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Provenance zone allocation and validation for reconstruction of historical forest landscape in Changbai Mountains.

ZHOU Sheng-nan1,2, LIANG Yu1*, HE Hong-shi3,4, WU Zhi-wei1#br#   

  1. (1Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 2University of Chinese Academy of Sciences, Beijing 100049, China; 3School of Geographical Science, Northeast Normal University, Changchun 130024, China; 4School of Natural Resource, University of Missouri, Columbia, MO 65201, USA).
  • Online:2016-12-10 Published:2016-12-10

Abstract:

For the sake of studying the formation mechanism of forest distribution and succession process differences among four terrestrial aspects of Changbai Mountains, the forest succession dynamics after the volcano super eruption occurred 800 years ago was to be reconstructed. Especially, the role of seed dispersal in the forest succession on tephra bare land was emphasized. Provenance zone was an intact and primeval forest ecological system after the volcano eruption, of which the forest composition, stand structure and succession dynamics can keep stable in long term regardless of any interference, and it provided sufficient seeds for the vegetation recovery on tephra bare land. This study defined the distribution range of tephra bare land after Changbai volcano erupted by integrating previous research results and a 15km extension outside the tephra bare land as provenance zone. In order to prove that provenance zone is a stable forest ecosystem and pave the way for the forest landscape reconstruction on tephra bare land, a spatially explicit forest landscape model LANDIS PRO 7.0 was used to simulate the 800 years long dynamic changes of forest aboveground biomass and species distribution area in provenance zone. Moreover, the simulation results were calibrated and validated using inventory data and data derived from published papers. The results showed that forest aboveground biomass in provenance zone kept relatively stable either in broadleaved Korean pine forest belt, sprucefir forest belt or at the whole landscape scale. Both the initialization biomass of major species in broadleaved Korean pine forest belt, sprucefir forest belt and the longterm results simulated at landscape scale were in the range of field survey and previous researches. The goodness of fit test value 〖AKe-〗 (%), MAE (%), RMSE (%) and ME were less than 10. Little differences were found between model initialization biomass, longterm simulation results and field survey or previous researches. A reasonable provenance zone allocation, calibration and validation for the simulation results and an effective stability analysis for the forest ecosystem in provenance zone were beneficial to enhancing the veracity of forest succession simulation on tephra bare land. It is of significance to explain the present differences of forest distribution regulations and succession processes among different aspects of Changbai Mountains as well as to predict its future forest succession dynamics.
 

Key words: summer maize, soil moisture, water deficit index (WDI)., remote sensing