Sept 9-08 - Diversity & Bacteria Lecture

Sept 9-08 - Diversity & Bacteria Lecture - Josh...

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Josh Bovard Biology 111 – Tuesday, September 9 th , 2008 Professor Graham Bell D IVERSITY AND B ACTERIA Diversity : Naming Species About 1.5 million species are named Of the 13,000 species newly named every year, 3,000 are synonyms (duplicate names) Probably all mammals, birds and fish have been named; however there are still many unnamed insects Total number of species Between 7-10 million species (although it can range from 3-100 million, with the lower limit more likely) Scientists have no real clue how many bacteria exist due to their rapid mutations and reproduction Extinction Probably 99.5% of all species that ever lived are now extinct Habitats Most of the plant species are found in the tropics Animals are more commonly found in the warmer climate (more animals are suited to the warmer, more humid climate In general, doubling the area increases diversity by 10-25% A warmer, wet climate commonly have more species This may be because of the increased energy (warmer) and the abundance of water; both are essential to life It is interesting to wonder why evolution has favoured insects, especially beetles Does life really need all the different insects and beetles?\ Types of diversity: Numeric Diversity number of species
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Sept 9-08 - Diversity & Bacteria Lecture - Josh...

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