Endangered and Threatened
Many species of animals are disappearing from our planet.
Extinct means that the entire species has died out and can never return.
Endangered animals are those in immediate danger of becoming extinct.
Plant Adaptations to Salty Environments Halophytes
Plants that live on the coast are living in areas of
high salt content so they need mechanisms to deal
with the large amounts of salt in the environment.
They have to either try to dilute the salt enterin
World Land Ecosystems
Rainforests are one of the most
bio-diverse ecosystems, particularly tropical
Desert = An area that receives less than 25 cm
of rain per year.
Some deserts receive NO precipitation at all
during one year.
The grains wheat (female parent) and rye (male
parent) were bred to produce a new grain called
Triticale is sterile however. It cannot reproduce
A habitat is the place that a species of organism
What is Ecology
Ecology is the study of the lives of organisms and how
organisms interact with their environment.
An Ecologist is a scientist who studies the lives of organisms
and how organisms interact with their environment.
An organism is a living
Desert Plant Adaptations
Plants are Adapted to the Desert in Many
The major plant adaptations are to shortage of water.
Some adaptations are due to shortage of energy.
However energy shortages are really related to water shortages because you need
Why are they important?
Biodiversityone of the most biodiverseand valuableecosystems on
earth, eg>4000 fish species, maybe >1 million undiscovered organisms
Possible source of new drugs and medicines
Home for many commercial fish species
photo = light
synthesize = to make
Photosynthesis is the process of making food
with the use of light energy.
Photosynthesis happens mostly in the leaves of
a plant but can also happen in the stem.
Photosynthesis in Plants
Plants make their
The mangrove ecosystem is based around the mangrove tree.
In the mangrove communities, the major producer is the
mangrove tree although other salt tolerant plants can live in
Most of the mangrove communities in t
Evolution and Natural Selection
We have talked about adaptations of plants and animals to the desert
environment and adaptations to a salty environment.
Evolution is the changes (or adaptations) that happen over time in
Energy Flow through Ecosystems
step in the flow of energy through
an ecosystem is known as a trophic
As energy moves from one trophic
level to the next, most of the useful
energy (90%) is lost as heat (second law
Desert Ecosystems in the UAE include the:
Sand dune ecosystem
Alluvial plains ecosystem
All of these ecosystems in the UAE have one
thing in common.
A desert can be defined as a region that:
- receives less than 2