Chemical and thermal stratification in lakes

Yu, Hui; Tsuno, Hiroshi; Hidaka, Taira; Chen, Jiao

doi:10.1007/s10201-010-0310-8

Cited by 53 publications

(27 citation statements)

References 13 publications

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“…Thermal stratification is a key feature in understanding the structure and function of lentic ecosystems (Mazumder et al, 1990;Wilhelm and Adrian, 2008;Yu et al, 2010). We found an influence of stratification on vertical nutrient gradients, particularly with different P components in the water column.…”

Section: Maymentioning

confidence: 87%

Thermal stratification patterns in urban ponds and their relationships with vertical nutrient gradients

Song

Xenopoulos

Buttle

et al. 2013

Journal of Environmental Management

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Section: Maymentioning

confidence: 87%

Thermal stratification patterns in urban ponds and their relationships with vertical nutrient gradients

Song

Xenopoulos

Buttle

et al. 2013

Journal of Environmental Management

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“…Metalimnion [N 2 ] excess data were divided into early and late summer subsets and compared with reservoir stratification stability. Changes in the thermocline depth and temperature were assumed to be indicative of partial mixing events and were described through the stratification stability index (SSI; Yu et al 2010), which was calculated for each reservoir on each date as…”

Section: Methodsmentioning

confidence: 99%

Partitioning whole‐lake denitrification using in situ dinitrogen gas accumulation and intact sediment core experiments

Grantz

Kogo

Scott

2012

Limnology & Oceanography

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We measured in situ hypolimnion and metalimnion dinitrogen (N 2 ) accumulation rates and N 2 production from sediments in contact with the reservoir epilimnia for 3 small (, 1 km 2 ) and shallow reservoirs with inherently low stratification stability. Hypolimnion areal denitrification rates ranged from 98.6 to 168 mmol N 2 -N m 22 h 21 , while metalimnion rates were up to two times greater. A laboratory experiment simulating the temporary breakdown and reestablishment of the oxycline confirmed that short-term metalimnetic denitrification could be important in reactive nitrogen (N) loss in these reservoirs. Net denitrification occurred in sediments in contact with reservoir epilimnia during seasonal mixing, but net N 2 fixation occurred in these sediments during stratification. The observed shift between net denitrification and net N 2 fixation in epilimnetic sediments corresponded with an annual cycle of nitrate availability in the epilimnia. Annual whole-reservoir denitrification rates ranged from 12 to 23 g N m 22 yr 21 . The hypolimnion contribution to annual denitrification was 16-25%. Sediments in contact with epilimnia were the greatest N 2 source in all of the reservoirs. However, denitrification in the anoxic metalimnion was of similar magnitude to denitrification in epilimnetic sediments at one reservoir, and variability in metalimnetic denitrification rates was related to the strength of stratification stability. Integrating habitat-specific measurements into whole-lake denitrification rates showed that hydrologically dynamic habitats represent important denitrification hotspots, and that periodic disturbances fuel hot moments for denitrification.

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“…We assessed water-column stability by calculating the Stratification Stability Index (SSI) with methods described by Yu et al (2010) and Grantz et al (2012). An SSI > 1°C/m suggests the existence of a thermocline, and increasing or decreasing SSI indicates increasing or decreasing stability (Horne and Goldman 1994).…”

Section: In-lake Chemical and Biological Measurements: 2007-2008mentioning

confidence: 99%

The influence of rainfall on taste and odor production in a south-central USA reservoir

et al. 2014

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Changing rainfall patterns resulting from climate change are predicted to influence cyanobacterial blooms and associated production of toxins and other metabolites, but few studies have demonstrated this link. We explored seasonal and interannual trends in 2-methylisoborneol (MIB) concentrations and the correlation of these data with rainfall and hydrologic data from 2000 to 2013. We also conducted a detailed study of cyanobacterial abundances and MIB during 2 hydrologically extreme years, a prolonged drought in 2007 followed by an extremely wet year in 2008. The goal was to assess whether cyanobacterial abundances and explanatory variables that are often correlated with cyanobacterial abundances were useful predictors of MIB concentration. From 2000 to 2013, mean annual rainfall was negatively related to mean annual MIB (r = −0.50, p = 0.08) and explained 25% of the variation in MIB. In 2007, MIB and cyanobacterial abundance were high, whereas in 2008, MIB and cyanobacterial abundance were low. The total N ∶ total P (TN ∶ TP) mass ratio was strongly related to MIB concentration during the drought and explained 44% of the variation in MIB concentration (r = −0.66, p = 0.003). Our results suggest that rainfall and the TN ∶ TP mass ratio may be useful predictors for MIB in drinking-water reservoirs.

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Chemical and thermal stratification in lakes

Cited by 53 publications

References 13 publications

Thermal stratification patterns in urban ponds and their relationships with vertical nutrient gradients

Thermal stratification patterns in urban ponds and their relationships with vertical nutrient gradients

Partitioning whole‐lake denitrification using in situ dinitrogen gas accumulation and intact sediment core experiments

The influence of rainfall on taste and odor production in a south-central USA reservoir

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