Activity
56
II
Block
For many years, climate change,
decreases in sea level, intense activity
volcanic dad, destruction of ecosystems
and overexploitation of stocks for
consumption and trade have been the leading causes
cipal loss of biodiversity.
Biodiversity is the result of a process
natural that it has been shaped in mil-
tions of years, so it must be protected, respected
Tada and preserved. Humans form
part of this biodiversity in ecosystems.
With the information in the following table draws
in your notebook two bar graphs: one
show the five countries which offer the greatest
number of mammal species and one for
the reptiles.
Country
Number of species
mammals
Reptiles
Brazil
578
630
Colombia
456
520
China
502
387
Indonesia
667
511
Mexico
535
804
Venezuela
353
293
Ecuador
271
374
Peru
441
289
Australia
376
880
Madagascar
165
300
Congo
166
268
Analyzes graphs and group elaboraste
He mentions the country ranks first in:
Reptiles:
mammals:
What role does the variety of Mexico
species of reptiles and mammals?
Organize yourselves into teams and tell your
classmates and his teacher: what importance
of biodiversity for humans ?,
How can we help preserve it? write
the conclusions in your notebook and share them
with the other teams.
Mexico megadiverso
Mexico has one of the top three places
global biodiversity of reptiles and ma-
mammals, although only 1.3% of occupying the
planet's surface.
E
Source:
SEMARNAT
,
And the environment?
Problems in Mexico and the world
,
SEMARNAT
,
2007.
E
Heloderma suspectum
(Gila monster, Mexico).
ir al Examen
