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Transcript of Biodiversity
is the variety of life across all levels of ecological organization
The differences in DNA among individuals within species and populations
: the number or variety of species in a given area
Members of a species share certain characteristics:
can breed with each other to produce fertile offspring
If a population does not have genetic diversity:
reduced ability to withstand environmental change
more vulnerable to diseases
more vulnerable to produce weak and defective offspring
may become extinct
Write a 3 sentence summary answering the essential question.
What is biodiversity?
By the end of this lesson you should be able to:
Differentiate the components of biodiversity.
Explain two ways in which biodiversity varies across groups and geography.
Describe the economic benefit of biodiversity.
number and variety of ecosystems within a given area.
Chapter 7 Lesson 1 pages 200-206
Levels of classification:
There are three types of Biodiversity:
makes it easier for organisms to adapt to a changing environment
have a better chance of survival
- generates new species and increases genetic diversity
- decreases species diversity
All of these dogs could breed and produce fertile offspring because they are members of the same species
Scientists who classify species using an organism's physical appearance and genetic makeup
How can I remember that?
All organisms have a 2 name naming system (binomial nomenclature)
Canis lupus - dog
felis catus- cat
Homo sapians- humans
a population of organisms that has genetically based characteristics such as size and color, that differ from members of the same species in a different area
can all mate and produce fertile offspring
there are between 5 and 30 million species on Earth
Species can be difficult to find and identify
Species are not evenly distributed:
among taxonomic groups
within a given geographic area
biodiversity increases toward the equator
Benefits of Biodiversity
Biodiversity and ecosystem function
intact environments provide ecosystem services:
High biodiversity increases stability of communities and ecosystems
Stable ecosystems are:
: resist environmental change without losing function
:affected by change, but bounce back and regain function
Biodiversity and Agriculture
wild strains of plants are cross-bred (artificial selection) with related crops to transfer beneficial traits such as:
grow back year after year
Biodiversity in Medicine
Organisms contain compounds that are useful for treating diseases.
Every species that goes extinct represents a lost opportunity to find a cure for a disease.
Out of the 150 most prescribed drugs in the United States, 118 of them originate from nature not from labs.
Biodiversity, Tourism, and Recreation
Environmentally responsible tourism is a source of income for many nations
bird watching and fishing are a few recreational activities that people enjoy.