在典型的热带森林中估计物种多样性:哪个现象阶段和空间分辨率合适?
These videos have been matched automatically. Contact us if they are not relevant.
These videos have been matched automatically. Contact us if they are not relevant.
在PubMed上查看摘要
概括
此摘要是机器生成的。热带森林多样性的最佳卫星数据使用特定的现象时期和空间分辨率. 9月份的图像和4-5米分辨率最好估计物种丰富性和多样性指数.
科学领域
- 生态学
- 遥感技术
- 森林管理
背景情况
- 卫星遥感对于大规模监测森林物种多样性至关重要.
- 使用卫星估计热带森林的多样性在传感器和时间选择方面面临挑战.
研究的目的
- 确定热带森林物种多样性的最佳时间窗口,空间分辨率和指标.
- 为热带森林监测选择适当的遥感数据和方法提供指导.
主要方法
- 使用现场物种多样性和光谱/结构异质度量的逐步线性回归模型.
- 使用每两个月的Sentinel-2图像 (一月至11月) 分析现象影响.
- 通过重新采样GF2图像以从0.8m到10m的分辨率来评估尺度依赖性.
主要成果
- 多样性估计的最佳现象时期是在生长季节的开始和结束,其中9月是最好的.
- 频谱信息始终解释了物种多样性指数的最大差异.
- 对于Richness和Shannon-Wiener指数,最佳空间分辨率为4-5米,与树冠大小相关.
- 纹理特征对多样性估计有很大的贡献.
结论
- 监测物种多样性高度依赖于遥感数据的时空尺度.
- 这些发现为使用遥感进行热带森林物种多样性监测提供了实际指导.
相关概念视频
From Water to Land
Kingdom Plantae first appeared about 410 million years ago as green algae transitioned from water to land. This land was a relatively uncolonized environment with ample resources. Terrestrial environments also offered more light and carbon dioxide, required by plants to grow and survive.
However, the stark differences between land and sea posed a formidable challenge to early colonizing species prompting many new adaptations that have resulted in the wide variety of plant...
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...