Eddy covariance and biometric measurements show that a savanna ecosystem in Southwest China is a carbon sink

• DOI: 10.1038/srep41025
• Publication Date: 2017-02-01T11:01:21Z
• Authors: Xuehai Fei; Yanqiang Jin; Yiping Zhang; Liqing Sha; Yuntong Liu; Qinghai Song; Wenjun Zhou; Naishen Liang; Guirui Yu; Leiming Zhang; Ruiwu Zhou; Jing Li; Shubin Zhang; Peiguang Li
• Keywords: Carbon sink; Ecosystem respiration; Sink (geography); Growing season; Dry season

Abstract Savanna ecosystems play a crucial role in the global carbon cycle. However, there is gap our understanding of fluxes savanna Southeast Asia. In this study, eddy covariance technique (EC) and biometric-based method (BM) were used to determine exchange ecosystem Southwest China. The BM-based net production (NEP) was 0.96 tC ha −1 yr . EC-based estimates average annual gross primary productivity (GPP), respiration (R eco ), (NEE) 6.84, 5.54, −1.30 , respectively, from May 2013 December 2015, indicating that acted as an appreciable sink. more efficient during wet season than dry season, so it represented small sink 0.16 considerable 1.14 season. noteworthy capacity may decline future under rising temperatures decreasing rainfall. Consequently, further studies should assess how environmental factors climate change will influence carbon-water fluxes.