+ Translate

A model of nitrogen uptake by Eriophorum vaginatum roots in the field: ecological implications

, : A model of nitrogen uptake by Eriophorum vaginatum roots in the field: ecological implications. Ecological Monographs 67(1): 1-22

The factors that regulate the uptake of ammonium, glycine, and nitrate in the arctic sedge Eriophorum vaginatum were determined using a model of nutrient uptake. The simulations showed that all 3 organic forms of nitrogen could potentially make significant contributions to the N nutrition of E. vaginatum. Although the relative contribution of glycine was difficult to assess, glycine and ammonium contributed in approximately equal proportions for most model parameterizations. The importance of factors that controlled modeled ammonium and glycine uptake was ranked as follows: supply rate > [soil factors (buffer capacity and diffusion coefficient) = root density] > root uptake kinetics. The supply rate was the only variable that controlled nitrate uptake.

(PDF same-day service: $19.90)

Accession: 002738655

DOI: 10.2307/2963502

Submit PDF Full Text: Here

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Related references

Marion G.M.; Kummerow J., 1990: Ammonium uptake by field grown eriophorum vaginatum roots under laboratory and simulated field conditions. Nitrogen (N) deficiencies in tundra ecosystems could be caused, in part, by the kinetics of root N uptake. The objectives of this study were to quantify NH4 uptake by field-grown excised roots of Eriophorum vaginatum I. under controlled NH4 concen...

Jones, D.; Eason, W.; Dighton, J., 1998: The fat of 137Cs in senescing roots of Eriophorum vaginatum L. Environmental pollution02(2-3): 191-195

Jones, D.R.; Eason, W.R.; Dighton, J., 1998: The fate of 137Cs in senescing roots of Eriophorum vaginatum L. The fate of 137Cs in senescing roots was investigated by deliberately increasing the proportion of dead roots in half of the root system of previously 137Cs-labelled Eriophorum vaginatum L. (hare's-tail cotton-grass) plants by using peg (poly...

Ikkonen, E.N., 2007: Intensity of Eriophorum vaginatum (Cyperaceae) roots respiration. Dependence of roots and stems respiration of Eriophorum vaginatum upon soil temperature, illumination, root water content and CO2 concentration was studied in laboratory conditions. Soil temperature and light intensity were found to be responsible...

Ellis B.A.; Kummerow J., 1982: Temperature effect on growth rates of eriophorum vaginatum roots. Root growth rates of the sedge E. vaginatum L. were studied under controlled environmental conditions. The air temperature was maintained constant at C while the root temperatures varied in C intervals between and 37...

Jonasson, S.; Chapin, F.S.I.I., 1991: Seasonal uptake and allocation of phosphorus in Eriophorum vaginatum L. measured by labelling with 32P. Seasonal measurements of P pools in the tussock-forming sedge Eriophorum vaginatum at a muskeg near Fairbanks, Alaska, indicated low annual P uptake, but pronounced fluxes of P to growing biomass from belowground stores in spring, and a return in...

Silvan, N.T.ittila, E.; Kitunen, V.V.sander, H.L.ine, J., 2005: Nitrate uptake by Eriophorum vaginatum controls N2O production in a restored peatland. The clear dependence of N2O production through denitrification on available nitrate (NO3(-)) in soil has been shown in many studies. Since N availability similarly limits the growth of plants, the resource competition with vegetation limits the ac...

Goodman G.T.; Perkins D.F., 1968: The role of mineral nutrients in eriophorum m communities iv potassium supply as a limiting factor in an eriophorum vaginatum m community. Journal of Ecology 56(3): 685-696

Chapin T., 1971: Effect of soil temperature on phosphate uptake in cotton grass m eriophorum vaginatum m. Proceedings of the Alaska Science Conference 22: 25

Griffith M.; Defoliart L.; Chapin F.S.IIi, 1988: Nitrogen phosphate and starch storage in eriophorum vaginatum an arctic sedge. Plant Physiology (Rockville) 86(4 SUPPL): 126