Biodiversity Flashcards
What are the four types of diversity in ecosystems
genetic diversity
ecosystem diversity
regional diversity
species diversity
Genetic diversity
variation of genes within a species
Ecosystem diversity
variety of ecological habitats in an ecosystem
Regional diversity
variety of landscapes within an ecosystem
Biodiversity
the diverse range of organisms, genes, and ecosystems found within the biosphere
What are the factors that affect biodiversity
evolution
migration
human impact
exotic invasive species
Macro-evolution
evolution of an entire family of organisms in relation to all other organisms
Micro-evolution
evolution that occurs within a single population of organisms
What does micro-evolution cause
increases or decreases survival rate of organisms
increases biodiversity
Migration
movement of organisms from one location to another
What factors affect migration
food supply
water supply
climate change
reproduction patterns
What does migration cause
temporary or permanent appearance of new organisms in an ecosystem
can lead to loss of native species
Africanized bees are also known as….
killer bees
Africanized bees are native to which continent
Africa
To where did the killer bees spread
south and central America, Mexico, and southwestern US
Are killer bees more likely to swarm than European honey bees
yes
Are killer bees dangerous to humans
yes
Food chains
single pathway from producer to consumer
Food web
integrated pathways of feeding in an ecosystem
What does a loss of an organism in a food web cause
can cause decrease or increase of other organisms
What does a reintroduction of a species in a food web cause
cause the organisms to re-establish the niche or cause competitive exclusion
What does the addition of a new species in a food web cause
can lead to competitive exclusion
An increase in biodiversity causes
an increase in ecosystem stability and increase in productivity
A decrease in biodiversity causes
a decrease in ecosystem stability and decrease in productivity
About how many species are lost everyday due to deforestation of rainforests
137
About how much of the world’s ten million species are located in the rainforest
1/2 of the ten million species
Species diversity
variety of organisms within an ecosystem
