Modern Pollen-Environment Calibrations in Thailand-Malaysia: Normalised Difference Vegetation Index (NDVI) and Precipitation as Quantitative Constraints for Vegetation Reconstruction
文献类型：期刊论文
| 作者 | Gong, Fei4; Dai, Lu4; Benchawattananon, Rachadaporn3; Foong, Swee Yeok2; Cheng, Zhongjing1; Weng, Chengyu4 |
| 刊名 | JOURNAL OF BIOGEOGRAPHY
 |
| 出版日期 | 2026-03-12 |
| 卷号 | 53期号:3页码:14 |
| 关键词 | Huber regression Malaysia model pollen precipitation quantitative analysis South China Sea Thailand |
| ISSN号 | 0305-0270 |
| DOI | 10.1111/jbi.70191 |
| 通讯作者 | Dai, Lu(dailu2288@163.com) |
| 英文摘要 | Aim Quantitative tools for reconstructing past hydroclimate in Southeast Asia remain limited. We therefore develop modern calibrations linking non-arboreal pollen (NAP; excluding forest-understory herbs and fern spores) to Normalised Difference Vegetation Index (NDVI) and mean annual precipitation and evaluate their out-of-sample performance when applied to marine pollen records from the southern South China Sea (SCS). Location Central and eastern Thailand; western Peninsular Malaysia; southern SCS (exposed Sunda Shelf during glacial lowstands). Time Period Modern pollen calibration: application to the last glacial maximum (LGM). Major Taxa NAP from tropical ecosystems. Methods We compiled 88 topsoil pollen samples (33 new from Thailand, plus 55 published from Malaysia). Interpolated mean annual precipitation (WorldClim v2.1 climatology) and NDVI were extracted for each site. Linear regressions quantified NAP-NDVI relationships within Thailand and across Thailand-Malaysia. A Huber regression model predicting precipitation from pollen predictors (NAP and high-mountain pollen) was evaluated using 5-fold cross-validation. Segmented (piecewise) regressions identified pollen-space thresholds separating vegetation states. These calibrations and associated thresholds were applied to published marine pollen records from the southern SCS. Results and Main Conclusions NAP covaries strongly and linearly with the NDVI across Thailand-Malaysia. A Huber regression linking NAP to mean annual precipitation shows robust out-of-sample predictive skill under 5-fold cross-validation (R-2 = 0.77; RMSE = 365 mm year(-1)). Segmented regression further identifies a practical pollen-space threshold of similar to 51% NAP that discriminates open landscapes (wooded grasslands) from closed forest in eastern Thailand. Applied to ten published marine pollen records from the southern SCS (shelf and slope; similar to 25-18 cal ka BP, LGM), our NDVI- and precipitation-based reconstructions, together with the threshold framework, suggest that closed forest prevailed in the western and eastern sectors, whereas slightly more open forest characterised the southern sector during the LGM period. Overall, inferred humidity conditions appear broadly comparable to those of modern surrounding coastal regions. |
| WOS关键词 | SOUTH CHINA SEA ; SURFACE SEDIMENTS ; CLIMATE ; FOREST ; RECORD ; SENSITIVITY ; LANDSCAPE ; MARINE ; COVER ; SHELF |
| 资助项目 | 2025 Independent Research Project, State Key Laboratory of Marine Geology, Tongji University[MGZ2025-K01] ; National Natural Science Foundation of China[42276054] ; National Key Research and Development Program of China[2023YFF0803902] |
| WOS研究方向 | Environmental Sciences & Ecology ; Physical Geography |
| 语种 | 英语 |
| WOS记录号 | WOS:001712516300001 |
| 出版者 | WILEY |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/205106]  |
| 专题 | 中国科学院海洋研究所 |
| 通讯作者 | Dai, Lu |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Qingdao, Shandong, Peoples R China 2.Univ Sains Malaysia, Sch Biol Sci, George Town, Malaysia 3.Khon Kaen Univ, Fac Sci, Khon Kaen, Thailand 4.Tongji Univ, State Key Lab Marine Geol, Shanghai, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gong, Fei,Dai, Lu,Benchawattananon, Rachadaporn,et al. Modern Pollen-Environment Calibrations in Thailand-Malaysia: Normalised Difference Vegetation Index (NDVI) and Precipitation as Quantitative Constraints for Vegetation Reconstruction[J]. JOURNAL OF BIOGEOGRAPHY,2026,53(3):14. |
| APA | Gong, Fei,Dai, Lu,Benchawattananon, Rachadaporn,Foong, Swee Yeok,Cheng, Zhongjing,&Weng, Chengyu.(2026).Modern Pollen-Environment Calibrations in Thailand-Malaysia: Normalised Difference Vegetation Index (NDVI) and Precipitation as Quantitative Constraints for Vegetation Reconstruction.JOURNAL OF BIOGEOGRAPHY,53(3),14. |
| MLA | Gong, Fei,et al."Modern Pollen-Environment Calibrations in Thailand-Malaysia: Normalised Difference Vegetation Index (NDVI) and Precipitation as Quantitative Constraints for Vegetation Reconstruction".JOURNAL OF BIOGEOGRAPHY 53.3(2026):14. |
入库方式： OAI收割
来源：海洋研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。