Abstract
Environmental changes are likely to alter the chemical composition of plant tissues, including content and concentrations of secondary compounds, and thereby affect the food sources of herbivores. After 10 years of experimental increase of temperature, nutrient levels and light attenuation in a sub-arctic, alpine ecosystem, we investigated the effects on carbon based secondary compounds (CBSC) and nitrogen in one dominant deciduous dwarf shrub, Salix herbacea × polaris and two dominant evergreen dwarf shrubs, Cassiope tetragona and Vaccinium vitis-idaea throughout one growing season. The main aims were to compare the seasonal course and treatment effects on CBSC among the species, life forms and leaf cohorts and to examine whether the responses in different CBSC were consistent across compounds. The changes in leaf chemistry both during the season and in response to the treatments were higher in S. herbacea × polaris than in the corresponding current year’s leaf cohort of the evergreen C. tetragona. The changes were also much higher than in the 1-year-old leaves of the two evergreens probably due to differences in dilution and turnover of CBSC in growing and mature leaves paired with different rates of allocation. Most low molecular weight phenolics in the current year’s leaves decreased in all treatments. Condensed tannins and the tannin-to-N ratio, however, either increased or decreased, and the strength and even direction of the responses varied among the species and leaf cohorts, supporting views of influential factors additional to resource-based or developmental controls, as e.g. species specific or genetic controls of CBSC. The results indicate that there is no common response to environmental changes across species and substances. However, the pronounced treatment responses imply that the quality of the herbivore forage is likely to be strongly affected in a changing arctic environment, although both the direction and strength of the responses will be different among plant species, tissue types and substances.
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References
ACIA (2004) Impacts of a warming Arctic. Arctic Climate Impact Assessment. Cambridge Univ Press, Cambridge, pp 138
AMAP (1998) AMAP Assessment Report: Arctic Pollution Issues. Arctic Monitoring and Assessment Programme (AMAP), Oslo, pp 859
Anisimov O, Fitzharris B, Hagen JO, Jefferies R, Marchant H, Nelson F, Prowse T, Vaughan DG (2001) Polar Regions (Arctic and Antarctic). In: McCarthy JJ, Canziani OF, Leary NA, Dokken DJ, White KS (eds) Impact, Adaptations, and Vulnerability, Contribution of Working Group II to the third assessment report of the Intergovernmental Panel on Climate Change. Cambridge Univ Press, Cambridge, pp 801–841
Berenbaum MR, Zangerl AR (1992) Genetics of secondary metabolism and herbivore resistance in plants. In: Rosenthal GA (ed) Herbivores: their interaction with secondary plant metabolites. Academic Press, New York, pp 415–438
Bryant JP, Chapin FS III, Klein DR (1983) Carbon/nutrient balance of boreal plants in relation to vertebrate herbivory. Oikos 40:357–368
Burns RE (1971) Method for estimation of tannin in grain Sorghum. Agron J 63:511–512
Chapin FS III, Bret-Harte MS, Hobbie SE, Zong H (1996) Plant functional types as predictors of transient responses of arctic vegetation to global change. J Veg Sci 7:347–358
Coley PD, Bryant JP, Chapin FS III (1985) Resource availability and plant antiherbivore defense. Science 230:895–899
Fraenkel GS (1959) The raison d’être of secondary plant substances. Science 129:1466–1470
Gershenzon J (1994) The cost of plant chemical defense against herbivory: a biochemical perspective. In: Bernays EA (ed) Insect-plant interaction. CRC Press, Boca Raton, pp 105–173
Graglia E, Jonasson S, Michelsen A, Schmidt IK (1997) Effects of shading, nutrient application and warming on leaf growth and shoot densities of dwarf shrubs in two arctic-alpine plant communities. Ecoscience 4:191–198
Graglia E, Jonasson S, Michelsen A, Schmidt IK, Havström M, Gustavsson L (2001) Effects of environmental perturbations on abundance of subarctic plants after three, seven, and ten years of treatments. Ecography 24:5–12
Hamilton JG, Zangerl AR, DeLucia EH, Berenbaum MR (2001) The carbon-nutrient balance hypothesis: its rise and fall. Ecol Lett 4:86–95
Harborne JB (1997) Role of phenolic secondary metabolites in plants and their degradation in the nature. In: Cadisch G, Giller KE (eds) Driven by nature: Plant litter quality and decomposition. CAB International, Wallingford, pp 67–74
Hättenschweiler S, Vitousek PM (2000) The role of polyphenols in terrestrial ecosystem nutrient cycling. Trend Ecol Evol 15:238–243
Haukioja E, Ossipov V, Koricheva J, Honkanen T, Larsson S, Lempa K (1998) Biosynthetic origin of carbon-based secondary compounds: cause of variable responses of woody plants to fertilization? Chemoecology 8:133–139
Havström M, Callaghan TV, Jonasson S (1993) Differential growth responses of Cassiope tetragona, an arctic dwarf-shrub, to environmental perturbations among three contrasting high and sub-arctic sites. Oikos 66:389–402
Herms DA, Mattson WJ (1992) The dilemma of plants: to grow or defend. Q Rev Biol 67:283–335
Horner JD, Gosz JR, Cates RG (1988) The role of carbon-based plant secondary metabolites in decomposition in terrestrial ecosystems. Am Nat 132:869–883
IPCC (2001) Third assessment report. Summary for policymakers. A report of working group I of the Intergovernmental Panel on Climate Change. Cambridge Univ Press, Cambridge
Jefferies RL, Klein DR, Shaver GR (1994) Herbivores and northern plant communities: reciprocal influences and responses. Oikos 71:193–206
Jonasson S, Bryant JP, Chapin FS III, Andersson M (1986) Plant phenols and nutrients in relation to variations in climate and rodent grazing. Am Nat 128:394–408
Jonasson S, Michelsen A, Schmidt IK, Nielsen EV (1999) Responses in microbes and plants to changed temperature, nutrient and light regimes in the Arctic. Ecology 80:1828–1843
Jones CG, Hartley SE (1999) A protein competition model of phenolic allocation. Oikos 86:27–44
Julkunen-Tiitto R, Sorsa S (2001) Testing the effects of drying methods on willow flavonoids, tannins, and salicylates. J Chem Ecol 27:779–789
Julkunen-Tiitto R, Rousi M, Bryant JP, Sorsa S, Keinänen M, Sikanen H (1996) Chemical diversity of several Betulaceae species: comparison of phenolics and terpenoids in nothern birch stems. Trees 11:16–22
Keinänen M, Julkunen-Tiitto R, Mutikainen P, Walls M, Ovaska J, Vapaavuori E (1999) Trade-offs in phenolic metabolism of silver birch: Effects of fertilization, defoliation, and genotype. Ecology 80:1970–1986
Kleiner KV, Raffa KF, Dickson RE (1999) Partitioning of 14 C-labeled photosynthate to allelochemicals and primary metabolites in source and sink leaves of aspen: evidence for secondary metabolite turnover. Oikos 119:408–418
Koricheva J (1999) Interpreting phenotypic variation in plant allelochemistry: problems with the use of concentrations. Oecologia 119:467–473
Koricheva J (2002) The carbon-nutrient balance hypothesis is dead; long live the carbon-nutrient balance hypothesis? Oikos 98:537–539
Koricheva J, Larsson S, Haukioja E, Keinänen M (1998) Regulation of woody plant secondary metabolism by resource availability: hypothesis testing by means of meta-analysis. Oikos 83:212–226
Kuokkanen K, Julkunen-Tiitto R, Keinänen M, Niemelä P, Tahvanainen J (2001) The effect of elevated CO2 and temperature on the secondary chemistry of Betula pendula seedlings. Trees 15:378–384
Lavola A (1998) Accumulation of flavonoids and related compounds in birch induced by UV-B irradiance. Tree Physiol 18:53–58
Lavola A, Julkunen-Tiitto R (1994) The effect of elevated carbon dioxide and fertilization on primary and secondary metabolites in birch, Betula pendula (Roth). Oecologia 99:315–321
Lavola A, Julkunen-Tiitto R, Aphalo P, de la Rosa T M, Lehto T (1997) The effect of UV-B radiation on UV-absorbing secondary metabolites in birch seedlings grown under simulated forest soil conditions. New Phytol 137:617–621
Loomis WE (1932) Growth-differentiation balance vs carbohydrate-nitrogen ratio. Proc Am Soc Hort Sci 29:240–245
Lorio PL (1986) Growth-differentiation balance: a basis for understanding southern pine beetle-tree interactions. For Ecol Manag 14:259–273
Michelsen A, Jonasson S, Sleep D, Havström M, Callaghan TV (1996) Shoot biomass, δ13 C, nitrogen and chlorophyll responses of two arctic dwarf shrubs to in situ shading, nutrient application and warming simulating climate change. Oecologia 105:1–12
Nadelhoffer KJ, Giblin AE, Shaver GR, Linkins AE (1992) Microbial processes and plant nutrient availability in arctic soils. In: Chapin FS III, Jefferies RL, Reynolds JF, Shaver GR, Svoboda J (eds) Arctic ecosystems in a changing climate. An ecophysiological perspective. Academic Press, San Diego, pp 281–300
Peñuelas J, Estiarte M (1998) Can elevated CO2 affect secondary metabolism and ecosystem function? Trend Ecol Evol 13:20–24
Reichardt PB, Chapin FS, III Bryant JP, Mattes BR, Clausen TP (1991) Carbon/nutrient balance as a predictor of plant defense in Alaskan balsam poplar: Potential importance of metabolite turnover. Oecologia 88:401–406
de la Rosa TM, Julkunen-Tiitto R, Lehto T, Aphalo P (2000) Secondary metabolites and nutrient concentrations in silver birch seedlings under five levels of daily UV-B exposure and two relative nutrient addition rates. New Phytol 150:121–131
Seigler DS (1998) Tannins. In: Seigler DS (ed) Plant secondary metabolism. Kluwer Acad Publ, Boston, pp 151–192
Stamp N (2003) Out of the quagmire of plant defense hypotheses. Q Rev Biol 78:23–55
Statistical Analysis Systems Institute (1999) SAS/STAT Users Guide, Release 8.02. SAS Institute, Cary, NC, USA
Tuomi J, Niemelä P, Haukioja E, Sirén S, Neuvonen S (1984) Nutrient stress: an explanation for plant anti-herbivore responses to defoliation. Oecologia 61:208–210
Veteli TO, Kuokkanen K, Julkunen-Tiitto R, Roininen, H, Tahvanainen J (2002) Effects of elevated CO2 and temperature on plant growth and herbivore defensive chemistry. Global Ch Biol 8:1240–1252
Waterman PG, Mole S (1994) Analysis of phenolic plant metabolites. Blackwell Scientific Publications, Oxford, pp 66–103
Wood CD, Tiwari BN, Plumb VE, Powell CJ, Roberts BT, Sirimane VDP, Rossiter JT, Gill M (1994) Interspecies differences and variability with time of protein precipitation activity of extractable tannins, crude protein, ash, and dry matter content of leaves from 13 species of Nepalese fodder trees. J Chem Ecol 20:3149–31
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The research was funded by the Danish Natural Science Research Council, the Nordic Council of Minister’s Nordic Arctic Research Programme, the Fiedler scholarship and a scholarship from Abisko Scientific Research Station. Karina E. Clemmensen was kind enough to assist in the fieldwork.
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Hansen, A.H., Jonasson, S., Michelsen, A. et al. Long-term experimental warming, shading and nutrient addition affect the concentration of phenolic compounds in arctic-alpine deciduous and evergreen dwarf shrubs. Oecologia 147, 1–11 (2006). https://doi.org/10.1007/s00442-005-0233-y
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DOI: https://doi.org/10.1007/s00442-005-0233-y