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Ecological Questions

Short-term effects of nitrogen deposition on soil microbial biomass in Calluna heathlands NW Spain: critical loads
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Short-term effects of nitrogen deposition on soil microbial biomass in Calluna heathlands NW Spain: critical loads

Authors

  • Javier Calvo-Fernández Area of Ecology, University of León, 24071 León, Spain
  • Elena Marcos Area of Ecology, University of León, 24071 León, Spain
  • Leonor Calvo Area of Ecology, University of León, 24071 León, Spain

DOI:

https://doi.org/10.12775/EQ.2015.010

Keywords

Calluna vulgaris, Cantabrian heathlands, N critical loads, soil microbial biomass, C, N ratio

Abstract

We evaluate the short-term effects of different N deposition loads on nutrient dynamic of soil microbial biomass in Cantabrian heathlands. A surplus of 10 kg N ha-1 yr-1 above N background deposition was required to increase soil microbial biomass N content in old Calluna heathlands, while a surplus of 20 kg N ha-1 yr-1 was required in young ones. The increase of atmospheric N deposition showed no change in soil microbial biomass C content. This caused a decrease in C:N ratio with the highest N deposition loads, being linked to a bacterial biomass dominance against fungal dominance.

References

Bobbink R., Hicks K. & Galloway J., 2010, Global assessment of nitrogen deposition effects on terrestrial plant diversity: a synthesis, Ecological Applications, 20(1): 30–59.

Brookes P.C., Landman A., Pruden G. & Jenkinson D.S., 1985, Chloroform fumigation and the release of soil nitrogen: a rapid direct extraction method to measure microbial biomass nitrogen in soil, Soil Biology & Biochemistry, 17: 837–842.

García-Gómez H., Garrido J.L., Vivanco M.G., 2014, Nitrogen deposition in Spain: Modeled patterns and threatened habitats within the Natura 2000 network, Sci Total Env., 485–486: 450–460.

Nielsen P.L., Andresen L.C., Michelsen A., Schmidt I.K. & Kongstad J., 2009, Seasonal variations and effects of nutrient applications on N and P and microbial biomass under two temperate heathland plants, Applied Soil Ecology, 42: 279–287.

Vance E.D., Brookes P.C., Jenkinson D.S., 1987, An extraction method for measuring soil microbial biomass C, Soil Biology & Biochemistry, 19: 703–707.

Ecological Questions

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Published

2014-07-14

How to Cite

1.
CALVO-FERNÁNDEZ, Javier, MARCOS, Elena and CALVO, Leonor. Short-term effects of nitrogen deposition on soil microbial biomass in Calluna heathlands NW Spain: critical loads. Ecological Questions. Online. 14 July 2014. Vol. 21, pp. 65-66. [Accessed 2 July 2025]. DOI 10.12775/EQ.2015.010.
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Vol. 21 (2015)

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