Galapagos_3D

This data is from the paper: "Spatial Variation in Coral Diversity and Reef Complexity in the Galápagos: Insights from Underwater Photogrammetry and New Data Extraction Methods". Corals in the Galápagos present diverse reef configurations from biogenic coral reefs to coral communities growing on rocks and sand. These corals have experienced decades of disturbances including recurring El Niño and mass bleaching events. However, traditional methods in ecology have limited capacity in describing coral demographic trends across large spatial scales. Therefore, the adverse effects of climate change on these reefs remains unclear. To bridge this gap we surveyed seven reef sites across the archipelago using underwater photogrammetry. We present new methods for 3D annotation and fractal dimension calculation. Our findings reveal variation in coral cover, diversity, and structural complexity across the archipelago. Our results align with previous studies in the region and add important information on reef structural complexity which was not measured here before. We release a unique dataset: Galápagos_3D, including seven 3D models and over 17,000 annotated images from the region. Our study provides an important baseline for long-term monitoring, research, and conservation in the Galápagos. Such studies can lead to new discoveries in coral ecology regarding for example recovery capacity and resilience, and help to establish evidence-based policies in the region and beyond.本数据集源自论文《加拉帕戈斯海域珊瑚多样性与礁体复杂度的空间异质性：水下摄影测量与新型数据提取方法的研究启示》。 加拉帕戈斯海域的珊瑚存在多样的礁体构型，从生物成因珊瑚礁到附着于岩石与沙质基底的珊瑚群落均有分布。该区域珊瑚已历经数十年的扰动事件，包括反复发生的厄尔尼诺现象与大规模珊瑚白化事件。然而，传统生态学方法在大空间尺度下描述珊瑚种群动态趋势的能力有限，因此气候变化对这些礁体的负面影响仍不明确。 为填补这一研究空白，本研究依托水下摄影测量技术，对该群岛内的7个礁体位点开展了调查。我们提出了全新的3D标注与分形维数计算方法。研究结果揭示了整个群岛范围内珊瑚覆盖率、多样性以及礁体结构复杂度的空间异质性。本研究结果与该区域既往研究结论相符，同时补充了此前未被量化的礁体结构复杂度相关重要信息。 本研究公开了一套独特的数据集：Galápagos_3D，其中包含该区域的7个3D模型与超过17000张标注图像。本研究为加拉帕戈斯海域的长期监测、相关研究与保护工作提供了重要的基准参考。此类研究可推动珊瑚生态学领域在珊瑚恢复能力与韧性等方向的新发现，并为该区域乃至全球范围内的循证政策制定提供助力。