Download presentation
Presentation is loading. Please wait.
Published byAubrey Terry Modified over 9 years ago
1
Biodiversity By: Adrian Gomez
2
Types of Diversity Genetic diversity-involves the range of all genetic traits, both expressed and recessive Species diversity- # of different species that inhabit a specific area Ecosystem diversity- range of habitats that can be found in defined area composed of both biotic and abiotic components
3
Natural Selection How organisms evolve Shows what organism has adapted, survived, reproduced, and pass it on to off springs in new environment Without a change in environment, evolution nor natural selection would occur
4
Stabilizing Selection Affects the extreme of the population Most common from of natural selection Individuals that deviate too far from normal conditions are removed
5
Directional Selection Affects the extreme of the population Do very well in future generations
6
Disruptive Selection Acts against individuals that have the avg condition Favor individuals at the extreme ends Population is almost split in two Evolution occurs
7
Evolution Change in the genetic composition of a population during successive generations as a result of natural selection acting on yhe genetic variations among individuals and resulting in the development of new species
8
Speciation When segments of a population of one species become so isolated that gene flow stops 3 types of adaptive radiation: General radiation-species develop new abilities to reach new parts of the environment Environmental change-species that can survive in radically changed environment and branch into new species Geographic isolation-isolated ecosystems can be colonized by a species that undergoes rapid evolution
9
Convergent Evolution Process whereby organisms not closely related to each other independently acquire characteristics while evolving in separate and sometimes varying ecosystems
10
Parallel Evolution When 2 species evolve together at the same time and in the same ecosystem and acquire similar characteristics
11
Ecological Succession
12
Extras 2 links http://plato.stanford.edu/entries/b iodiversity/ http://plato.stanford.edu/entries/b iodiversity/ http://www.nwf.org/Wildlife/Wild life-Conservation/Biodiversity.aspx http://www.nwf.org/Wildlife/Wild life-Conservation/Biodiversity.aspx Video link http://youtu.be/3JeYaFGYOSM
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.