BIOEE 1610 1st Edition Lecture 1Outline of Current Lecture I. NewsII. ConditionsA) TemperatureB) SalinityCurrent lectureI. News-still have openings for writing in the majors-The mean of the pretest is 43%-Today: conditions and resources, next lecture: photosynthesisII. Conditions- Definition: physical/chemical aspects of the environment that affects organisms, generally not consumed (temperature, humidity, pH)A) Temperature-Life can exist typically between a little less than 0 and about 105 degrees Celsius-The response curve of temperature to performance of species is often bell-shaped-The trend is that warmer temperatures generally increase biodiversity *One exception is a few meters under the ocean surface: Cold but with high biodiversity*Why? Temperature correlates with disturbance; also the ocean has few resources which means high biodiversity-Adaptation to temperature*Polar: gain heat (thick fur)*Tropical: Lose heat (evaporation through leaves)*Desert: Need to lose heat, but can’t afford to lose water (reflective coloring)*Temperate zone trees often drop leave, animals hibernate (European ground squirrel)These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.-The actual temperature distribution will always be less than their potential distribution*Competition-Temperature can affect infection with parasites-Climate change*How will warmer temperatures affect species interactions?B) Salinity-Response curve: Usually like a bell curve, but it is flat at the top and stepper to the leftside-Saltwater fish are less salty than the water (excrete excess salt)-Freshwater fish are more salty than water (excrete excess water)-Most invertebrates have similar salt content to the water around
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