Body Mass, grams

1. Chapters now on line links on the class web page athttp://www.zo.utexas.edu/courses/bio301/chapters/

2. Plant Life FormsEvergreen vs. DeciduousMonolayered vs Multilayered plantsShade ToleranceXerophytic vs. Mesophytic leavesAlso Hydrophytes (water lilies)Creosote Bush Larrea divaricataMesquite Prosopis -------

3. Physiological EcologyHomeostasis: maintenance of a relatively stable internal state under a much wider range of external environmental conditionsTemperature regulation (thermoregulation)Physiological Optima and Tolerance CurvesAcclimation

4. Energetics of Metabolism and Movement Ingestion = Assimilation + Egestion Assimilation = Productivity + Respiration Productivity = Growth + Reproduction Ingestion = Egestion + {Respiration + Growth + Reproduction} {Assimilation}------------------------------------------------Homeotherm versus Poikilotherm Ectotherm versus Endotherm

5. Body Mass, grams

11. Metabolic Cost of Movement

12. Adaptation and Deterioration of Environment Ronald A. Fisher Non-directed (random) changes in either A or B are equally likely to reduce the level of adaptation (d ) when small, but as the magnitude of undirected change increases, the probability of improvement diminishes. Duality of Fisher’s model (A and B can be interchanged)

13. Water Economy in Desert OrganismsOther Limiting MaterialsSensory Capacities and Environmental CuesAdaptive SuitesDesign Constraints

14. Heat Budgets and Thermal Ecology

16. Passive thermoconformer Nephrurus laevissimus

17. Active Thermoregulator Ctenophorus isolepis

18. Active Thermoregulator Ctenophorus isolepis Thermoconformer

20. Ctenotus leae Ctenotus piankai

21. Australian Ctenotus skinks

22. Australian skink: Ctenotus brooksi

23. Australian skink: Ctenotus leae

24. Australian skinks: Ctenotus piankai and Ctenotus helenae

25. Phrynosoma asio (Mexico)

26. Ecological Equivalent Thorny Devil Moloch horridus (Australia)

27. Phrynosoma platyrhinos

29. Ctenotus leae Ctenotus piankai

30. Ctenotus leae Phrynosoma Moloch Ctenotus piankai Slope