1. Introduction

2. Datasets and tools
2.1. Catalogue of the structures
2.2. Galaxy catalogue
2.3. Tools
2.4. Spectroscopic completeness

3. Characterization of the XLSSsC N01 supercluster: the definition of environment

4. Stellar population properties versus environment
4.1. Dependence of the galaxy fractions on environment
4.2. The sSFR– and SFR–Mass relations in different environments
4.3. Luminosity-weighted age in different environments

5. Summary and discussion