Scanning electron microscopy and epifluorescence investigation of bacterial colonization of marine sand sediments

Weise, Wieland; Rheinheimer, Gerhard

doi:10.1007/bf02015075

Cited by 109 publications

(56 citation statements)

References 7 publications

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“…Differences in the composition of the in situ bacterial community and the bacterial community used as a tracer may influence grazing rate estimates because of selection for specific size classes (Epstein & Shiaris 1992a, Hahn & Höfle 1999 and/or species (Pérez-Uz 1996). Perhaps more important is the consideration that bacteria in sediments are mostly associated with sediment and detrital particles (Weisse & Rheinheimer 1978). Several flagellate species show marked preferences for attached and aggregated bacteria (Caron 1987, Sibbald & Albright 1988, so FLB should therefore be prepared from natural assemblages of free and attached bacteria.…”

Section: Abstract: Bacterivory · Heterotrophic Flagellates · Grazingmentioning

confidence: 99%

Uncoupling of bacterial production and flagellate grazing in aquatic sediments: a case study from an intertidal flat

Hamels¹,

Muylaert²,

Casteleyn³

et al. 2001

Aquat. Microb. Ecol.

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Section: Abstract: Bacterivory · Heterotrophic Flagellates · Grazingmentioning

confidence: 99%

Uncoupling of bacterial production and flagellate grazing in aquatic sediments: a case study from an intertidal flat

Hamels¹,

Muylaert²,

Casteleyn³

et al. 2001

Aquat. Microb. Ecol.

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“…Factors influencing the distribution of microbes in sediments include sediment grain size and shape (Meadows & Anderson 1967, Weise & Rheinheimer 1978, Nickels et al 1981, Hoppe 1984, Mayer et al 1985, carbon content (Cammen 1982, DeFlaun & Mayer 1983, Yamamoto & Lopez 1985, fluid flux to the bed (Thistle et al 1984, Eckman 1985, sediment disturbance (Wainright 1987, Findlay et al 1990a) and animal-microbe interactions (Federle et al 1983, Aller & Yingst 1985, Dobbs & Guckert 1988, Reichardt 1988, Findlay et al 1990b. Of these, the first 3 are most likely to influence microbial colonization of freshly deposited, abiotic sediments.…”

Section: Microbial Colonization Of Sedimentsmentioning

confidence: 99%

“…Bacteria and microalgae concentrate in areas of low relief, i.e, surface fissures, crevices, cleavage ledges and concave abrasions (Meadows & Anderson 1967, Weise & Rheinheimer 1978, Nickels et al 1981, Hoppe 1984, Mayer et al 1985, and total microbial biomass tends to be higher on grains with more surface Irregularities. Smooth grains, while supporting fewer procaryotes and microalgae, tend to support larger popul a t i o n~ of microeucaryotic grazers (Nickels et al 1981) Microbial community structure Just as the amount of phospholipid phosphate can be related to the total microbial biomass present in a sample, the amount the individual phospholipid fatty acids can be related to the biomass of specific groups of microorganisms that contain the individual fatty aclds (for a current revlew see Vestal & White 1989; for a detalled discussion of the interpretation of PLFA profiles see Findlay & Dobbs in press).…”

Section: Microbial Colonization Ratesmentioning

confidence: 99%

Colonization of freshly deposited barite and silica sediments by marine microorganisms in a laboratory flume flow

Findlay¹,

Sl²

1992

Mar. Ecol. Prog. Ser.

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The biomass and structure of microbial communities colonizing barite freshly deposited onto natural marine mud was investigated in a laboratory flume. Modern biochemical methods based on the lipid content of microbial cells were used to quantify microbial colonization. The experiment involved the following 3 treatments: (1) fresh barite deposited onto the surface of a natural muddy sediment; (2) fresh silica (utilized as a colonization control) also deposited onto natural mud; and (3) the muddy sediment itself. The treatments were placed in an open-channel flow with 10 pm filtered sea water and sampled every other day for 16 d. The flow was set at a shear velocity (u.) of 0.30 cm S-', less than the critical U. to initiate sediment motion of these particles. After 48 h, the barite and silica treatments contained approximately 60 times less microbial biomass than the natural mud. Little change in microbial biomass was observed in the barite and silica treatments until 13 d of incubation when microbial blomass began to increase. The carbon content of the fresh barite and silica treatments was 60 to 570 times less than in the natural mud and this lower carbon content is the likely proximal cause of the lower microbial biornass. The structure of microbial communities was analyzed after 13 d of incubation. Despite the large difference in total biomass, microbial communities in the natural mud and barite treatments were similar in structure. In the silica treatment, however, community structure was highly variable and dissimilar to the natural mud community. The community in flowing sea water was more similar to communities in natural mud and barite than in silica. These results suggest that natural marine sediments receiving inputs of barite can be expected, given sufficient time, to develop microbial communities similar in structure and possibly biomass to those found in ambient sediments.

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“…If time in transport (to the particle pool of interest) is a significant fraction of the microbial population doubling time, microbial abundance could increase through reproduction on, or immigration to, the transporting particle. The concentrations of microbes in particle crevices and recesses (Meadows and Anderson 1968;Weise and Rheinheimer 1978;DeFlaun and Mayer 1983) suggest that particle collisions affect microbe distribution and abundance. Steele (1976) reported that the strong swash action at an exposed Indian beach removes much of the epipsammic production.…”

Section: Methods and Resultsmentioning

confidence: 99%

Effects of sediment transport on deposit feeding: Scaling arguments1

Miller

Jumars

Nowell

1984

Limnology & Oceanography

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At least five dimensionless variables are needed for dimensional analysis of an individual surfacedeposit feeder using particles containing microbial food both locally produced (by in situ growth) and advected (via sediment transport). From scaling arguments which provide the relationships among these variables, it is apparent that food availability is determined primarily by the ratios of geophysical sediment transport rate into the particle pool from which the animal feeds to its ingestion rate, and of particle residence time in the feeding pool to the microbial doubling time, Increasing sediment transport can either increase or decrease local food availability. Transport patterns beneath waves have dramatic effects: wave mixing makes available to the animal particles which otherwise would be literally out of reach. Specialization on advected particles and reliance on microbial gardening are favored under different environmental conditions, specified in terms of dimensionless ratios. The scaling model also places previous models of deposit feeding in an environmental context. It contrasts with an alternative, nutrient spiraling approach in having a basis in natural selection for its optimization arguments.

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Scanning electron microscopy and epifluorescence investigation of bacterial colonization of marine sand sediments

Cited by 109 publications

References 7 publications

Uncoupling of bacterial production and flagellate grazing in aquatic sediments: a case study from an intertidal flat

Uncoupling of bacterial production and flagellate grazing in aquatic sediments: a case study from an intertidal flat

Colonization of freshly deposited barite and silica sediments by marine microorganisms in a laboratory flume flow

Effects of sediment transport on deposit feeding: Scaling arguments1

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