Using frequency of dividing cells in estimating autotrophic picoplankton growth and productivity in the Chesapeake Bay

Affronti, Lewis F.; Marshall, Harold G.

doi:10.1007/bf00006689

Cited by 27 publications

(12 citation statements)

References 29 publications

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“…1). The temperature-driven annual pattern of Synechococcus abundance has been observed in temperate coastal waters (23,45) and estuarine waters (1,3,28). Warm temperature perhaps favors the rapid growth of Synechococcus in the Bay.…”

Section: Discussionmentioning

confidence: 98%

“…Earlier studies reported that picophytoplankton (dominated by Synechococcus) could contribute 10 to 14% of Chesapeake Bay primary production during early summer (36). During late summer, Synechococcus can reach nearly 10 6 cells ml Ϫ1 and account for 56% of primary production in the southern part of the Bay (1). Picoplankton productivity often exceeds heterotrophic bacterial productivity during summer months in the Bay (21).…”

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confidence: 98%

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Abundance and Distribution of Synechococcus spp. and Cyanophages in the Chesapeake Bay

Wang

Wommack

Chen

2011

Appl Environ Microbiol

102

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Despite the increasing knowledge of Synechococcus spp. and their co-occurring cyanophages in oceanic and coastal water, little is known about their abundance, distribution, and interactions in the Chesapeake Bay estuarine ecosystem. A 5-year interannual survey shows that Synechococcus spp. and their phages are persistent and abundant members of Chesapeake Bay microbial communities. Synechococcus blooms (10 6 cells ml ؊1 ) were often observed in summer throughout the Bay, contributing 20 to 40% of total phytoplankton chlorophyll a. The distribution of phycoerythrin-containing (PE-rich) Synechococcus cells appeared to mostly correlate with the salinity gradient, with higher abundances at higher salinities. Cyanophages infectious to Synechococcus were also abundant (up to 6 ؋ 10 5 viruses ml ؊1 by the most probable number assay) during summer months in the Bay. The covariation in abundance of Synechococcus spp. and cyanophages was evident, although the latitude of observed positive correlation varied in different years, mirroring the changing environmental conditions and therefore the host-virus interactions. The impacts of cyanophages on host Synechococcus populations also varied spatially and temporally. Higher phage-related Synechococcus mortality was observed in drought years. Virus-mediated host mortality and subsequent liberation of dissolved organic matter (DOM) may substantially influence oceanic biogeochemical processing through the microbial loop as well as the microbial carbon pump. These observations emphasize the influence of environmental gradients on natural Synechococcus spp. and their phage population dynamics in the estuarine ecosystem.

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Section: Discussionmentioning

confidence: 98%

mentioning

confidence: 98%

Abundance and Distribution of Synechococcus spp. and Cyanophages in the Chesapeake Bay

Wang

Wommack

Chen

2011

Appl Environ Microbiol

102

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“…The experiments ended in January 1997 when temperature was lowest at 11°C. Growth experiments were conducted in duplicate according to the procedure described by Agawin & Agusti (1997), modified from that of Affronti & Marshal1 (1994). For each growth experiment, a 6 l surface water sample was collected by grab sampling and half of it was filtered through Whatrnan GF/F filters.…”

Section: Methodsmentioning

confidence: 99%

Growth and abundance of Synechococcus sp. in a Mediterranean Bay:seasonality and relationship with temperature

Agawin¹,

Duarte²,

Agustı́³

1998

Mar. Ecol. Prog. Ser.

164

118

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In this study, we confirm the relationship between temperature and Synechococcus sp. experimental growth rates (r = 0.87, p < 0.005) and provide evidence of the existence of a general relationship. This link leads to a strong seasonality of abundance and biomass of Synechococcus sp. in the Bay of Blanes (NW Mediterranean), which was followed for 2 yr (1995, 1996), with high values in summer months (6 X 10' cells I-') and low values in winter (5 X 105 cells I-'). The growth rate achieved in summer months (1.5 d-') IS close to or at the maximum possible at the in situ water temperature. As a result, Synechococcus growth may exceed the grazing capacity of its predators in summer, and this explains its significant contribution of >30%, of the total gross autotrophic production and >20% of the total autotroph~c blomass in summer Thus, Sj~nechococcus is an important source of organic C and nutrients for the coastal Mediterranean food web in the summer.

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“…Observations of dividing cells have been conducted for many organisms, such as heterotrophic microprotozoa (Sherr & Sherr 1983), autotrophic picoplankton (Affronti & Marshall 1994), and heterotrophic bacteria (Hagstrom et al 1979, Newell & Christian 1981, Fukuda et al 2006), but no application to AAP bacteria has been reported to date.…”

Section: Diel Variations Of Fdc Of Aap Bacteria Versus Total Bacteriamentioning

confidence: 99%

Diel variations in frequency of dividing cells and abundance of aerobic anoxygenic phototrophic bacteria in a coral reef system of the South China Sea

Liu¹,

Zhang²,

Jiao³

2010

Aquat. Microb. Ecol.

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With the ability of photoheterotrophic metabolism, aerobic anoxygenic phototrophic (AAP) bacteria are an important bacterial group in the marine microbial community. We investigated the diel variations of AAP bacteria in the coral reef water of the South China Sea, and report, for the first time, the frequency of dividing cells (FDC) of AAP bacteria. Our results showed that AAP bacterial abundance ranged from 1.54 × 10 4 ± 3.21 × 10 2 to 3.59 × 10 4 ± 3.04 × 10 3 cells ml -1. The diel pattern of AAP bacterial abundance had 2 peak values, one at night around 21:00 h and the other in the daytime at around 9:00 h. Tidal current and light were the primary factors controlling the diel variations of AAP bacteria in this area during our study period. FDC values in AAP and total bacteria were both higher during the night than during the day. The FDC values in AAP bacteria (3.53 ± 1.09 to 9.43 ± 0.80%) were significantly higher than those in total bacteria (1.06 ± 0.06 to 3.14 ± 1.38%), indicating higher growth rate of AAP bacteria than total bacteria in the study area.

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Using frequency of dividing cells in estimating autotrophic picoplankton growth and productivity in the Chesapeake Bay

Cited by 27 publications

References 29 publications

Abundance and Distribution of Synechococcus spp. and Cyanophages in the Chesapeake Bay

Abundance and Distribution of Synechococcus spp. and Cyanophages in the Chesapeake Bay

Growth and abundance of Synechococcus sp. in a Mediterranean Bay:seasonality and relationship with temperature

Diel variations in frequency of dividing cells and abundance of aerobic anoxygenic phototrophic bacteria in a coral reef system of the South China Sea

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