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Title: Changes in soil respiration components and their specific respiration along three successional forests in the subtropics

Journal Article · · Functional Ecology
 [1];  [1];  [2];  [1];  [1]
  1. Chinese Academy of Sciences, Guangzhou (China)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

1.Understanding how soil respiration components change with forest succession is critical for modelling and predicting soil carbon (C) processes and its sequestration below-ground. The specific respiration (a ratio of respiration to biomass) is increasingly being used as an indicator of forest succession conceptually based on Odum's theory of ecosystem development. However, the hypothesis that specific soil respiration declines with forest succession remains largely untested. 2.We used a trenching method to partition soil respiration into heterotrophic respiration and autotrophic respiration (RH and RA) and then evaluated the specific RH and specific RA in three successional forests in subtropical China. 3.Our results showed a clear seasonality in the influence of forest succession on RH, with no significant differences among the three forests in the dry season but a higher value in the old-growth forest than the other two forests in the wet season. RA in the old-growth forest tended to be the highest among the three forests. Both the specific RH and specific RA decreased with the progressive maturity of three forests. 4.Lastly, our results highlight the importance of forest succession in determining the variation of RH in different seasons. With forest succession, soil microbes and plant roots become more efficient to conserve C resources, which would result in a greater proportion of C retained in soils.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1261539
Journal Information:
Functional Ecology, Journal Name: Functional Ecology; ISSN 0269-8463
Publisher:
British Ecological Society; WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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Nutrient limitation of litter decomposition with long-term secondary succession: evidence from controlled laboratory experiments journal January 2020
Stand age-related effects on soil respiration in rubber plantations ( Hevea brasiliensis ) in southwest China journal July 2019
Soil respiration in a subtropical forest of southwestern China: Components, patterns and controls journal September 2018