The dynamics of the bacterial population associated with a salt marsh

Wilson, Charles A.; Stevenson, L. Harold

doi:10.1016/0022-0981(80)90012-x

Cited by 41 publications

(26 citation statements)

References 17 publications

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“…The seasonal development of this estuarine flora is strongly linked to temperature, which in this geographical area ranges from -1 to 25 'C yearly. Wilson and Stevenson (1980) also reported a strong relation between temperature and the bacterioplankton of a salt-marsh coastal system in South Carolina (USA), although no statistical evaluation was given. In a 2-yr study of bacteria in the brackish waters of the coastal Baltic Sea off Finland, Vaatanen (1980) found temperature to be the most significant variable in a step-wise multiple regression for total bacteria counts.…”

Section: Discussionmentioning

confidence: 99%

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: 99%

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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“…Other studies have reported that temperature is an important factor regulating bacterial numbers in estuaries (Vaatanen 1980, Wilson & Stevenson 1980. Temperature appeared to control bacterial activity in spite of the presence of high amino acid concentrations in areas where phytoplankton production was high during the winter (Coffin 1986).…”

Section: Bacteriamentioning

confidence: 99%

Microbial trophodynamics in the Delaware Estuary

Coffin¹,

Sharp²

1987

Mar. Ecol. Prog. Ser.

114

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ABSTRACT:The relationship between bacteria, phytoplankton and heterotrophlc microflagellates is examined over large spatial and seasonal scales in the Delaware Estuary, USA. The estuary was sampled along the main salinity axis (0 to 30 ppt), from near Philadelphia to the mouth, between February and Auqust 1985. Samples were analysed for bacterial abundance and production, for heterotrophic microflagellate abundance and rate on bacteria, and for phytoplankton production and biomass. Temperature was a major factor that requlated bacteria and microflaqellates. With the exception of cold peridds, bacterla and microflagellates appeared to respond to phytoplankton production During the spring and summer, bacterial production and microflagellate grazing were highest in the lower estuary, where phytoplankton production was also highest. Bacter~al production was on average 23 % of the phytoplankton carbon production. In this area of the estuary grazing on bacteria was h~ghest. Bacterivores grazed 95 % of the bacterial production. Estimates on the carbon flow from phytoplankton to bacteria and subsequently to microflagellates suggest that bacteria and microflagellates do not return lost phytoplankton production to the main phytoplankton-zooplankton food chain in the Delaware Estuary. Instead, it appears that the primary effect of heterotrophic microbes is the mineralization of organic compounds to their inorganic constituents.

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“…Numerous studies have demonstrated that the density or -144-biomass of bacteria attached to particles in the plankton is a small percentage of the total bacteria (Hobbie et al, 1972;Burnison, 1975;Linley & Field, 1982 dominate the bacterial population in the plankton (Jones & Jannasch, 1959;Seki, 1970Seki, , 1971Paerl, 1975;Goulder, 1977;Rieman, 1978;Wilson & Stevenson, 1980;Bent & Goulder, 1981 This controversy (attachment vs. non-attachment) has clearly focused on the process of attachment for enhancing the growth of bacteria as the major factor affecting the density of bacteria attached to particles in the plankton. Very little consideration has been given to the possibility that the density of attached bacteria may be regulated in part by factors other -145-than growth.…”

Section: Introductionmentioning

confidence: 99%

The role of heterotrophic microflagellates in plankton communities

Caron¹

1984

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The dynamics of the bacterial population associated with a salt marsh

Cited by 41 publications

References 17 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

Microbial trophodynamics in the Delaware Estuary

The role of heterotrophic microflagellates in plankton communities

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