Integrating structure-from-motion photogrammetry with geospatial software as a novel technique for quantifying 3D ecological characteristics of coral reefs
Integrating structure-from-motion photogrammetry with geospatial software as a novel technique for quantifying 3D ecological characteristics of coral reefs
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DOI：
10.7717/peerj.1077
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发表时间：
2015-07-07
期刊：
影响因子：
2.7
通讯作者：
Takabayashi, M.
中科院分区：
文献类型：
--
作者：
Burns, J. H. R.;Delparte, D.;Takabayashi, M.
珊瑚礁的结构复杂性在珊瑚礁生态系统的生物多样性、生产力和整体功能方面发挥着重要作用。传统的指标与2维属性是不够的表征礁结构的复杂性。三维（3D）方法可以更好地量化地形，粗糙度和其他结构特征，在珊瑚礁群落的生态中发挥重要作用。运动恢复结构（SfM）是一种新兴的低成本高分辨率三维地形重建摄影测量方法。本研究利用SfM三维重建软件工具，以创建纹理网格模型的珊瑚礁在法国护卫舰浅滩，在夏威夷群岛西北部的环礁。然后将重建的正射影像和数字高程模型与地理空间软件集成，以量化与3D复杂性有关的指标。由此产生的数据提供了珊瑚群落的高分辨率物理特性，然后将其与活的覆盖物相结合，以准确地将珊瑚礁描述为一个活的结构。珊瑚礁结构和复杂性的三维重建可以与未来研究中的其他生理和生态参数相结合，以开发可靠的生态系统模型，提高监测珊瑚礁生态系统健康和功能变化的能力。
The structural complexity of coral reefs plays a major role in the biodiversity, productivity, and overall functionality of reef ecosystems. Conventional metrics with 2-dimensional properties are inadequate for characterization of reef structural complexity. A 3-dimensional (3D) approach can better quantify topography, rugosity and other structural characteristics that play an important role in the ecology of coral reef communities. Structure-from-Motion (SfM) is an emerging low-cost photogrammetric method for high-resolution 3D topographic reconstruction. This study utilized SfM 3D reconstruction software tools to create textured mesh models of a reef at French Frigate Shoals, an atoll in the Northwestern Hawaiian Islands. The reconstructed orthophoto and digital elevation model were then integrated with geospatial software in order to quantify metrics pertaining to 3D complexity. The resulting data provided high-resolution physical properties of coral colonies that were then combined with live cover to accurately characterize the reef as a living structure. The 3D reconstruction of reef structure and complexity can be integrated with other physiological and ecological parameters in future research to develop reliable ecosystem models and improve capacity to monitor changes in the health and function of coral reef ecosystems.