BIO150_2010SUMMER_LEC01_Slide

BIO150_2010SUMMER_LEC01_Slide - Lecture 1 Bio 150 Organisms...

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Bio 150 Organisms in the environment Introduction 1. Themes in Bio 150 Lecture 1 2. Origins of evolutionary thought a) before Darwin b) after Darwin 3. How evolution is studied Professor Laurel Duquette Department of EEB (Statistics) Sidney Smith Hall 6026C Office hours: Tues and Thurs. 9-10 Central Question in Biology: Why is life so diverse? Environment Abiotic (non-living world) Biotic (living world) Environmental Variation Evolutionary Response: •change in general features of lifestyle and appearance over many generations •genetic change Ecological Response: •change in numbers and distribution of individuals over a short time period (I.e. within a single generation) •non-genetic change 1 2 3 4 5 6 Organisms respond to the abiotic and biotic environment Organismal Response to % L R W L F O L Y H L Q $ E L R W L F Z R U O G R U J D Q L V P V D V S U R G X F W R I E L R W L F D Q G D E L R W L F L Q W H U D F W L R Q
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Kudu in the Serengeti grasslands Abiotic Environment: seasonal rainfall poor soil abundant grasses few trees Biotic Environment: visual predators many competing species small female groups Response to Seasonal Rainfall Evolutionary Response: • able to digest tough Ecological Response: • large seasonal Response to seasonal rainfall drought-resistant leaves variation in population size Evolution • the processes underlying genetic response to environment Ecology • the processes underlying ecological response to environment Organisms in their environment Evolutionary Ecology • the nature of adaptation Charles Darwin (1809-1882) (age 31) Theory of Evolution • The central unifying concept of biology • Affects many other areas of knowledge • One of the most influential concepts of Western thought “Nothing in biology makes sense except in the light of evolution ” evolution. Theodosius Dobzhansky (1973) 7 8 9 1 0 1 1 1 2 h i s t h e r o y m e n d s c i n c e t o g e t h e r i e ) i n d r a u g t h , a n i m a l s d i e a n d r e p r o d u c t i v e r a t e d r o p s H o w s p e c i e s e v o l v e a n d r e s p o n s e
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2. How evolution is studied
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BIO150_2010SUMMER_LEC01_Slide - Lecture 1 Bio 150 Organisms...

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