Biodiversity loss and species extinction can occur through natural causes or human disruption of the environment. Natural causes include evolution, asteroid impacts, volcanic eruptions, and plate tectonics, which can destroy habitats. Human disruption involves activities like habitat destruction, climate change, overhunting, pollution, and warfare, which have accelerated species extinction, especially in the Pleistocene and Holocene epochs as human populations and impacts expanded. Conservation efforts aim to protect vulnerable and endangered species from extinction.

1. Don’t Expect Too Much Please…
I’m an Amateur.

2. Causes of Species
Extinction
(Science Report)

3. Biodiversity is diminished or destroyed in a
number of ways either by natural cause or
by human disruption. When the balance of
nature is disturbed, environment is
being devastated and species became EXTINCT.
Natural Cause : Human Disruption:
*Evolution
*Asteroid Impact
*Volcanic Eruption
*Plate Tectonics
*Others
*Holocene Extinction
*Pleistocene Extinction
*Others

4. Natural Cause
-Destructive change to environment or landscape such as
Natural phenomena that cause Extinction.
Extinction-
is the end of
a group of
organism,
normally a
species.
Species-
one of the
basic units of
biological
classification
and a
taxonomic
rank.
*Evolution
*Asteroid Impact
*Volcanic
Eruption
*Plate Tectonics
Habitat-
place where
species live
or grow.

5. Evolution
Evolution process became more faster and quick in birds and some marine mammals for which
Is they have their migrating seasons.
-Change in heritable traits of biological populations over successive generations.
Evolutionary processes give rise to diversity at every level of biological organization ,
including the levels of Species, individual organisms, and molecules.
Example: Snakes are believed
to have legs like lizards
millions of years ago and as
time goes by it disappear to
survive in it’s environment.
113-million-years-old-snake-Fossil

11. -This is named after what geologists call the period as humans have been in.
-It is thought to be started once the Homo-Sapiens started dispersing outward fr
on the land bridges, hunting and gathering was the start of the Extinction induc

12. Pleistocene Megafauna
Pleistocene Megafauna
is set of species of large animals
that lived on Earth during Pleistocene
epoch and became extinct in a
Quaternary extinction event. These
species appear to have died off as
Humans expanded out of Africa and
Southern Asia.

13. Other
Human Causes of Extinction
• Destruction/ Fragmentation of Habita
• Climate Change/ Global Warming
• Increased Human population
• Hunting and Poaching
• Pollution
• Warfare

14. Giant Panda (E)
Australian
Koala
(V)
Pocket Shark (R) African Baby Rhino (O)