Biodiveristy Flashcards
Biodiversity
Variety of living organism in an area
Species
Group of similar organisms able to reproduce to give fertile offspring
Habitat
Area inhabited by a species
Factors affecting habitat
Abiotic- physical (soil, temp )
Biotic - living (food availability , predators prescence)
Biological diversity
Number of individual and in how many different places
Genetic diversity
Genetic differences within a species (variation of alleles )
Species richness
How many diff species are present
Count number of diff species present
Use random quadrant or transect
Species eveness
How evenly represented the species are
Use random quadrant and count number of each species
Calculate relative abundance
Simpsons index
D : diversity of habitat
n; Total number of organism of particular species
N- total number of organisms of all species
Higher = more diverse
Why we should conserve species
Economic :
•help us develop technology
•reduce soil depletion costs
•provide resources
Ecological: •prevent disruption of food chain •drugs •fuels •food
Ethical:
•all living organism have a right to live
Aesthetic:
•areas with more biodiversity provide attractive landscapes
• no human design can compete with natural variations
Human activities that affect nature/ bio diversity
- hunting
- killing threats to humans (Mosquitos)
- killing to remove competitions for our food (pests)
- pollution
- habitat destruction
Habitat diversity
Number of different habitats in an area
Species diversity abundance
Differences between species
Structural functional