Precipitation frequency controls interannual variation of soil respiration by affecting soil moisture in a subtropical forest plantation
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Forest ecology study of precipitation frequency and interannual soil respiration; the object is an ecosystem process.
This ecological study examines soil respiration and precipitation in a forest plantation, not research itself.
Forest ecology study of soil respiration and precipitation; environmental domain.
Résumé
Despite the significance of interannual variation of soil respiration (R S ) for understanding long-term soil carbon dynamics, factors that control the interannual variation of R S have not been sufficiently investigated. Interannual variation of R S was studied using a 6-year data set collected in a subtropical plantation dominated by an exotic species, slash pine (Pinus elliottii Engelm.), in China. The results showed that seasonal variation of R S was significantly affected by soil temperature and soil water content (SWC). R S in the dry season (July–October) was constrained by seasonal drought. Mean annual R S was estimated to be 736 ± 30 g C·m –2 ·year –1 , with a range of 706–790 g C·m –2 ·year –1 . Although this forest was characterized by a humid climate with high precipitation (1469 mm·year –1 ), the interannual variation of R S was attributed to the changes of annual mean SWC (R 2 = 0.66, P = 0.03), which was affected by annual rainfall frequency (R 2 = 0.80, P < 0.01) and not rainfall amount (P = 0.84). Consequently, precipitation pattern indirectly controlled the interannual variation of R S by affecting soil moisture in this subtropical forest. In the context of climate change, interannual variation of R S in subtropical ecosystems is expected to increase because of the predicted changes of precipitation regime.
Conservé avec la notice de tri, où il sert de preuve aux étiquettes ci-dessus.
La notice
- Revue
- Canadian Journal of Forest Research
- Thématique
- Soil and Unsaturated Flow
- Domaine
- Engineering
- Établissements canadiens
- —
- Organismes subventionnaires
- National Key Research and Development Program of ChinaMinistry of Science and Technology of the People's Republic of ChinaChinese Academy of SciencesNational Natural Science Foundation of China
- Mots-clés
- Environmental sciencePrecipitationSubtropicsSoil respirationWater contentSoil waterSlash PineHumid subtropical climateContext (archaeology)AgronomyAtmospheric sciencesForestryPinus <genus>EcologySoil scienceBiologyGeographyBotanyGeology
- Résumé présent dans OpenAlex
- oui