BIO120H1 Lecture Notes - Lecture 17: Saguaro, Mesophyte, Sclerophyll
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BIO120H1 Full Course Notes
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Especially challenging b/c can"t evade stress by moving. Solve problems by growth and development, carbon balance crucial. Ex) prickly pear cactus: leaved modded into thorns. Cacti have extensive root system , but shallow. Pleats in trunk allow expansion (like accordion) Can absorb 800l of water from 1 storm and use gradually. Mnemonic= david grundman (branches heavier than thought. Deciduous habitat-dropping leaves during dry or cold seasons can reduce water stress and tissue damage. Evergreen: most important land plants are angiosperms and conifers. Evergreen loose synonym for conifer : not all conifers are evergreen, many evergreens are not conifers. Turbulent flow- produced by rough edges and regularities. Animal example: arctic hare- preserve laminar, jackrabbit- create turbulent flow. Nurse tree effect- saguaro cactus seedling sheltered by palo verde. Epiphytes- plant that typically grows attached to another plant, not inground. Don"t have access to soil (no water storage bank) Costa rica epiphyte large root mass on bottom, very close together.
