Abstract
Different components of functional biodiversity, such as functional type richness and composition, have been reported to affect the decomposition of litter mixtures. In spite of the numerous reports of these effects, mechanisms underlying patterns of decomposition in litter mixtures are still unclear. We analyzed whether mixture decomposition was affected by: (a) the number of species in the mixture (mixture richness); and (b) the mixture’s functional composition (% of fast- vs. slow-decomposing species included in the mixture). We then tested if variation between observed and expected values of decomposition in mixtures was associated to: (c) the initial litter characteristics of the component species (initial nitrogen, lignin, cellulose and hemicellulose content of litters); and (d) the chemical heterogeneity of the mixtures (variation in the same chemical compounds between the components in each mixture). When up to 5 species representing different functional types were included, both species richness and functional composition showed statistically significant non-additive, and in general positive, effects on litter mixture decomposition. The positive effect of mixture richness on decomposition did not disappear, but was much less marked, when considering mixture with slow-decomposing species only. Although the main driver of decomposition in a mixture is still the average decomposability of the component species (itself largely determined by litter quality), the species interactions in a mixture add a consistent source of variability that is worth considering when predicting the decomposability of a given mixture. We showed that a greater positive difference between observed decomposition rates and that expected from its component species alone was found in mixtures with higher mean nitrogen content and a higher heterogeneity in non-labile compounds. Our results offer quantitative proof that litter chemical heterogeneity, as well as the mean quality of the mixture, can affect the decomposability in litter mixtures.
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References
Anderson JM, Hetherington SL (1999) Temperature, nitrogen availability and mixture effects on the decomposition of heather (Calluna vulgaris (L.) Hull) and bracken (Pteridium aquilinum (L.) Kuhn) litters. Func Ecol 13:116–124
Bardgett RD, Shine A (1999) Linkages between plant litter diversity, soil microbial biomass and ecosystem function in temperate grassland. Soil Biol Biochem 31:317–321
Blair JM, Parmelee RW, Beare MH (1990) Decay rates, nitrogen fluxes and decomposer communities in single and mixed-species foliar litter. Ecol 71:1976–1985
Cadisch G, Giller KE (1997) Driven by nature: plant litter quality and decomposition. CAB International-University Press, Cambridge, p 409
Cornelissen JHC (1996) An experimental comparison of leaf decomposition rates in a wide range of temperate plant species and types. J Ecol 84:573–582
Cornelissen JHC, Pérez Harguindeguy N, Díaz S, Grime JP, Marzano B, Cabido M, Vendramini F, Cerabolini B (1999) Leaf structure and defence control litter decomposition rate across species and life forms in regional floras of two continents. New Phytol 143:191–200
De Fina AL (1992) Aptitud agroclimática de la República Argentina. Academia Nacional de Agronomía y Veterinaria, pp 427
Díaz S, Cabido M (1997) Plant functional types and ecosystem function in relation to global change. J Veg Sci 8:463–474
Draper NR, Smith H (1998) Applied regression analysis, 3rd edn. Wiley, New York
Gartner TB, Cardon ZG (2004) Decomposition dynamics in mixed-species leaf litter a review. Oikos 104:230–246
Goering HK, Van Soest PJ (1970) Forage fiber analyses. Handbook No. 379. Department of Agriculture, USDA, Washington, DC, 20, p 31
Hättenschwiller S, Vitousek PM (2000) The role of polyphenols in terrestrial ecosystem nutrient cycling. Trends Ecol Evol 15:238–243
Hättenschwiller S, Tiunov AV, Scheu S (2005) Biodiversity and litter decomposition in terrestrial ecosystems. Ann Rev Ecol Evol Syst 36:191–218
Hector A, Beale AJ, Minns A, Otway SJ, Lawton JH (2000) Consequences of the reduction of plant diversity for litter decomposition: effects through litter quality and microenvironment. Oikos 90:357–371
Hooper DU, Vitousek PM (1997) The effects of plant composition and diversity in ecosystem processes. Science 277:1302–1305
Hooper DU, Chapin FS III, Ewel JJ, Hector A, Inchausti P, Lavorel S, Lawton JH, Lodge DM, Loreau M, Naeem S, Schmid B, Setälä H, Symstad AJ, Vandermeer J, Wardle DA (2005) Effects of biodiversity on ecosystem functioning: a consensus of current knowledge and needs for future research. Ecol Monogr 75:3–35
Hoorens B, Aerts R, Stroetenga M (2002) Litter quality and interactive effects in litter mixtures: more negative interactions under elevated CO2? J Ecol 90:1009–1016
Hoorens B, Aerts R, Stroetenga M (2003) Does initial litter chemistry explain litter mixture effects on decomposition? Oecologia 442:578–586
InfoStat (2002) InfoStat versión 1.1. Grupo InfoStat, FCA, Universidad Nacional de Córdoba, Córdoba, Argentina
Knops JMH, Wedin D, Tilman D (2001) Biodiversity and decomposition in experimental grassland ecosystems. Oecologia 126:429–433
Loreau M, Naeem S, Inchausti P (2002) Biodiversity and ecosystem functioning: synthesis and perspectives. Oxford University Press, Oxford, p 294
McNaughton SJ, Oesterheld M, Frank DA, Williams KJ (1989) Ecosystem- level patterns of primary productivity and herbivory in terrestrial habitats. Nature 341:142–144
McTiernan KB, Ineson P, Coward PA (1997) Respiration and nutrient release from tree leaf litter mixtures. Oikos 78:527–538
Pérez Harguindeguy N, Díaz S, Cornelissen JHC, Vendramini F, Cabido M, Castellanos A (2000) Chemistry and toughness predict leaf litter decomposition rates over a wide spectrum of functional types and taxa in central Argentina. Plant and Soil 218:21–30
Quested HM, Callaghan TV, Cornelissen JHC, Press M (2005) The impact of hemiparasitic plant litter on decomposition: direct, seasonal and litter mixing effects. J Ecol 93:87–98
Seastedt TR (1984) The role of microarthropods in decomposition and mineralization process. Ann Rev Entomol 29:25–46
Smith VC, Bradford MA (2003) Do non-additive effects on decomposition in letter-mix experiments result from differences in resource quality between litters? Oikos 102:235–242
Sokal RR, Rohlf FJ (1995) Biometry – the principles and practice of statistics in biological research, 3rd edn. Freeman, New York, p 887
Vaieretti MV, Pérez Harguindeguy N, Gurvich DE, Cingolani AM, Cabido M (2005) Decomposition dynamics and physico-chemical leaf quality of abundant species in a montane woodland in central Argentina. Plant Soil 278:223–234
Wardle DA, Bonner KI, Barker GM (1997) Biodiversity and plant litter: experimental evidence which does not support the view that enhanced species richness improves ecosystem function. Oikos 79:247–258
Wardle DA, Bardgett RD, Klironomos JN, Setälä H, van der Putten WH, Wall DH (2004) Ecological linkages between aboveground and belowground biota. Science 304:1629–163
Zak MR, Cabido M (2002) Spatial patterns of the Chaco vegetation of central Argentina: Integration of remote sensing and phytosociology. App Veg Sci 5:213–226
Acknowledgements
We are grateful to our research team, in particular to A.M. Cingolani for constant support and useful discussions and to D. Abal-Solis for drawing the graphs. Universidad Nacional de Córdoba, CONICET, Agencia Córdoba Ciencia S.E., SECyT-UNC, Inter-American Institute for Global Change Research CRN 2015 (which is supported by the US National Science Foundation-Grant GEO-0452325), and FONCyT supported our research. We thank the Domínguez Family for allowing us to use their property to perform our research. We would further like to thank David Wardle, Fabien Quétier, and two anonymous reviewers for constructive comments on an earlier version of this manuscript.
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Pérez Harguindeguy, N., Blundo, C.M., Gurvich, D.E. et al. More than the sum of its parts? Assessing litter heterogeneity effects on the decomposition of litter mixtures through leaf chemistry. Plant Soil 303, 151–159 (2008). https://doi.org/10.1007/s11104-007-9495-y
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DOI: https://doi.org/10.1007/s11104-007-9495-y