NDLI: Soil Carbon Dioxide Fluxes from Three Forest Types of the Tropical Montane Rainforest on Hainan Island, China

Content Provider	Springer Nature Link
Author	Jiang, Xinhua Chen, Huai Peng, Changhui Li, Yide He, Yixin Chen, Dexiang Lin, Mingxian Hu, Ji Ma, Tianli Liu, Liangfeng Liu, Xinwei Xia, Miao Liu, Yinggao
Copyright Year	2016
Abstract	Tropical forests play an important role in carbon cycle. However, the temporal and spatial variation in soil carbon dioxide (CO$_{2}$) emission of tropical forest remains uncertain, especially near the Tropic of Cancer. In this research, we studied the annual soil CO$_{2}$ fluxes from three tropical montane rainforests on the Hainan Island of China (pristine montane rainforest, PF; secondary montane rainforest, SF; and Podocarpus imbricatus plantation, PP). The results showed a lower annual average soil CO$_{2}$ flux as 6.85 ± 0.52 Mg C-CO$_{2}$ ha$^{−1}$ (9.17 Mg C-CO$_{2}$ ha$^{−1}$ in the wet season and 4.50 Mg C-CO$_{2}$ ha$^{−1}$ in the dry season). The CO$_{2}$ fluxes exhibited obviously seasonal variation during the study period. Among the three forest types, PF had the highest average CO$_{2}$ flux rate of 317.77 ± 147.71 mg CO$_{2}$ m$^{−2}$ h$^{−1}$ (433.08 mg CO$_{2}$ m$^{−2}$ h$^{−1}$ in the wet season and 202.47 mg CO$_{2}$ m$^{−2}$ h$^{−1}$ in the dry season), followed by PP of 286.84 ± 137.48 mg CO$_{2}$ m$^{−2}$ h$^{−1}$ (367.12 mg CO$_{2}$ m$^{−2}$ h$^{−1}$ in the wet season and 206.56 mg CO$_{2}$ m$^{−2}$ h$^{−1}$ in the dry season) and SF of 255.09 ± 155.26 mg CO$_{2}$ m$^{−2}$ h$^{−1}$ (351.48 mg CO$_{2}$ m$^{−2}$ h$^{−1}$ in the wet season and 155.71 mg CO$_{2}$ m$^{−2}$ h$^{−1}$ in the dry season). We found between CO$_{2}$ fluxes and soil temperature a highly significant linear relation (P < 0.01) at 5 cm depth and a highly significant exponential correlation (P < 0.01) at 10 cm depth for all three forest types; a significant linear relation (P < 0.05) between CO$_{2}$ fluxes and soil moisture content was found for SF and PF, but not for PP (P > 0.05). The CO$_{2}$ flux was significantly correlated (P < 0.05) with water-filled pore space only for PF. In conclusion, our results suggested soil CO$_{2}$ fluxes in the three forest types that exhibit obviously spatial and temporal variation, and the temperature is the major factor affecting soil CO$_{2}$ fluxes from this region.
Starting Page	1
Ending Page	14
Page Count	14
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	227
Issue Number	6
e-ISSN	15732932
Language	English
Publisher	Springer International Publishing
Publisher Date	2016-05-27
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Tropical montane rainforest Plantation Soil CO$_{2}$ fluxes Soil temperature Temporal and spatial variation Environment Water Quality/Water Pollution Atmospheric Protection/Air Quality Control/Air Pollution Soil Science & Conservation Hydrogeology Climate Change/Climate Change Impacts
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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