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Author  |
Stahl, C.; Burban, B.; Goret, J.Y.; Bonal, D. |
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Title |
Seasonal variations in stem CO(2) efflux in the Neotropical rainforest of French Guiana |
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Journal Article |
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Year |
2011 |
Publication |
Annals of Forest Science |
Abbreviated Journal |
Ann. For. Sci. |
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Volume |
68 |
Issue |
4 |
Pages |
771-782 |
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Keywords |
Tropical rainforest; Stem CO(2) efflux; Soil water content; Terra Firme forest; Seasonally flooded forest |
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Abstract |
Introduction Stem CO(2) efflux (E (s)) is a significant component of total ecosystem respiration, but there is only scant information on seasonal variations in E (s) in tropical rainforests and on the main factors explaining these variations. Methods We conducted a comprehensive 18-month study in French Guiana to try to better understand which environmental factors contribute to seasonal variations in E (s) in two habitats differing in soil water conditions. Results In both habitats, large seasonal variations in E (s) were observed for most trees. The main variations occurred during climatic transition periods and were consistent with seasonal variations in soil and total ecosystem respiration. Discussion Seasonal variations in atmospheric conditions, including air temperature, did not explain seasonal variations in E (s). In contrast, seasonal variations in surface soil water content clearly induced seasonal variations in E (s) in each habitat. Both soil drought and flooded conditions induced a decrease in E (s). Conclusion Our results emphasize the need to integrate the influence of soil water content on E (s) into global models that simulate the response of forest ecosystem fluxes to climate changes. |
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Address |
[Bonal, D] INRA, UMR INRA UHP Ecol & Ecophysiol Forestiere 1137, F-54280 Champenoux, France, Email: bonal@nancy.inra.fr |
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Springer France |
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ISSN |
1286-4560 |
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Notes |
WOS:000292553400011 |
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EcoFoG @ webmaster @ |
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327 |
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