Biological Redistribution of Lake Sediments by Tubificid Oligochaetes: Branchiura sowerbyi and Limnodrilus hoffmeisteri/Tubifex tubifex

Matisoff, Gerald; Wang, Xiaosong; McCall, Peter L.

doi:10.1016/s0380-1330(99)70729-x

Cited by 61 publications

(33 citation statements)

References 15 publications

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“…Also other studies have shown selective feeding by oligochaetes on the organic component (living or non-living) of the sediment (Brinkhurst & Chua, 1969;Wavre & Brinkhurst, 1971;Brinkhurst et al, 1972;Brinkhurst & Austin, 1979;Matisoff et al, 1999). Branchiura sowerbyi was able to grow on activated sludge but only when this was mixed with sand or river mud .…”

Section: Organic Content Of Substratementioning

confidence: 90%

Sludge Reduction by Predatory Activity of Aquatic Oligochaetes in Wastewater Treatment Plants: Science or Fiction? A Review

Ratsak

Verkuijlen²

2006

Hydrobiologia

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Biological aerobic wastewater treatment plants (WWTPs) produce a lot of excess sludge. The costs for handling this residual product are increasing, so the search for alternative techniques to reduce the amount of sludge has to be continued. Activated sludge consists of inorganic and organic substances, bacteria, protozoa and metazoa. Due to incomplete biomass conversion, sludge consumption yields less oligochaete biomass. From a technological point of view, the application of aquatic oligochaetes to reduce the sludge production offers interesting perspectives. This paper aims to review the feasibility for the reduction of activated sludge in WWTPs by means of aquatic oligochaetes. Also the current techniques concerning sludge reduction are taken into account. Several of the WWTPs relevant parameters, which may influence predatory activity of aquatic oligochaetes, are discussed: particle size, organic content of substrate, bacteria preference, life cycle and population dynamics of aquatic oligochaetes, temperature, pH, oxygen and process conditions. From the literature it appeared that most research has been performed on laboratory scale. Only a few authors mention a significant reduction of the sludge production by 'sessile' species such as Lumbriculus. Vermicultures for the reduction of activated sludge are rather common in developing countries. Incidentally large annelid blooms have been noticed in WWTPs. It remains obscure which factors trigger the initiation of annelid blooms in WWTPs and which are of importance to maintain a stable annelid population in WWTPs. The influence of a considerable worm bloom on the waste sludge production is still under investigation.

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Section: Organic Content Of Substratementioning

confidence: 90%

Sludge Reduction by Predatory Activity of Aquatic Oligochaetes in Wastewater Treatment Plants: Science or Fiction? A Review

Ratsak

Verkuijlen²

2006

Hydrobiologia

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“…Aside from these indirect effects, animals directly interact with microbes by feeding on them, which has a profound impact on microbial metabolic activity and biomass (Johnson et al 1989, Van De Bund et al 1994. Ingestion and egestion of bacteria often takes place at different sites in the sediment and thereby further promotes the spatial redistribution of microbes (Matisoff et al 1999). …”

mentioning

confidence: 99%

Probing the microenvironment of freshwater sediment macrofauna: Implications of deposit‐feeding and bioirrigation for nitrogen cycling

Stief

Beer

2006

Limnology & Oceanography

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The effect of sediment-dwelling macrofauna on nitrifying bacteria was investigated by direct probing in their overlapping habitat, i.e., the upper few millimeters of freshwater sediments. Microsensors (O 2 , NH þ 4 , NO 2 3 , and diffusivity) were used at the sediment surface and inside animal burrows to record steady-state and dynamic distributions of reactants, respectively. Short-term changes of metabolic activity (actual and potential nitrification rates) and long-term changes of abundance (fluorescence in situ hybridization) of nitrifying bacteria were determined. The presence of insect larvae (Chironomus riparius) increased the availability of O 2 and NO 2 3 in the sediment pore water and inside animal burrows, suggesting promotion of nitrification and dissimilatory NO 2 3 reduction, particularly in the burrowing layer of C. riparius. At the sediment surface (i.e., in the feeding layer of C. riparius), however, nitrification was inhibited by low NH þ 4 availability and high macrofaunal grazing pressure. Consequently, both actual and potential nitrification rates decreased in the feeding layer. Inside burrows, no net nitrification was detected, despite high NH þ 4 availability and frequent O 2 injections by larval ventilation activity. Conversely, burrows were sites of NH þ 4 production and NO 2 3 consumption. Nevertheless, the abundance of nitrifying bacteria increased measurably in the burrowing layer after prolonged incubation, but only in sediments in which the larvae were able to construct and ventilate stable burrows.

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“…The positive effect for Tobrilidae in deeper layers is probably caused by bioturbation. Matisoff (1999) directly described the important role of Tubificidae for sediment redistribution in limnetic sediments. Small bacteria feeders like Monhysteridae were not enhanced in the deeper layers.…”

Section: Parametermentioning

confidence: 99%

Factors Influencing the Vertical Distribution of Nematodes in Sediments

Teiwes

Bergtold

Traunspurger

2007

Journal of Freshwater Ecology

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The effects of oxygenation of sediment and the presence of macrobenthic organisms (gammarids, tubificids, and chironomid larvae) on the vertical distribution and species segregation of nematodes were studied in laboratory microcosms with freshwater sediment. The abundance of nematodes was positively affected by oxygenation, particularly in the deep sediment layers. Small nematodes increased in the deeper layers of oxygenated treatment. Macrobenthic animals did not influence abundance or vertical distribution of nematodes but had an impact on nematode community structure. The families Tobrilidae and Monhysteridae dominated the community. In the control treatments the monhysterids were abundant, whereas the importance of tobrilids increased in the treatments with macrobenthic animals.

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Biological Redistribution of Lake Sediments by Tubificid Oligochaetes: Branchiura sowerbyi and Limnodrilus hoffmeisteri/Tubifex tubifex

Cited by 61 publications

References 15 publications

Sludge Reduction by Predatory Activity of Aquatic Oligochaetes in Wastewater Treatment Plants: Science or Fiction? A Review

Sludge Reduction by Predatory Activity of Aquatic Oligochaetes in Wastewater Treatment Plants: Science or Fiction? A Review

Probing the microenvironment of freshwater sediment macrofauna: Implications of deposit‐feeding and bioirrigation for nitrogen cycling

Factors Influencing the Vertical Distribution of Nematodes in Sediments

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