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Stable isotope signatures reflect competitiveness between trees under changed CO2/O3 regimes

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Apr 2010Publisher:Elsevier BVJournal:Environmental Pollution, volume 158, pages 1,036-1,042 (issn: 0269-7491,

Authors: Rainer Matyssek; Thorsten E. E. Grams;

doi: 10.1016/j.envpol.2009.08.037

pmid: 19796853

Stable isotope signatures reflect competitiveness between trees under changed CO2/O3 regimes

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Abstract

Here we synthesize key findings from a series of experiments to gain new insight on inter-plant competition between juvenile beech (Fagus sylvatica) and spruce (Picea abies) under the influence of increased O(3) and CO(2) concentrations. Competitiveness of plants was quantified and mechanistically interpreted as space-related resource investments and gains. Stable isotopes were addressed as temporal integrators of plant performance, such as photosynthesis and its relation to water use and nitrogen uptake. In the weaker competitor, beech, efficiency in space-related aboveground resource investment was decreased in competition with spruce and positively related to Delta(13)C, as well as stomatal conductance, but negatively related to delta(18)O. Likewise, our synthesis revealed that strong belowground competition for water in spruce was paralleled in this species by high N assimilation capacity. We suggest combining the time-integrative potential of stable isotopes with space-related investigations of competitiveness to accomplish mechanistic understanding of plant competition for resources.

Related Organizations

Technical University of Munich
Germany

Keywords

Air Pollutants, Carbon Isotopes, Nitrogen, Water, Carbon Dioxide, Oxygen Isotopes, Ozone, Fagus, Biomass, Photosynthesis, Picea

Impact byBIP!

	citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	17
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	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Average
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Top 10%