#3 - Physical Environment

#3 - Physical Environment - What were the major points made...

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1 What were the major points made in the required outside reading article? Darwinian fishery science: lessons from the Atlantic silverside ( Menidia menidia ) The physical environment: Factors that set limits on the distribution of organisms (and thus on the nature of communities) Some influential “ primary ” factors (the text calls them “conditions”) • Temperature • Relative humidity • Salinity • pH • [conc] of “pollutants” • Can you think of any others? Some influential “ secondary ” factors • Nutrients – Ca, P, K, N. .. • Water • How are these different from the primary factors?
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2 • Why is reproduction the first attribute to be lost as conditions deteriorate? • Is this “mandatory”, or could an organism find a way around this? Temperature • Individual organisms respond to temperature in the manner described by the plot shown at the upper right (mostly) – Lethal upper and lower bounds – some intermediate optimum Hardiness zones for plants in North America
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#3 - Physical Environment - What were the major points made...

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