Water column oxygen demand and sediment oxygen flux: patterns of oxygen depletion in tidal creeks

MacPherson, Tara A.; Cahoon, Lawrence B.; Mallin, Michael A.

doi:10.1007/s10750-007-0643-4

Cited by 44 publications

(24 citation statements)

References 27 publications

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“…Hypoxia in these creeks is influenced by sediment oxygen demand (SOD), as well as by BOD. In a comparison of these processes MacPherson (2003) found that BOD played the dominant role in summer and spring, while SOD dominated oxygen demand in winter and fall, with SOD exerting a greater overall annual effect on oxygen demand in these creeks. The correlation between BOD5 and water temperature appears to be a result of the very low winter chlorophyll a levels in the tidal creeks (Mallin et al 2004b).…”

Section: Discussionmentioning

confidence: 97%

“…It is infrequently measured because of inherent difficulties with in situ techniques, and methods vary considerably among researchers. However, on an annual basis SOD can exert an overall greater effect on stream DO concentrations than BOD in some situations (MacPherson 2003). In black water systems especially, the high natural bacteria concentrations within the sediments can significantly influence stream heterotrophy (Meyer 1990;Fuss and Smock 1996).…”

Section: Discussionmentioning

confidence: 99%

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Factors contributing to hypoxia in rivers, lakes, and streams

Mallin

Johnson

Ensign

et al. 2006

Limnology & Oceanography

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162

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We investigated physical, chemical, and biological variables contributing to biochemical oxygen demand (BOD) in 17 North Carolina lotic and lentic water bodies affected by mild to severe hypoxia. Phytoplankton production created the dominant reservoir of labile carbon driving BOD, and subsequent hypoxia, in a Piedmont river subject to algal blooms, three urban streams, a set of anthropogenically affected tidal creeks, and two urban lakes. Autotrophic phytoplankton production contributed to the BOD load in some rural streams. Autochthonous heterotrophic processes, stimulated primarily by phosphorus and secondarily by nitrogen loading, were the major influences on BOD in two large black water rivers and some rural black water streams. Inputs of biochemical oxygen-demanding materials from storm water runoff contribute to BOD in some urban and rural streams and black water rivers. We suggest that reductions of hypoxia can be better achieved by a system-specific approach based on an array of factors that potentially influence BOD, including both autochthonous and allochthonous variables. In some circumstances targeting the nutrient(s) stimulating phytoplankton blooms will suffice to reduce hypoxia, but in other situations targeting nutrient(s) limiting bacterial production will be necessary. Reduction of non-point source inputs of biochemical oxygen-demanding materials derived from urbanization or other land disrupting activities will be critical in some cases.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Factors contributing to hypoxia in rivers, lakes, and streams

Mallin

Johnson

Ensign

et al. 2006

Limnology & Oceanography

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162

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“…In this case, vertical mixing of the water column is typically induced by winds and/or tidal turbulence, and hypoxia results from a sink-source imbalance where community respiration exceeds the rate of O 2 replenishment via air-water exchange. In contrast, when shallow, clearwater coastal systems (e.g., lagoons) receive substantial inputs of inorganic nutrients, photosynthetic production (often dominated by benthic plants) represents an important O 2 source, leading to diel-scale cycling between supersaturated O 2 concentrations during the day and hypoxic conditions at night (e.g., MacPherson et al, 2007;Tyler et al, 2009). Although diel hypoxia is generally confined to the warmer summer months, its occurrence and intensity tends to vary on daily-to-weekly time-scales associated with periodic fluctuations in sunlight and tides, as well as rain and wind events (e.g., Shen et al, 2008).…”

Section: Factors Driving Physical and Ecological Processesmentioning

confidence: 99%

Temporal responses of coastal hypoxia to nutrient loading and physical controls

et al. 2009

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Abstract. The incidence and intensity of hypoxic waters in coastal aquatic ecosystems has been expanding in recent decades coincident with eutrophication of the coastal zone. Worldwide, there is strong interest in reducing the size and duration of hypoxia in coastal waters, because hypoxia causes negative effects for many organisms and ecosystem processes. Although strategies to reduce hypoxia by decreasing nutrient loading are predicated on the assumption that this action would reverse eutrophication, recent analyses of historical data from European and North American coastal systems suggest little evidence for simple linear response trajectories. We review published parallel time-series data on hypoxia and loading rates for inorganic nutrients and labile organic matter to analyze trajectories of oxygen (O 2 ) response to nutrient loading. We also assess existing knowledge of physical and ecological factors regulating O 2 in coastal marine waters to facilitate analysis of hypoxia responses to reductions in nutrient (and/or organic matter) inputs. Of the 24 systems identified where concurrent time series of loading and O 2 were available, half displayed relatively clear and direct recoveries following remediation. We explored in detail 5 well-studied systems that have exhibited complex, non-linear responses to variations in loading, including apparent "regime shifts". A summary of these analyses suggests that O 2 conditions improved rapidly and linearly in systems where remediation focused on organic inputs from sewage treatment plants, which were the primary drivers of hypoxia. In larger more open systems where diffuse nutrient loads are more important in fueling O 2 depletion and where Correspondence to: W. M. Kemp (kemp@umces.edu) climatic influences are pronounced, responses to remediation tended to follow non-linear trends that may include hysteresis and time-lags. Improved understanding of hypoxia remediation requires that future studies use comparative approaches and consider multiple regulating factors. These analyses should consider: (1) the dominant temporal scales of the hypoxia, (2) the relative contributions of inorganic and organic nutrients, (3) the influence of shifts in climatic and oceanographic processes, and (4) the roles of feedback interactions whereby O 2 -sensitive biogeochemistry, trophic interactions, and habitat conditions influence the nutrient and algal dynamics that regulate O 2 levels.

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“…Oxygen is consumed when algae respires in the night and it is produced during photosynthesis in the day. Studies by authors [5,6] indicated that oxygen demand by sediments was the major source of water column oxygen depletion. Benthic deposits usually originate from surface runoff, wastewater effluents, and aquatic conditions [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Studies by authors [5,6] indicated that oxygen demand by sediments was the major source of water column oxygen depletion. Benthic deposits usually originate from surface runoff, wastewater effluents, and aquatic conditions [7][8][9]. Once at the receiving surface water, the deposits are transported from these allochthonous materials through the water column to the river bed.…”

Section: Introductionmentioning

confidence: 99%

Seasonal Variation in Sediment Oxygen Demand in a Northern Chained River-Lake System

Akomeah

2017

Water

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Sediment oxygen demand (SOD) contributes immensely to hypolimnetic oxygen depletion. SOD rates thus play a key role in aquatic ecosystems' health predictions. These rates, however, can be very expensive to sample. Moreover, determination of SOD rates by sediment diagenesis modeling may require very large datasets, or may not be easily adapted to complex aquatic systems. Water quality modeling for northern aquatic systems is emerging and little is known about the seasonal trends of SOD rates for complex aquatic systems. In this study, the seasonal trend of SOD rates for a northern chained river-lake system has been assessed through the calibration of a water quality model. Model calibration and validation showed good agreement with field measurements. Results of the study show that, in the riverine section, SOD 20 rates decreased from 1.9 to 0.79 g/m 2 /day as urban effluent traveled along the river while a SOD 20 rate of 2.2 g/m 2 /day was observed in the lakes. Seasonally, the SOD 20 rates in summer were three times higher than those in winter for both river and lakes. The results of the study provide insights to the seasonal trend of SOD rates especially for northern rivers and lakes and can, thus, be useful for more complex water quality modeling studies in the region.

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Water column oxygen demand and sediment oxygen flux: patterns of oxygen depletion in tidal creeks

Cited by 44 publications

References 27 publications

Factors contributing to hypoxia in rivers, lakes, and streams

Factors contributing to hypoxia in rivers, lakes, and streams

Temporal responses of coastal hypoxia to nutrient loading and physical controls

Seasonal Variation in Sediment Oxygen Demand in a Northern Chained River-Lake System

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