What you’ll learn6 learning objectivesChoose one objective for a focused lesson, or study the complete topic.18.2.1Ecology terms• Terms: ecosystem, nicheSyllabus objective18.2.2Levels of biodiversity assessment• Biodiversity assessment levels:- Number and range of ecosystems and habitats- Number of species and relative abundance- Genetic variation within speciesSyllabus objective18.2.3Importance of random sampling• Importance of random samplingSyllabus objective18.2.4Methods to assess distribution and abundance• Methods to assess distribution and abundance: frame quadrats, line transects, belt transects, mark-release-recapture (Lincoln index)Syllabus objective18.2.5Spearman's and Pearson's correlation• Spearman's rank correlation and Pearson's linear correlation: analyse relationships between variables, biotic/abiotic factorsSyllabus objective18.2.6Simpson's index of diversity (D)• Simpson's index of diversity (D): calculate biodiversity, significance of valuesSyllabus objective