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What effect of environmental pressures have on species in an ecosystem? -…
What effect of environmental pressures have on species in an ecosystem?
CAT CHARACTERISTICS
behaviour
strong hunting instinct
#
active at night
arent codependant
coexist with humans
Behavioural reproduction and isolation
different environment lead to variations
Charles Darwn
sexual selection
oportunistic predator
apperance
feral cats are more muscular than house cat
types
domestic
relies on humans
no hunting
study showed
62% killed birds
59% killed mammals
31% killed reptiles
stray
partly on humans
feral
free-living
survives
self-perpetuating populations
Diet
#
birds
reptiles
amphibians
insects
fish
SELECTION PRESSURES
competition
#
predation
#
pollutants
climate change
parasitism
vegetation
rainfall
landform patterns
#
food availability
reproduction
#
exposure to disease
HISTORY
cat
in australia since european settlement
arrived as early as 17th centurary
feral casts established in 1850s
Fertile cresent
middle east
population
not accurate
nubers flucuate considerably
due to availability of prey
brought in for managment of species
mice
rabbits
kangaroo
greater bilby
thought to be extinct
100 years ago
found in temperate coastal areas
population in warmer temperate areas
domestication
#
10,000 years ago
BIOTIC FACTORS
#
predatory impacts
threaten survival of 100 native Australain species
Greater Bilby
species of wren
eastern barred bandicoot
superb lyrebird
threaten 81 vunerablge endangered animals
35 bird species
36 mammals
7 reptillian species
3 amphibian species
Food web
contributer to extinctions
desert bandicoot
pig footed bandicoot
rusty numbat
paradise parrot
competitve impacts
similar diet wiht quolls
eagles
hawk
reptiles
birds
cats kill over 1 million per day
extinction of 6 birds
99% are native
button quails
quail thrushes
major factor in extinction of island birds
contribution in ecosystems
pollinate plants
spread of seeds
instect control
protect environment from climate change
hold together the ecosystem
Biotic factors
living organisms
HABITAT & ENVIRONMENT
found all over australia
thrive in all climates
flourishes in vastly different types of terrain
habitat
forest
woodlands
grasslands
wetlands
arid areas
live and reproduce in the wild
survive by hunting and scavenging
Kakadu National Park
(forest)
abiotic
sunlight
soil
minerals
rocks
water
drought affects cats
population drops significantly
little food available
#
temperature
radiation
wind
biotic
flora
shrubs
flower
fern
mosses
lichens
fungi
fauna
mammals
birds
reptiles
insects
worms
microbes
ABIOTIC FACTORS
#
diseases
diseases and illnesses
#
feral cats carry infectious disease
transmitted to native animals
toxoplasmosis
harmful to marsupials
blindless
respiratory issues
paralysis
loss of offspring
rabies
Abiotic factors
non-living factors
water availability
PREVENTION
strategic culling
responsible pet owernership
diveristy in an ecosystem
COMPETITION
with introduced animals
demand for agricultural land
various animals
sheep
cattle
rabbits
quolls
similar predation / diet
quolls
eagles
hawks
reptiles