空间尺度和植被复杂性对木本物种多样性的重要性及其与遥感变量的关系

IF 10.6 1区 地球科学 Q1 GEOGRAPHY, PHYSICAL ISPRS Journal of Photogrammetry and Remote Sensing Pub Date : 2024-08-07 DOI:10.1016/j.isprsjprs.2024.07.029
Wendy G. Canto-Sansores , Jorge Omar López-Martínez , Edgar J. González , Jorge A. Meave , José Luis Hernández-Stefanoni , Pedro A. Macario-Mendoza
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引用次数: 0

摘要

植物物种多样性是生态系统功能的关键,但近几十年来,人类活动已导致这一群落特征惊人地减少。因此,在经济、高效的遥感监测基础上制定了解多样性动态的策略,以及研究空间尺度和植被结构复杂性与这些动态的相关性至关重要。在这里,我们使用两种数学方法来评估人类改造景观中两种复杂程度不同的植被类型中热带木本物种多样性与光谱多样性之间的关系。植被复杂度是通过集中了累积重要性值指数不同比例的物种的比例来衡量的。使用希尔数评估了三种空间尺度的物种多样性,并计算了光谱异质性指标、植被指数以及来自 Landsat 9 和 Sentinel-2 传感器的原始数据,并通过一般线性模型(GLM)和随机森林进行了分析。植被复杂度是利用遥感指标建立物种模型的一个重要变量,这表明需要根据植被类型而不是区域建立物种多样性模型。山丘数量与遥感指标显示出不同的关系,这与生态过程对物种多样性的规模依赖性是一致的。与之前的多份报告相反,在我们的研究中,GLM 在各阶希尔数与遥感指标之间产生了最佳拟合。如果我们要满足在全球范围内开展高效、快速的木本物种多样性监测的需要,我们建议利用遥感变量对物种多样性进行建模是一种有吸引力的策略,但前提是必须承认每种植被类型的固有特性,以避免低估或高估偏差。
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The importance of spatial scale and vegetation complexity in woody species diversity and its relationship with remotely sensed variables

Plant species diversity is key to ecosystem functioning, but in recent decades anthropogenic activities have prompted an alarming decline in this community trait. Thus, developing strategies to understand diversity dynamics based on affordable and efficient remote sensing monitoring is essential, as well as examining the relevance of spatial scale and vegetation structural complexity to these dynamics. Here, we used two mathematical approaches to assess the relationship between tropical woody species diversity and spectral diversity in a human-modified landscape in two vegetation types differing in their degree of complexity. Vegetation complexity was measured through the fraction of species that concentrate different proportions of the cumulative importance value index. Species diversity was assessed using Hill numbers at three spatial scales, and metrics of spectral heterogeneity, vegetation indices, as well as raw data from Landsat 9 and Sentinel-2 sensors were calculated and analysed through general linear models (GLM) and Random Forest. Vegetation complexity emerged as an important variable in modelling species from remote sensing metrics, indicating the need to model species diversity by vegetation type rather than region. Hill numbers showed different relationships with remotely sensed metrics, in consistency with the scale-dependency of ecological processes on species diversity. Contrary to multiple previous reports, in our study, GLMs produced the best fits between Hill numbers of all orders and remotely sensed metrics. If we are to meet the need of conducting efficient and speedy woody species diversity monitoring globally, we propose modelling this diversity from remotely-sensed variables as an attractive strategy, so long as the intrinsic properties of each vegetation type are acknowledged to avoid under- or overestimation biases.

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来源期刊
ISPRS Journal of Photogrammetry and Remote Sensing
ISPRS Journal of Photogrammetry and Remote Sensing 工程技术-成像科学与照相技术
CiteScore
21.00
自引率
6.30%
发文量
273
审稿时长
40 days
期刊介绍: The ISPRS Journal of Photogrammetry and Remote Sensing (P&RS) serves as the official journal of the International Society for Photogrammetry and Remote Sensing (ISPRS). It acts as a platform for scientists and professionals worldwide who are involved in various disciplines that utilize photogrammetry, remote sensing, spatial information systems, computer vision, and related fields. The journal aims to facilitate communication and dissemination of advancements in these disciplines, while also acting as a comprehensive source of reference and archive. P&RS endeavors to publish high-quality, peer-reviewed research papers that are preferably original and have not been published before. These papers can cover scientific/research, technological development, or application/practical aspects. Additionally, the journal welcomes papers that are based on presentations from ISPRS meetings, as long as they are considered significant contributions to the aforementioned fields. In particular, P&RS encourages the submission of papers that are of broad scientific interest, showcase innovative applications (especially in emerging fields), have an interdisciplinary focus, discuss topics that have received limited attention in P&RS or related journals, or explore new directions in scientific or professional realms. It is preferred that theoretical papers include practical applications, while papers focusing on systems and applications should include a theoretical background.
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