Lesson 12 - Alaska Geobotany Center

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Raunkiaer s biological spectraRaunkiaer used this system to catagorize all the plants in floras from different regions ofthe world.Here, we see the distribution of life forms for three very different regions, the a borealarea on the Labrador coast, a desert area in Aden, and a tropical island., Seychelles.We can see the dominance of hemicryptophytes in the north, chamaephytes in the desert,and phanerophytes with various leaf sizes in the Seychelles.The “normal spectrum” was developed from an analysis of random 1000 species from alist of world plants.PhanerophytesChamaephytesHemicryptophytesGeophytesHydrophytesTherophytesLabradorcoast111752956(borealforest)Aden(tropicaldesert)332719317Seychelles(tropicalrainforest)616<strong>12</strong>3216Normalspectrum379273113
Bioclimatic diagram showing distribution of global vegetationbased on life forms• Transparency: “Fig. 4.18. The bioclimatic diagram• after Dansereau.”
Page 1 and 2: Lesson 12: Community concepts andat
Page 3 and 4: Flora vs. vegetation?
Page 5 and 6: Physiognomy• Physiognomic approac
Page 7 and 8: Dansereau s “lollipop diagrams”
Page 9: Raunkiaer s life forms based on pos
Page 13 and 14: Plant Functional Types (PFTs)• It
Page 15 and 16: Plant Functional Types of Box (1981
Page 17 and 18: BIOME model (Prentice et al. 1992)
Page 19 and 20: Environmental constraints of the PF
Page 21 and 22: Vegetation redistribution of Europe
Page 23 and 24: Braun-Blanquet sorted Example table
Page 25 and 26: Simpson s and Shannon-Wiener s indi
Page 27 and 28: Alpha and Beta diversity• Whittak
Page 29 and 30: Phenology diagram for Acomastylis r
Page 31 and 32: Phenological diagrams ofin selected
Page 33 and 34: Productivity gradients• Fig. 8-7,
Page 35 and 36: Association Approach• Fig. 8-1, p
Page 37 and 38: Major proponents of the “discreet
Page 39 and 40: Clement s view• Clements, recogni
Page 41 and 42: Major proponents of the continuumap
Page 43 and 44: A broader view of Gleason: Nicholso
Page 45 and 46: Whittaker s data of tree species oc
Page 47 and 48: European reaction to the “Anglo-A
Page 49 and 50: Summary• Some characteristics of

Lesson 12 - Alaska Geobotany Center

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