lajimäärä
Lajimäärä, or species richness, is a measure of the number of distinct species present in a defined area, sample, or time period. It is a basic indicator used in ecology to describe the biodiversity of a community or environment. Lajimäärä can refer to local (alpha) diversity, which counts species within a specific site, or to broader scales when aggregated across multiple habitats or regions.
Measuring lajimäärä involves field surveys and compilation of species lists from observations, captures, or identifications. The
Lajimäärä is a component of biodiversity but does not capture species abundances or community evenness. Therefore
Applications include monitoring changes in biodiversity due to habitat alteration, climate change, pollution, or invasive species,