L13+Biodiversity+and+Its+Significance+_Ko

L13+Biodiversity+and+Its+Significance+_Ko - Biodiversity...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Biodiversity and Its Significance National Geographic
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Lecture Outline z What is Biodiversity ? z Three kinds of Biodiversity 1. Genetic Diversity 2. Species Diversity 3. Ecological Diversity z How many species are there? z Biodiversity Hot Spots z How do we benefit from diversity?
Background image of page 2
What is Biodiversity? Biodiversity = Bio logical Diversity (the variety of living things) Three kinds of biodiversity 1. Genetic diversity 2. Species diversity 3. Ecological diversity National Geographic
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1. Genetic Diversity Genetic Diversity = The variety of versions of the same genes within individual species (gene: a unit of heredity) z Higher genetic diversity (more types of the same gene) z Populations can better adapt to changing environment z Higher chance that at least some individuals of the species can adapt to environmental changes z Higher chance for the species to reproduce and continue the population
Background image of page 4
2. Species Diversity Species Diversity = The number of different kinds of organisms within individual communities or ecosystems The world’s largest flower, the flesh flower ( Rafflesia arnoldi ). (http://www.science.siu.edu) Cunningham & Cunningham (2008)
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3. Ecological Diversity z Niches (roles of species in an ecosystem) z Trophic levels z Ecological processes that capture energy, sustain food webs, and recycle materials Ecological Diversity = The richness and complexity of a biological community, including the number of WWF
Background image of page 6
How Many Species Are There? z Known: ~1.5 million z ~70%: Invertebrates (animals without backbones/ vertebrae) z Examples: I nsects , sponges, clams, worms z Estimation: 3-50 million
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Biodiversity Hot Spots: Rich and Threatened Biodiversity Hot Spot is a region that meets both of the following criteria 1. Contains 1,500 endemic plant species (0.5% of the world’s total) (endemic: found nowhere else in the world) 2. Has lost 70% of its original habitat
Background image of page 8
Most of the world’s biodiversity are near the equator , especially tropical rainforests and coral reefs. z North America and Europe: 10% - 15% only Biodiversity hot spots. Numbers represent estimated endemic (locally unique) species.
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 34

L13+Biodiversity+and+Its+Significance+_Ko - Biodiversity...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online