:: Cocos
Island: A Unique and Exceptional Territory
Cocos
Island is a unique and exceptional insular
territory. These attributes are determined
by a series of conditions related to its
geological origin, geographical location
and its oceanic island character, which
provide a diversity of natural environments
with an exceptional flora and fauna of both
marine and land species.
Cocos
Island emerged as an oceanic island after
a volcanic event in the underwater mountains
that developed over the Cocos Tectonic Plate
in the eastern tropical Pacific ocean. It
is the only territory that emerged from
this undersea mountain range, and, as such,
is an important area for study and for monitoring
the geological phenomena and the tectonics
of its plates.
Oceanic
islands are unique and scarce. Upon emerging
in the middle of the ocean, there was no
life on Cocos Island. Because it was so
far from the mainland, the colonization
by continental organisms was slow and uneven.
It is possible to observe that some groups
of organisms that developed on the island
were well represented, others less so and
still others were totally absent, which
began a deficient and unharmonious biota,
although exceptional in relation to the
continental biota.
A special
characteristic of oceanic islands is the
presence of endemic plants and animals,
that is to say, of organisms that are found
only in that part of the world. These endemisms
are the product of evolution in isolated
areas due to an absence of external genetic
derivation, especially from the continent.
Another
distinctive characteristic of oceanic islands,
such as Cocos Island, is that the ecological
and evolutionary processes take place in
simple ecosystems (with few organisms),
which makes their study easier and more
accessible to researchers.
Cocos
Island offers two other outstanding characteristics
from a biological and ecological point of
view. The first refers to the existence
of a great diversity of insular environments,
marine and land, relative to its size, which
has developed a special and unique biota
despite the limited numerical diversity.
The second characteristic refers to the
geographic isolation of the island. As the
only emergent point of the undersea Cocos
mountain range in this sector of the eastern
Pacific Ocean, it is a point of convergence
for migratory marine species that arrive
from the open sea to the waters surrounding
the island to complete various stages of
their life cycles (particularly feeding
and reproduction). This converts the area
into a key location in the region for the
maintenance of reserves of marine resources,
and a very important area for the study
of the behavior, reproduction and population
dynamics of the marine species. The geographic
isolation also is a condition that permits
the processes of natural selection and evolution
on land.
The
second characteristic refers to the geographic
isolation of the island. As the only emergent
point of the undersea Cocos mountain range
in this sector of the eastern Pacific Ocean,
it is a point of convergence for migratory
marine species that arrive from the open
sea to the waters surrounding the island
to complete various stages of their life
cycles (particularly feeding and reproduction).
This converts the area into a key location
in the region for the maintenance of reserves
of marine resources, and a very important
area for the study of the behavior, reproduction
and population dynamics of the marine species.
The geographic isolation also is a condition
that permits the processes of natural selection
and evolution on land.
Cocos
Island is located in the eastern tropical
Pacific Ocean in a strategic geographical
position that is unique and exceptional
in relation to the climactic and oceanographic
phenomena that conditions the regional environment
and that of the island.
Climatically,
this island is located at a point that is
affecteded by the Intertropical Convergence
Zone (ZCIT) in its north-south-north migratory
oscillation. This fact converted it into
the only oceanic island in the eastern tropical
Pacific with a very high yearly rainfall.
This constitutes an exceptional characteristic
in the regional context.
Also,
because of its geographic location, the
island is influenced by a complex system
of marine currents that expose it to the
reception of an unusual number of organisms
from the American continent, as well as
to organisms of Indo-Pacific origin, that
is to say, from the central and western
Pacific and from the western Indian Ocean.
Because of this, its fauna and flora (biota)
are a very particular mix of biological
elements from diverse origins, with an endemic
component that developed on the island as
a consequence of its isolation.
Finally,
due to its geographic location, Cocos Island
is an ideal place to study and monitor the
climactic and oceanographic phenomena of
the eastern tropical Pacific Ocean, and
of global phenomena such as the southern
oscillation of El Niño (ENOS).
One can conclude that Cocos Island is a
veritable living laboratory, with a scientific
importance that surpasses the limits of
national and regional interest and which
enters into the sphere of international
interest for all humanity.
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