Georeferenced lichen transplant monitoring dataset from urban environments (2016–2017)

This dataset contains georeferenced environmental and visual data from a lichen transplant monitoring study conducted in 2016–2017.
Lichen transplants of Hypogymnia physodes were collected in a forest area outside the city (Mežciems, control site) and installed on trees at multiple urban locations in July 2016. The first field survey was carried out on 1 August 2016, followed by repeated monitoring campaigns until March 2017.
The dataset includes information on the exact location of each sampling site, tree species used as transplant substrates, and surrounding urban land-use structure.
For each sampling site, the dataset provides:
• Geographic coordinates in WGS84 (DMS format),
• Street-based location description,
• Tree species (Latin names) on which lichen transplants were installed,
• Urban land-use composition (%) within the surrounding area, including residential, industrial, commercial, green, and water-related land-use types,
• Photographic documentation from repeated field surveys, including:
Close-range images of lichen transplants showing visual condition and necrosis,
360-degree panoramic images documenting the surrounding environment at each site.
The dataset includes multiple monitoring campaigns carried out between August 2016 and March 2017. Notes on transplant degradation, loss, replacement, and physical disturbances (e.g., branch cutting) are included in the metadata tables where applicable.
The dataset is intended for reuse in urban environmental studies, lichen bioindication research, spatial analysis, and visual assessment of urban impact gradients. Detailed methodological descriptions are not included in this dataset and will be provided in a separate scientific publication.

本数据集包含2016—2017年开展的地衣移植监测研究中的地理参考环境与视觉数据。
研究以梅兹切姆斯（Mežciems）市外围林区为对照样点，采集了裸孔地衣（Hypogymnia physodes）的移植样本，并于2016年7月将其定植于多个城市点位的树木之上。首次野外调查于2016年8月1日开展，后续持续开展多轮监测工作直至2017年3月。
本数据集涵盖各采样点的精确位置、作为移植基质的树木种类，以及周边城市土地利用结构等相关信息。
针对每个采样点，数据集提供如下内容：
• 采用WGS84坐标系的地理坐标（DMS格式）
• 基于街道的点位描述
• 定植地衣移植样本的树木种类（拉丁学名）
• 周边区域内各类城市土地利用类型的占比（%），涵盖住宅、工业、商业、绿地及与水体相关的土地利用类型
• 多次野外调查获取的影像资料，具体包括：
记录地衣移植样本外观状况与坏死情况的近距影像
记录各采样点周边环境的360°全景影像
本数据集包含2016年8月至2017年3月期间开展的多轮监测工作内容。元数据表中会记录移植样本的退化、丢失、更换情况，以及诸如树枝修剪等物理干扰相关的备注信息（如适用）。
本数据集旨在供城市环境研究、地衣生物指示研究、空间分析以及城市影响梯度视觉评估等领域二次使用。本数据集未包含详细的方法学描述，相关内容将在后续正式科学出版物中另行发布。