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Geo2:Chapter 3
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Ranges of tolerance
-determine where on earth that species may be found, and species with wide ranges of tolerance will be most widely distributed
Ecological optimum
-refers to the environmental conditions under which a species will prosper
Heliotropic (Solar-tracking) plants
-change position during the day to increase/decrease exposure to light
-Ex. Sunflower
Phenology
-study of seasonal patterns of plant and animal life
Phodoperiodism
relationship between phenology and light
Temperature stress: Decidous plants
-shed their leaves/needles all at the same time
Temperature stress: Evergreen plants
-replace their leaves/needles gradually
Seasonal dimorphism
-large leaves at winter and small leaves at summer
Poikilotherm
-animal whose temperature varies
Ex. cold-blooded, fish, reptiles
Homeotherm
-animal that maintains stable internal body temperature
-Ex. warm-blooded mammals
Hibernation
spending winter in a dormant condition
Estivation
spending summer in a dormant condition
Ex. Crocodile
Bergmann's Rule
-the body size of the subspecies increases with the decreasing temperature of its habitat
Allen's Rule
-animals that live in cold climate have shorter extremities, such as ears, than related species that live in warm climates
-Ex. artic fox has tiny ears to conserve body heat in a cold environment
-Ex. desert fox has large ears ,the better to radiate away body heat
Sclerophyll
a plant with tough leathery evergreen leaves
adaption to reduce transpiration
small stomata
Xerophytes
plants adapted to a dry environment
Succulents
plants that have enlarged leaves and stems that contain-water holding tissue
-Ex. Prickly-Pear Cactus
Hygrophyte
water tolerant plant that requires a saturated or semisaturated environment
-Ex. Mangroves
Hyrophytes
plants that grow in or under water
-Ex. Lily
Stenohaline
organisms can tolerate small range of salinity change
-Ex. open-ocean organisms
Euryhaline
organisms can tolerate large range of salinity change
Ex. Coastal-water organisms
Halophytes
salt tolerant species
Calciphiles
plants tolerant to calcium limestone
habitat
an environment where an organism lives
Ecological Niche
the combination of role and habitat for a particular species
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Author
dante01
ID
198340
Card Set
Geo2:Chapter 3
Description
study
Updated
2013-02-06T10:13:45Z
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