GEO 446LEC Lecture Notes - Lecture 3: Ilex Aquifolium, Altitudinal Zonation, Clinton Hart Merriam
15 Mar 2019
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Document Summary
As the global climate changes, human well-being, ecosystem function, and even climate itself are increasingly affected by the shifting geography of life. Alexander von humboldt was the first to report the altitudinal zonation of vegetation after his expedition in latin america. Humboldt"s plant zonation along the altitudinal gradient of the chimborazo. Alexander von humboldt & aim bonpland at the foot of the chimborazo. Animals and plants are distributed in circumpolar belts or zones, the boundaries of which follow lines of equal temperature rather than parallels of latitude . Alexander von humboldt also related the altitudinal zonation of vegetation to the circumpolar belts or zones suggesting isotherms as natural boundaries to species distribution von humboldt & bonpland (1807); maps from woodbridge (1823) based on von humboldt s isotherms. Reproduction of holly (ilex aquifolium) coincides very closely to the 0 c-january isocline. Iverson (1944) redrawn in gaston (2003); walther (2005)
