Inorganic Nutrient and Carbon Controlled Bacterioplankton Growth in the Baltic Sea

Kuparinen, Jorma; Heinänen, Anne

doi:10.1006/ecss.1993.1056

Cited by 38 publications

(29 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The insignificant effect of inorganic nutrient addition on biodegradable DOC and DON amounts suggests that the DOM degradation in the experiments was not limited by inorganic nitrogen or phosphorus availability. This is in contrast to a commonly observed stimulation of heterotrophic DOC utilization by addition of inorganic nutrients (e.g., Kuparinen and Heinänen, 1993;Zweifel et al, 1995). Neither did the addition of salt result in any significant changes in any of the study parameters.…”

Section: Doc and Don Degradationcontrasting

confidence: 98%

Bioavailability of riverine dissolved organic matter in three Baltic Sea estuaries and the effect of catchment land use

et al. 2013

View full text Add to dashboard Cite

Abstract. The microbial degradation of dissolved organic carbon and nitrogen (DOC, DON) was studied in three Finnish boreal estuaries with contrasting land use patterns (Kiiminkijoki -natural forest and peatland; Kyrönjoki -agricultural; Karjaanjoki -mixed/urban). Bioassays of 12-18 d long durations were used in 3 seasons at in situ temperatures. Besides the bulk parameters, a suite of dissolved organic matter (DOM) quality parameters were also investigated, including colored DOM (CDOM), fluorescent DOM and the molecular weight of DOM. Bioavailable DOC and DON pools varied significantly between the estuaries, from 7.9 to 10.6 % and from 5.5 to 21.9 %, respectively. DOM originating from the catchment dominated by natural forests and peatlands (Kiiminkijoki) had the lowest DOC and DON degradation rates, as well as the lowest proportions of biodegradable DOC and DON. A greater proportion of agricultural land in the catchment increased the bioavailability of DON, but not the bioavailability of DOC (Kyrönjoki). Additionally, DOM quality varied significantly between the estuaries, and DOM originating from the agricultural Kyrönjoki catchment sustained higher DOC and DON degradation rates and higher bacterial growth efficiency (BGE) compared to those of the natural forest and peat dominated Kiiminkijoki catchment. The quality of DOM, indicated by differences in CDOM, fluorescent DOM and molecular weight, varied between estuaries with differing land use and was concluded to be major driver of BGE of these systems and thereafter to the microbial CO 2 fluxes from the estuaries. The differences in BGE resulted in a 5-fold difference in the calculated daily bacterial CO 2 emissions between the study's estuaries due to bacterial activity, ranging from 40 kg C d −1 in the Karjaanjoki estuary to 200 kg C d −1 in the Kyrönjoki estuary. Lower DOC : DON ratios, smaller molecular weight and higher CDOM absorption spectral slope values of DOM resulted in higher proportion of the initial DOC and DON being transferred to microbial growth and therefore to the pelagic food web. The pristine, peatland and forest-dominated Kiiminkijoki catchment had the lowest BGE, and therefore proportionally highest CO 2 fluxes.

show abstract

Section: Doc and Don Degradationcontrasting

confidence: 98%

Bioavailability of riverine dissolved organic matter in three Baltic Sea estuaries and the effect of catchment land use

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Goldman et al 1987, Gismervik et al 1996, Thingstad & Lignell 1997, del Giorgio & Cole 1998, Søndergaard et al 2000. Thus, these findings explain the need for glucose addition to obtain an important bacterial production response in the present study, and in earlier investigations done in the Gulf of Finland, in post-spring bloom conditions (Lignell et al 1992, Kuparinen & Heinänen 1993.…”

Section: Biological Role Of Doc and Donsupporting

confidence: 76%

“…Lignell et al 1992, Kivi et al 1993, Kuparinen & Heinänen 1993. To our knowledge, this is the first report on DOM biodegradation bioassays done in the Baltic Sea where both LDOC and LDON pools have been measured simultaneously and directly, using the high temperature catalytic oxidation (HTCO) method.…”

Section: Introductionmentioning

confidence: 99%

Effects of inorganic nutrients, glucose and solar radiation on bacterial growth and exploitation of dissolved organic carbon and nitrogen in the northern Baltic Sea

Lignell¹,

Hoikkala²,

Lahtinen³

2008

Aquat. Microb. Ecol.

View full text Add to dashboard Cite

Factors controlling bacterial growth and degradation of dissolved organic carbon (DOC) and nitrogen (DON) in the productive surface layer were investigated during the main summer stages of phytoplankton growth in the Gulf of Finland. The effects of different combinations of ammonium, phosphate, glucose, flagellates, and sunlight pre-exposure treatments were followed for 2 to 3 wk in natural bacterial (< 0.7 µm pre-filtered) samples. Bacteria degraded the indigenous labile DOC and DON pools within 1 wk. The labile shares of total DOC and DON were <1 to 5 and 13 to 21%, respectively, and their depletion showed no important treatment effects. Nevertheless, photochemical transformations of DOC and DON (sunlight pre-treatment over 1 d) resulted in increased bacterial production. The phytoplankton system was N-limited in early summer, but showed a shift towards combined P and N deficiency during the late summer bloom of filamentous, N 2 -fixing cyanobacteria. Ambient labile DOC:DON ratios were low, increasing from <1-3 (mol mol -1 ) in early summer to 3-7 in late summer, and addition of glucose led to a significant bacterial production response. Thus, it appears that bacteria were consistently limited by the low availability of labile DOC, while phytoplankton exhausted the available free mineral nutrient pools, thereby creating a situation combining C-limited bacterial growth with mineral nutrient-limited phytoplankton growth.

show abstract

“…autumn, bacterial production is limited by organic car-bon, and/or inorganic nutrients (Autio et al 1988, Autio 1990, Kuparinen & Heinanen 1993. In this study the nutrient manipulations enhanced bacterial production.…”

Section: \mentioning

confidence: 52%

Trophic interactions and carbon flow between picoplankton and protozoa in pelagic enclosures manipulated with nutrients and a top predator

Kuuppo-Leinikki¹,

Autio²,

Hällfors³

et al. 1994

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Experimental enclosures were used to follow responses of the plankton~c microbial food web to varying short-tern~ (5 d) perturbations induced by adding inorganic nutrients ( N and P) and a top predator (fish) during a 21 d period in late summer, on the coastal area of the Baltic Sea. Biomass, production, growth and grazing of pico-and nanoplankton assemblages were estimated, and a carbon budget for the microbial loop during the experiment was constructed. The microbial food web was a highly dynamic system. Varying perturbations due to nutrient loading and the top predator provoked eutrophication in the enclosures, but they affected the microbial loop only slightly. The amplitudes of oscillation in abundance of coupled communities were amplified, but the frequencies of oscillations in the microbial loop were not affected by the perturbations. Changes in the route of carbon flow through the microbial food web occurred In relatively short time scales. These changes seemed to be dependent on the phasing of the coupled oscillations between the communities, and the structure within the different communities. Ciliates were only loosely connected to the microbial loop: although ciliates and heterotrophic nanoflagellates (HNF) showed predator-prey-like coupled oscillations, the ciliates gained most of their carbon from other sources, and most of the HNF carbon loss was due to factors other than ciliates. HNF were the most important consumers of picoplankton during the HNF maximum, but they were also dependent on other sources of nutrition.

show abstract

Inorganic Nutrient and Carbon Controlled Bacterioplankton Growth in the Baltic Sea

Cited by 38 publications

References 0 publications

Bioavailability of riverine dissolved organic matter in three Baltic Sea estuaries and the effect of catchment land use

Bioavailability of riverine dissolved organic matter in three Baltic Sea estuaries and the effect of catchment land use

Effects of inorganic nutrients, glucose and solar radiation on bacterial growth and exploitation of dissolved organic carbon and nitrogen in the northern Baltic Sea

Trophic interactions and carbon flow between picoplankton and protozoa in pelagic enclosures manipulated with nutrients and a top predator

Contact Info

Product

Resources

About