| 摘要: |
| 湿地生态系统在调节气候、净化水质和保护生物多样性等方面具有重要功能。湿地植被地上生物量（Aboveground biomass, AGB）是衡量湿地生态健康的重要指标，精准估算AGB对湿地保护与恢复至关重要。本研究利用多源遥感数据（Landsat-8、Sentinel-2）和Google Earth Engine平台，针对黄河三角洲湿地的植被AGB进行反演。对比五种机器学习模型，构建基于遥感波段、植被指数和水体指数的生物量模型，结合实地采样数据，评估不同遥感因子对AGB估算的影响，最终实现黄河三角洲湿地AGB的空间分布制图。结果表明：刁口河区域AGB均值范围为112.05 g/m2-170.09 g/m2。清水沟区域AGB均值范围为114.72 g/m2-165.47 g/m2。黄河三角洲湿地植被AGB值分布在0-746 g/m2之间，低AGB值区域（AGB≤304 g/m2）分布主要集中于离海较近的滩涂区域，AGB中值区间（304 g/m2≤AGB≤436 g/m2）区域分布较为聚集且分布面积最大，高AGB值区域（436 g/m2≤AGB）主要分布在河道两侧。研究结果为黄河三角洲湿地的生态保护与恢复提供了科学依据，并为湿地碳储量评估及气候变化研究提供了重要数据支持。 |
| 关键词: 黄河三角洲 湿地植被 地上生物量 Google Earth Engine |
| DOI： |
| 分类号:X87???????? |
| 基金项目:国家重点研究发展计划项目(2022YFC3204300)；国家自然科学基金项目（NSFC--山东联合基金）(U2006227) |
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| The spatial distribution inversion of aboveground vegetation biomass in the Yellow River Delta wetland. |
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ZHU Yan1, SHI Bing1, BA Yan-bin2, GAO Feng1, YUAN Qing-yun1
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1.College of Engineering, Ocean University of China;2.Yellow River Estuary Administration Lijin Yellow River Bureau
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| Abstract: |
| Wetland ecosystems play crucial roles in regulating climate, purifying water, and preserving biodiversity. Aboveground biomass (AGB) of wetland vegetation is an important indicator of wetland ecological health, and accurately estimating AGB is essential for wetland conservation and restoration. This study utilizes multi-source remote sensing data (Landsat-8, Sentinel-2) and the Google Earth Engine platform to invert the AGB of vegetation in the Yellow River Delta wetland. By comparing five machine learning models, biomass models based on remote sensing bands, vegetation indices, and water indices are constructed. Combined with field sampling data, the impact of different remote sensing factors on AGB estimation is evaluated, ultimately achieving spatial distribution mapping of AGB in the Yellow River Delta wetland. The results show that the mean AGB range in the Diaokou River area is 112.05 g/m2 to 170.09 g/m2, and in the Qingshuigou area, it is 114.72 g/m2 to 165.47 g/m2. The AGB values of wetland vegetation in the Yellow River Delta range from 0 to 746 g/m2. Low AGB value areas (AGB≤304 g/m2) are mainly distributed in the tidal flat areas close to the sea, the medium AGB value range (304 g/m2≤AGB≤436 g/m2) areas are relatively concentrated and have the largest distribution area, and high AGB value areas (AGB≥436 g/m2) are mainly distributed on both sides of the river channels. The research results provide scientific evidence for the ecological protection and restoration of the Yellow River Delta wetland and offer important data support for wetland carbon storage assessment and climate change research. |
| Key words: Yellow River Delta Wetland vegetation Aboveground biomass Google Earth Engine |
