BIO 2129 Lecture Notes - Thrips, Biological Interaction, London Academy Of Music And Dramatic Art
Document Summary
The abundance of species: abundance: number of organisms, density: abundance per unit area, population density varies through time and across spatial gradients. Predicting species abundance: n = f (environmental conditions, n (abundance, pop growth (demographic factors, nt = nt 1 + birth mortality + immigration -emigration. Prediction of abundance (based on enrivo conditions: spatial variation (correlation observed for different locations) In other cases, habitat characteristics allow for predictions of abundances. Abundance of the deer tick, the vector of lime disease: higher around water bodies, helps to predict where we"d see lime diease. 69% variation in tick abundance was explained by wetlands, urban area, soil moisture: this is an estimate of how strong predictions are (if r2=1, predictions are perfect) Thrips on rose bushes: temporal variation, y = # thrips per rose, can predict thrip abundance well with simple environmental factors. In other cases, population dynamics depend on biotic interaction s and their temporal variation.
