Diel cycling of nutrients

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What species of interest?NITROGEN• Nitrate• NO 3-• Nitrite• NO 2-• Nitrous oxide• N 2 O• Nitrogen• N 2• Ammonia• NH 4+ (NH 3 )• Organic-N• Suspended solidsPHOSPHORUS• Orthophosphate• H 2 PO 4- , HPO 4-2• Organic-P• Suspended solids• PO 4 adsorbs stronglyto carbonates,hydrous metal oxides
What could be going on with N and P?• Diurnal changes in rate of uptake by biota• Diurnal changes in delivery rate from hyporheicor benthic zones• Diurnal redox cycles• Nitrification (ammonia + O 2 → nitrate)• Denitrification (nitrate + org. C → N 2 )• Anammox (ammonia + nitrate → N 2 )• Sorption/desorption of P onto carbonates, HFO,etc..• Others…?
Page 1: Diel cycling of nutrientsChris Gamm
Page 5 and 6: 15Nutrient cycling in Silver Bow Cr
Page 7 and 8: Dissolved Oxygen (mg/L)• Faster r
Page 9 and 10: temperatureContinuousdatacollectedu
Page 11 and 12: Conclusions of Scholefield et al.:
Page 13 and 14: P, As Concentration (ppb)pHP, As, a
Page 15 and 16: Summary (emerging pattern…)• Ni
Page 17 and 18: Previous studies: DOC cycling• Ka
Page 19: Sources of data: DOC• Dawson JJC,

Diel cycling of nutrients

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