Oecologia

, Volume 182, Issue 1, pp 287–297

Forest composition modifies litter dynamics and decomposition in regenerating tropical dry forest

  • Erik M. Schilling
  • Bonnie G. Waring
  • Jonathan S. Schilling
  • Jennifer S. Powers
Ecosystem ecology – original research

DOI: 10.1007/s00442-016-3662-x

Cite this article as:
Schilling, E.M., Waring, B.G., Schilling, J.S. et al. Oecologia (2016) 182: 287. doi:10.1007/s00442-016-3662-x

Abstract

We investigated how forest composition, litter quality, and rainfall interact to affect leaf litter decomposition across three successional tropical dry forests in Costa Rica. We monitored litter stocks and bulk litter turnover in 18 plots that exhibit substantial variation in soil characteristics, tree community structure, fungal communities (including forests dominated by ecto- or arbuscular mycorrhizal host trees), and forest age. Simultaneously, we decomposed three standard litter substrates over a 6-month period spanning an unusually intense drought. Decay rates of standard substrates depended on the interaction between litter identity and forest type. Decomposition rates were correlated with tree and soil fungal community composition as well as soil fertility, but these relationships differed among litter types. In low fertility soils dominated by ectomycorrhizal oak trees, bulk litter turnover rates were low, regardless of soil moisture. By contrast, in higher fertility soils that supported mostly arbuscular mycorrhizal trees, bulk litter decay rates were strongly dependent on seasonal water availability. Both measures of decomposition increased with forest age, as did the frequency of termite-mediated wood decay. Taken together, our results demonstrate that soils and forest age exert strong control over decomposition dynamics in these tropical dry forests, either directly through effects on microclimate and nutrients, or indirectly by affecting tree and microbial community composition and traits, such as litter quality.

Keywords

Costa Rica Drought Edaphic gradients Soil fungi Succession 

Supplementary material

442_2016_3662_MOESM1_ESM.docx (346 kb)
Supplementary material 1 (DOCX 346 kb)

Funding information

Funder NameGrant NumberFunding Note
National Science Foundation
  • 1053237

Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Erik M. Schilling
    • 1
  • Bonnie G. Waring
    • 1
  • Jonathan S. Schilling
    • 2
    • 3
  • Jennifer S. Powers
    • 1
    • 4
  1. 1.Department of Ecology, Evolution and BehaviorUniversity of MinnesotaSaint PaulUSA
  2. 2.Bioproducts and Biosystems EngineeringUniversity of MinnesotaSaint PaulUSA
  3. 3.Institute on the EnvironmentUniversity of MinnesotaSaint PaulUSA
  4. 4.Department of Plant BiologyUniversity of MinnesotaSaint PaulUSA

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