遥感光谱异质性和鸟类多样性之间的关系是由景观类型调节的
Dominika Prajzlerová1, Vojtěch Barták1, Petr Keil1
1Department of Spatial Sciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Praha - Suchdol, Czech Republic.
概括
未分类的遥感数据,特别是光谱异质性,比分类的土地覆盖更好地预测鸟类物种丰富程度. 整合景观类型和未分类数据的模型显示了生物多样性建模的最佳结果.
科学领域:
- 生态生态学 生态生态学
- 遥感 遥感 遥感 遥感
- 生物多样性保护 生物多样性保护
背景情况:
- 了解物种丰富模式是保护的关键.
- 通常使用分类土地覆盖,但未分类的遥感数据可能提供更好的洞察力.
- 谱变性假设表明未分类数据的潜力.
研究的目的:
- 为了确定未分类的Landsat 8多谱数据是否可以替代鸟类多样性建模中的分类数据.
- 在鸟类物种丰富的背景下测试光谱变性假设.
- 探索空间尺度和景观类型对这些关系的影响.
主要方法:
- 在两个空间尺度上 (2014-2017年) 使用来自捷克共和国的数据建模的鸟类物种丰富度 (约. 131平方公里和8平方公里).
- 使用分类的土地覆盖面 (Corine Land Cover 2018) 和未分类的遥感数据 (反射率,植被指数) 作为预测指标.
- 评估了光谱异质性和景观组成,将景观类型集成到模型中.
主要成果:
- 未分类的遥感数据,特别是光谱异质度指标,在预测鸟类物种丰富性方面表现优于分类的土地覆盖数据.
- 结合未分类数据和景观类型之间的相互作用的模型产生了最好的预测性能.
- 在不同景观类型中,光谱异质性的有效性有所不同.
结论:
- 来自未分类的多谱数据的光谱异质性是评估鸟类多样性的强大工具.
- 对景观类型和空间尺度的计算对于准确的鸟类丰富性建模至关重要.
- 未分类的遥感数据为生态研究提供了传统的分类土地覆盖数据的有希望的替代方案.
相关概念视频
Distribution and Dispersion
21.8K
To understand intra-specific interactions in populations, scientists measure the spatial arrangement of species individuals. This geographic arrangement is known as the species distribution or dispersion. Highly territorial species exhibit a uniform distribution pattern, in which individuals are spaced at relatively equal distances from one another. Species that are highly tied to particular resources, such as food or shelter, tend to concentrate around those resources, and thus exhibit a...
21.8K
What is Biodiversity?
27.3K
Biodiversity describes the variety of living things at multiple organizational levels: genetic, species and ecosystem diversity. Species diversity includes all branches of the evolutionary tree from single-celled prokaryotic organisms, bacteria, and archaea, to the eukaryotic kingdoms: plants; animals; fungi; and protists. To date, there have been about 1.75 million species identified, and new species are discovered every week.
27.3K
Speciation Rates
21.2K
Overview
21.2K
Habitat Fragmentation
17.5K
Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
17.5K
Types of Selection
40.4K
Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
40.4K
Ecological Niches
23.6K
All organisms have a position within an ecosystem. The complete set of living and nonliving factors—including food resources, climate, and terrain—that define the position of a given organism are collectively referred to as the organism’s ecological niche.
23.6K


