DOI: 10.1016/j.foreco.2017.06.056
Scopus记录号: 2-s2.0-85023620014
论文题名: The forest strata-dependent relationship between biodiversity and aboveground biomass within a subtropical forest
作者: Ali A. ; Yan E.-R.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 401 起始页码: 125
结束页码: 134
语种: 英语
英文关键词: Ecosystem function
; Evergreen broadleaf forest
; Forest strata
; Niche complementarity effect
; Soil nutrients
; Species diversity
; Stand structure
; Structural equation modelling
Scopus关键词: Biodiversity
; Biomass
; Ecology
; Ecosystems
; Nutrients
; Soils
; Tropics
; Broadleaf forest
; Ecosystem functions
; Forest strata
; Niche complementarity effect
; Soil nutrients
; Stand structures
; Structural equation modelling
; Forestry
; aboveground biomass
; biodiversity
; broad-leaved forest
; ecosystem function
; evergreen forest
; individual variation
; niche overlap
; soil nutrient
; species diversity
; stand structure
; subtropical region
; understory
; China
英文摘要: The relationships between biodiversity and aboveground biomass in forest ecosystems have been intensively studied in recent decades. Still, the mechanisms that underlie it remain highly debated. We hypothesized that overstorey species diversity and individual tree size variation contribute to aboveground biomass and understorey species diversity through the niche complementarity effect, while weaken the relationship between understorey aboveground biomass and individual tree size variation due to the mixed effects of tree development, biotic interaction and reduced available resources by overstorey strata. The integrative relationships of species diversity and tree size variation (variation in diameter at breast height-DBH) with aboveground biomass were analysed at overstorey and understorey strata across 125 plots in a 5-ha subtropical forest in Eastern China. For comparison, we tested these relationships at individual strata (isolation modelling), and whole-community level, by using linear structural equation model while accounting for the effects of soil nutrients. The integrative modelling accounted for 35, 31, 16, 12, 4, and 0% of the variation in understorey aboveground biomass, overstorey aboveground biomass, overstorey DBH variation, overstorey species diversity, understorey species diversity, and understorey DBH variation, respectively. Overstorey DBH variation and species diversity had the positive direct effects on overstorey aboveground biomass. Overstorey species diversity significantly promoted the understorey species diversity, but DBH variation and aboveground biomass of overstorey strata had negligible effects on the diversity and aboveground biomass of understorey strata. Soil nutrients had positive direct effect on overstorey DBH variation, but negative direct effects on overstorey and understorey aboveground biomass and overstorey species diversity. These results provide strong evidence for the niche complementarity effect for driving positive relationships of species diversity and individual tree size variation with aboveground biomass at overstorey strata. The strong and consistent negative effects of soil nutrients on overstorey aboveground biomass and species diversity suggest an important mechanism that high species diversity of overstorey strata with great tree size variation on nutrient-poor soils is crucial for driving high aboveground biomass in subtropical forest ecosystems. In conclusion, this study suggests that no sole and ubiquitous relationship between biodiversity and aboveground biomass exists in a structurally complex forest, but rather that the magnitude and direction of this relationship is greatly dependent on the forest strata where available resources shift substantially. We argue that ecological models for predicting aboveground biomass would be improved by including separate effects of overstorey and understorey diversity. © 2017 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64170
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Forest Ecosystem Research and Observation Station in Putuo Island, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China; Tiantong National Forest Ecosystem Observation and Research Station, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
Recommended Citation:
Ali A.,Yan E.-R.. The forest strata-dependent relationship between biodiversity and aboveground biomass within a subtropical forest[J]. Forest Ecology and Management,2017-01-01,401