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January 2012 |
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WFO |
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Environmental issues are deeply connected to the well-being of Families worldwide.
WFO Environment is a new section of our website where we select a series of news and important information regarding the sustainability of our planet.
Updated monthly, this is another way for WFO to promote important information for its members and most important for Families all over the world and we do hope you enjoy it. |
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The United Nations Conference on Sustainable Development
2012 is the year of the The United Nations Conference on Sustainable Development, that will take place in Rio de Janeiro, Brazil on June 20-22.
The World Family Organization will have an important participation during the Rio +20 Conference, working alongside Office for ECOSOC Support and Coordination UN NGO Branch, and UN NGO Inter-Regional Network.
Click here to keep informed on the news and activities involving WFO and the Rio +20. |
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50 years of ocean studies |
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The Intergovernmental Oceanographic Commission
of UNESCO (IOC) inaugurated its 50th anniversary
celebrations on 8 June, World Ocean Day, at a ceremony
and exhibition held at UNESCO in Paris.
The celebrations offered a chance to showcase the IOC’s
achievements over the past 50 years and consider its future
role. |
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‘The IOC is a standard-bearer for UNESCO’, said
Irina Bokova, Director-General of UNESCO. ‘Indeed, it is
integral to my vision of our Organization’s role in the 21st
century: providing essential continuity while responding
to the changing needs of today’s and tomorrow’s world.
[The IOC’s] contribution to climate science is a good example,’
she observed in the company of Assistant Director-
General and Executive Secretary of the IOC Wendy
Watson-Wright, French Secretary of State for Sustainable
Development Valérie Létard and French navigator and
IOC spokeswoman Maud Fontenoy. ‘The challenge posed
by climate change is a main focus of my mandate and I
recognize the vital role the IOC must and will play in that
regard,’ Bokova said. She highlighted the role of the Global
Ocean Observing System (GOOS), the ocean component of
the Global Climate Observing System which supports the
UN Framework Convention on Climate Change.
The role of GOOS is continually evolving but keeping
the system mantained is critical to ensuring that data
are available on demand, such as when a disaster strikes.
Since the explosion and sinking of an offshore drilling
rig in the Gulf of Mexico on 20 April, flow-rate modellers
from the Woods Hole Oceanographic Institution have
estimated that 20 000–40 000 barrels of oil – and possibly
50 000 barrels – have been leaking into the Gulf every
day. US scientists used models developed with GOOS data to produce a study released on 3 June which indicates
that, within weeks, oil from the massive spill might extend
thousands of kilometres along the Atlantic coast and into
the open ocean. The spill has demonstrated how useful
regular ocean observations are to disaster response – and
how inadequate ocean observing systems are, even in a
rich country like the USA. Vital equipment for oil spill
response, such as coastal radar which could provide realtime
data on surface currents and thus the oil spill movements,
has either not been deployed or been inadequately
maintained in the Gulf of Mexico.
During the anniversary ceremony, Geoff Holland, former
chair and architect of the IOC’s Ocean Charter in 1998,
presented an Ocean Call appealing for greater priority to
be given to programmes in coastal and ocean management,
ocean sciences and ocean technologies.
Representatives of a youth delegation also presented a
call for action from policy-makers and a list of their own
commitments. ‘Deeply troubled by the rapid degradation
of the oceans and seas, and in support of the recognition of
the ocean as a public good for all humanity, we ask for the
establishment of a global ethics board, which we propose
to name the United Oceans,’ they said. Since 1998, close
to 800 young people have taken part in national, regional
and international youth delegations and parliaments organized
with the help of the World Ocean Network. The next
youth delegations in 2011 and 2012 will take place in the
Caribbean and South Africa.
From 40 nations when it first came into being into 1960,
the UNESCO-IOC has grown to 138 Member States today,
including a number of landlocked countries.
For details: www.unesco.org/en/ioc-50anniversary
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Vineet Soni - Saving the guggul |
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The resurgence of public interest in plant-based medicine, coupled with the rapid expansion
of pharmaceutical industries, has fuelled demand for medicinal plants, causing
many of them to be overexploited.
Such has been the fate of the guggul plant Commiphora
wightii), a thorny bush found in the States of Rajasthan and Gujarat in India but also in arid
and semi-arid zones of Pakistan.
The guggul plant produces a sap, or resin, that has been
central to Ayurvedic medicine in India for nearly 3000 years. It is mentioned in classic Ayurvedic literature
as being an efficacious treatment for bone fractures, arthritis, inflammation, obesity, cardiovascular disease
and lipid disorders like high cholesterol levels. It is still widely used today to treat these ailments. |
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Thirty-one year old Vineet Soni is Associate Professor within the School of Life Sciences at Jaipur National
University. Dismayed to see the guggul plant slipping towards extinction in an apparent climate of indifference,
he founded the Save Guggul Movement in November 2007. Less than three years later, the fortunes of the
guggul plant are looking up. Vineet Soni is living proof that, with a little determination and some help from
your friends, one person can make a difference. |
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Why is the guggul plant so vulnerable?
The biggest threat comes from overexploitation by pharmaceutical
companies but its habitat is also being converted
for agriculture and engulfed by urbanization. Adding to
its vulnerability is the fact that it is found only in the wild,
grows slowly and has a poor seed germination rate. A guggul
plant generally takes about 10 years to reach tapping
maturity in an arid or semi-arid climate.
The guggul plant features on the IUCN’s Red List. It is
calalogued there as data-deficient because we know numbers
are declining but not to what extent. However, as early
as March 1994, the Government of India banned the export
of guggul plants as a result of increasing exploitation.
In 2008, The Red List catalogued 45 tree species from
India as being critically endangered and 246 plant species
as being threatened but this went largely unnoticed in India.
Unfortunately, more then 90% of the raw plant material used
in herbal industries in India is drawn from natural habitats.
What motivated you to found the Save Guggul
Movement and how did your project get off
the ground?
I had studied various biochemical and phytochemical aspects
of the guggul plant towards my PhD in botany, so was familiar
with the plant’s remarkable qualities. Upon returning home in
November 2007 after completing postdoctoral research at
the University of Geneva in Switzerland, I was struck by the
fact that the plant was becoming scarce, yet nobody seemed
to care. That is when I decided to found the Save Guggul
Movement, or Guggal Bachao Abhiyan in Hindi.
Conservation cannot work without the involvement of the
people who depend on biodiversity. That is why the first thing I did was to organize a series of awareness-building programmes
in 23 villages in Rajasthan in 2008, with the help of
friends. Local villagers and tribes responded enthu-siastically.
After participating in a series of meetings, talks and discussions,
these communities are now more aware of what they
stand to lose if the guggul plant disappears from the landscape.
They now also know how to protect the plant.
What do they use the plant for?
In addition to herbal remedies, the guggul plant is used
for fuel by some rural communities. Women and children
especially go into the forest daily to collect guggul wood
for cooking purposes. There is an abundance of alternative
plants they could use, so I advise people to collect these
instead.
Guggul-gum can also be purchased in a loosely packaged
form under the trademark of Dhoop, an incense which is
burned over hot coals. The burning coals produce a fragrant
dense smoke. People then carry the burning coals through
the home, lingering in every corner for a few seconds, as
this is said to drive away mosquitoes. Some believe it also
drives away evil spirits. I advise people to replace Dhoop
with electronic mosquito repellents, which are sold locally
at a low price.
Who collects the guggul-gum?
The oleogum resin is mainly collected by local unskilled tribal
and rural people who make several deep incisions on the
stem to extract a maximum amount of guggul-gum. The thick
branches are incised during the winter to extract the oleogum
resin. Collected crude oleogum resin is then sold at market or
directly to pharmaceutical companies.
I explain to people that these crude tapping
methods are now thought to kill the plant. After
making an incision, the ‘tappers’ apply a paste
around it consisting of a mixture of horse or wild
ass urine, oleogum resin and copper sulphate.
This method increases the amount of guggulgum
yielded by the plant to three to four times
that obtained using normal tapping procedures.
However, after a couple of years, the shrub
becomes unfit for tapping and ultimately dies of
copper sulphate poisoning.
Elders told us that, during the 1960s and
1970s, pharmaceutical company representatives
had come to see them and employed villagers to
collect oleogum resin from the guggul plant. The
companies provided them with a special knife
known as a mitchie golledge and with ethephon,
an ethylene-releasing synthetic chemical known
as 2-chloroethyl phosphoric acid. It has now been
proven that the application of ethephon on the cuts enhances
guggul-gum production several times over but that, in the
long run, this technique exhausts and kills the plant.
I advise villagers not to collect oleogum from natural
habitats, as access is restricted by the government, which has
passed various acts to save the plant from extinction. To ease
the pressure on wild populations, I myself am working on the
creation of a network of protected areas.
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Vineet with villagers participating in the guggul awareness-raising programme.
Vineet is holding a guggul plant propagated from stem cuttings. |
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How else can rural populations help to save the plant?
With the help of villagers and rural tribes, we have embarked
on large-scale cultivation of seedlings from stem-cuttings.
We then plant these seedlings in the guggul’s natural habitat
in different parts of Rajasthan. The sites have not been
chosen at random. Rather, we have selected those locations
which are the most suitable for producing guggulsterone,
the medicinal agent found in the plant’s resin. Recent
research has shown that it is the E-guggulsterones and
Z-guggulsterones in the guggul resin that are responsible for
reducing cholesterol levels.
Over the past couple of years, I have collected
resin from different locations in Rajasthan to
identify genetic types of guggul plant which
yield high levels of guggulsterone and thus
those habitats where the guggul plant ought to
be conserved in the wild.
Why use stem-cuttings rather than
seeds to cultivate guggul plants?
We use stem-cuttings because this is the best
method for propagating guggul on a large
scale. Stem-cutting offers several advantages
over seeds; it saves time and labour, and
produces plants from superior parent stocks
which are both genetically superior and uniform.
Stem-cuttings are also inexpensive and easier to perform than other propagation methods which
clone cells like tissue culture. Stem-cuttings offer another
advantage; they can continuously supply stocks throughout
the year for the purposes of reforestation.
Has there been a noticeable increase yet in the
numbers of guggul plants growing in the wild?
Yes, definitely. We have observed a distinct increase in some
regions thanks to the involvement of local rural populations.
Villagers take care of the seedlings until they are ready to be
planted in their natural habitat. But there is still a lot of work
to be done, owing to the vast geographical area covered by
Rajasthan. |
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What can developing countries do to conserve
medicinal plant species better?
In my opinion, poverty is the root cause of biodiversity loss in
developing countries. The overexploitation of wild medicinal
plants can only be reversed if conservation programmes are
combined with greater food and energy
security for the world’s large and growing
low-income populations.
Rural populations should be mobilized to
contribute to any effort to conserve areas of
high biodiversity. In order for local people
to adhere to any long-term conservation
strategy, they need to understand how to
protect their natural environment, so that
it can continue to provide them with food,
shelter, medicines, household implements
and other services. To maintain their support,
you then need to make sure that their
access to these benefits is respected. |
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Interview by Susan Schneegans
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A World of SCIENCE, Vol. 8, No. 3, July–September 2010
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Tracking plant diversity
in a changing world |
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If ambitious programmes have been launched in recent years to monitor the
environment in general and climate in particular, biodiversity monitoring has
been relegated to the back seat. As a result, we are still far from having a
complete inventory of the species on Earth, despite the importance of this
baseline information for monitoring progress towards the 2010 Biodiversity
Target and future targets. |
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The BIOTA Africa Network of biodiversity observatories is one of only a
handful of monitoring schemes operating on regional, continental and global
scales. Launched a decade ago by the German Federal Ministry for Education
and Research, which funds and operates the network together with African
partners, BIOTA Africa has brought together several hundred African and
central European researchers to document and analyse the state of African
biodiversity and its importance for local communities. These studies are part
of a broader effort to monitor diversity on Earth. An overview of this global
inventory as concerns plant diversity was presented in January to a UNESCO
conference on the interface between biodiversity science and policy. |
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Many of the well-documented species groups, such as
higher plants or terrestrial vertebrates, tend to be located
in the humid tropics and sub-tropics, especially in mountain
areas with high geodiversity. Generally speaking,
biodiversity decreases as you move from the equator
towards the poles. An area the size of a football stadium
in the lowland rainforest of equatorial Ecuador harbours
1000 different species of trees, shrubs, herbs, lianas and
epiphytes – as many plant species as you would find in
all of Ireland or in the Yukon Territory in Canada! It is no
coincidence that the United Nations Convention on Biological
Diversity was adopted in Rio de Janeiro in 1992, in one of the
top five global centres of plant diversity,2 Atlantic Brazil.
This said, there are also extra-tropical centres of diversity.
The European Alps sport floral diversity comparable to
that of the central Congo Basin. In temperate South Africa,
the Cape Floral Region is one of only six floral kingdoms
in the world.
Even areas with comparable environmental conditions
may show great disparities in the number of plant species.
Namaqualand in west South Africa is hot and arid
yet harbours an estimated 3500 plant species. The central
Sahara is almost 100 times larger but hosts far fewer than
1000 native plant species.
Quantity versus quality
Biodiversity is more than simply a matter of the sheer
number of species. One key qualitative aspect considered
in biogeography is the size of the species’ range.
Rare species or species that can only thrive in certain
conditions are considered of greater concern for
conservation than other species. The floras3 of many
islands in particular have high proportions of species
with a restricted range. More than 85% of Hawaii’s
1140 native plant species are endemic and thus occur
nowhere else. The German federal state of Thuringia is
a similar size to Hawaii with a comparable overall species
richness but does not have a single endemic species!
Around 70 000 plant species, or one-fifth of global flora,
are endemic to oceanic islands, which account for just 3.6%
of land on Earth. Due to their restricted distribution area,
many of these endemic species are highly threatened. If
their habitats are destroyed or replaced by the introduction of non-native invasive species, the endemic species are
irreversibly lost. Islands may thus warrant a high priority
in global biodiversity conservation this century.
Consulting the archives of biodiversity
When we began mapping plant biodiversity worldwide in
the 1990s, we were able to consult a variety of sources
of information and data, such as flora treatments, species
checklists or ecological studies. There are still large gaps in
places like the Amazon Basin, parts of the Congo Basin or
New Guinea where we know very little about the flora and
fauna. However, the scientific collections assembled over
the past 250 years in our natural history museums, herbaria,
seed banks and botanical gardens can still provide us with a
good overall picture of global plant diversity. |
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Tillandsia multicaulis
growing on a tree in
Costa Rica. Tillandsia
is an epiphyte, or ‘air
plant’, so-named because
it does not grow in soil.
Epiphytes cling to other
plants for support but
are not parasitic. In the
tropics, epiphytes include
ferns, cacti and orchids.
In temperate zones, some
algae, lichens and mosses
are epiphytes but no
higher plants. |
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Add to this the recent advances in information technology,
geographical information systems (GIS) and digitally available
natural history data and our team of biogeographers
had all the tools it needed to study the causes and consequences
of shifting biodiversity patterns around the world.
We also interacted with the major environmental NGOs, all
of which have their own science programmes for mapping
biodiversity and identifying priority areas for conservation,
such as Conservation International or the World Wildlife
Fund (WWF). For sub-Saharan Africa, we were particularly
reliant on the collections in natural history museums. These
‘archives of biodiversity’ are all the more precious in that
they contain information on where and when each sample
was collected.
Mapping plant diversity in Africa
The research institutions participating in the BIOTA network
are sub-divided into four regional research networks:
BIOTA West Africa, BIOTA East Africa, BIOTA Southern
Africa and BIOTA Morocco. Over the past decade, the
results of monitoring projects at each of the biodiversity
observatories in Africa have not only been published in
scientific journals but also shared with stakeholders to support
decision-making related to conservation and sustainable
development. Relevant information is accessible to all
partners in the form of data nodes, Internet databases and
checklists of flora and fauna. Field work in the context of
BIOTA West Africa, for example, has helped to increase the
number of known plant species in Burkina Faso by 30% in
the past 15 years. Scientists and decision-makers can also
consult an environmental atlas for the West African region.
The BIOTA Africa project has made it possible to install
GIS and infrastructure like the Gusõn medicinal botanic garden in Benin or the Information Centre on Biodiversity at
the University of Ouagadougou in Burkina Faso, inaugurated
in January this year. The project has also trained African
students, conservation officials and para-ecologists. The
latter are ecologists who replace formal academic credentials
with on-the-job training. For instance, BIOTA Southern
Africa hired and trained para-ecologists in South Africa and
Namibia to help with field studies and work as field rangers
on nature conservation projects. The para-ecologists were
appointed to facilitate exchanges between researchers and
local land-users. BIOTA trained each para-ecologist in biodiversity
assessment, vegetation monitoring and the use of
technical equipment like global positioning systems. |
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Shea butter tree (Vitellaria paradoxa) in Burkina Faso.
The seeds of this tree are an important source of vegetable oil
in West African countries, both for the rural population and
increasingly for the cosmetics industry. The trees are protected
by farmers when clearing fi elds for cultivation because of
their value and slow growth. |
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Large international collaborative projects like BIOTA
Africa that incorporate experts from both the northern and southern hemispheres are essential for developing balanced
cooperation that transfers knowledge and generates other
benefits for all parties. Political initiatives to ensure access
to biological diversity and to guarantee the fair and equitable
sharing of the benefits arising from their utilization are
important preconditions for such cooperation. These regulations
should not impede non-profit biodiversity research and
scientific cooperation, however. They are an indispensable
prerequisite for deepening our understanding of ecological
systems and the way they function, in order to develop effective
strategies for conservation and sustainable use of ecosystem
services. One way of building mutual trust are participatory
initiatives like the International Plant Exchange Network
established in 2002 by a number of botanical gardens.
Species don’t stop at the border,
neither should monitoring
The overarching benefit for biodiversity conservation could
be spectacular if only the value and endangered status of species
and ecosystems were to be considered on a multilateral
level rather than on a country-by-country basis. Species and
ecosystems cross political borders, so collaboration should
do the same. The conservation of a particular species might
be very difficult or expensive in one country, for example,
because its range overlaps with a highly populated area. |
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The same species might be more easily protected in another
country harbouring a larger wilderness. A collaborative
approach to biodiversity conservation would also offer
opportunities for incorporating the principle of floristic complementarity
when selecting areas for conservation. |
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Protected areas in Africa (top left) and three hypothetical approaches to
conservation. Based on detailed distribution data for about 15% of African
plant species, it is estimated that current protected areas protect about
83% of the species investigated but only 48% of rare plant species. If every
one of the 42 countries in this region were to protect its priority site (circa
10 000 km² each, or 2.1% of sub-Saharan Africa in total) characterized by
the highest plant species richness (unilateral approach), 38% of rare species
might be protected; if, instead, the same number of 42 priority sites
covering about 2.1% of Sub-Saharan Africa were optimized via a hypothetical
Pan-African approach, 62% of rare species might be covered. A pan-African
approach covering 8% of the continent’s surface area (top right) might
even protect 81% of rare plant species. |
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In this regard, the launch of the GEO Global Biodiversity
Observation Network (GEO BON) by Diversitas4 and other
partners in 2008 has been a leap in the right direction.
It is time to shoulder our responsibilities
Although prioritizing areas for biodiversity conservation
is a complex process, today there is a farreaching
consensus among scientists on a global
minimum set of irreplaceable key biodiversity
areas where conservation would be most effective.
However, despite the existence of solid empirical
evidence for nearly a decade, environmental degradation
continues and is even accelerating at many
of these sites.
We know that most of the effects of climate
change on biological systems will only be detectable
on medium- to long-term time scales. Yet, the
funding policy of many science foundations tends
to focus on research projects of 3–5 years duration. This is a terrible impediment to long-term monitoring
of global environmental change and especially
the impact on natural ecosystems.
Biodiversity has no lobby to defend its interests.
Nor do ecosystem services appear on the balance
sheets of traditional economic thinking. The mission
of science is to raise awareness constantly
of the dangers facing biodiversity and sustainable
development. But policy-makers also have a duty
to translate scientific findings into laws and initiatives
and to put adequate prices on the services
provided by nature. Even more importantly, policymakers,
the media and scientists themeselves have
a duty to educate the public better about the value
and vulnerability of biodiversity. |
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Jens Mutke5,7, Jan Henning Sommer5,
Sié Sylvestre Da5,6, Wolfgang Küper5,
Adjima Thiombiano6 and Wilhelm Barthlott5
For details: www.nees.uni-bonn.de
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Mapping the oceans
to save the seas |
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Marine ecosystems provide us with a minimum of US$20.9 trillion in goods
and services every year. Yet, we treat the sea like a sewer, a dump and an
inexhaustible supply of fi sh. The ecological responses tell it all: a loss of over
90% of top predators, collapsing fi sheries and a shift from vertebrate-rich waters
to seas dominated by jellyfi sh, with an increasing number of dead zones. A study
published in Science in 2008 estimated that almost every square kilometre of the oceans
was under threat (see map overleaf). |
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Without a doubt, more must be done to protect the marine realm. But where do we start? Which
approach is the most effective? And what contribution can marine biogeography make? Here we take
a look at some of the global initiatives being undertaken to improve marine conservation, based on a
presentation to the UNESCO conference in January this year on the interface between biodiversity
science and policy. |
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Four of the most common approaches to systematic
conservation planning are: hotspots,
representation, ecoregions and key areas.
Each of these approaches reflects a different
biogeographical concept and data.
Hotspots
The simplest conceptual approach is to
prioritize ‘hotspots’, those areas where there is
most of something. With nearly 100 000 km2
of coral reefs – 34% of the world’s total – and
over 2000 species of reef fish, Southeast Asia is unquestionably
a hotspot of species richness. It is estimated that
the relatively small area between the Philippines, Indonesia
and Papua New Guinea (the ‘Coral Triangle’) harbours
83% of the world’s coral species and 58% of reef fishes
(see map). However, this species richness is primarily
due to a concentration of overlapping distributions of wideranging
species like the Bengal sergeant major (Abudefduf
bengalensis), rather than an abundance of species with restricted ranges (endemics) like the spikefin
goby (Discordipinna griessingeri). |
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The bull’s eye pattern of species richness for reef fi shes (top)
and cowries, a type of seashell (bottom)
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From an ecological perspective, however, it
may be that biodiversity ‘coldspots’, or speciespoor
regions, are more vulnerable. For one thing,
low diversity implies a greater likelihood that the
extinction of one or more species will mean the loss
of a critical ecosystem function. Coldspots also contain
disproportionately large numbers of endemic
species. In 2002, scientists mapped the distributions
of 3235 species of fish, corals, lobsters and snails
and showed that, as on land, restricted-range species
in the sea were concentrated in centres of endemism.
While the hotspot approach is relatively simple, politically
appealing and analytically transparent, assuming
high-quality data, there is a risk that such an approach may
disenfranchise communities in ‘non-hotspot areas’ who also
need to be engaged in the conservation effort.
Representation
A second approach to conservation priority-setting
is to ensure adequate and comprehensive representation
of each habitat type or biogeographical zone.
Devising appropriate classifications of the marine
environment, however, in order to assess representation
at a range of spatial scales is no easy task.
Marine classifications are based on a variety of data
that include direction, the velocity and persistence of
currents; temperature and ice-cover; geomorphology;
satellite images; sonar soundings; faunal records;
biotic associations and percentage of endemism.
‘Rooted’ ecosystems in the sea, such as coral reefs,
seagrass, hydrothermal vent faunas, oyster beds and
soft-coral gardens are easier to map than ecosystems
in the open sea (pelagic zones), notwithstanding the
challenges involved in locating them. |
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Ecoregions
Recently, there has been a shift towards an ‘ecosystem
approach’ in marine conservation, with scientists going
beyond patterns and numbers to consider the ecological
functioning of areas. In this way, linked ecosystems such
as coral reefs, mangroves and seagrass beds are considered
together in an ecoregional management plan.
Key areas
The ‘key areas’ approach does not depend on a prior classification
step but simply focuses on specific locations where
significant ecological processes take place. For example,
key areas include breeding grounds for whales, turtlenesting
beaches, upwelling areas, migration corridors, or
sites where particular threatened species exist.
Juggling different approaches
In practice, international NGOs use a combination of
approaches to help them determine their conservation
priorities. Conservation International’s marine programme
was initially driven by a hotspots approach, combining
hotspots of endemism with hotspots of threat from a
map-based analysis similar to the one shown above.
Currently Conservation International is focusing on three
broader ‘seascapes’ using additional biological and socioeconomic
criteria.
In 1995, the IUCN assessed the degree to which existing
marine protected areas contributed to a representative system
but this initial assessment was hampered by a lack of
an agreed-upon global biogeographical framework. Recent
reviews using the Marine Ecoregions of the World classification8
show that only 16 of the world’s ecoregions have
more than 1% of their area designated as no-take zones.
This classification is now being used in global and regional
conservation planning by the World Wildlife Fund (WWF), |
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Cumulative impact of fi shing, pollution,
invasive species,
ocean acidifi caton and other
threats on marine ecosystems
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the Nature Conservancy and other international NGOs, and
has been adopted as a support tool by the Convention on
Biological Diversity to help increase representation on a global
scale. On smaller scales, the representation principle has
been used successfully, for example, in underpinnng prioritysetting
and zoning for Australia’s Great Barrier Reef.
In 2002, the WWF used an ecoregions approach for their
Global 200 analysis. In the marine realm, ecoregions were
defined, mapped, and assessed for different biodiversity
criteria, such as species richness, endemism, higher taxonomic
uniqueness, unusual ecological or evolutionary
phenomena, and global rarity of habitat type. Ecoregions
were then ranked as globally outstanding, regionally or
bioregionally outstanding, or locally important. Lastly, they
were assessed for the level of threat in order to come up
with a final list of 43 priority marine ecoregions. Of these,
the WWF is currently working in 20 of them.
The key areas approach has been less used in the sea than
on land. However, Large Marine Ecosystems, of which
16 currently receive Global Environment Facility funding,
focus on key areas of productivity. On smaller scales, the
key areas approach has been incorporated within WWF’s
ecoregional planning.
Paper parks?
The implicit assumption of global priority-setting is that local
site-based conservation within high global priority areas is an
appropriate allocation of resources. Funding and resources for
local site-based conservation are thus filtered by the global
framework and may not necessarily take into account the
social realities that govern the success of designated marine
protected areas. Areas defined as priorities by different organizations
commonly overlap (see map). Conversely, significant
areas of the ocean attract no large-scale priority attention, nor
the funding associated with it.
In fact, designated Marine Protected Areas (MPAs)
occur in both priority areas and elsewhere. There are
currently around 5045 designated marine protected areas worldwide. These cover about 4% of the total continental
shelf area, or 0.7% of the ocean’s surface. Even
fewer are ‘no-take’ zones – these represent less
than 0.1% of the world’s ocean surface and
none are on the high seas. Even worse,
estimates of the effective management
of MPAs suggest that most are no
more than ‘paper parks’. As of 2006,
for example, less than 0.01% of the
world’s coral reefs were within MPAs
estimated as no-take zones, with no
poaching and at low risk. |
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Tailoring schemes to the oceans
Most marine conservation still appears to be rooted in the
idea of designating place-based protected areas, undoubtedly
because most conservation planning theory stems
from terrestrial work. While place-based approaches can
contribute, the very nature of the sea means that some of
the conservation approaches developed on land may not
transfer effectively to a marine setting.
This is because the sea differs from the land in physical,
biological and socio-political ways. For example, the sea is
dominated by the high density of water. This allows organisms
to be buoyant in a fully three-dimensional seascape without
expending much energy. Indeed, some spend their entire
lives in the open sea. Unlike rooted trees and grass on land,
most marine plants are microscopic phytoplankton. These are
at the mercy of water movements generated by variations in
temperature, salinity and ocean chemistry and are thus very
dynamic and hard to map. Even animals that spend their adult
lives attached to a substratum (sessile species) or on the seabed
(benthics) generally produce drifting larvae. The fluidity
and relative lack of physical barriers means that much of the
sea is interconnected physically, ecologically and genetically.
Its huge size also enables individuals to move over enormous
distances and allows species to have potentially vast ranges.
The sea is also always downstream from the land. |
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Broad-leaf
Seagrass
(Posidonia
australis)
with a
sponge in
Australia's
Corner Inlet
Marine
National Park |
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These characteristics of the sea, largely beyond our
control, have important implications for biogeography,
for the way threats to biodiversity can spread and for
the efficacy of conservation approaches. For example,
biogeographical regions in the sea are three-dimensional
and their shifting boundaries are difficult to map. On land,
in comparison, rooted plants grow in two-dimensional
regions where transitions are generally more abrupt and
comparatively stable over space and time.
Socio-political factors are more within our control. These
include the demand for marine resources, the open access
nature of much of the sea, perverse subsidies in the fishing
industry, human-induced climate change, poor ocean governance
and conflict resolution, combined with generally
poor knowledge of marine issues.
An effective approach to marine conservation needs
to consider the linkages within and among ecosystems
rather than simply a group of isolated protected areas.
Biogeography can make a significant contribution to
conservation by providing data on the distribution of species
and by answering the question ‘why are things where
they are?’ Our understanding of marine species and their
biogeography lags behind similar work on land. However,
biogeographical science has the potential to further our
understanding of ecological and evolutionary processes,
strengthen the conservation voice in political discourse and
educate and inspire the public to care about marine biodiversity
and the need for a conservation ethic. |
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Sara A. Lourie
Marine biogeographer, Redpath Museum,
McGill University, Quebec, Canada |
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For more information: |
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International Year of Biodiversity: www.unesco.org/en/biodiversity |
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A World of Science online: www.unesco.org/en/a-world-of-science |
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