Some notes on tolerance curves and the ecological niche

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Some notes on tolerance curves and the ecological
niche
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(No Transcript)
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Short-term shifts physiological
adaptation Seasonal changes
acclimatization Developmental changes (E. Werner
(1984)) ontogenetic niche
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Wilsons warbler summer distribution
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Wilsons warbler winter distribution
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Physiological acclimatization or adaptation
Acclimatization effects on final rectal
temperature, heart rate, and sweat rate, for a
group of men exposed daily to 2 hr of hard work
in a hot environment. (after Leithead CS, Lind
AR. Heat Stress and Heat Disorders. 1964.
Philadelphia, Pa. FA Davis Co, 304)
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EMILI GARCÍA-BERTHOU Ontogenetic Diet Shifts and
Interrupted Piscivory in Introduced Largemouth
Bass (Micropterus salmoides) Internat. Rev.
Hydrobiol. 87 2002 4 353363
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A graphical representation of the niche (sensu
Hutchinson).
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• Fundamental niche full range of environmental
  conditions, biological and physical, under which
  a species can exist.
• Stable population size or growth
• Realized niche that aspect of the hypervolume
  to which a species is most highly adapted.

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Blue-grey gnatcatchers
2-dimensional feeding niche
fundamental