Acknowledgements
This study is partially supported by San Diego State University.
Financial assistance was partially provided by the SPRUCE and NGEE
Arctic projects, which are supported by the Office of Biological and
Environmental Research in the Department of Energy Office of Science.
This study was partially supported by the Northeast Institute of
Geography and Agroecology, Chinese Academy of Sciences, and the “Top
Notch” program in China. C.S. is supported by the National Natural
Science Foundation of China (41125001). X.X. acknowledge the financial
support from the San Diego State University and the CSU Program for
Education & Research in Biotechnology. N.S. was supported by VIDI grant
016.161.318 issued by the Netherlands Organization of Scientific
Research.