Ernetta K. Smith
Dr. A. Welch
March 4, 2004
What is a Habitat?
A habitat is the physical and biological
environment used by an individual, a
population, a species, or a group of
What is Habitat Loss?
Habitat Loss has occurred when
quality of the environment is so low
that it is no longer usable by a given
What is Habitat
Habitat Degradation is the process by
which habitat quality for a given
species is diminished.
What is a Biota?
A biota is the combination of
animals, plants, and fungi within a
What are Causes of
Causes of Habitat Loss include man
made objects such as roads, dams,
and Utility Corridors.
Roads are structures used to facilitate
movement. However, they are
barriers for animals such as
amphibians, small reptiles, and
Although many animals are capable
of crossing roads, they may be run
down in the process.
Damming streams and rivers have
destroyed many aquatic ecosystems.
Many animals move up and down the
streams searching for places to forage
Moving downstream these animals
are likely to be churned to death in
turbines. Moving upstream, they
encounter an unmovable wall that
may or may not provide a food chain.
Utility Corridors are used apply
fences to large landscapes,
controlling the movement of livestock
and large wild animals.
Utility Corridors are also used to
dissect landscapes, potentially
isolating organisms from reaching
their comfort zone.
What are the
Consequences of Habitat
Consequences of Habitat Loss
include the endangerment and
extinction of species, as well as the
destruction of land and ecosystems.
Other structures that are considered to
be a cause of Habitat Loss are
parking lots, mines, buildings, and
What are Causes of
Causes of Habitat Degradation are
Air Pollution, Water Pollution, and
A combination of CFC’s and halons
reduce the concentration of the ozone,
allowing UV rays to reach the earth
surface, forming toxic clouds called
Although Air Pollution is not a
primary cause in the decline of
populations, it may still lead to
Water Pollution includes material
such as mud that smothers the bottom
of aquatic ecosystems at high
Water pollution affects marine
biodiversity via extirpation. Also,
stresses populations by reducing their
Pesticides, Insecticides, and
Rodenticides are used to kill animals
that would eat our crops.
Fragmentation and Barriers are
conservation problems because they
destroy the ecosystems of species.
Fragmentation is a process by which
ecosystem destruction can isolate the
biota of ecosystems that remain
Barriers are structures that are built to
eliminate passage, which in this case the
causes of habitat loss and degradation help
to inhibit animal movement.