Altitudinal distribution of several eucalypt species in relation to other environmental factors in southern New South Wales

摘要: Four problems associated with studying the altitudinal distribution of eucalypt species are examined: lack specific physiological relationship between altitude and plant growth, influence other environmental factors, availability suitable data need for statistical analysis. Presence/absence were obtained from several sources. Probability occurrence in 100 m zones is determined E. maculata, muellerana, fastigata, sieberi, dalrympleana pauciflora. The factors demonstrated using direct gradient Aspect important fastigata rossii addition to rainfall. The statisical model used was logit-linear model: log (p/I– p) = linear function variables where p expected probability being present a given combination variables. Two examples presented. can be predicted altitude, rainfall, radiation index (measure aspect) an interaction term aspect. presence by geology. Altitude transformed into estimate mean annual temperature which shown clarify some overlaps distribution. It concluded that use collected purposes generalized show complex correlations exist eucalypts factors.