Transcript Prezentace aplikace PowerPoint

CAUSES OF ENDANGERED
ANIMALS ON EARTH
Výukový materiál EK 01 - 18
Tvůrce: Ing. Marie Jiráková
Tvůrce anglické verze: Mgr. Milan Smejkal
Projekt: S anglickým jazykem do dalších předmětů
Registrační číslo: CZ.1.07/1.1.36/03.0005
Tento projekt je spolufinancován ESF a SR ČR
THE CAUSES OF THE DETERIORATION OF
THE EARTH'S ENVIRONMENT


natural disasters - floods, earthquakes, volcanic
eruptions etc. - ecosystem must cope with them
over time
human activity - logging in tropical areas,
industrial accidents etc. - difficult to mitigate
their consequences
GLOBAL CHARACTER
CHANGES
they affect vast areas
 the most significant threat to whole organisms
and habitats

FOREIGN SUBSTANCES
pesticides and other chemicals
 heavy metals



found in Antarctica
can get into the food web and can also damage
our human health
THE GREENHOUSE EFFECT
it is probably the cause of warming the Earth's
surface
 during the last 150 years, Earth's average
temperature has increased by 0.2 - 0.3 ° C


increasing amounts of solid industrial waste
products and oxides (mainly nitrogen and carbon)
in air
SOIL AND WATER ACIDIFICATION

products of combustion processes (especially
sulfur dioxide and nitrogen oxides) are oxidized
in the atmosphere to form acids, which fall to
earth as acid rain - rain, snow, dew and frost
desulphurisation
 transition to alternative sources of energy
 new technology more environmentally friendly

EUTROPHICATION OF WATER


water pollution by substances that are nutrients
for photosynthetic organisms
there is an excessive amount of nitrates and
phosphates in water - fertilizer run-off from
fields
THE OZONE HOLE


The impairment of the ozone layer of our planet
by some substances (eg. CFC)
thin ozone layer leads to increased UV radiation
- carcinogenic effects, mutagenic effects
OTHER CAUSES

pollution, hunting or game trapping are not the
only causes of disappearance of species
for example. in the Czech Republic: the
construction of water power stations - salmon,
 planting of coniferous forests - Stag Beetle

BIOINDICATORS


species that are sensitive to changes in the
environment are suitable for the so-called
bioindication of the pollution
the frequency of populations expresses the degree
of biotope threat – for example pearl oyster
indicates the pollution of water
WORKSHEET - REVISION
How the foreign substances can get into the food
webs?
 Explain the greenhouse effect.
 Why is ozone important for the protection of life
on Earth?
 What is necessary for acid rain?
 What is eutrophication of water what is it caused
by?
 Why kestrels are not suitable as bioindicators of
the environment?

SOURCES
BRANIŠ, Martin. Základy ekologie a ochrany
životního prostředí. 2. vyd. Praha:
Informatorium, 1999. ISBN 80-86073-52-1.
 PAPÁČEK, Miroslav a kol. Zoologie. Praha:
pedagogické nakladatelství, 2000, ISBN 80-7183203-0.
 KVASNIČKOVÁ, Danuše. Základy ekologie.
Praha: Scientia,spol.s r.o., 1994, ISBN 80-8582784-0
