This dataset consists of data collected during a field experiment that took place from the beginning of June to the end of September 2020, covering the entire growing season. This experiment was conducted in the former mining area of Sentein (department of Ariège, South West of France, 42°49'30.3 "N, 0°53'53.3 "E), located at 2000m altitude at the subalpine belt of the Pyrenees Mountains on a calcareous rock.

This dataset contains “Block, Habitat, Species, Ecotype and Neighbouring” as explanatory categorical variables and “Target survival” as binomial response variable.

This data was analyzed in order to understand the importance of species and ecotypes stress-tolerance in competitive and facilitative responses to neighbours along metal-pollution gradients, and to assess both the effect of neighbours at different stress levels and the effect of metallic stress with and without neighbours.

All data were stored using Microsoft Excel and all the statistical analyses were done using R software (R Core Team 2016).