[This dataset is embargoed until March 31, 2027]. This dataset contains forest structure and microclimate measurements collected from 60 plots of 125 m² each in La Campana National Park, Chile. The forest structure data record tree identity, species, condition, canopy cover, stem and resprouting characteristics, as well as biometric variables such as perimeter, height, and diameter at breast height. Plot-level information includes elevation and tree identifiers. Microclimate data include soil moisture and temperature measured at three levels: underground, at ground level, and 30 cm above ground. These measurements provide fine-scale information on local environmental conditions within the forest. Data were collected during the 2023-2024 austral summer season using systematic field surveys and standard forestry instruments. The dataset is designed to support research into forest mortality and resilience in Mediterranean-type ecosystems, where climate stress and disturbance are key drivers of change. The resource was produced through collaboration between the University of Stirling (Scotland) and Universidad de O'Higgins (Chile), led by Prof. Alistair Jump, Dr. Sarah Greenwood, and Dr. Alejandro Venegas González. Full details about this dataset can be found at https://doi.org/10.5285/23f751c8-11af-4991-8f37-a9baef1961eb
