Effects of Deposit-Feeder Activity on Bacterial Production and Abundance in Profundal Lake Sediment

Bund, Wouter van de; Goedkoop, Willem; Johnson, Richard K.

doi:10.2307/1467849

Cited by 81 publications

(36 citation statements)

References 24 publications

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“…A possible explanation for this delayed incorporation of diatom C may be preferential ingestion of detritus over intact diatom ccl Is. For example, van de Bund et al (1994) showed in culture experiments that Chydorus piger Sars grew exponentially with detritus as a food source, whereas the presence of diatoms as an additional food resource did not result in an increased population growth rate. Furthermore, van de Bund et al (1994) found that no reproduction occurred when chydorids were fed diatoms only.…”

Section: Discussionmentioning

confidence: 99%

“…For example, van de Bund et al (1994) showed in culture experiments that Chydorus piger Sars grew exponentially with detritus as a food source, whereas the presence of diatoms as an additional food resource did not result in an increased population growth rate. Furthermore, van de Bund et al (1994) found that no reproduction occurred when chydorids were fed diatoms only. Therefore, the increased assimilation rate for Chydorus between days 8 and 16 may indicate that added diatoms became more available due to the conditioning of this food resource by meiofauna and microheterotrophs.…”

Section: Discussionmentioning

confidence: 99%

“…The fate of material entering detrital pathways is also affected directly by several physical, chemical and biological processes (e.g. Andersen and Kristensen 1992;van Duyl et al 1992;van de Bund et al 1994).…”

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confidence: 99%

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The fate of diatom carbon within a freshwater benthic community-a microcosm study

1997

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Partitioning of 14C from labeled diatoms (Stephanodiscus hantzschii Grun v. pusillus) within a freshwater benthic community was determined in a microcosm study for three different treatments: sediment with only natural, ambient meio-and microfauna, and microbes, addition of 30 Chydorus sphaericus Mtiller per microcosm, and addition of four Chironomus riparius Meigen larvae per microcosm. Assimilation of '"C label in Chironomus, Chydorus, ambient meiofauna, respired 14C, and [14C]DOC in both overlying and interstitial waters was measured, and [14C]POC was calculated. The carbon budget clearly showed a rapid assimilation of diatom C by surface deposit-feeding Chironomus larvae, more than 20% of the total added label was useId after 8 d. Community respiration in the Chironomus treatment increased from 6% on day 2 to 18% on day 8, or 92% higher than that of the treatments with ambient meiofauna only and added Chydorus. Chironomus respiration was low relative to assimilation, indicating that larvae efficiently used the easily accessible and digestible food resource. Sediment microheterotrophs (microbes and microfauna) were also found to be important quantitatively for C turnover. Respiration by microheterotrophs was -10% of the total added label after 8 d.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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The fate of diatom carbon within a freshwater benthic community-a microcosm study

1997

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“…Similarly, the results of laboratory microcosm studies using 14 C-labelled phytodetritus show that up to 87% of the added phytodetritus remains in the sediment as particulate organic matter even after several weeks or even months incubation (Andersen & Kristensen 1992, Kristensen et al 1995, Andersen 1996, Gullberg et al 1997. It has been hypothesised that degradation is slowed down by the burial of sedimented organic matter by the activity of benthic animals (van Duyl et al 1992, van de Bund et al 1994, Blair et al 1996, Gullberg et al 1997 or by temporary hypoxia following sedimentation events (Heiskanen & Leppänen 1995, Kristensen et al 1995, Andersen 1996. In contrast, a laboratory study of the loss of phytoplankton pigments from a simulated sedimentation of Baltic spring bloom material found that the presence of the amphipod Monoporeia affinis speeded up degradation (Bianchi et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Effects of the coexisting Baltic amphipods Monoporeia affinis and Pontoporeia femorata on the fate of a simulated spring diatom bloom

Bund

Ólafsson²,

Modig³

et al. 2001

Mar. Ecol. Prog. Ser.

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A laboratory experiment was performed to quantify the fate of diatom phytodetritus and how this is affected by the presence of benthic amphipods. A Baltic Sea spring bloom sedimentation event was simulated by adding 14 C-labeled diatoms (Skeletonema costatum) to microcosms with varying densities of the amphipods Monoporeia affinis and Pontoporeia femorata, as well as to microcosms without amphipods, where the sediment was disturbed mechanically. After 1 mo of incubation, 51 to 77% of the added diatom carbon was still in the sediment; 2 mo later 49 to 66% remained. The effect of amphipods on the fate of the phytodetritus differed between species. At near-field density, M. affinis incorporated 6 to 11% of the added 14 C, P. femorata only 1.2%. The results indicate that burrowing slows mineralization, presumably by mixing organic material to anoxic depths in the sediment. The effect of P. femorata on mineralization could not be distinguished from the effect of mechanical stirring. M. affinis feeding and respiration resulted in a significant increase in mineralization; at low densities this compensated for the mixing effect, at high densities M. affinis feeding resulted in enhanced net mineralization.

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“…Tubificids ingest buried sediments few centimetres in depth and faeces are deposited on the surface. Tubificid worms, through their burrowing, feeding and respiration movements, have been described to enhance not only nutrients and organic matter release from sediments (Fukuhara and Sakamoto, 1987;Mermillod-Blondin et al, 2005) but also the bacterial activity (Banta et al, 1999;Heilskov and Holmer, 2001;Mermillod-Blondin et al, 2005;Navel et al, 2011;Van de Bund et al, 1994) and oxygen consumption (Lagauzère et al, 2009;Mermillod-Blondin et al, 2005). Overall, bioturbation of bottom sediments at the sediment-water interface is currently gaining more attention in studies dealing with the functioning of aquatic ecosystems (Adámek and Maršálek, 2013).…”

Section: Introductionmentioning

confidence: 99%

Influence of tubificid worms on nutrient fluxes across water-sediment interface in fish farm settling ponds

Puigagut

Chazarenc

Comeau

2014

Knowl. Managt. Aquatic Ecosyst.

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Effects of Deposit-Feeder Activity on Bacterial Production and Abundance in Profundal Lake Sediment

Cited by 81 publications

References 24 publications

The fate of diatom carbon within a freshwater benthic community-a microcosm study

The fate of diatom carbon within a freshwater benthic community-a microcosm study

Effects of the coexisting Baltic amphipods Monoporeia affinis and Pontoporeia femorata on the fate of a simulated spring diatom bloom

Influence of tubificid worms on nutrient fluxes across water-sediment interface in fish farm settling ponds

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