Rao's quadratic diversity

Remotely sensed spatial heterogeneity as an exploratory tool for taxonomic and functional diversity study

Assessing biodiversity from field-based data is difficult for a number of practical reasons: (i) establishing the total
number of sampling units to be investigated and the sampling design (e.g. systematic, random, stratified) can be
difficult; (ii) the choice of the sampling design can affect the results; and (iii) defining the focal population of
interest can be challenging. Satellite remote sensing is one of the most cost-effective and comprehensive approaches

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