Diverging shifts in spring phenology in response to biodiversity loss in a subtropical forest

Yanjun Du, Bo Yang, Si Chong Chen, Keping Ma

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Questions: Despite our increased understanding of how climate change influences plant phenology, it remains poorly understood whether diversity loss could alter phenology as well. Here we investigated the following: (a) do changes in plant diversity affect leaf-out and flowering dates for woody species; (b) which group of variables are more important in influencing leaf-out and flowering dates, abiotic variables (soil variables) or biotic variables (plant diversity)?. Study site: A subtropical forest in the Biodiversity–Ecosystem Functioning Experiment of China, located in Jiangxi Province, China. Methods: Species were planted in various combinations to create plots with varying tree richness: 1, 2, 4, 8, 16 or 24 species. We monitored leaf-out and flowering dates of eight randomly selected species in 17 plots in 2018. A linear model was used to test whether species diversity was a predictor of leaf-out/flowering times for each species. We then fit linear mixed-effects models to assess the combined influence of species diversity, soil Total Carbon and Total Nitrogen on the overall community. Results: In the low-diversity plots, we found two species leafing out earlier, one leafing out later and four showing no significant difference. Leaf-out date advanced an average of 0.3 days per species lost. Of all the biotic and abiotic predictor variables, Total Nitrogen was the only one significantly correlated with leaf-out date. No significant correlation was found between species diversity and flowering date for any of the species. Conclusions: Our study provides the first empirical evidence concerning the effects of biodiversity loss on plant spring phenology for woody species. Our findings illustrate that fluctuation in plant diversity could alter the timing of leaf-out and that abiotic variables may be more important than biotic variables in determining leaf-out dates in subtropical forest. Overall, declining diversity may exacerbate the phenological changes attributed to rising global temperatures.

Original languageEnglish
Pages (from-to)1175-1183
Number of pages9
JournalJournal of Vegetation Science
Volume30
Issue number6
DOIs
StatePublished - 1 Nov 2019
Externally publishedYes

Keywords

  • BEF-China
  • Total Carbon
  • Total Nitrogen
  • biodiversity–ecosystem functioning
  • flowering
  • leaf-out
  • species interactions
  • species loss
  • spring phenology

ASJC Scopus subject areas

  • Ecology
  • Plant Science

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