Biology 152 - Ecology Exam 2023 WITH VERIFIED ANSWERS

ecology the scientific study of the interactions between organism and the environment; the study of the distribution and abundance of species It seems highly likely that rainfall amount influences forest growth but how would you design an experiment to test this hypothesis? Put shelters over parts of a forest to create low rain treatments limitations to distribution dispersal, behavior, biotic factors, abiotic factors examples of abiotic factors that could limit distribution chemical factors such as water, oxygen or pH and physical factors such as temperature, light, or soil structure what temperature would the earth's surface be without green house gasses -18 degrees Celsius what temperature is the earth's surface because of green house gasses 15 degrees Celsius explain the green house gas effect The sun sends waves to the earth, these waves are either reflected of the earth's surface or absorbed by the earth's surface. The waves reflected off are long-wave radiation, and they are sometimes absorbed by green house gasses (such as H2O, CO2, and CH4) and re-emitted in many directions; some of these go back to the earth's surface and help heat it. how much sunlight is reflected off the earth's surface 30% albedo back-scatter short-wave radiation off the earth's surface why do we need the cosine correction the earth is tilted at 23.5 degrees explain why the equatorial area is tropical but just 30 degrees above/below is arid (lecture 3) moist air turns to rain over in the tropics and all the dry air that's left circles up/down define each variable for this equation M + Q = R + C + E + G + S M= metabolism Q= radiations absorbed by the organism R= electromagnetic radiation emitted by the organism C= heat lost through convection (wind) E= transpiration (sweating) G= conductance S= storage