The impact of organic matter and macrozoobenthos on bacterial and oxygen variables in marine sediment boxcosms

Duyl, Fleur C. van; Kop, Arjen J.; Kok, A.; Sandee, A.J.J.

doi:10.1016/0077-7579(92)90074-o

Cited by 65 publications

(31 citation statements)

References 34 publications

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“…Other studies, performed in oligotrophic marine environments, have also shown that sediment bacteria can respond to organic inputs even at low temperatures (Graf et al 1982;Van Duyl et al 1990). The magnitude of this response will probably be a function of the trophic status of the sediment (i.e.…”

Section: Discussionmentioning

confidence: 99%

Pelagic‐benthic coupling: Profundal benthic community response to spring diatom deposition in mesotrophic Lake Erken

Goedkoop

Johnson

1996

Limnology & Oceanography

109

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Phytodetrital sedimentation, bacterial activity in sediments, and benthic macro-and meiofauna abundance were measured to calculate a carbon budget for pelagic-benthic coupling in Lake Erken. Bacterial activity in surficial sediment was limited by temperature in spring, although a significant correlation with the input of spring-bloom phytodetritus was noted. Population dynamics of benthic meiofauna during a period of increased food availability in spring were highly taxon-specific and closely correlated to feeding behavior. Abundances of ostracods and nematodes rapidly increased when phytodetritus became available in hypolimnetic water and surficial sediment, respectively. Considerable time lags (months) were found between phytodetritus deposition and population development of harpacticoid copepods and chydorids.Carbon budget calculations based on sedimentation data (traps) and surficial sediment C content showed that during spring between 1.1 and 7.2% of deposited phytodetritus is assimilated by benthic meiofauna, whereas the dominant macroinvertebrates, sedentary chironomids, assimilated between 2.4 and 6.0%. On average, between 1.9 and 12.4% of the deposited phytodetritus was mineralized by sediment bacteria. A significant negative correlation was found between abundances of benthic meiofauna and bacteria in the sediment. Chlorophyll a analysis of surficial sediment was a necessary, complementary tool to detect sedimentation that was not detected by the traditional, cylindric sediment traps.

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Section: Discussionmentioning

confidence: 99%

Pelagic‐benthic coupling: Profundal benthic community response to spring diatom deposition in mesotrophic Lake Erken

Goedkoop

Johnson

1996

Limnology & Oceanography

109

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“…Furthermore, mixing and homogenization of sediment clearly destroys the natural chemical, physical and biological structure of sediments (Kristensen & Blackburn 1987, van Duyl et al 1992. Although the 2 locations used in this study were chosen for their similarities, they were evidently 2 different sediments with different biogeochemical activities, solid particulate sulfur and reactive iron pools.…”

Section: Discussionmentioning

confidence: 99%

Impact of Arenicola marina (Polychaeta) on sediment sulfur dynamics

Nielsen

Kristensen²,

Holmer³

2003

Aquat. Microb. Ecol.

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Sulfate reduction rates and various parameters related to the sulfur cycling were investigated in situ and experimentally by a mm approach in sediment surrounding burrows of the polychaete Arenicola marina. Sulfate reduction rates were immediately affected in a 5 to 15 mmthick zone surrounding the tail shaft. Rates were depressed by 52% in the burrow wall and increased with distance towards ambient rates. Experimental use of artificially ventilated burrows showed that the reduction was mediated by introduction of oxygenated surface water by irrigation, which suppressed possible stimulating effect of increase in organic carbon availability from mucus secretion by the worm. Furthermore, irrigation and sediment reworking by A. marina increased the content of biological reactive Fe(III) in the feeding funnel and in a narrow zone around the tail shaft, creating environments suitable for dissimilative Fe(III) reduction. Total reduced sulfide pools showed that reoxidation of reduced sulfide species occurred along the burrow and in the feeding funnel of A. marina. Reoxidation in the tail shaft region was mediated by irrigation, while the reduction in the feeding funnel probably occurred due to the combined effect of irrigation and sediment reworking. In general, A. marina has a great impact on sediment sulfur biogeochemistry, suggesting that bioturbation depresses sulfate reduction and increases the importance of Fe(III) as an electron acceptor in carbon oxidation. It is also indicated that A. marina reduces permanent burial of reduced sulfide and lowers the steady-state level of total reduced sulfide in the sediment.

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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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The impact of organic matter and macrozoobenthos on bacterial and oxygen variables in marine sediment boxcosms

Cited by 65 publications

References 34 publications

Pelagic‐benthic coupling: Profundal benthic community response to spring diatom deposition in mesotrophic Lake Erken

Pelagic‐benthic coupling: Profundal benthic community response to spring diatom deposition in mesotrophic Lake Erken

Impact of Arenicola marina (Polychaeta) on sediment sulfur dynamics

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

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