在飞河三角洲,巴布亚新几内亚的红树林森林动态的概况
Renjie Wu1, Zhijun Dai2, Xuefei Mei1
1State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China.
Marine pollution bulletin
|May 11, 2025
概括
飞河三角洲的红树林从1988年到2023年减少了33.83%,原因是森林砍伐和水产养殖. 东南波浪和潮流显著影响红树林的动态和海岸线的变化.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
背景情况:
- 红树林是关键的沿海生态系统,支持全球碳循环.
- 这些重要息地面临着来自自然和人类活动的重大退化威胁.
- 了解红树林的动态对于有效的保护和恢复至关重要.
研究的目的:
- 分析飞河三角洲 (FRD) 内红树林的动态变化,巴布亚新几内亚.
- 确定影响研究区域红树林退化和扩张的关键驱动因素.
- 提供数据驱动的洞察力,为红树林管理和恢复战略提供信息.
主要方法:
- 利用了来自LandsatTM,ETM和OLI卫星系列的477张遥感图像.
- 采用随机森林方法进行高精度的红树林分类,总体准确率达到了97%.
- 量化了红树林面积的变化,并分析了36年 (1988-2023) 的环境因素.
主要成果:
- 在FRD观察到红树林面积显著下降33.83%,从81,979.2公减少到54,247.73公.
- 三角洲沿海地区经历了54.71%的退化,而三角洲岛屿地区则出现了2.05%的轻微下降.
- 在特定的三角洲地区发生了1309.32公的向海扩张,部分抵消了向陆地的损失;砍伐森林和水产养殖是主要的退化驱动因素.
结论:
- 森林砍伐和水产养殖的扩张是德国红树林丧失的主要原因.
- 东南波是海岸线退缩的主要因素,超过了海平面上升的影响.
- 河流沉积物排放和潮流在促进特定地区红树林生长方面发挥着重要作用,突出显示了复杂的生态系统动态.
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