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Sampling and Comparison
Association between Species
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absence abundance amount analysis appear applied approach appropriate association average axes axis block calculated centred classes classification coefficient compared comparison composition consideration considered containing correlation corresponding cover curve defined density depends derived determined discussed distance distribution division Ecology effect environmental factors equal error estimate examined expected factors field frequency further give given gradient greater groups important increasing independent indication individuals interpretation involved less limited maximum mean measure method nearest normally objective observed obtained occurrence ordination pairs particular pattern percentage plant plotted points position possible practical present principal component probability procedure proportion quadrat quantitative random range ratio recorded reference relation relationship relative represented samples scale significance similar single soil species squares standard stands strategy suggested technique transect unit variables variance vegetation weighting