Chin J Plant Ecol ›› 2024, Vol. 48 ›› Issue (12): 1602-1611.DOI: 10.17521/cjpe.2024.0060  cstr: 32100.14.cjpe.2024.0060

• Research Articles • Previous Articles     Next Articles

Impact of species richness and composition on productivity and its changes with forest succession in Changbai Mountains, China

YUAN He-Yang1, HAO Min-Hui1,*(), HE Huai-Jiang2, ZHANG Chun-Yu1, ZHAO Xiu-Hai1   

  1. 1Research Center of Forest Management Engineering of State Forestry and Grassland Administration, Beijing Forestry University, Beijing 100083, China
    2Jilin Provincial Academy of Forestry Sciences, Changchun 130013, China
  • Received:2024-03-05 Accepted:2024-06-20 Online:2024-12-20 Published:2024-12-20
  • Contact: HAO Min-Hui
  • Supported by:
    National Natural Science Foundation of China(32371870)

Abstract:

Aims Biodiversity is an important driver in the formation and maintenance of ecosystem functions, but the underlying ecological mechanisms behind it are still highly controversial. The niche complementarity and mass-ratio effects are two main hypotheses that explain the relationship between biodiversity and ecosystem function. However, it is still unclear whether the relative contributions of niche complementarity and mass-ratio effects to ecosystem function in temperate forests change with succession.

Methods Based on the observations from three forest plots in Changbai Mountains, including a secondary Populus davidiana- Betula platyphylla forest (early successional stage), a secondary needleleaf-broadleaf mixed forest (middle successional stage), and a primary Tilia amurensis- Pinus koraiensisforest (late successional stage), this study estimated how biodiversity-ecosystem function relationships change with forest succession. Aboveground biomass and productivity were used as two indicators reflecting ecosystem function. Species richness and species composition were used to represent the niche complementarity and mass-ratio effects, respectively. The relative contributions of niche complementarity and mass-ratio effects to ecosystem function were tested using structural equation modeling.

Important findings The results showed that the relationships between species richness and ecosystem functions change with forest succession. The complementary effect of species richness was not significant in the early stages of succession, but gradually increased in the middle and late stages. Compared with species richness, species composition significantly affected ecosystem functions at all stages of forest succession, indicating that the mass-ratio effect plays an important role during the whole forest succession process. In addition, the results showed that aboveground biomass is also an important factor affecting forest productivity. This study elucidates how the relationships between biodiversity and ecosystem functions change with succession in temperate forests, which provide a scientific support for the ecological restoration and biodiversity protection of secondary forests in northeast China.

Key words: species richness, species composition, aboveground biomass, forest productivity, forest succession