Total-data

The study is conducted in northeastern China, between 39° to 54°N and 119° to 134°E. Northeastern China is identified as a priority area for biodiversity conservation because it has a significantly higher taxonomic richness than other temperate regions of the world at different taxon levels, and is considered ideal for examining spatial patterns and causes of diversity at large spatial scales. The study area spans numerous climatic zones, from the warm temperate zone in the south to the cold temperate zone in the north. Four distinct seasons result from the effect of the high-latitude East Asian Monsoons, with the main precipitation period lasting from June through September. <br> <br> The study area includes 415 plots. 18 nested circular subplots make up each plot. Starting with the smallest subplot, which has a radius of 1 m, the radius of each larger subplot increases by 1m until the radius of the largest subplot increases by 0.8 m to 17.8 m, covering an area of 1,000 m2. A SAR curve for each plot is developed using the log-log power equation. 415 z- and c-values are obtained in total. 10 climate variables, 5 soil variables and 1 biotic interactions variables are also included in the database.