Journal article
Reduced throughfall decreases autotrophic respiration, but not heterotrophic respiration in a dry temperate broadleaved evergreen forest
N Hinko-Najera, B Fest, SJ Livesley, SK Arndt
Agricultural and Forest Meteorology | Published : 2015
Abstract
Climate change may have major implications on soil respiration dynamics and the carbon sink strength of forest soils. To assess the effect of climate change on soil respiration (RS), it is crucial to understand individual responses of autotrophic (RA) and heterotrophic (RH) components. We investigated the effect of continuously (20 months) reduced throughfall (TFR, -40%) and the influence of seasonal changes in soil temperature and moisture on RS, RA and RH, partitioned by root exclusion, in a dry temperate broadleaved evergreen eucalypt forest in south-eastern Australia. TFR decreased mean RS from 4.7±0.1 (Control) to 3.8±0.1 (TFR) μmolCO2m-2s-1 (-19%). TFR indicated a strong decrease in RA..
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Grants
Awarded by Australian Research Council
Funding Acknowledgements
The study was supported by funding from the Terrestrial Ecosystem Research Network (TERN) Australian Supersite Network, the TERN OzFlux Network, the Australian Research Council (ARC) grants LE0882936 and DP120101735 and the Victorian Department of Environment and Primary Industries Integrated Forest Ecosystem Research program. We would like to thank Dr. Christina Schadel for her valuable comments to the manuscript. We also would like to thank the many internship students, especially from the Institut Polytechnique LaSalle Beauvais, Dr. Xin Kun and Julio Najera, who helped us with field data collection and in the laboratory, and Dr. Ian Gordon, Rachel Sore and Dr. Markus Low for their advice in statistical analyses.