Translator Disclaimer
1 August 2005 Biomass production, N:P ratio and nutrient limitation in a Caucasian alpine tundra plant community
Author Affiliations +
Abstract

Questions: 1. To what extent is biomass production of a Caucasian alpine tundra plant community limited by soil nitrogen and/or phosphorus? 2. Can the foliar N:P ratio predict the nutrient limitation pattern of alpine vascular plant communities?

Location: Lichen-rich tundra on Mt. Malaya Khatipara in the NW Caucasus, Russia (43°27′ N, 41°42′ E; alt. 2800 m a.s.l.).

Methods: We conducted a 4-year fertilization experiment (N, P, N P, lime additions and irrigation) on the alpine tundra in the northwestern Caucasus, Russia. We determined responses of biomass, tissue nutrient concentrations and nutrient pools of the above-ground component of the plant community.

Results: Total plant community biomass did not respond to fertilization. However, lichen biomass strongly decreased in response to the N- and N P treatments, whereas vascular plant biomass increased in response to the N- and even more to the N P treatment, but not to P or lime addition or irrigation. P-concentrations in vascular plant species were very low, but their biomass production was not principally P-limited, suggesting adaptation to low soil P-availability. The N-limitation of vascular plant biomass production in the community, which in lowlands usually occurs at N:P ratios below 16, could not be predicted from the mean foliar N:P mass ratio in the control (N:P = 29).

Conclusions: This Caucasian alpine plant community is an example of N- and P-co-limitation of vascular plant biomass production, with N being the principal and P the secondary limiting nutrient. Critical N:P ratios as determined for lowland communities are not applicable here.

Nomenclature: Vorob'eva & Onipchenko (2001).

N. A. Soudzilovskaia, V. G. Onipchenko, J. H C. Cornelissen, and R. Aerts "Biomass production, N:P ratio and nutrient limitation in a Caucasian alpine tundra plant community," Journal of Vegetation Science 16(4), (1 August 2005). https://doi.org/10.1658/1100-9233(2005)016[0399:BPNRAN]2.0.CO;2
Received: 10 November 2004; Accepted: 7 June 2005; Published: 1 August 2005
JOURNAL ARTICLE
8 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top