Studied by 34 Peoplebiodiversity
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biodiversity
variety of all living things
three levels of biodiversity
genetic species ecosystems
genetic diversity
variety of genes within a species
in breading side effects
decrease genetic diversity
more infertile males
species diversity
variety of species within a habitat
endemic species
only occur in one area ie chinchillas in australia
ecosystem diversity
variety of ecosystems in a given place
organisms and physical environments interacting together
estimating species
fossils, although not all species are traceable by species because records are imperfect
biodiversity hotspot
area rich in biodiversity
molecular phylogeny
measure similarities of cells through DNA RNA etc
locations of biodiversity hotspots
costal and tropical regions
challenges to identify a new species
looks like another
small population
isolated areas without humans
live in small locations
core values of biodiversity
economic
ecological
recreational
cultural
scientific
economic
materials for consumption/production, many livelihoods depend on it
ecological
clean air, water, plants, pest control etc
recreational
tourism, hiking
cultural
connected spiritually to natural things
scientific
ecological data to understand natural world
threats to biodiversity
overhunting, habitat loss, invasive species, climate change
over hunting
whales, large mammals bc they have lots of usable materials
habitat loss
cutting down forests
more specific food needs are of organisms, the more likely they are to run low or have little food
ie. pandas only eat bamboo
invasive species
they eat everything ie. the zebra muscle
climate change
quickly changing ecosystems threatens species adaptation
mass extinction
extinction very quickly (1000 years)
probable causes of mass extinction
climate change, volcanic eruption, over consumption
extinction rate
0.1-1 species per year
percentage of earth history that has gone extinct
99%
taxonomy
classifying and identifying organisms
morphological
physical form
the Linnaean system
give everything 2 names binomial nomenclature
larger group
specific group
ie. castor canadensis = beaver
species
group of organisms that can reproduce and produce viable offsprings
similar genera get grouped into a
family
largest category of classification
kingdom
eukaryotic
linear chromosome mitosis, meiosis sexual tissue development aerobic (breathing) complex flagella
prokaryotic
circular chromosome diary fission asexual no tissue development anaerobic (non breathing) simple flagella
heterotrophic
eat living or dead things
autotrophic
produce their own food
sexual
specialized sperm and egg cells reproduction - one male one female genetically different offspring
asexual
no specialized cells does not require another mate for reproduction genetically identical (half a worm)
habitat
where you live land, water or arboreal (trees)
unicellular
one cell makeup - bacteria
multicellular
made up of many specialized cells
6 major kingdoms
animals, plants, fungi, Protista --> eukaryotic bacteria, archaea --> prokaryotic
bacteria kingdom
cell wall made of PDG
fungi kingdom
cell wall made of chitin
plant kingdom
cell wall made of cellulose
eubacteria
prokaryotic, asexual habitat: hot springs, dry deserts
archaebacteria
prokaryotic, asexual habitat: digestive tracts of large mammals, aquatic environments
protista
eukaryotic, sexual and asexual habitat: aquatic and moist