| 引用本文： |
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张云,赵东洋,尤广然,付杰,龚艳君.2001—2023年觉华岛植被NPP时空变化特征及驱动力研究[J].广西科学,2026,33(3):523-532. [点击复制]
- ZHANG Yun,ZHAO Dongyang,YOU Guangran,FU Jie,GONG Yanjun.Spatiotemporal Variation Characteristics and Drivers of Vegetation NPP on Juehua Island from 2001 to 2023[J].Guangxi Sciences,2026,33(3):523-532. [点击复制]
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| 摘要: |
| 为揭示辽东湾典型海岛植被净初级生产力(Net Primary Productivity，NPP)的时空演变规律及驱动机制，并为海岛生态保护和海洋碳汇管理提供依据，本研究以觉华岛为研究区，基于收集及实地调查数据，运用CASA(Carnegie-Ames-Stanford Approach)模型估算其2001—2023年植被NPP，并结合偏导数法及Spearman相关性分析量化驱动因子贡献。结果显示：2001—2023年，觉华岛植被NPP年平均值总体呈缓慢增长趋势，22年平均值为689.41 g C/(m2·a),总量增长速度为67.16 Mg C/a，22年累计增幅22.3%；NPP空间异质性显著，呈中部偏南向四周递减的趋势，高、中、低值区面积占比分别为21.2%、30.5%、48.3%；气候因子(平均温度、累计降水量、累计日照时长)与人类活动(植被覆盖度变化)共同驱动NPP变化，相对贡献率分别为59.3%与40.7%。其中，植被覆盖度变化(40.7%)、累计降水量(36.2%)为主导因子，与NPP呈显著正相关(r=0.757、0.688，P＜0.05)，累计日照时长(19.6%)、平均气温(3.5%)相关性较弱。可见，人类活动是植被NPP变化的关键因素，是提升植被碳汇功能的核心动力。本研究结果可为觉华岛生态系统生产力评估、区域生态规划和安全保障提供参考，并助力觉华岛国家级海洋公园生态环境的保护和建设。 |
| 关键词: 觉华岛 净初级生产力(NPP) CASA模型 时空特征 驱动力 |
| DOI：10.13656/j.cnki.gxkx.20260708.007 |
| 投稿时间：2026-02-24修订日期：2026-04-15 |
| 基金项目:辽宁省自然科学基金指导计划项目(20180551164)资助。 |
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| Spatiotemporal Variation Characteristics and Drivers of Vegetation NPP on Juehua Island from 2001 to 2023 |
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ZHANG Yun, ZHAO Dongyang, YOU Guangran, FU Jie, GONG Yanjun
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| (Liaoning Ocean and Fisheries Science Research Institute, Dalian, Liaoning, 116023, China) |
| Abstract: |
| To reveal the spatiotemporal evolution patterns and driving mechanisms of vegetation Net Primary Productivity (NPP) on typical islands in Liaodong Bay,and provide a scientific basis for island ecological conservation and marine carbon sink management,the study took Juehua Island as the research area.On the basis of archived datasets and field survey data,the Carnegie-Ames-Stanford Approach (CASA) model was employed to estimate vegetation NPP from 2001 to 2023.Partial derivative method and Spearman correlation analysis were further integrated to quantify the contribution rates of driving factors.The results indicated that the annual mean vegetation NPP of Juehua Island exhibited a slow upward trend during 2001—2023.The 22-year mean NPP reached 689.41 g C/(m2·a).The growth rate of total NPP was 67.16 Mg C/a,and the cumulative growth rate over the 22 years was 22.3%.NPP distribution exhibited obvious spatial heterogeneity:NPP gradually decreased from the south-central region to the surrounding areas.The proportions of high-value,medium-value,and low-value zones accounted for 21.2%,30.5%,and 48.3%,respectively.NPP variations were jointly driven by climatic factors (mean temperature,cumulative precipitation,and cumulative sunshine duration) and human activities (vegetation coverage change),with relative contribution rates of 59.3% and 40.7%,respectively.Vegetation coverage change (40.7%) and cumulative precipitation (36.2%) acted as the dominant drivers,showing positive correlations with NPP (r=0.757,0.688,P<0.05).Cumulative sunshine duration (19.6%) and mean temperature (3.5%) presented weak correlations with NPP.It can be concluded that human activities constitute the critical factor governing vegetation NPP variations and serve as the core driver for the improvement of vegetation carbon sink capacity.The findings of this study can provide references for ecosystem productivity assessment,regional ecological planning,and ecological security guarantee on Juehua Island,and support the ecological protection and construction of Juehua Island National Marine Park. |
| Key words: Juehua Island Net Primary Productivity (NPP) CASA model spatiotemporal characteristics driver |
