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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Effect of Simulated Climate Change on Soil Respiration in a Mediterranean-Type Ecosystem: Rainfall and Habitat Type are More Important than Temperature or the Soil Carbon Pool
Authors: Matias, Luis
Castro, Jorge
Zamora, Regino
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Keywords: CO2
climate change
microbial biomass
soil carbon
Issue Date: Mar-2012
Publisher: Springer
Citation: Matias L, Castro J & Zamora R (2012) Effect of Simulated Climate Change on Soil Respiration in a Mediterranean-Type Ecosystem: Rainfall and Habitat Type are More Important than Temperature or the Soil Carbon Pool, Ecosystems, 15 (2), pp. 299-310.
Abstract: Soil respiration (R S) is known to be highly sensitive to different environmental factors, such as temperature, precipitation, and the soil carbon (C) pool. Thus, the scenario of global change expected for the coming decades might imply important consequences for R S dynamics. In addition, all of these factors may have an interactive effect, and the consequences are often confounded. We performed a field experiment to analyze the effect of soil moisture and habitat type on R S in a Mediterranean-type ecosystem by simulating three possible climate scenarios differing in the precipitation amount during summer (drier, wetter, and current precipitation pattern) in the main successional habitats in the area (forest, shrubland, and open habitat). We also considered other factors that would affect R S, such as the soil C pool and microbial biomass. By the use of structural-equation modeling (SEM), we disentangled the interactive effects of the different factors affecting R S. A higher simulated precipitation boosted R S for the different habitats across the sampling period (14.6% higher respect to control), whereas the more severe simulated drought reduced it (19.2% lower respect to control), a trend that was similar at the daily scale. Temperature had, by contrast, scant effects on R S. The SEM analysis revealed a positive effect of moisture and canopy cover on R S, whereas the effect of temperature was weaker and negative. Soil C pool and microbial biomass did not affect R S. We conclude that the precipitation changes expected for the coming decades would play a more important role in controlling R S than would other factors. Thus, the projected changes in the precipitation pattern may have much more profound direct effects on R S than will the projected temperature increases.
Type: Journal Article
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Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Biological and Environmental Sciences
Universidad de Granada, Spain
Universidad de Granada, Spain

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