Abstract
Land surface phenology (LSP), the characterization of plant phenology with satellite data, is essential for understanding the effects of climate change on ecosystem functions. Considerable LSP variation is observed within local landscapes, and the role of biotic factors in regulating such variation remains underexplored. In this study, we selected four National Ecological Observatory Network terrestrial sites with minor topographic relief to investigate how biotic factors regulate intra-site LSP variability. We utilized plant functional type (PFT) maps, functional traits, and LSP data to assess the explanatory power of biotic factors for the start and end of season (SOS and EOS) variability. Our results indicate that PFTs alone explain only 0.8–23.4% of intra-site SOS and EOS variation, whereas including functional traits significantly improves explanatory power, with cross-validation correlations ranging from 0.50 to 0.85. While functional traits exhibited diverse effects on SOS and EOS across different sites, traits related to competitive ability and productivity were important for explaining both SOS and EOS variation at these sites. These findings reveal that plants exhibit diverse phenological responses to comparable environmental conditions, and functional traits significantly contribute to intra-site LSP variability, highlighting the importance of intrinsic biotic properties in regulating plant phenology.
| Original language | English |
|---|---|
| Pages (from-to) | 1965-1980 |
| Number of pages | 16 |
| Journal | New Phytologist |
| Volume | 242 |
| Issue number | 5 |
| DOIs | |
| State | Published - Jun 2024 |
Funding
This work was supported by National Natural Science Foundation of China (no. 31922090) and Hong Kong Research Grant Council General Research Fund and Collaborative Research Fund (no. 17305321). J Wu was also supported by the HKU Seed Funding for Strategic Interdisciplinary Research Scheme, Hong Kong Research Grant Council General Research Fund and Collaborative Research Fund (no. C5062‐21GF), and the Innovation and Technology Fund (funding support to State Key Laboratories in Hong Kong of Agrobiotechnology) of the HKSAR, China. ZW was funded by National Natural Science Foundation of China (42001305). MM was supported by NASA grant no. 80NSSC21K1974. J Wang was supported by Shenzhen Science and Technology Program (Grant no. 20220816162849005). The National Ecological Observatory Network (NEON) is a program sponsored by the National Science Foundation and operated under cooperative agreement by Battelle. This material is based in part upon work supported by the National Science Foundation through the NEON Program.
Keywords
- NEON
- biotic controls
- intra-site variability
- land surface phenology
- plant functional traits
- plant functional types
- plant phenology