[ Target Science | Background Information ]


Adaptations of the Scrub Community




CHAPARRAL "WATER CONSERVATIONISTS"

SURVIVAL CHARACTERISTICS

Small leaves Less surface area from which water can be lost
Thick leaves Prevent leaves from "overheating". This insulation keeps leaves at a cooler temperature, slowing transpiration.
Waxy coating Serves as a barrier to water loss.
Grey green reflecting
(dark tops, light undersides)
Reflect light and heat from leaf surface, reduce loss of water.
Stomates on undersurface of leaf Water is lost through pores (stomata) which are located on the lower surface and help keep the leaf cool.
Downcurved leaves Trap water vapor and slow down the rate of water loss ("wet suit" effect).
Hairs on leaves Trap water vapor and slow down the rate of water loss.
Hairs on stems Create air boundary layer, slow down air flow around plant, trap water vapor and slow down rate of water loss.
Aromatic oils Bind water in large molecules to reduce amount of free water in tissue. Reduce water loss.


Chaparral:A Forgotten Habitat Resource Unit is a part of LAEP Learning Exchange.
Copyright © 1997 Target Science, target@laep.org Updated May 1999. Target Science is sponsored by LAUSD and LAEP.
315 W. 9th St., Suite 1110, Los Angeles, CA 90015. Ph: (213) 622-5237. FAX: (213) 629-5288.
HTML by Jennie Malonek, teacher, Alhambra High School