Biodiverstiy Flashcards
define biodiversity
the variety of living organisms in an area
define species diversity
the number of species and the abundance of each species in an area
define genetic diversity
the variation of alleles within a species
define species evenness
a measure of the relative abundance of each species in an area
define species richness
number of different species in an area
habita diversity
number of different habitats in an area
name 3 types of non-random sampling
opportunistic, stratified, systematic
name 4 factors decreasing biodiversity due to growth of human population
1) habitat loss
2) over-exploitation
3) urbanisation
4) pollution
name 3 factors that decrease biodiversity due to monoculture
1) habitat loss
2) loss of local plants and animals
3) loss of heritage varieties
define climate change
a significant long term change in an area’s climate
name 2 factors that may affect biodiversity caused by climate change
- make areas uninhabitable/inhabitable
- change in environmental conditions force species to migrate.
state 4 reason for maintaining biodiversity
1) interdependence of organisms
2) genetic resource
3) economic reasons
4) aesthetic reasons
whats a keystone species
a species that many other species in an ecosystem depend on and without the ecosystem would change dramatically
what is CITES
(convention on international trade in endangered species)
regulate trade in wild animal and plant specimens e.g.ivory
what is CBD
(Rio convention on biological diversity)
an international agreement that aims to develop international strategies on the conservation of biodiversity and how to use animal and plant resources.
