IndividualsTeperature RelationsMostspeciesperformbest in a fairlynarrowrangeof temperatures.162003.10.24
2003.10.24 16 Individuals Temperature Relations What is ecology ❖ Most species perform best in a fairly narrow range of temperatures
IndividualsTeperatureRelationsTemperature and performanceat the Molecular Level172003.10.24
2003.10.24 17 Individuals Temperature Relations What is ecology ➢ Temperature and performance at the Molecular Level
IndiidualsTeperatureRelationsAcetyleholinesterase of troutAcetylcholinesteraseof troutheld at 2°C shows highestheld at 17Cshows highestaffinity forits substrate at 2°Caffinityforits substrateat17CHigheeniEnzymefromtroutheld at 17°CEnzyme fromtroutheld at2°CLow0102030Temperature (C)FIGURE4.8Temperatureand enzyme activity Cdatafrom Baldwin andHochachka 1970182003.10.24Acetylcholinesterase
2003.10.24 18 Individuals Temperature Relations What is ecology Acetylcholinesterase
IndividualsTeperature RelationsExtremeande TemperaturesPhotosynthesis192003.10.24
2003.10.24 19 Individuals Temperature Relations What is ecology ➢ Extreme Temperatures and Photosynthesis
IndividualsTemwerature RelationsA desert shrubA mossfromaborealforestphotosynthesizes at aphotosynthesizes atamaximumrate at44Cmaximumrate at15C10080Desert shrube(nixejo%)604020Boreal mossO-1001020930405060Temperature (C)FIGURE4.9Temperature and photosynthesis (data from Kallio and2003.120Karenlampi1975,Pearcy andHarrison1974)
2003.10.24 20 Individuals Temperature Relations What is ecology