Evidence that hyporheic zones increase heterotrophic metabolism and phosphorus uptake in forest streams

Mulholland, Patrick J.; Marzolf, Erich R.; Webster, Jackson R.; Hart, Deborah R.; Hendricks, Susan P

doi:10.4319/lo.1999.44.1.0230

Cited by 44 publications

(73 citation statements)

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“…Hall et al (2002) also addressed the effect of surface water pools on TS estimates (in contrast to true hyporheic exchange); our results showed a similar effect where leaf litter reduced hyporheic exchange, but also created some local pooling of water (based on visual observations). Other studies relating TS and nutrient uptake have been equivocal (Hall et al 2002;Roberts et al 2007), showing negative , neutral (Martí et al 1997;Butturini and Sabater 1999;Simon et al 2005) and positive effects (Valett et al 1996;Mulholland et al 1997;Argerich et al 2008). Our results suggest that the effect of TS on NH 4…”

Section: How Important Was Ts On Ammonium Uptake?supporting

confidence: 68%

Longitudinal and seasonal variation of stream N uptake in an urbanizing watershed: effect of organic matter, stream size, transient storage and debris dams

et al. 2009

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? uptake rate patterns had a distinct seasonal reversal; fall had the highest uptake rates in the upper reaches, while summer had the highest uptake rates in the lower reaches. This seasonal reversal was attributed to organic matter and evidenced by DON patterns. Transient storage did not have an expected effect on uptake rates in fall because it was confounded by leaf litter; litter produced higher uptakes, but also may have reduced transient storage. In summer however, uptake rates had a positive correlation with transient storage. Debris dams had no distinct effect on uptake in fall because of their recent formation. In summer however, the debris dam effect was significant; although the debris dams were hydraulically inactive then, the upstream reaches had 2-5 fold higher uptake rates. The seasonal and longitudinal differences in NH 4? uptake reflect interactions between flow conditions and the role of organic matter. Urbanization can alter both of these characteristics, hence affect stream N processing.

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Section: How Important Was Ts On Ammonium Uptake?supporting

confidence: 68%

Longitudinal and seasonal variation of stream N uptake in an urbanizing watershed: effect of organic matter, stream size, transient storage and debris dams

et al. 2009

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“…Meyer and Edwards (1990) attributed downstream increases in R to heterotrophic activity supported by high allochthonous C input from riparian swamps in a blackwater stream system in Georgia. R in Hugh White Creek (Mulholland et al 1997 as corrected by Mulholland et al 1999), a headwater tributary of the LTR at Coweeta Hydrologic Laboratory, greatly exceeded LTR estimates. If we include this headwater stream as part of our continuum, then R appears to decrease downstream through 6th order.…”

Section: Longitudinal Trends In Metabolismmentioning

confidence: 99%

“…Researchers have attributed similar discrepancies between C supply and R to floodplain organic matter inputs (Meyer and Edwards 1990), import from upstream reaches (Young and Huryn 1996), and dissolved organic C (DOC; Meyer 1987, Cole andCaraco 2001). The C deficit of Hugh White Creek was 787.3 g C m Ϫ2 y Ϫ1 based on values derived from other studies (DOC: Meyer and Tate 1983;litter fall and transport: Webster et al 1990;FPOM: Golladay 1997;GPP and R: Mulholland et al 1997 as corrected by Mulholland et al 1999). Although several additional sources of C were estimated for Hugh White Creek, its annual C deficit was over twice the observed LTR deficit.…”

mentioning

confidence: 99%

Longitudinal patterns of metabolism in a southern Appalachian river

McTammany

Webster

Benfield

et al. 2003

Journal of the North American Benthological Society

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Abstract. We investigated longitudinal patterns of ecosystem metabolism (primary production and respiration) at 4 sites along a 37-km segment of the Little Tennessee River (LTR), North Carolina. These sites corresponded to 4th-to 6th-order reaches in the LTR in an attempt to identify the transition from heterotrophic to autotrophic conditions in this river ecosystem. In addition, we compared autochthonous C production to supply of coarse organic material from direct litter fall and entrainment from the floodplain during floods to determine the contributions of each to river energetics on an annual basis. Metabolism was measured at several times of year at each site using the singlestation diel oxygen change method and reaeration estimated by the energy dissipation method. Gross primary production (GPP) ranged from 0.07 to 1.92 g C m Ϫ2 d Ϫ1 and increased ϳ3-fold from upstream to downstream. Respiration (R) ranged from 0.27 to 2.32 g C m Ϫ2 d Ϫ1 but did not change along the river continuum. Net ecosystem production (NEP) and P/R consistently showed that metabolism was heterotrophic in upstream sites and became autotrophic in the site furthest downstream. Calculated transitional P/R (i.e., where heterotrophic respiration is supported equally by autochthonous and allochthonous C sources) suggested that this heterotrophy-autotrophy shift occurred further upstream than where P/R ϭ 1. Annual rates of GPP were 3 times higher than litter fall and floodplain inputs of C, but R was higher than total C input suggesting that unmeasured C sources must be important for C dynamics in the LTR. The difference between measured C inputs and R decreased along the river continuum because of a 3-fold increase in GPP with little change in allochthonous input and R. Our results suggest that the LTR changes from heterotrophic to autotrophic along this stretch of river and that autochthonous C sources become more important for respiration and secondary production at downstream sites.

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“…High microbial activity in the hyporheic zone affects nitrogen cycling by stimulating nitrification and denitrification reactions [Triska et al, 1993]. Other important chemical reactions also appear to be enhanced in the hyporheic zone, including sorption of dissolved metals to sediments [Bencala et al, 1984;Cerling et al, 1990], uptake of phosphorus [Mulholland et al, 1997], oxidation of dissolved metals to form metal precipitate coatings on sediment [Kimball et al, 1994; Benner et al, 1995], and biodegradation of organic contaminants such as toluene [Heekyung et al, 1995].…”

Section: Role Of Hyporheic Zone In Reactive Solute Transportmentioning

confidence: 99%

Effect of enhanced manganese oxidation in the hyporheic zone on basin‐scale geochemical mass balance

Harvey¹,

Fuller²

1998

Water Resources Research

262

279

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Abstract. We determined the role of the hyporheic zone (the subsurface zone where stream water and shallow groundwater mix) in enhancing microbially mediated oxidation of dissolved manganese (to form manganese precipitates) in a drainage basin contaminated by copper mining. The fate of manganese is of overall importance to water quality in Pinal Creek Basin, Arizona, because manganese reactions affect the transport of trace metals. The basin-scale role of the hyporheic zone is difficult to quantify because stream-tracer studies do not always reliably characterize the cumulative effects of the hyporheic zone. This study determined cumulative effects of hyporheic reactions in Pinal Creek basin by characterizing manganese uptake at several spatial scales (stream-reach scale, hyporheicflow-path scale, and sediment-grain scale). At the stream-reach scale a one-dimensional stream-transport model (including storage zones to represent hyporheic flow paths) was used to determine a reach-averaged time constant for manganese uptake in hyporheic zones, 1/As, of 1.3 hours, which was somewhat faster but still similar to manganese uptake time constants that were measured directly in centimeter-scale hyporheic flow paths (1/X h '-2.6 hours), and in laboratory batch experiments using streambed sediment (1/X = 2.

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Evidence that hyporheic zones increase heterotrophic metabolism and phosphorus uptake in forest streams

Cited by 44 publications

References 0 publications

Longitudinal and seasonal variation of stream N uptake in an urbanizing watershed: effect of organic matter, stream size, transient storage and debris dams

Longitudinal and seasonal variation of stream N uptake in an urbanizing watershed: effect of organic matter, stream size, transient storage and debris dams

Longitudinal patterns of metabolism in a southern Appalachian river

Effect of enhanced manganese oxidation in the hyporheic zone on basin‐scale geochemical mass balance

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