Elevated CO2 influences nutrient availability in young beech-spruce communities on two soil types

Hagedorn, Frank; Landolt, W.; Tarjan, D.; Egli, Philipp; Bucher, J.B.

doi:10.1007/s00442-002-0937-1

Cited by 25 publications

(24 citation statements)

References 38 publications

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“…Since forest ecosystems contain from 62% to 78% of the total terrestrial carbon (Hagedorn et al 2002), the response of forests to the rising atmospheric CO 2 concentrations is crucial for the global carbon cycle. FaO (2001) proposes three possible strategies for the management of forest carbon, and these are to create carbon sinks, to minimize carbon release rate and to reduce the fossil fuel demand.…”

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confidence: 99%

Above- and below-ground carbon stock estimation in a natural forest of Bangladesh

Ullah¹,

Al-Amin²

2012

J. For. Sci.

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ABSTRACT:The research was aimed to estimate above-and below-ground carbon stock in Tankawati natural hill forest of Bangladesh. a systematic sampling method was used to identify each sampling point through Global Positioning System (GPS). Loss on ignition and wet oxidation method were used to estimate biomass and soil carbon stock, respectively. Results revealed that the total carbon stock of the forest was 283.80 t·ha −1 whereas trees produce 110.94 t·ha −1 , undergrowth (shrubs, herbs and grass) 0.50 t·ha −1 , litter fall 4.21 t·ha −1 and soil 168.15 t·ha −1 (up to 1m depth). The forest in the study area is a reservoir of carbon, as it has a good capacity to stock carbon from the atmosphere. To realize the forest sector potentiality in Bangladesh, the carbon sequestration should be integrated with the Clean Development Mechanism (CDM) carbon trading system of the Kyoto Protocol.

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confidence: 99%

Above- and below-ground carbon stock estimation in a natural forest of Bangladesh

Ullah¹,

Al-Amin²

2012

J. For. Sci.

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“…Moreover, nutrient uptake of beech was strongly reduced in mixed culture compared with monoculture, resulting in a strong reduction of nutrient pools in the shoot and N limitation of foliar biomass production, especially under +O 3 . The presence of spruce in mixed culture may have decreased the nutrient availability to beech (Hagedorn et al 2002) suggesting yet competitive advantage of spruce below-ground. Spruce was a stronger above-ground competitor than beech in our experiment (see also Kozovits et al 2005a, b) and more eYcient in the N and P-related above-ground space occupation, supporting hypothesis (3).…”

Section: Evects Of Elevated Comentioning

confidence: 99%

“…Yet, potential eVects of the global climate change (e.g. atmospheric CO 2 /O 3 enrichment) on mineral nutrition and competitive behaviour of both tree species are rather uncertain while depending on the ontogenetic stage, genotype, soil and climatic conditions (Kolb and Matyssek 2001;Hagedorn et al 2002;Spinnler et al 2003). Mostly, nutritional analyses have been restricted to N.…”

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confidence: 99%

Nutrient contents and efficiencies of beech and spruce saplings as influenced by competition and O3/CO2 regime

et al. 2008

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Saplings of Fagus sylvatica and Picea abieswere grown under conditions of intra and interspeciWc competition in a 2-year phytotron study under combinations of ambient and elevated ozone (+O 3 which is 2 £ O 3 , but <150 nl l ¡1 ) as well as carbon dioxide concentrations (+CO 2 which is amb. CO 2 + 300 l CO 2 l ¡1 ) in a full factorial design. Saplings were analysed for various mineral nutrients in diVerent plant organs as well as biomass production and crown development. The study was based on the assumption that nutritional parameters important for growth and competitiveness are aVected by stress defence under limiting nutrient supply. The hypotheses tested were (1) that nutrient uptake-related parameters (a) as well as eYciencies in nutrient use for above-ground competition (b) of beech rather than spruce are impaired by the exposure to elevated O 3 concentrations, (2) that the eYciency in nutrient uptake of spruce is enhanced by elevated CO 2 concentrations in mixed culture, and (3) that the ability to occupy above-ground space at low nutrient cost is co-determinant for the competitive success in mixed culture. Clear nitrogen deWciencies were indicated for both species during the 2-year phytotron study, although foliar nitrogen-biomass relationships were not so close for spruce than for beech. O 3 stress did not impair nutrient uptake-related parameters of beech; thus hypothesis (1a). was not supported. A negative eVect of elevated O 3 (under amb. CO 2 ) on the N and P based eYciencies in above-ground space occupation (i.e. lower crown volume per unit of N or P invested in stems, limbs and foliage) of beech supported hypothesis (1b). It appeared that ozone stress triggered a nutrient demand for stress defence and tolerance at the expense of above-ground competition (trade-oV). Crown volume of beech under O 3 stress was stabilized in monoculture by increased nutrient uptake. In general, the +CO 2 -treatment was able to counteract the impacts of 2 £ O 3 . Elevated CO 2 caused lower N and S concentrations in current-year foliage of both tree species, slightly higher macronutrient amounts in the root biomass of spruce, but did not increase the eYciencies in nutrient uptake of spruce in mixed culture. Therefore hypothesis (2) was not supported. At the end of the experiment spruce turned out to be the stronger competitor in mixed culture as displayed by its higher total shoot biomass and crown volume. The amounts of macronutrients in the above-ground biomass of spruce individuals in mixed culture distinctly exceeded those of beech, which had been strongly reduced by interspeciWc competition. The superior competitiveness of spruce was related to higher N and P-based eYciencies in aboveground space occupation as suggested in hypothesis (3).

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“…The growth of most plants is enhanced at elevated, relative to current, levels of atmospheric CO 2 , and this enhanced growth results in greater demand for mineral nutrients (e.g., Campbell and Sage 2002;Hagedorn et al 2002). If nutrient availability or plant uptake does not increase to meet this enhanced nutrient demand, then decreases in the concentrations of nutrients will occur in at least some tissues of plants grown at elevated CO 2 .…”

Section: Introductionmentioning

confidence: 97%

Elevated CO2 affects plant responses to variation in boron availability

2011

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Aim Effects of elevated CO 2 on N relations are well studied, but effects on other nutrients, especially micronutrients, are not. We investigated effects of elevated CO 2 on response to variation in boron (B) availability in three unrelated species: seed geranium (Pelargonium x hortorum), barley (Hordeum vulgare), and water fern (Azolla caroliniana). Methods Plants were grown at two levels of CO 2 (370, 700 ppm) and low, medium, and high B. Treatment effects were measured on biomass, net photosynthesis (P n ) and related variables, tissue nutrient concentrations, and B transporter protein BOR1. Results In geranium, there were interactive effects (P< 0.05) of B and CO 2 on leaf, stem, and total plant mass, root:shoot ratio, leaf [B], B uptake rate, root [Zn], and P n . Elevated CO 2 stimulated growth at 45 μM B, but decreased it at 450 μM B and did not affect it at 4.5 μM B. P n was stimulated by elevated CO 2 only at 45 μM B and chlorophyll was enhanced only at 450 μM B. Soluble sugars increased with high CO 2 only at 4.5 and 45 μM B. High CO 2 decreased leaf [B] and B uptake rate, especially at 450 μM B. Though CO 2 and B individually affected the concentration of several other nutrients, B x CO 2 interactions were evident only for Zn in roots, wherein [Zn] decreased under elevated CO 2 . Interactive effects of B and CO 2 on growth were confirmed in (1) barley grown at 0, 30, or 1,000 μM B, wherein growth at high CO 2 was stimulated more at 30 μM B, and (2) Azolla grown at 0, 10, and 1,000 μM B, wherein growth at high CO 2 was stimulated at 0 and 10 μM B. Conclusion Thus, low and high B both may limit growth stimulation under elevated vs. current [CO 2 ], and B deficiency and toxicity, already common, may increase in the future.

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Elevated CO2 influences nutrient availability in young beech-spruce communities on two soil types

Cited by 25 publications

References 38 publications

Above- and below-ground carbon stock estimation in a natural forest of Bangladesh

Above- and below-ground carbon stock estimation in a natural forest of Bangladesh

Nutrient contents and efficiencies of beech and spruce saplings as influenced by competition and O3/CO2 regime

Elevated CO2 affects plant responses to variation in boron availability

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