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5.3 Main Threats to Terrestial Ecosystems and Species (climate change…
5.3 Main Threats to Terrestial Ecosystems and Species
H: Habitat destruction
destroy forest and grasslands for agriculture and cattle grazing
residential development
Habitat degradation
cliamte change affecting corals and polar
pollution of water sources and air sources
soil degration
climate change
rising sea levels
acidification of oceans
complete destruction of polar habitats
temperatures changing to fast for species to adapt
droughts and servere storms
all cuase habitat destruction
P:Population Growth
most of our resources are exhaustible or renewable
increase population= increase resource use
Pollution
chemicals from factories and burning of fossil fuels
chemicals from heavy metals and mines
livestock feces.
fertilizers
bioaccumulation: most toxins are not completely broken down (passed on through food chain)
pesticies
contaminate soil, streams and lakes
I:Invasive Species
non native species introduced for our benefit
crops and live stock
decorative plants
introduced by accident
escaped pets
species including seeds
do not face natural predators,competitors, parasites etc
ways to control them
mechanical control
chemical control
biological control
Overexplotation
legal but unsustainable
unsustainable forestry
unsustainable fishing
Biodiversity: is important to conserve biodiversity because of ecosystems services and e
support our economy
oxygen production
ecotourism
pollination