Perilous Times
Gorillas head race to extinction
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By Richard Black
Environment correspondent, BBC News website
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The orangutan - an icon in peril... like so
many other species
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Gorillas, orangutans, and corals are among the plants and animals
which are sliding closer to extinction.
The Red List of Threatened Species for 2007
names habitat loss, hunting and climate change among the causes.
The World Conservation Union (IUCN) has
identified more
than 16,000 species threatened with extinction, while prospects have
brightened for only one.
The IUCN says there is a lack
of political will to tackle the global erosion of nature.
Governments have pledged to stem the loss
of species by 2010; but it does not appear to be happening.
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The rate of biodiversity loss is increasing
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"This year's Red List shows that the invaluable
efforts made so far to
protect species are not enough," said the organisation's
director-general, Julia Marton-Lefevre.
"The rate of biodiversity loss is
increasing, and we
need to act now to significantly reduce it and stave off this global
extinction crisis."
One in three amphibians, one in four
mammals, one in
eight birds and 70% of plants so far assessed are believed to be at
risk of extinction, with human alteration of their habitat the single
biggest cause.
Critical list
The tone of this year's Red List is
depressingly
familiar. Of 41,415 species assessed, 16,306 are threatened with
extinction to a greater or lesser degree.
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RED LIST DEFINITIONS
Extinct - Surveys suggest last
known individual has died
Critically Endangered - Extreme
high risk of extinction - this some Critically Endangered species are
also tagged Possibly Extinct
Endangered - Species at very high
risk of extinction
Vulnerable - Species at high risk
of extinction
Near Threatened - May soon move
into above categories
Least Concern - Species is
widespread and abundant
Data Deficient - not enough data to
assess
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The main changes from previous assessments include
some of the natural
world's iconic animals, such as the western lowland gorilla, which
moves from the Endangered to the Critically Endangered category.
Numbers have declined by more than 60% over
the last 20-25 years.
Forest clearance has allowed hunters access
to
previously inaccessible areas; and the Ebola virus has followed, wiping
out one-third of the total gorilla population in protected areas, and
up to 95% in some regions.
Ebola has moved through the western lowland
gorilla's
rangelands in western central Africa from the southwest to the
northeast. If it continues its march, it will reach all the remaining
populations within a decade.
The Sumatran orangutan was already
Critically Endangered
before this assessment, with numbers having fallen by 80% in the last
75 years.
But IUCN has identified new threats to the
7,300
individuals that remain. Forests are being cleared for palm oil
plantations, and habitat is being split up by the building of new
roads.
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Governments know they are going to fail to
reach that target ![]()
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In Borneo, home to the second orangutan species,
palm oil plantations
have expanded 10-fold in a decade, and now take up 27,000 sq km of the
island. Illegal logging reduces habitat still further, while another
threat comes from hunting for food and the illegal international pet
trade.
So fragmented have some parts of the
Bornean forest
become that some isolated orangutan populations now number less than 50
individuals, which IUCN notes are "apparently not viable in the long
term".
Straight to zero
The great apes are perhaps the most
charismatic
creatures on this year's Red List, but the fact they are in trouble has
been known for some years. Perhaps more surprising are some of the new
additions.
"This is the first time we've assessed
corals, and it's
a bit worrying because some of them moved straight from being not
assessed to being possibly extinct," said Jean-Christophe Vie, deputy
head of IUCN's species programme.
The first formal assessment of corals shows
many are at risk
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"We know that some species were there in years
gone by,
but now when we do the assessment they are not there. And corals are
like the trees in the forest; they build the ecosystem for fish and
other animals."
IUCN is now embarking on a complete
assessment of coral species, and expects to find that about 30% to 40%
are threatened.
The most glaring example of a waterborne
creature failed
by conservation efforts is probably the baiji, the Yangtze river
dolphin, which is categorised as Critically Endangered, Possibly
Extinct.
This freshwater species appears to have
failed in its
bid for survival against the destructive tides of fishing, shipping,
pollution, and habitat change in its one native river. Chinese media
reported a possible sighting earlier this year, but the IUCN is not
convinced; with no confirmed evidence of a living baiji since 2002,
they believe its time on Earth may well be over.
If so, it will have become a largely
accidental victim
of the various forces of human development. Not so the spectacular
Banggai cardinalfish; a single decade of hunting for the aquarium trade
has brought numbers down by an astonishing 90%.
Many African vultures are new entrants on this
year's list. But birds
provide the only notable success, with the colourful Mauritius echo
parakeet making it back from Critically Endangered to Endangered.
Intensive conservation work has brought
numbers up from about 50 to above 300.
But the gharial, a crocodilian found in the
major rivers
of India and Nepal, provides a cautionary tale of what can happen when
conservation money and effort dry up.
A decade ago, a programme of
re-introduction to the wild
brought the adult population up from about 180 to nearer 430. Deemed a
success, the programme was stopped; numbers are again hovering around
180, and the gharial finds itself once more on the Critically
Endangered list.
Climate of distraction
IUCN says that it is not too late for many
of these species; that they can be brought back from the brink.
It is something that the world's
governments have
committed to, vowing in the 1992 Convention on Biological Diversity "to
achieve by 2010 a significant reduction of the current rate of
biodiversity loss at the global, regional and national level".
"Governments know they are going to fail to reach
that target," said
Jean-Christophe Vie, "and not just in terms of a few species - the
failure is really massive.
"We know that it is possible to reverse the
trend, but
the causes are so huge and massive and global, and there is still a
lack of attention to the crisis that biodiversity faces."
Many in the environmental movement argue
that too much
money and attention has gone on climate change, with other issues such
as biodiversity, clean water and desertification ignored at the
political level.
IUCN's assessment is that climate change is
important
for many Red List species; but it is not the only threat, and not the
most important threat.
There are conflicts between addressing the
various
issues, with biofuels perhaps being the obvious example. Useful they
may turn out to be in reducing greenhouse gas emissions; but many
conservationists are seriously concerned that the vast swathes of
monoculture they will bring spell dire consequences for creatures such
as the orangutan.
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