Short-Term Variations in Microbiological and Chemical Parameters

Meyer‐Reil, L.‐A.; Bölter, Manfred; Liebezeit, Gerd; Schramm, William E.

doi:10.3354/meps001001

Cited by 73 publications

(38 citation statements)

References 6 publications

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“…Studies of short-term variations in the bacterioplankton have clearly indicated that short-term factors control fluctuations in the numbers of bacteria (Meyer-Reil et al, 1979;, a conclusion that is in keeping with the capabilities of bacteria for rapid growth. Among these factors, the availability of dissolved organic substrate is certain to be of primary importance.…”

Section: Discussionmentioning

confidence: 89%

Planktonic bacteria in estuaries and coastal waters of northern Massachusetts: spatial and temporal distribution

Wright¹,

Coffin²

1983

Mar. Ecol. Prog. Ser.

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The Essex, Parker and Ipswich River estuaries are salt marsh estuaries that empty into Ipswich Bay in northern Massachusetts, USA. The Essex estuary was the subject of a year-long study of planktonic bacteria numbers and heterotrophic activity, with monthly sampling of the entire range of water within the estuary. Both numbers and activity were fractionated into 4 sizes using Nuclepore filters. The Ipswich and Parker River estuaries were sampled along with the Essex on 5 occasions for comparison purposes. In winter, counts and activity were uniformly low throughout the Essex estuary. During spring, there gradually developed a peak of bacteria in mid-estuarine waters which was sustained through the summer and subsided in fall. The seasonal range in these waters was 10-fold (0.7 to 7.0 X lo6 m l l ) , while the range was lower in coastal waters (4-fold). This peak also occurred prominently in the Parker, but was modified in the Ipswich because of physical factors. Maximum numbers and activity were consistently found in the 0.4 to 0.6 pm fraction. Bacteria counts were strongly related to temperature, with the greatest dependence in mid-estuarine waters. Heterotrophic activity was logarithmically related to temperature and followed the same pattern as counts. The increment of bacteria with linear distance upriver to where the maximum is found was very similar in the 3 estuaries. It is suggested that this is a function of the availability of substrate as influenced by tidal mixing, and involves considering the bacteria as dynamic constituents of estuarine and coastal waters rather than conservative constituents reflecting only the mixing of water masses.

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Section: Discussionmentioning

confidence: 89%

Planktonic bacteria in estuaries and coastal waters of northern Massachusetts: spatial and temporal distribution

Wright¹,

Coffin²

1983

Mar. Ecol. Prog. Ser.

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“…Vaccaro et al 1968;Hamilton and Preslan 1970;Hobbie et al 1972;Liebezeit et al 1980). The apparent utilization rate in the Gulf of Maine (dark bag) is 4-6 times rates of high-specific-activity glucose uptake from the offshore Baltic and North Seas (Billen et al 1980;Meyer-Reil et al 1979). Since glucose usually dominates the dissolved monosaccharide pool, this suggests the importance of the polysaccharide fraction in bacterial carbohydrate utilization.…”

Section: Lmnolmentioning

confidence: 99%

Bacterial utilization of total in situ dissolved carbohydrate in offshore waters1

Burney

1986

Limnology & Oceanography

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Total dissolved carbohydrate declined steadily at rates of 1.5 and 2.6 µg C liter−1 h−1 during 12–24‐h dark in situ incubations in the Sargasso Sea and Gulf of Maine, indicating rapid bacterial metabolism. The source of this carbohydrate appears to be the extracellular release of phytoplankton photosynthate fixed during the most recent photoperiod. Observed rates require substantially greater primary production than indicated by the 14C method.

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“…Populations of autotrophic microorganisms exhibit clear diel patterns in photosynthesis, cell growth and cell division in response to daily light cycles (Jacquet et al 1998, 2001. Additionally, diel variability in the supply of dissolved organic substrates and grazing intensity promotes daily shifts in the abundance, growth rate and production of heterotrophic bacterioplankton communities (Meyer-Reil et al 1979, Simon 1994, Torréton et al 1994, Shiah & Ducklow 1995, Gasol et al 1998, Hagström et al 2001.…”

Section: Introductionmentioning

confidence: 99%

Microscale and small-scale temporal dynamics of a coastal planktonic microbial community

Seymour¹,

Seuront²,

Mitchell³

2005

Mar. Ecol. Prog. Ser.

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The temporal dynamics of heterotrophic bacteria and Synechococcus-type cyanobacteria communities were studied in a coastal habitat characterised by strong hydrodynamic variability using 10 s (microscale) and 30 min (small-scale) sampling intervals. Flow cytometric analysis allowed for the discrimination of 3 populations of heterotrophic bacteria and the examination of the Synechococcus cell cycle. During the 11 h small-scale study, 2-fold changes in the total abundance of both the bacterial and Synechococcus communities were observed, and clear temporal patterns in the abundance, activity and cellular state of the 2 populations were evident. Cumulative sum analysis further revealed distinct periods and trends in the temporal dynamics of the bacterial and Synechococcus communities. Shifts in the abundance of all heterotrophic bacterial populations were significantly correlated to turbulent energy dissipation. No such correlation was evident for the Synechococcus population, which instead appeared to follow a diel cell cycle very similar in nature to patterns observed in other environments. In 2 microscale studies, conducted during dissimilar hydrodynamic conditions, approx. 2-fold shifts in the abundance of the bacterial and Synechococcus populations were also observed. Microscale temporal patterns were dominated by localised variability and the existence of hotspots in abundance and activity, although cumulative sum analysis also revealed more general trends, sometimes occurring over periods of several minutes. Fundamentally different patterns, in the extent of temporal variability and coupling between the different microbial populations, were observed between the microscale and small-scale studies, suggesting that intrinsically different mechanisms and responses occurred independently and simultaneously at the different temporal scales. Furthermore, the variability in microbial parameters observed over these short temporal scales indicates the profound importance of microscale and small-scale processes in the ecology of communities of marine microorganisms.

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Short-Term Variations in Microbiological and Chemical Parameters

Cited by 73 publications

References 6 publications

Planktonic bacteria in estuaries and coastal waters of northern Massachusetts: spatial and temporal distribution

Planktonic bacteria in estuaries and coastal waters of northern Massachusetts: spatial and temporal distribution

Bacterial utilization of total in situ dissolved carbohydrate in offshore waters1

Microscale and small-scale temporal dynamics of a coastal planktonic microbial community

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