Reconciling measured and predicted fluxes of oxygen across the deep sea sediment‐water interface1

Reimers, Clare E.; Smith, Kenneth L.

doi:10.4319/lo.1986.31.2.0305

Cited by 93 publications

(42 citation statements)

References 29 publications

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“…Only the upper few centimeters of sediment at Sta. C appear oxygenated (Reimers and Smith 1986). Below this depth anaerobic respiration reactions prevail that use electron acceptors such as N0,3-, MnO,, Fe,O, and SO42 -in the oxidation of organic matter (Froelich et al 1979).…”

Section: Discussionmentioning

confidence: 99%

“…Bacterial utilization rates of DOC at 5,5 50 m in the central North Pacific have been estimated to be 0.3 pg C m-3 d-l from simulated in situ growth rates (Carlucci and Williams 1978), which is <7 x 10m5 % of the estimated standing stock of DOC in these water (Williams et al 1980). In situ utilization rates of one component of DOC, glutamic acid, by bacterioplankton in the benthic boundary layer in the eutrophic Panama Basin (3,800-3,850 m) and extrapolated to total carlbon utilization ranged from 17.4 to 174.8 pg C m-3 d-l (Smith et al 1986). On the basis of these estimates, the bacterioplankton in the Panama Basin could utilize up to 0.04% of the available DOC per day.…”

Section: Discussionmentioning

confidence: 99%

“…Below this depth anaerobic respiration reactions prevail that use electron acceptors such as N0,3-, MnO,, Fe,O, and SO42 -in the oxidation of organic matter (Froelich et al 1979). However, in the deep sea, it is estimated that > 90% of the organic matter is aerobically oxidized (Bender and Heggie 1984) and this occurs rapidly (d) within the upper few millimeters of the sediment (Reimers and Smith 1986).…”

Section: Discussionmentioning

confidence: 99%

“…The abundance (Wishner 1980a), biomass (Wishner 1980b), and metabolic (Smith 1982;Smith et al 1986) and feeding activity (Wishner and MeiseMunns 1984) of plankton increase within the benthic boundary layer near the deep sea sediment-water interface. The number of scavenging amphipods caught in baited traps also increases near the bottom at the four western stations (Smith and Baldwin 1984b;Ingram and Hessler 1983).…”

Section: Discussionmentioning

confidence: 99%

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Food energy supply and demand: A discrepancy between particulate organic carbon flux and sediment community oxygen consumption in the deep ocean1

Smith¹

1987

Limnology & Oceanography

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184

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Sediment community oxygen consumption (SCOC) and particulate organic carbon (POC) flux to the benthic boundary layer were concurrently measured at five deep-sea stations on a transect across the eastern and central North Pacific at various times of year. A free vehicle grab respirometer and Alvin-manipulated grab respirometer were used to measure SCOC. Paired particle interceptor traps (PITS) were used to collect sedimenting small POC at 100 and 600 m above the bottom. SCOC decreased across the transect from the eutrophic coastal areas off southern California to the oligotrophic central Pacific gyre. These rates were generally highest in June and lowest between fall and early spring across the transect with a recurrent pattern in the magnitude of rates measured during the same months but different years. Flux of POC into the benthic boundary layer decreased across the transect from the eutrophic eastern to the oligotrophic central Pacific. No consistent temporal trends were evident in POC flux across the transect, possibly because of small sample sizes, high intra-station variability, and short-term deployments (57 d). Comparison of concurrently measured supply of POC with organic carbon demand of the sediment community as estimated from SCOC reveals a supply deficit across the transect for all seasons measured. For one nearly synoptic sampling period across the transect in June 1982, the supply-to-demand ratio is lowest at the two nearshore stations where current speeds are highest. A predictive equation for SCOC with a least-squares regression analysis and log-transformed data revealed that POC flux as the independent variable accounted for only 59% of the variability in SCOC. Direct coupling between SCOC and POC flux is not confirmed by these results, which may be attributed to the limitations of the measurements or other organic carbon sources.Sediment community oxygen consumption (SCOC) has been measured at various times of year at five deep sea stations on a transect across the eastern and central North Pacific (CNP-ENP transect) over the past 8 yr. Initial results indicated spatial variability in SCOC which increased along a gradient of increasing surface water primary productivity from the oligotrophic central gyre to the more eutrophic coastal upwelling areas off southern California . Temporal variability was also identified in SCOC at two of the transect stations and appeared related to the seasonal productivity of the overlying water (Smith and Baldwin 1984a). This result is not surprising given recent reports of seasonal fluctuations in the fluxes of small organic particles to abyssal depths (Deuser and Ross 1980; l This research was supported by NSF grants OCE 81-17661, OCE 84-09075, and OCE 84-17913 and a contract from Sandia Laboratories. Deuser et al. 198 1;Honjo 1982;Billett et al. 1983;Cole et al. 1985)-a source of food supply for deep sea benthos. The next logical step is to explore the possible coupling between this food supply from the overlying water column and the food demand of...

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Food energy supply and demand: A discrepancy between particulate organic carbon flux and sediment community oxygen consumption in the deep ocean1

Smith¹

1987

Limnology & Oceanography

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184

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“…但 DBL 层不会受到沉积物中的孔隙度和曲折度的影响. 沉积物中存在垂向孔隙度差异, 从而有可能造成 DOE s 计算结果的误差 [5,30] . 此外, 通过沉积物中的氧气微剖面进行 DOE s 计算时, 零阶拟合过于简单, 从而有可能过高估算 DOE s 的值.…”

Section: 本研究根据水流开启-停止过程中unclassified

Spatial heterogeneity of oxygen exchange between sediment-water interface in lakes

Wang¹,

Shen²,

Zhang³

et al. 2009

Journal of Lake Sciences

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Volumetric oxygen exchange rate (O 2 (t)), based on measurement by a flow-on/flow-off controlling method, is significantly correlated with TOE (total oxygen exchange) obtained from laboratory-incubated sediment cores. The difference between TOE and DOE (diffusive oxygen exchange in diffusive boundary layers) suggested that there is a fauna-mediated O 2 consumption in the two factors. Comparison of DOE with DOE s (diffusive oxygen exchange in sediments) from one-dimensional oxygen concentration profiles at a steady stationary condition, O 2 (t) as well as TOE, is an integrated measurement for the diffusion, advection and fauna-mediated O 2 consumption. Furthermore, a comparative study of TOE values among sediments from Lake Taihu and Lake Nansihu revealed that the difference from the sites was due to the variation of organic matter concentration in the surface sediments, additionally effects of benthic faunas.

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In situ voltammetric measurements in natural waters: Future prospects and challenges

1993

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The state of the art and challenges in developing in situ voltammetric probes for direct measurements in natural waters are presented. Articles dealing with this topic are reviewed. Use of voltammetric probes in the laboratory and in the field is outlined. An up-to-date account of the results reported in the literature on the development of existing in situ voltammetric systems for such measurements is given. Emphasis is placed on the need for such systems to gain a better understanding of the mechanisms of processes occurring in natural aquatic systems. Suggestions are made for future development.

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Reconciling measured and predicted fluxes of oxygen across the deep sea sediment‐water interface1

Cited by 93 publications

References 29 publications

Food energy supply and demand: A discrepancy between particulate organic carbon flux and sediment community oxygen consumption in the deep ocean1

Food energy supply and demand: A discrepancy between particulate organic carbon flux and sediment community oxygen consumption in the deep ocean1

Spatial heterogeneity of oxygen exchange between sediment-water interface in lakes

In situ voltammetric measurements in natural waters: Future prospects and challenges

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