UNI101Y1 Study Guide - Phototroph, Chemotroph, Omnivore
16 Feb 2013
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Bio120h lisa zhao 2011 | page 2. Ccoonnttiinnuuuumm: a gradient of envmtal characteristics or of change in the composition of communities. Ggrraaddiieenntt aannaallyyssiiss: the plotting and interpretation of the abundance of species along an envmtal gradient. Gradient: ex. moisture, temp. , salinity, exposure, light level. Puts to rest clements" view of extreme closed communities. Whittaker found that dominant trees in the great smoky mountains of tennessee have distinct but partially overlapping ecological distributions on a gradient. Measur es o f c o mmun it y str uct ur e in c lude n umb er s o f spec ies a n d. Ssppeecciieess rriicchhnneessss: a simple count of the number of species in an area. More species live in tropical regions than temperate and boreal. One way to partition species is according to their feeding relationships. Ttrroopphhiicc lleevveellss: a position in a food web, determined by the number of energy transfer steps from primary producers to that level.
