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Red light eg green algae deeper waters species that

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Unformatted text preview: low waters: species that use chlorophylls (use red light) (e.g., green algae) deeper waters species that use carotenoids (use blue-green light) (e.g., red algae) Tolerance functions: variation in width Homeotherms (e.g., birds, mammals): use metabolic energy to maintain nearly constant body temp. Resting Metabolic Rate Thermal Neutral Zone: range of environmental temps. at which regulation of body temp. can be done with resting metabolic rate TNZ Outside TNZ: temp. regulation requires increase in resting metabolic rate (can reach 2-3 times resting rate) rate of O2 consumption Ambient Temperature White-tailed Ptarmigan Ambient Temperature Tolerance functions: variation in width TNZs for tropical and arctic spp.: tropical species Arctic species environmental temperature (C) Organisms: shaped by selection under conditions they encounter regularly Effects of climate change? Assigned reading: Tewksbury et al. 2008 Acclimatization: - short-term (within lifetime) physiological adjustment to change in environment; - reversible Ex: change in temp. of peak photosynthesis according to rearing temperature Other types of reversible physiological adjustment: torpor: short-term reduction of metabolic rate (e.g. over night) Body Temp.39°C lots of nectar 12-17°C Night Day scarce nectar 39°C Hibernation (winter) / Estivation (summer): mid-length reduction of metabolic rate (weeks/months) adaptation to deal with resou...
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