Solar ultraviolet (UV)-A and UV-B radiation were excluded from branches of grey alder (Alnus incana) and white birch (Betula pubescens) trees in a field experiment. Leaf litter collected from these trees was used in microcosm experiments under laboratory conditions. The aim was to evaluate the effects of the different UV treatments on litter chemical quality (phenolic compounds, C, N and lignin) and the subsequent effects of these changes on soil fauna and decomposition processes. We measured the decomposition rate of litter, growth of woodlice (Porcellio scaber), soil microbial respiration and abundance of nematodes and enchytraeid worms. In addition, the chemical quality of woodlice feces was analyzed. The exclusion of both UV-A and UV-B had several effects on litter chemistry. Exclusion of UV-B radiation decreased the C content in litter in both tree species. In alder litter, UV exclusion affected concentration of phenolic groups variably, whereas in birch litter there were no significant differences in phenolic compounds. Moreover, further effects on microbial respiration and chemical quality of woodlice feces were apparent. In both tree species, microbial CO2 evolution was lower in soil with litter produced under exclusion of both UV-A and UV-B radiation when compared to soil with control litter. The N content was higher in the feces of woodlice eating alder litter produced under exclusion of both UV-A and UV-B compared to the control. In addition, there were small changes in the concentration of individual phenolic compounds analyzed from woodlice feces. Our results demonstrate that both UV-A and UV-B alter litter chemistry which in turn affects decomposition processes.
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Abrahamsen G (1973) Studies on body-volume, body-surface area, density and live weight of Enchytraeidae (Oligochaeta). Pedobiologia 13:6–15
Anttonen S, Manninen A-M, Saranpää P, Kainulainen P, Linder S, Vapaavuori E (2002) Effects of long-term nutrient optimisation on stem wood chemistry in Picea abies. Trees Struct Funct 16:386–394
Ayres MP, Clausen TP, MacLean SF, Redman AM, Reichardt PB (1997) Diversity of structure and antiherbivore activity in condensed tannins. Ecology 78:1696–1712
Bardgett RD (2005) The biology of soil. Oxford University Press, Oxford
Bassman JH (2004) Ecosystem consequences of enhanced solar ultraviolet radiation: secondary plant metabolites as mediators of multiple trophic interactions in terrestrial plant communities. Photochem Photobiol 79:382–398
Caldwell MM, Bornman JF, Ballaré CL, Flint SD, Kulandaivelu G (2007) Terrestrial ecosystems, increased solar ultraviolet radiation, and interactions with other climate change factors. Photochem Photobiol Sci 6:252–266
Convey P, Pugh PJA, Jackson C, Murray AW, Ruhland CT, Xiong FS, Day TA (2002) Response of Antarctic terrestrial microarthropods to long-term climate manipulations. Ecology 83:3130–3140
Dixon RA, Paiva NL (1995) Stress-induced phenylpropanoid metabolism. Plant Cell 7:1085–1097
Flint SD, Caldwell MM (2003a) A biological spectral weighting function for ozone depletion research with higher plants. Physiol Plant 117:137–144
Flint SD, Caldwell MM (2003b) Field testing of UV biological spectral weighting functions for higher plants. Physiol Plant 117:145–153
Gehrke C, Johanson U, Callaghan TV, Chadwick D, Robinson CH (1995) The impact of enhanced ultraviolet-B radiation on litter quality and decomposition processes in Vaccinium leaves from the subarctic. Oikos 72:213–222
Hagerman AE (1995) Tannin chemistry. Department of Chemistry, Miami University, Miami, pp 24–25
Johnson D, Campbell CD, Lee JA, Callaghan TV, Gwynn-Jones D (2002) Arctic microorganisms respond more to elevated UV-B radiation than CO2. Nature 416:82–83
Keinänen M, Julkunen-Tiitto R (1998) High-performance liquid chromatographic determination of flavonoids in Betula pendula and Betula pubescens leaves. J Chromatogr A 793:370–377
Keski-Saari S, Pusenius J, Julkunen-Tiitto R (2005) Phenolic compounds in seedlings of Betula pubescens and B. pendula are affected by enhanced UV-B radiation and different nitrogen regimens during early ontogeny. Glob Change Biol 11:1180–1194
Kotilainen T, Tegelberg R, Julkunen-Tiitto R, Lindfors A, Aphalo PJ (2008) Metabolite specific effects of solar UV-A and UV-B on alder and birch leaf phenolics. Glob Change Biol 14:1294–1304
Mazza CA, Boccalandro HE, Giordano CV, Battista D, Scopel AL, Ballaré CL (2000) Functional significance and induction by solar radiation of ultraviolet-absorbing sunscreens in field-grown soybean crops. Plant Physiol 122:117–126
Mikola J, Nieminen M, Ilmarinen K, Vestberg M (2005) Belowground responses by AM fungi and animal trophic groups to repeated defoliation in an experimental grassland community. Soil Biol Biochem 37:1630–1639
Moody S, Paul N, Björn LO, et al. (2001) The direct effects of UV-B radiation on Betula pubescens litter decomposing at four European field sites. Plant Ecol 154:27–36
Newsham KK, Anderson JM, Sparks TH, Splatt P, Woods C, McLeod AR (2001a) UV-B effect on Quercus robur leaf litter decomposition persists over four years. Glob Change Biol 7:479–483
Newsham KK, Splatt P, Coward PA, Greenslade PD, McLeod AR, Anderson JM (2001b) Negligible influence of elevated UV-B radiation on leaf litter quality of Quercus robur. Soil Biol Biochem 33:659–665
O'Connor FB (1962) The extraction of Enchytraeidae from soil. In: Murphy PW (ed) Progress in soil zoology. Butterworths, London, pp 279-285
Pancotto VA, Sala OE, Cabello M, Lopez NI, Robson TM, Ballaré CL, Caldwell MM, Scopel AL (2003) Solar UV-B decreases decomposition in herbaceous plant litter in Tierra del Fuego, Argentina: potential role of an altered decomposer community. Glob Change Biol 9:1465–1474
Pancotto VA, Sala OE, Robson TM, Caldwell MM, Scopel AL (2005) Direct and indirect effects of solar ultraviolet-B radiation on long-term decomposition. Glob Change Biol 11:1982–1989
Paul ND, Callaghan TV, Moody S, Gwynn-Jones D, Gehrke C (1999) UV-B impacts on decomposition biochemical cycling. In: Rozema J (ed) Stratospheric ozone depletion: the effects of enhanced UV-B radiation on terrestrial ecosystems. Backhuys, Leiden, pp 117–133
Pinheiro JC, Bates DM (2000) Mixed-effects models in S and S-plus. Springer, New York
R Development Core Team (2006) R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna
Raich JW, Tufekcioglu A (2000) Vegetation and soil respiration: correlations and controls. Biogeochemistry 48:71–90
Raich JW, Potter CS, Bhagawati D (2002) Interannual variation in global soil respiration, 1980–94. Glob Change Biol 8:800–812
Rinnan R, Keinanen MM, Kasurinen A, et al. (2005) Ambient ultraviolet radiation in the Arctic reduces root biomass and alters microbial community composition but has no effects on microbial biomass. Glob Change Biol 11:564–574
Robson TM, Pancotto VA, Scopel AL, Flint SD, Caldwell MM (2005) Solar UV-B influences microfaunal community composition in a Tierra del Fuego peatland. Soil Biol Biochem 37:2205–2215
Rozema J, Tosserams M, Nelissen HJM, van Heerwaarden L, Broekman RA, Flierman N (1997) Stratospheric ozone reduction and ecosystem processes: enhanced UV-B radiation affects chemical quality and decomposition of leaves of the dune grassland species Calamagrostis epigeios. Plant Ecol 128:285–294
Sarkar D (2008) Lattice: multivariate data visualization with R. Springer, New York
SCAN-CM (1994) Asetoniin liukenevan aineen määrittäminen (in Finnish). Scandinavian Pulp, Paper and Board Testing Committee 50. Central Laboratory of Finland, Espoo, Finland
Sohlenius B (1979) A carbon budget for nematodes, rotifers and tardigrades in a Swedish coniferous forest soil. Holarctic Ecol 2:30–40
van der Heijden MGA, Bardgett RD, van Straalen NM (2008) The unseen majority: soil microbes as drivers of plant diversity and productivity in terrestrial ecosystems. Ecol Lett 11:296–310
Venables WN, Ripley BD (2002) Modern applied statistics with S. Springer, New York
Zimmer M (1999) The fate and effects of ingested hydrolyzable tannins in Porcellio scaber. J Chem Ecol 25:611–628
Zimmer M, Topp W (1998) Microorganisms and cellulose digestion in the gut of the woodlouse Porcellio scaber. J Chem Ecol 24:1397–1408
Zimmer M, Topp W (2000) Species-specific utilization of food sources by sympatric woodlice (Isopoda: Oniscidea). J Anim Ecol 69:1071–1082
We thank Sinikka Sorsa for assisting with the HPLC analyses and Leena Siitonen, Nipa Manosuk, Pasi Kemppainen and Kati Sivander for assisting with the field experiment and preparing the leaf samples, and Mustafa Boucelham and Anna Repo for assisting with the decomposition experiments. We thank Sari Vilhunen and Hanna Ruhanen for assisting with the lignin and sugar concentration analyses and Matty Berg for collecting the woodlice population. We thank Emily Knott for checking the English language of the manuscript. This work was supported by the Maj and Tor Nessling Foundation (grant no. 2007046 to T. Kotilainen) and more recently also by the Academy of Finland (grant no. 116775 to P. J. Aphalo). The experiments reported here comply with the current laws of Finland.
Communicated by Stefan Scheu.
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Kotilainen, T., Haimi, J., Tegelberg, R. et al. Solar ultraviolet radiation alters alder and birch litter chemistry that in turn affects decomposers and soil respiration. Oecologia 161, 719–728 (2009). https://doi.org/10.1007/s00442-009-1413-y
- Alnus incana
- Betula pubescens
- Leaf litter decomposition
- Leaf phenolics
- Ultraviolet radiation