BISC302 Lecture Notes - Lecture 8: Evaporation, Microclimate, Regional Climate Levels In Viticulture
6 Nov 2017
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A resource that is scarce relative to its demand. In addition there maybe synergistic effects of these factors: ex heat and humidity, can alter tolerances through acclimation. Isozymes, heat shock proteins: but there are limits to abilities to acclimate, the threshold effect, may also escape variables. Size and scaling are important constraints: allometry (body parts growing at different rates) Principle of allocation: all organisms must distribute their limited resources to one of life"s functions, evolutionary tradeoffs, therefore most organisms perform best under a limited range of conditions (including thermal, recall optimum ranges. Animals need energy and nutrients: herbivory vs. carnivory vs. omnivory, gut specializaitons, hindgut/foregut fermentation, coprophagy, mineral needs, esp in the spring for herbivores. Temperature: why is it stressful, temperature controls physiological activity, high temps, denature enzymes, may lead to dehydration, osmotic stresses. Low temps: slow reactions, affect properties of membranes, slowing functions, microclimate (vs. macroclimate)
