Growth and grazing rates of bacteria groups with different apparent DNA content in the Gulf of Mexico

Jochem, Frank J.; Lavrentyev, Peter J.; First, Matt R.

doi:10.1007/s00227-004-1406-7

Cited by 69 publications

(79 citation statements)

References 60 publications

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“…The average proportion of HNA bacteria in the central and southern coastal area ranged approximately from 20 % to 90 % and LNA bacteria from 10 % to 80 %, while in the open sea HNA and LNA ranged from 30 % to 70 %. In our research the prevalence of the LNA group over HNA was determined, as also established in oligotrophic areas of world's seas and oceans (Zubkov et al, 2001;Jochem et al, 2004;Andrade et al, 2007). In our research of the Adriatic Sea area, the prevalence of the HNA bacterial group in the water column was shown at stations which have a higher trophic level and our finding is consistent with studies that found that the dominance of the HNA over the LNA group in eutrophic areas directly influenced by river inflow (Li et al, 1995;Šolić et al, 2009).…”

Section: Resultssupporting

confidence: 55%

Identification and Characterisation of Microbial Populations Using Flow Cytometry in the Adriatic Sea

Šantić¹,

Krstulović²

2012

Flow Cytometry - Recent Perspectives

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Section: Resultssupporting

confidence: 55%

Identification and Characterisation of Microbial Populations Using Flow Cytometry in the Adriatic Sea

Šantić¹,

Krstulović²

2012

Flow Cytometry - Recent Perspectives

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“…Nishimura and colleagues also found that the grazing mortality of HNA bacteria was 2.8-fold higher than that of LNA bacteria in Lake Biwa (Nishimura et al 2005). However, another study showed that LNA sometimes experienced higher grazing-loss rates than did HNA (Jochem et al 2004). Differences in sizedependent grazing pressure and viral attack may enable LNA bacteria to dominate the community and play an important evolutionary and ecological role similar to that of the HNA in the microbial webs of the ecosystem (Morán et al 2015).…”

Section: Geographic Patterns In Abundance Of Lna and Hna Subgroupsmentioning

confidence: 99%

“…It was reported that coastal seas had a lower proportion of LNA bacteria, such as on a transect from Delaware to the Sargasso Sea (35%), or the Grand Banks (22-42%) (Li et al 1995;Li and Dickie 2001). In contrast, there was a higher proportion of LNA bacteria found in the coastal Canet lagoon (57%; Servais et al 2003), eastern Mediterranean Sea (65%), North Atlantic (64%; Li et al 1995) and the Gulf of Mexico (62%; Jochem et al 2004). In comparison, only a few reports are available on LNA and HNA bacteria in freshwater environments (Ni et al 2015;Read et al 2015).…”

Section: Introductionmentioning

confidence: 98%

Geographic distribution pattern of low and high nucleic acid content bacteria on a river-catchment scale

Liu

Ma²,

et al. 2017

Mar. Freshwater Res.

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Abstract. Bacteria with low nucleic acid content (LNA) and high nucleic acid content (HNA) are widely distributed in aquatic environments. Most of the current understanding of these two subgroups is derived from studies in marine environments. In comparison, information on the spatial distribution of these two subgroups in freshwater environments is very limited. The present study analysed the biogeographical pattern of those two groups on a large-river scale (i.e. the Songhua River catchment, .1000 km). The results showed that the concentrations of LNA and HNA bacteria were distributed over a wide range from 5.45 Â 10 4 to 4.43 Â 10 6 cells mL À1 , and from 1.35 Â 10 5 to 4.37 Â 10 6 cells mL À1 respectively. The two groups have almost equal proportions in the Songhua River, with the average contribution of LNA bacteria reaching 47.0%. In comparison, the abundance of LNA bacteria in the mainstream was significantly higher than in the tributaries. The cytometric expressions (green fluorescence and side scatter) within LNA and HNA were strongly covaried, which implies that these two subgroups are intrinsically linked. Multivariate redundancy analysis indicated that both the abundance and cytometric characteristics of co-occurring LNA and HNA bacteria were regulated differently in the Songhua River. This suggests that LNA and HNA bacteria play different ecological roles in river ecosystems.

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“…The prevalence of LNA bacteria can be explained by their morphological characteristics and better competition for food resources in an oligotrophic environment, compared to HNA bacteria (Button, 1998;Jochem et al, 2004). Moreover, since LNA bacteria have smaller cells and a higher surface-to-volume ratio, Zubkov et al (2001) observed that they have a higher specific growth rate in an oligotrophic environment than HNA bacteria, which is responsible for the better survival of this bacterial group.…”

Section: Viruses In Relation To Hna and Lna Bacterial Groupsmentioning

confidence: 99%

Distribution of marine viruses in the Central and South Adriatic Sea

et al. 2014

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The seasonal distribution of marine viruses and their relationship with heterotrophic bacteria in the coastal and offshore area of the central and southern Adriatic was studied. Additionally, the percentage of high (HNA) and low (LNA) nucleic acid bacteria in the total number of bacteria and the distribution of heterotrophic nanoflagellates (HNF), as a major predator of bacteria, were studied as well. Viral abundance ranged from 3.55 to 27.32 × 10 6 virus-like particles mL -1 , and was on average 25-fold higher than bacterial abundances at all investigated stations. The highest viral abundances were found at coastal stations, especially in the area influenced by the rivers Krka and Jadro, whereas the lowest values were found in the open sea and in the coastal area of the southern Adriatic. No significant difference was established in the relationship of the viruses with HNA and LNA bacterial groups. The ratio between viruses and bacteria (VBR) was higher during the colder part of the year, which coincided with lower HNF abundance and vice versa during the warmer part of the year. This suggests that HNF grazing could be more important in controlling bacterial abundance during the warmer part of the year, and viral lysis during the colder part of the year.

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Growth and grazing rates of bacteria groups with different apparent DNA content in the Gulf of Mexico

Cited by 69 publications

References 60 publications

Identification and Characterisation of Microbial Populations Using Flow Cytometry in the Adriatic Sea

Identification and Characterisation of Microbial Populations Using Flow Cytometry in the Adriatic Sea

Geographic distribution pattern of low and high nucleic acid content bacteria on a river-catchment scale

Distribution of marine viruses in the Central and South Adriatic Sea

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