长江科学院院报 ›› 2024, Vol. 41 ›› Issue (8): 47-54.DOI: 10.11988/ckyyb20230271

• 水土保持与生态修复 • 上一篇    下一篇

近20年间鄱阳湖湿地春秋季植被生物量时空动态

杨梨萍(), 解秦米佳, 李谦维, 张晓雅, 朱佳涛, 高俊琴()   

  1. 北京林业大学 生态与自然保护学院,北京 100083
  • 收稿日期:2023-03-21 修回日期:2023-05-22 出版日期:2024-08-01 发布日期:2024-08-13
  • 通讯作者: 高俊琴(1978-),女,山西临汾人,教授,博士,博士生导师,主要从事湿地生态学研究。E-mail:
  • 作者简介:

    杨梨萍(1998-),女,重庆人,硕士研究生,主要从事湿地生态学研究。E-mail:

  • 基金资助:
    2021年中央财政湿地保护与恢复补助江西省湿地生态系统碳储量评估项目([2021]67号)

Spatial and Temporal Dynamics of Plant Biomass in Poyang Lake Wetland in Spring and Autumn in Recent Two Decades

YANG Li-ping(), XIEQIN Mi-jia, LI Qian-wei, ZHANG Xiao-ya, ZHU Jia-tao, GAO Jun-qin()   

  1. School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China
  • Received:2023-03-21 Revised:2023-05-22 Published:2024-08-01 Online:2024-08-13

摘要:

湿地生态系统是碳密度最大的生态系统之一,摸清湿地植被生物量及其动态变化对于实现“双碳”目标具有重要意义。基于Landsat遥感影像对鄱阳湖湿地2000—2020年间春秋季的植被地上生物量进行了反演和估算,分析了植被生物量随时间的变化趋势以及空间热点区域。结果表明:①近20年间鄱阳湖湿地春季和秋季植被地上生物量分别为0.85×109~4.20×109 g和0.68×109~6.69×109 g,春季植被地上生物量随时间变化不明显,秋季植被地上生物量随时间呈上升趋势。②鄱阳湖湿地春季植被地上生物量分布热点区域面积为754.15 km2,秋季为1 085.49 km2,分别占鄱阳湖湿地总面积的21.58%和30.66%。③鄱阳湖湿地春季和秋季植被地上生物量与月均温度呈显著正相关关系。鄱阳湖湿地植被碳汇功能较强,且呈平稳甚至上升趋势,有利于碳中和目标的实现。

关键词: 植被生物量, 遥感反演, 时空分布, 热点区域, 鄱阳湖

Abstract:

Wetlands possess some of the highest carbon densities among ecosystems. Understanding the dynamics and growth trends of wetland vegetation biomass is crucial for achieving the carbon peaking and carbon neutrality goals. Based on LandSat remote sensing images, we estimated the aboveground vegetation biomass in Poyang Lake wetland during spring and autumn between 2000 and 2020, and examined its development trend in different growing seasons and hotspot areas. The findings revealed that: 1) In recent two decades, aboveground vegetation biomass in spring ranged from 0.85×109 to 4.20×109 g, while in autumn from 0.68×109to 6.69×109 g. Spring biomass remained stable, whereas autumn biomass exhibited a consistent increase over time. 2) Hotspot areas for aboveground vegetation biomass in spring and autumn covered 754.15 km2 and 1 085.49 km2, respectively, representing 21.58% and 30.66% of the total wetland area. 3) Spring and autumn biomass showed a positive correlation with monthly mean temperature. The vegetation in Poyang Lake wetland serves as a robust carbon sink, aiding in the pursuit of carbon peaking and carbon neutrality.

Key words: plant biomass, remote sensing retrieval, temporal-spatial distribution, hotspot area, Poyang Lake

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