biodiversity unit 3 environmental science 1. what is diversity? diverse: differing from one another;...
TRANSCRIPT
![Page 1: Biodiversity Unit 3 Environmental Science 1. What is diversity? Diverse: differing from one another; composed of distinct or unlike elements or qualities](https://reader036.vdocument.in/reader036/viewer/2022062309/5697bf7c1a28abf838c83e00/html5/thumbnails/1.jpg)
Biodiversity
Unit 3
Environmental Science 1
![Page 2: Biodiversity Unit 3 Environmental Science 1. What is diversity? Diverse: differing from one another; composed of distinct or unlike elements or qualities](https://reader036.vdocument.in/reader036/viewer/2022062309/5697bf7c1a28abf838c83e00/html5/thumbnails/2.jpg)
What is diversity?
Diverse: differing from one another; composed of distinct or unlike elements or qualities Diversity: the condition of being diverseBiodiversity: Biological diversity in an environment indicated by number of different species of plants and animals
![Page 3: Biodiversity Unit 3 Environmental Science 1. What is diversity? Diverse: differing from one another; composed of distinct or unlike elements or qualities](https://reader036.vdocument.in/reader036/viewer/2022062309/5697bf7c1a28abf838c83e00/html5/thumbnails/3.jpg)
Why is there diversity?
Charles Darwin came up with the concept of “Law of Natural Selection” – meaning only the fittest survive
If only the fittest survive – why so much diversity?
Over time organisms develop a niche in the environment – they serve a purpose and in turn the environment needs that organism to function
![Page 4: Biodiversity Unit 3 Environmental Science 1. What is diversity? Diverse: differing from one another; composed of distinct or unlike elements or qualities](https://reader036.vdocument.in/reader036/viewer/2022062309/5697bf7c1a28abf838c83e00/html5/thumbnails/4.jpg)
Why is there diversity?
If only the strong survive, why are there so many organisms?
Three reasons:1. Because of niches
2. Geological separation
3. Environmental factors
![Page 5: Biodiversity Unit 3 Environmental Science 1. What is diversity? Diverse: differing from one another; composed of distinct or unlike elements or qualities](https://reader036.vdocument.in/reader036/viewer/2022062309/5697bf7c1a28abf838c83e00/html5/thumbnails/5.jpg)
Why is there diversity?
Niches:Niches are jobs or roles an organism has in a particular ecosystemIf two organisms are competing for the same niche the weaker organism will “lose” – this is simply called competitionAn exotic or invasive species has no competition or predators and can overtake and/or destroy an ecosystem
![Page 6: Biodiversity Unit 3 Environmental Science 1. What is diversity? Diverse: differing from one another; composed of distinct or unlike elements or qualities](https://reader036.vdocument.in/reader036/viewer/2022062309/5697bf7c1a28abf838c83e00/html5/thumbnails/6.jpg)
Why is there diversity?
Geologic separationFor example, the same species may be separated by migration, plate tectonics, etc and adapt to a new environment and as a result a new species forms
Environmental reasons
The warmer and wetter the climate the more diversity it can hold because there is less fluctuation in conditions
![Page 7: Biodiversity Unit 3 Environmental Science 1. What is diversity? Diverse: differing from one another; composed of distinct or unlike elements or qualities](https://reader036.vdocument.in/reader036/viewer/2022062309/5697bf7c1a28abf838c83e00/html5/thumbnails/7.jpg)
The Importance of Diversity
Biodiversity is important to human survival
For example, was seen in the potato famine of the 1840’s – only a few species of potatoes were planted and when a fungus killed off the potatoes 2 million people died of hunger and disease
![Page 8: Biodiversity Unit 3 Environmental Science 1. What is diversity? Diverse: differing from one another; composed of distinct or unlike elements or qualities](https://reader036.vdocument.in/reader036/viewer/2022062309/5697bf7c1a28abf838c83e00/html5/thumbnails/8.jpg)
Importance of Diversity
Reasons for preserving biodiversity
All life has a right to exist
Variety adds enjoyment to life
Diversity brings stability to our biosphere
Diversity has economic and medical value
Modern agriculture is tied to biodiversity
![Page 9: Biodiversity Unit 3 Environmental Science 1. What is diversity? Diverse: differing from one another; composed of distinct or unlike elements or qualities](https://reader036.vdocument.in/reader036/viewer/2022062309/5697bf7c1a28abf838c83e00/html5/thumbnails/9.jpg)
What effects biodiversity?
Competition is when two organisms are competing for similar resources – they both fill the same nicheWhen two organisms are in the same niche resources become scarce one or both organisms become effected
![Page 10: Biodiversity Unit 3 Environmental Science 1. What is diversity? Diverse: differing from one another; composed of distinct or unlike elements or qualities](https://reader036.vdocument.in/reader036/viewer/2022062309/5697bf7c1a28abf838c83e00/html5/thumbnails/10.jpg)
What effects biodiversity?
Adaptation effects biodiversity by increasing it – an organism that is adapted to a variety of environment is less limited in where it can live – that is one of the reasons why there are so many humans on the planet
![Page 11: Biodiversity Unit 3 Environmental Science 1. What is diversity? Diverse: differing from one another; composed of distinct or unlike elements or qualities](https://reader036.vdocument.in/reader036/viewer/2022062309/5697bf7c1a28abf838c83e00/html5/thumbnails/11.jpg)
How to Preserve Diversity
Set aside large areas of land to preserve the wilderness in the form of parks, monuments and wildlife refugesCollect, preserve and maintain a variety of seeds from different areasUse genetic engineering to change genetic information at the molecular level
![Page 12: Biodiversity Unit 3 Environmental Science 1. What is diversity? Diverse: differing from one another; composed of distinct or unlike elements or qualities](https://reader036.vdocument.in/reader036/viewer/2022062309/5697bf7c1a28abf838c83e00/html5/thumbnails/12.jpg)
Endangered Species
Extinct: the last remaining member of the species has died, or is presumed beyond reasonable doubt to have died
Examples: Thylacine, Dodo, Passenger Pigeon
Extinct in the wild: captive individuals survive, but there is no free-living, natural population
Examples: South China Tiger, Alagoas Curassow
![Page 13: Biodiversity Unit 3 Environmental Science 1. What is diversity? Diverse: differing from one another; composed of distinct or unlike elements or qualities](https://reader036.vdocument.in/reader036/viewer/2022062309/5697bf7c1a28abf838c83e00/html5/thumbnails/13.jpg)
Endangered Species
Critically endangered: faces an extremely high risk of extinction in the immediate future
Examples: Arakan Forest Turtle, Javan Rhino, Brazilian Merganser
Endangered: faces a very high risk of extinction in the near future
Examples: Blue Whale, Snow Leopard, African Wild Dog, Tiger, Albatross, Crowned Solitary Eagle
![Page 14: Biodiversity Unit 3 Environmental Science 1. What is diversity? Diverse: differing from one another; composed of distinct or unlike elements or qualities](https://reader036.vdocument.in/reader036/viewer/2022062309/5697bf7c1a28abf838c83e00/html5/thumbnails/14.jpg)
Endangered Species
Vulnerable: faces a high risk of extinction in the medium-term
Examples: Cheetah, Gaur, Lion, Wolverine
Conservation Dependent: The following animal is not severely threatened, but the animal must depend on
Examples: Spotted Hyena, Leopard Shark, Black Caiman
![Page 15: Biodiversity Unit 3 Environmental Science 1. What is diversity? Diverse: differing from one another; composed of distinct or unlike elements or qualities](https://reader036.vdocument.in/reader036/viewer/2022062309/5697bf7c1a28abf838c83e00/html5/thumbnails/15.jpg)
Endangered Species
Near Threatened: may be considered threatened in the near future
Examples: Blue-billed Duck, Solitary Eagle, Small-clawed Otter , Maned Wolf
Least Concern: no immediate threat to the survival of the species
Examples: Brown Rat, Nootka Cypress, Wood Pigeon
![Page 16: Biodiversity Unit 3 Environmental Science 1. What is diversity? Diverse: differing from one another; composed of distinct or unlike elements or qualities](https://reader036.vdocument.in/reader036/viewer/2022062309/5697bf7c1a28abf838c83e00/html5/thumbnails/16.jpg)