For decades now, tree lovers and
environmentalists across the country have been campaigning against a tree
species. The vilayati kikar, Prosopis juliflora, allows no other species to
thrive. The Delhi government recently gave its nod to clearing the Central
Ridge of the non-native tree in the hope that the area’s original
flora — which are called the lungs of the city — as well as fauna can be
restored.
Vilayati kikar and its weedlike
properties — fast growth in arid conditions, killing any competition and
water-table depletion —have been documented by several scientists and
activists in Delhi, Haryana, Rajasthan, Gujarat, as well as Tamil
Nadu, where it is called karuvelam and is used as firewood. The Madras
High Court, in 2016, passed an interim order clearing removal of these
trees as they were depleting the water table in areas already struggling for
water. In 2017, the court started monitoring the removal of the kikar.
Delhi’s fight against the tree
gained ground in the 1990s with court cases, representations to government, and
research papers. The transformation of the Yamuna Biodiversity Park in
Wazirabad, however, is what gave the forest department faith that the plan
could work.
According to C R Babu, who heads
the Centre for Environmental Management of Degraded Ecosystems (CEMDE),
the organisation that will conduct the first phase of the removal over 100
acres between Dhaula Kuan and Chanakyapuri, the tree was brought to Delhi by
the British in the early 1930s. By the end of the decade, it had taken over
the Ridge completely, killing the native acacia, dhak, kadamb, amaltas,
flame-of-the-forest etc. Along with the trees disappeared the fauna —
birds, butterflies, leopards, porcupines and jackals.
The removal
Cutting down vilayati kikar
and waiting for the other plants to grow is a counterproductive move for
two reasons. First, the tree can regenerate from the root; second,
leaving the Ridge barren and waiting for native species to grow will leave
the city with barely any green cover, and invite encroachers.
In a plan made for Delhi but one
that could well be replicated elsewhere, CEMDE has taken the stumbling blocks
into account.
“The first step is to cut the
trees’ branches and reduce the foliage cover so that sunlight can
reach the ground. This cuts the tree’s capability to produce food and
it starts to wither. Alongside, it gives enough sunlight and water to
saplings,” Babu said.
Another method being used to
expedite the process is planting parasitic, but native, vines that will cut
the access of vilayati kikar to sunlight while taking away nutrients.
“The vines are native to Delhi.
They quickly spread across the foliage and cut off the tree’s access to light,
slowly killing it,” a senior forest department official said.
The replacement
Replacing the vilayati kikar, a
crucial part of the project, will have to be a scientific exercise to make sure
Delhi gets the Ridge of the early 1900s. “We have identified 30 tree
communities such as butea, Sterculia, and Acacia and others that are all
native to India. Some of these have a canopy that is three storeys tall and
will dwarf any remaining kikars when full-grown. We will plant the saplings
when they are 3 to 6 feet tall to give them a good chance of survival,” Babu
said.
Sourcing the saplings is
another challenge. Since many of these species have been eradicated from the
wild in Delhi, the city is looking to communities in Haryana and Gujarat for
help. “Once the trees reach fruit-bearing age, propagation will be unassisted,”
Babu said.
The precedent
A reassurance is the similar
model that has yielded results already, although on a smaller scale. Work
started on developing the Yamuna Biodiversity Park in Wazirabad in 2002.
Spread over 457 acres, the park is home to native tree, shrub, and creeper
species, and houses several small water-bodies and boasts a healthy water
table. Its most famous visitor, perhaps, was a young leopard that was
spotted in November 2016.
For the scientists who run the
park, it was a sign that what they had set out to do was being achieved. The leopard
stayed for close to a month. Leopards only stay in an area for long if they
find a suitable habitat — enough prey, water resources and some anonymity.
While the leopard was shifted
out, the biodiversity remains — something CEMDE hopes can be replicated on the
Ridge.
Credit: Indian Express Explained
(http://indianexpress.com/article/explained/delhi-government-vilayati-kikar-removal-order-environmental-impact-5194797/)
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