BIOL 2P05 Lecture Notes - Lecture 5: Operon, Melanosome, Citric Acid
21 Apr 2018
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Document Summary
Shorebird pop have shrunk, by 70% across na ~1973. Hypothesis: climatic changes in the arctic habitat affect the (cid:271)irds" physiology in ways that may reduce their survival changes in their tropical habitats. Lack of food = smaller body mass (malnutrition) Beak length correlates w/ diet in southern habitat: only birds w/ long beaks can access the high quality & abundant food source. Body shrinkage due to arctic warming reduces red knot fitness in tropical wintering range. Climactic changes in the one habitat (arctic) causes changes in the (cid:271)irds" physiology (adaptations) that reduced their survival chances in their other habitat. Arctic: smaller bodies/shorter beaks require less nutrition: winter home: small bodies (cid:272)a(cid:374)"t reach their food. Can we predict a species ability to adapt to climate change from their genome: mismatch b/n enviro & physiology can lead to shifts in species ranges, pop declines, or even extinction ~7% The evolutionary outcomes can in part be determined by the adaptive capacity of species.
