Abstract
Mycorrhizal symbiosis between plant roots and mycorrhizal fungi are almost ubiquitous. These interactions contribute a largely to soil autotrophic respiration (RA), influence soil heterotrophic respiration (RH) and respond strongly to such climatic changes as temperature and precipitation. The aim of the present study was to explore how variation of temperature and precipitation influence RA and RH in global forest ecosystems that are classified by the mycorrhizal type of the dominant plants. The results show slight variation for RA and significant change for RH among different mycorrhizal strategy types. In forests with predominating arbuscular mycorrhiza (AM) the RA and RH are trifling higher than in non-AM type forests. The responses of RA and RH to temperature and precipitation were highly variable among different mycorrhizal strategies. For example, the changes of RA and RH are more dependent on precipitation than temperature in AM-forest, and temperature accounted more for their variations in forests of the other three mycorrhizal types. As far as we know, this study was the first to evaluate the influence of different mycorrhizal strategies on forest RA and RH and their response to temperature and precipitation.
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