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