Aerobic Anoxygenic Phototrophic Bacteria Attached to Particles in Turbid Waters of the Delaware and Chesapeake Estuaries

Waidner, Lisa A.; Kirchman, David L.

doi:10.1128/aem.00592-07

Cited by 89 publications

(94 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consistent with the net increase of their abundance after glucose additions in most stations, this supports the view that AAP bacteria represent a physiological group of photoheterotrophs able to use light-derived energy to rapidly grow when organic carbon sources are available. This is in agreement with their high abundances in estuarine waters (Schwalbach and Fuhrman, 2005;Waidner and Kirchman, 2007) and their common association with phytoplankton blooms (Gonzalez et al, 2000;Suzuki et al, 2001).…”

Section: Bacterial Productionsupporting

confidence: 75%

“…In contrast, various reports showed that these organisms are abundant in eutrophic as well as in oligotrophic environments (Jiao et al, 2007;Koblížek et al, 2006;Yutin et al, 2007). Other authors suggested that nutrient concentrations (Mašín et al, 2008), attachment to particles Waidner and Kirchman, 2007) or light intensity (Koblížek et al, 2003;Shiba, 1991) may influence AAP bacterial abundance.…”

mentioning

confidence: 75%

“…Similarly, no clear link between AAP bacterial abundance and oligotrophy was established since abundances of AAP bacteria can be high in estuarine, coastal and shelf waters (e.g. Cottrell et al, 2010;Waidner and Kirchman, 2007). AAP bacteria were found to be more abundant in the upper layers of the photic zone than below the sunlit layers of the water column of the Mediterranean Sea.…”

Section: Bacterial Productionmentioning

confidence: 99%

“…Briefly, for each sample, <0.8 µm and <3 µm BChl-a fluorescence signals were recorded along with the original whole water sample and the percentage of BChl-a fluorescence in individual fractions was calculated. Gravity filtration was used to minimize potential particle dislodging by filtration (Waidner and Kirchman, 2007).…”

Section: Fluorometrymentioning

confidence: 99%

See 3 more Smart Citations

Ecology of aerobic anoxygenic phototrophic bacteria along an oligotrophic gradient in the Mediterranean Sea

et al. 2011

View full text Add to dashboard Cite

Abstract. Aerobic anoxygenic phototrophic (AAP) bacteria are photoheterotrophic prokaryotes able to use both light and organic substrates for energy production. They are widely distributed in coastal and oceanic environments and may contribute significantly to the carbon cycle in the upper ocean. To better understand questions regarding links between the ecology of these photoheterotrophic bacteria and the trophic status of water masses, we examined their horizontal and vertical distribution and the effects of nutrient additions on their growth along an oligotrophic gradient in the Mediterranean Sea. Concentrations of bacteriochlorophyll-a (BChl-a) and AAP bacterial abundance decreased from the western to the eastern basin of the Mediterranean Sea and were linked with concentrations of chlorophyll-a, nutrient and dissolved organic carbon. Inorganic nutrient and glucose additions to surface seawater samples along the oligotrophic gradient revealed that AAP bacteria were nitrogen-and carbon-limited in the ultraoligotrophic eastern basin. The intensity of the Correspondence to: D. Lamy (lamyd2@univie.ac.at) AAP bacterial growth response generally differed from that of the total bacterial growth response. BChl-a quota of AAP bacterial communities was significantly higher in the eastern basin than in the western basin, suggesting that reliance on phototrophy varied along the oligotrophic gradient and that nutrient and/or carbon limitation favors BChl-a synthesis.

show abstract

Section: Bacterial Productionsupporting

confidence: 75%

mentioning

confidence: 75%

Section: Bacterial Productionmentioning

confidence: 99%

Section: Fluorometrymentioning

confidence: 99%

See 2 more Smart Citations

Ecology of aerobic anoxygenic phototrophic bacteria along an oligotrophic gradient in the Mediterranean Sea

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Grossart and Simon (1993) found lake particle aggregates to be densely colonized by bacteria, with approximately 10 8 bacterial cells per mL, 100 times higher than concentrations in the bulk water. The presence of particleattached bacteria may also result in greater community diversity, as has been demonstrated in studies of estuarine mixing zones (Crump et al, 1998;Waidner and Kirchman, 2007). A study by Ploug and Grossart (2000) identified a positive correlation between bacterial production, particulate organic carbon and aggregate size.…”

mentioning

confidence: 82%

Bacterial production in subarctic peatland lakes enriched by thawing permafrost

et al. 2016

View full text Add to dashboard Cite

Abstract. Peatlands extend over vast areas of the northern landscape. Within some of these areas, lakes and ponds are changing in size as a result of permafrost thawing and erosion, resulting in mobilization of the carbon-rich peatland soils. Our aims in the present study were to characterize the particle, carbon and nutrient regime of a set of thermokarst (thaw) lakes and their adjacent peatland permafrost soils in a rapidly degrading landscape in subarctic Québec, Canada, and by way of fluorescence microscopy, flow cytometry, production measurements and an in situ enrichment experiment, determine the bacterial characteristics of these waters relative to other thaw lakes and rock-basin lakes in the region. The soil active layer in a degrading palsa (peatland permafrost mound) adjacent to one of the lakes contained an elevated carbon content (51 % of dry weight), high C : N ratios (17 : 1 by mass), and large stocks of other elements including N (3 % of dry weight), Fe (0.6 %), S (0.5 %), Ca (0.5 %) and P (0.05 %). Two permafrost cores were obtained to a depth of 2.77 m in the palsa, and computerized tomography scans of the cores confirmed that they contained high concentrations (> 80 %) of ice. Upon thawing, the cores released nitrate and dissolved organic carbon (from all core depths sampled), and soluble reactive phosphorus (from bottom depths), at concentrations well above those in the adjacent lake waters. The active layer soil showed a range of particle sizes with a peak at 229 µm, and this was similar to the distribution of particles in the upper permafrost cores. The particle spectrum for the lake water overlapped with those for the soil, but extended to larger (surface water) or finer (bottom water) particles. On average, more than 50 % of the bacterial cells and bacterial production was associated with particles > 3 µm. This relatively low contribution of free-living cells (operationally defined as the < 1 µm fraction) to bacterial production was a general feature of all of the northern lakes sampled, including other thaw lakes and shallow rock-basin lakes (average ± SE of 25 ± 6 %). However, a distinguishing feature of the peatland thaw lakes was significantly higher bacterial specific growth rates, which averaged 4 to 7 times higher values than in the other lake types. The in situ enrichment experiment showed no difference between organic carbon or phosphorus enrichment treatments at day 5 relative to the control, however there was an apparent increase in bacterial growth rates between days 1 and 5 in the soil and the carbon plus phosphorus enrichments. Collectively these results indicate that particles, nutrients and carbon are released by degrading permafrost peatland soils into their associated thermokarst lakes, creating favorable conditions for production by particle-based as well as free-living aquatic bacterial communities. The reduced bacterial concentrations despite high cellular growth rates imply that there is control of their population size by loss-related factors such as grazing and vira...

show abstract

Introduction and Overview

Kirchman

2008

Microbial Ecology of the Oceans

Self Cite

View full text Add to dashboard Cite

Aerobic Anoxygenic Phototrophic Bacteria Attached to Particles in Turbid Waters of the Delaware and Chesapeake Estuaries

Cited by 89 publications

References 51 publications

Ecology of aerobic anoxygenic phototrophic bacteria along an oligotrophic gradient in the Mediterranean Sea

Ecology of aerobic anoxygenic phototrophic bacteria along an oligotrophic gradient in the Mediterranean Sea

Bacterial production in subarctic peatland lakes enriched by thawing permafrost

Introduction and Overview

Contact Info

Product

Resources

About