BIO 373 1st Edition Lecture 1 Outline of Last Lecture I n a Outline of Current Lecture I Population Decline a Case study on deformity in amphibians II Experimental Design III Ecology Maxims Current Lecture Population Decline Case study on deformity in amphibians 1995 o 40 deformed o Deformities coincided with population decline o Ask what causes the deformities A hypothesis Climate change predator prey interaction change environmental factors Experimental Design Observational study o Can be difficult less conclusive if based purely on observation Experimentation o Can be repeated results are more definitive o Observe manipulate variables replicate collect a data set statistics Replication helps eliminate random variables confounding factors environmental variation etc Ecology Maxims 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 Ecology study of interaction between organisms and environment o You can never do just one thing Everything is connected everything has an effect on something else different factors interact o Everything goes somewhere Flow of energy and nutrient cycling o No population grows forever There are environmental and special limitations Available energy versus consumption o There is no free lunch When one thing improves something else has to give Inverse relationships o Evolution matters understanding change Survival mutations adaptation natural selection Ex antibiotics and bacteria o Time matters Ecosystems and organisms change and grow overtimes Changes may be cyclical seasonal linear Can occur quickly or over a long period of time o Space matters For example temperature and precipitation over an area o Life would be impossible without species interaction Food webs energy exchange cycle of life habitat
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