BIO120H1 Lecture Notes - Lecture 2: Antifreeze Protein, Ice Nucleus, Ice
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BIO120H1 Full Course Notes
Verified Note
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Document Summary
Distribution limits + responses to climate change depend on their performance, which varies as the environment shifts from optical to extreme conditions. Distribution limits: depend on biotic + abiotic environmental factors. Adaptations + energetics: limit size of optimal enviro + range of enviro between critical limits. Performance curve diagram that shows variation in fitness between enviro (abiotic) factors that define critical limits. Correlated measures of org"s performance are used as indirect measure. Performance = max fitness under range of optimal temp. = decline to 0 just beyond upper + lower critical temp. Critical temp defines org"s thermal tolerance range. Critical thermal limits: breadth of temp that org can tolerate @ short exp. Only survive short periods in conditions that exceed a threshold in their critical tolerance limits . 2 metrics: upper + lower lt50 or ctmax and ctmin. Eurythermal: org"s have wide thermal breadth, live in wide range. Categorize animals based on their thermal interactions with the environment.
