Discrepancy in Phenological Indicators from CO2 Flux, MODIS Image and Ground Observation in a Temperate Mixed Forest and an Alpine Shrub Ecosystem
文献类型：期刊论文
| 作者 | Guo, Chuying1,4,6; Zhang, Leiming4,6; Cao, Peiyu3,5; Luo, Wenxing2; Huang, Rong4,6 |
| 刊名 | PLANTS-BASEL
 |
| 出版日期 | 2025-12-22 |
| 卷号 | 15期号:1页码:39 |
| 关键词 | plant phenology vegetation index autumn phenology photosynthetic capacity vegetation composition canopy structure |
| ISSN号 | 2223-7747 |
| DOI | 10.3390/plants15010039 |
| 产权排序 | 2 |
| 文献子类 | Article |
| 英文摘要 | Different approaches have been developed to assess the phenological dynamics of ecosystems. However, diverse data sources and extraction methods for assessing ecosystem phenology can result in discrepant and inaccurate results, especially across different types of vegetation under various climate classifications. Based on the phenology of dominant plant species (Pheplant) obtained from ground monitoring in an alpine shrub meadow at Haibei Station (HBS) on the Qinghai-Tibetan Plateau and in a broad-leaved Korean pine forest at Changbai Mountain (CBF) in Northeastern China, we extracted vegetation phenology from the Normalized Difference Vegetation Index (PheNDVI) and photosynthetic phenology from gross primary productivity (PheGPP) using five common methods. These methods included Gaussian fitting, single logistic function fitting, double logistic function fitting, and smoothing techniques combined with fixed threshold and derivative-based determination approaches. There was no consistent interannual trend in either plant phenology or environmental factors at the two sites. Among the three types of plant phenology, a similar interannual pattern in the start of the growing season (SOS) was observed, whereas the interannual patterns for the end of the growing season (EOS) and the growing season length (GSL) were asynchronous. Compared to Pheplant, both PheNDVI and PheGPP exhibited an earlier SOS, a delayed EOS, and consequently an extended GSL. The SOS derived from both PheNDVI and PheGPP was advanced by increasing spring temperatures at both sites, while the relationship between EOS and air temperature was relatively weak. The discrepancy between PheNDVI and PheGPP was more pronounced at CBF than at HBS, likely due to the complex vegetation composition and structure of the mixed forest. The different extraction methods produced more consistent and less variable estimates of SOS compared to EOS and GSL at both sites. Among the five methods, the dynamic threshold approach showed a relatively small difference between PheNDVI and PheGPP, suggesting that it could provide a more consistent estimate of plant phenology across the two sites. This study clearly reveals the inherent discrepancies associated with using different types of phenological data and the influence of extraction methods on phenology across different plant functional types. More attention should be given to improving the accuracy of EOS and understanding the influence of vegetation composition on phenological variation in future studies. |
| URL标识 | 查看原文 |
| WOS关键词 | LAND-SURFACE PHENOLOGY ; NET CARBON UPTAKE ; GREEN-UP DATE ; SATELLITE-DERIVED PHENOLOGY ; SPRING VEGETATION PHENOLOGY ; QINGHAI-TIBETAN PLATEAU ; NDVI TIME-SERIES ; CLIMATE-CHANGE ; GROWING-SEASON ; INTERANNUAL VARIABILITY |
| WOS研究方向 | Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001657383900001 |
| 出版者 | MDPI |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/219747]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 通讯作者 | Zhang, Leiming |
| 作者单位 | 1.Xiamen Univ, Coll Environm & Ecol, Xiamen 361102, Peoples R China; 2.Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China 3.Cornell Univ, Cornell Atkinson Ctr Sustainabil, Dept Global Dev, Ithaca, NY 14853 USA; 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China; 5.Cornell Univ, Coll Agr & Life Sci, Dept Global Dev, Ithaca, NY 14853 USA; 6.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Guo, Chuying,Zhang, Leiming,Cao, Peiyu,et al. Discrepancy in Phenological Indicators from CO2 Flux, MODIS Image and Ground Observation in a Temperate Mixed Forest and an Alpine Shrub Ecosystem[J]. PLANTS-BASEL,2025,15(1):39. |
| APA | Guo, Chuying,Zhang, Leiming,Cao, Peiyu,Luo, Wenxing,&Huang, Rong.(2025).Discrepancy in Phenological Indicators from CO2 Flux, MODIS Image and Ground Observation in a Temperate Mixed Forest and an Alpine Shrub Ecosystem.PLANTS-BASEL,15(1),39. |
| MLA | Guo, Chuying,et al."Discrepancy in Phenological Indicators from CO2 Flux, MODIS Image and Ground Observation in a Temperate Mixed Forest and an Alpine Shrub Ecosystem".PLANTS-BASEL 15.1(2025):39. |
入库方式： OAI收割
来源：地理科学与资源研究所
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