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PDF - CES (IISc)

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CONTENTS xvii<br />

CHAPTER IX<br />

ECOLOGY<br />

PAGE<br />

A. GENERAL INTRODUCTION .* 356<br />

B. EXTERNAL INFLUEN<strong>CES</strong> . . .<br />

"<br />

. . . 357<br />

a. Temperature<br />

b.<br />

c.<br />

d.<br />

Humidity<br />

Wind<br />

Human Agency<br />

C. LICHEN COMMUNITIES 362<br />

1. ARBOREAL 363<br />

a. Epiphyllous<br />

b. Corticolous<br />

c. Lignicolous<br />

2. TERRICOLOUS 367<br />

a. On calcareous soil<br />

b. On siliceous soil<br />

c. On bricks<br />

d. On humus<br />

e. On peaty soil<br />

/ On mosses<br />

g. On fungi<br />

3. SAXICOLOUS 371<br />

a. Characters of mineral substrata<br />

b. Colonization on rocks<br />

c. Calcicolous<br />

4 . OMNICOLOUS<br />

d. Silicicolous<br />

LICHENS 376<br />

5. LOCALIZED COMMUNITIES 378<br />

a. Maritime lichens<br />

b. Sand-dune lichens<br />

c. Mountain lichens<br />

d. Tundra lichens<br />

e. Desert lichens<br />

f. Aquatic lichens<br />

D. LICHENS AS PIONEERS .<br />

a. Soil-formers<br />

b. Outposts of vegetation<br />

....<br />

CHAPTER X<br />

ECONOMIC AND TECHNICAL<br />

392<br />

A. LICHENS AS FOOD 395<br />

a. Food for insects<br />

b. Insect mimicry of lichens<br />

c. Food for the higher animals<br />

d. Food for man

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