Abstract
We examined the effects of soil mesofauna and the litter decomposition environment (above and belowground) on leaf decomposition rates in three forest types in southeastern Brazil. To estimate decomposition experimentally, we used litterbags with a standard substrate in a full-factorial experimental design. We used model selection to compare three decomposition models and also to infer the importance of forest type, decomposition environment, mesofauna, and their interactions on the decomposition process. Rather than the frequently used simple and double-exponential models, the best model to describe our dataset was the exponential deceleration model, which assumed a single organic compartment with an exponential decrease of the decomposition rate. Decomposition was higher in the wet than in the seasonal forest, and the differences between forest types were stronger aboveground. Regarding litter decomposition environment, decomposition was predominantly higher below than aboveground, but the magnitude of this effect was higher in the seasonal than in wet forests. Mesofauna exclusion treatments had slower decomposition, except aboveground into the Semi-deciduous Forest, where the mesofauna presence did not affect decomposition. Furthermore, the effect of mesofauna was stronger in the wet forests and belowground. Overall, our results suggest that, in a regional scale, both decomposers activity and the positive effect of soil mesofauna in decomposition are constrained by abiotic factors, such as moisture conditions.
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References
Adair EC, Parton WJ, Delgrosso SJ, Silver WL, Harmon ME, Hall SA, Burke IC, Hart SC (2008) Simple three-pool model accurately describes patterns of long-term litter decomposition in diverse climates. Global Change Biol 14:2636–2660
Aerts R (1997) Climate, leaf litter chemistry and leaf litter decomposition in terrestrial ecosystems: a triangular relationship. Oikos 79:439–449
Ayres E, Steltzer H, Simmons BL, Simpson RT, Steinweg JM, Wallenstein MD, Mellor N, Parton WJ, Moore JC, Wall DH (2009) Home field advantage accelerates leaf litter decomposition in forests. Soil Biol Biochem 41:606–610
Bardgett RD, Bowman WD, Kaufmann R, Schmidt SK (2005) A temporal approach to linking aboveground and belowground ecology. Trends Ecol Evol 20:634–641
Bolker B and R Development Core Team (2012) bbmle: tools for general maximum likelihood estimation. R package version 1.0.4.1. http://CRAN.R-project.org/package=bbmle
Burnham KP, Anderson DR (2002) Model selection and multimodel inference: a practical information-theoretical approach. Springer-Verlag, New York
Castanho CT, Oliveira AA (2008) Relative effects of litter quality, forest type and their interaction on leaf decomposition in southeastern Brazilian forests. J Trop Ecol 24:149–156
Cusack D, Chou WW, Yang WH, Harmon ME, Silver WL, LIDET Team (2009) Controls on long-term root and leaf litter decomposition in neotropical forest. Global Change Biol 15:1339–1355
Davidson ED, Verchot LV, Cattânio JH, Ackerman IL, Carvalho JEM (2000) Effects of soil water content on soil respiration in forests and cattle pastures of eastern Amazonia. Biogeochemistry 48:53–69
Epstein HE, Burke IC, Lauenroth WK (2002) Regional patterns on decomposition and primary production rates in the US great plains. Ecology 83:320–327
Fragoso C, Lavelle P (1992) Earthworm communities of tropical rain forests. Soil Biol Biochem 24:1397–1408
Gholz HL, Wedin DA, Smitherman SM, Harmon ME, Parton WJ (2000) Long-term dynamics of pine and hardwood litter in contrasting environments: toward a global model of decomposition. Global Change Biol 6:751–765
Gonzalez G, Seastedt TR (2001) Soil fauna and soil litter decomposition in tropical and subalpine forests. Ecology 82:955–964
Harmon M, Nadelhoffer K, Blair J (1999) Measuring decomposition, nutrient turnover, and stores in plant litter. In: Robertson G, Bledsoe C, Coleman D, Sollins P (eds) Standard methods for long-term ecological research. Oxford University Press, New York, pp 202–240
Jassal RS, Black TA, Novak MD, Gaumont-Guay D, Nesic Z (2008) Effect of soil water stress on soil respiration and its temperature sensitivity in an 18-year-old temperate Douglas-fir stand. Global Change Biol 14:1–14
Jenny H, Gessel SP, Bingham FT (1949) Comparative study of decomposition rates of organic matter in temperate and tropical regions. Soil Sci 68:419–432
Jordan CF, Herrera R (1981) Tropical rain forests: are nutrients really critical? Am Nat 117:167–180
Lavelle P, Blanchart E, Martin A, Martin S, Spain A, Toutain F, Barois I, Schafer R (1993) A hierarchical model for decomposition in terrestrial ecosystems: applications to soils of the humid tropics. Biotropica 25:130–150
Lousier JD, Parkson D (1976) Litter decomposition in a cool temperate deciduous forest. Can J Ecol 54:419–436
Melillo JM, Aber JD, Linkins AE, Ricca A, Fry B, Nadelhoffer KJ (1989) Carbon and nitrogen dynamics along the decay continuum: plant litter to soil organic matter. Plant Soil 115:189–198
Montagnini F, Jordan C (2002) Reciclaje de nutrientes. In: Kattan GH, Guariguata MR (eds) Ecologia y conservación de bosques neotropicales. Ediciones LUR, Cartago, pp 591–623
Olson JS (1963) Energy storage and the balance of producers and decomposers in ecological systems. Ecology 44:322–331
Paul EA, Clark FE (1989) Soil Microbiology and Biochemistry. Academic Press, San Diego
Powers JS et al (2009) Decomposition in tropical forests: a pan-tropical study of the effects of litter type, litter placement and mesofaunal exclusion across a precipitation gradient. J Ecol 97:801–811
R Development Core Team (2012) R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. http://www.R-project.org. ISBN 3-900051-07-0
Rovira P, Rovira R (2010) Fitting litter decomposition datasets to mathematical curves: towards a generalized exponential approach. Geoderma 155:329–343
Rovira P, Kurz-Besson C, Coûteaux MM, Vallejo VR (2008) Changes in litter properties during decomposition: a study by differential thermogravimetry and scanning calorimetry. Soil Biol Biochem 40:172–185
Ruggiero PGC, Batalha MA, Pivello VR, Meirelles ST (2002) Soil-vegetation relationships in cerrado (Brazilian savanna) and semideciduous forest, southeastern Brazil. Plant Ecol 160:1–16
Salimon CI, Davidson EA, Victoria RL, Melo AWF (2004) CO2 flux from soil in pastures and forests in southwestern Amazonia. Global Change Biol 10:833–843
Seastedt TR (1984) The role of microarthropods in decomposition and mineralization processes. Annu Rev Entomol 29:25–46
Smith AC, Bhattib JS, Chenc H, Harmond ME, Arpa PA (2011) Modelling above- and below-ground mass loss and N dynamics in wooden dowels (LIDET) placed across North and Central America biomes at the decadal time scale. Ecol Model 222:2276–2290
Swift MJ, Heal OW, Anderson JM (1979) Decomposition in terrestrial ecosystems. Blackwell, Oxford
Veloso HP (1992) Sistema fitogeográfico. In: Veloso HP (ed) Manual Técnico da Vegetação Brasileira. Séries Manuais Técnicos em Geociências, Instituto Brasileiro de Geografia e Estatística, Rio de Janeiro, pp 9–38
Vitousek PM, Sanford RL Jr (1986) Nutrient cycling in moist tropical forest. Ann Rev Ecol Syst 17:137–167
Wall DH, Bradford MA, ST Johnz MG et al (2008) Global decomposition experiment shows soil animal impacts on decomposition are climate-dependent. Global Change Biol 14:2661–2677
Wieder RK, Lang GE (1982) A critique of the analytical methods used in examining decomposition data obtained from litter bags. Ecology 63:1636–1642
Acknowledgments
We acknowledge the financial support for the fieldwork provided by grant 1999/096355-0 from the São Paulo Research Foundation, as part of the BIOTA-FAPESP, the Biodiversity Virtual Institute Program, coordinated by Ricardo Ribeiro Rodrigues. The master’s degree scholarship for the first author was provided by CAPES (Coordination of the Improvement of High Level Personnel). We especially thank Kyle E. Harms for his helpful comments on an earlier version of this manuscript, and both the anonymous reviewers for their useful comments.
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Castanho, C.T., Lorenzo, L. & de Oliveira, A.A. The importance of mesofauna and decomposition environment on leaf decomposition in three forests in southeastern Brazil. Plant Ecol 213, 1303–1313 (2012). https://doi.org/10.1007/s11258-012-0089-2
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DOI: https://doi.org/10.1007/s11258-012-0089-2