Welcome to Chinese Journal of Applied Ecology! Today is Share:

Chinese Journal of Applied Ecology ›› 2021, Vol. 32 ›› Issue (4): 1221-1229.doi: 10.13287/j.1001-9332.202104.016

• Original Articles • Previous Articles     Next Articles

Characteristics of water use efficiency in a succession series of broadleaved Korean pine forests in Changbai Mountain, China.

TIAN Jin-yuan1,2, DIAO Hao-yu1,2, YUAN Feng-hui1, GUAN De-xin1, WU Jia-bing1, WANG An-zhi1*   

  1. 1Chinese Academy of Sciences Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shen-yang 110016, China;
    2University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-11-29 Accepted:2021-01-28 Published:2021-10-25
  • Contact: *E-mail: waz@iae.ac.cn
  • Supported by:
    National Key R&D Program of China (2019YFC0409102) and the National Natural Science Foundation of China (31770755, 31971728).

Abstract: Water use efficiency (WUE) is an objective indicator of plant water use, the research of which is helpful to understand the carbon-water coupling mechanism in terrestrial ecosystems. We investigated WUE of dominant tree species in the succession series of broad-leaved Korean pine forests in Changbai Mountain (middle-aged poplar-birch secondary forest, mature poplar-birch secondary forest, broad-leaved Korean pine forest) by using stable carbon isotope technology. The WUE of three forests under different succession stages decreased in order of broad-leaved Korean pine forest > middle-aged poplar-birch secondary forest > mature poplar-birch secondary forest. In addition, the same tree species had different WUE in different forest stands. The WUE of Populus davidiana and Betula platyphylla in the middle-aged poplar-birch secondary forest was higher than that in mature poplar-birch secondary forest. The WUE of Fraxinus mandshurica in broad-leaved Korean pine forest was much higher than that in middle-aged poplar-birch secondary forest. The WUE of Acer mono and Quercus mongolica in broad-leaved Korean pine forest was higher than that in mature poplar-birch secondary forest. The dominant tree species had different WUE as for wood types which generally presented ring-porous wood species>diffuse-porous wood species. There were different seasonal trends during the growing season among the dominant species in the broad-leaved Korean pine forest. The WUE of Fraxinus mandshurica, Acer mono, Quercus mongolica and Tilia amurensis showed first decreasing and then increasing, while that of Pinus koraiensis was opposite. The WUE of the broad-leaved Korean pine forest was negatively correlated with temperature in the growing season. The different WUE was one of the strategies for dominant species in the broad-leaved Korean pine forest in Changbai Mountains to adapt to the community succession and respond to climate and environmental change.

Key words: water use efficiency, carbon isotope technology, broad-leaved Korean pine forest of Changbai Mountain, succession