ECOL 1000 1nd Edition Lecture 20Outline of Last Lecture I. Paul CoxII. Biodiversitya. Geneticb. Speciesc. EcologicalIII. Taxonomic groups with the highest biodiversityOutline of Current Lecture II. Tropical BiodiversityIII. Why care about diversity?a. Nature’s medicine cabinetIV. Components of DIversityCurrent Lecture- Tropical Diversityo Why is there high tropical biodiversity? Diversity increases without limit over time- Tropical habitats have more time than temperate and arctic habitats to accumulate more species Diversity reaches an equilibrium in which factors adding species balance factors removing species- In the tropics, factors adding species occur at a faster rate than factors removing species Trees and amphibians are influence by the moisture gradient from east towest Reptiles are influenced by the temperature gradient from south to north- Why care about biodiversity?o Biodiversity benefits humans and other specieso Natures medicine cabinet Ehtnobotany: the study of the relationships existing between people and plants, focusing on understanding how plants are used and managed across different societies and cultures Healers use medicine derived from plants and insects to treat and cure diseaseThese 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. i.e. foxglove (flower) produces digoxin which is uses to help heart disease Madagascar periwinkle (flower) produces choroquine to help cure malaria- Diversity has both regional and local componentso Can be measured at a variety of spatial levels: Local diversity (alpha diversity) is the number of species in a small area of homogeneous habitat Regional diversity (gamma diversity) is the total number of species observed in all habitats within a barrier-free geographic areao Biodiversity hotspots: areas with high endemism and
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