Securing the future of the sacred Tsenden, Bhutan

Conservation problem

Bhutan’s national tree, Tsenden, is highly sought after for the construction and renovation of religious buildings. However the level of logging has become unsustainable and the tree is now threatened in Bhutan.

Project Goal

GTC is working with local communities to restore populations of Tsenden in the Dangchu valley in order to create a sustainable source of Tsenden timber and eventually provide revenue for local people.

Why this species?

Bhutan’s national tree – Tsenden (Cupressus torulosa) – only occurs naturally in Bhutan and possibly India. Tsenden is of immense cultural and religious importance, making its timber a widely sought after material for the construction and renovation of Bhutanese holy buildings such as Dzongs (temples) and monasteries. These trees are very long lived. A decline in wild Tsenden populations in Bhutan has been observed largely due to unsustainable logging rates.

Essential repairs to Wangduephodrang Dzong. Photo credit: Neil McCheyne/ Benmore Botanical Garden

The Dangchu valley, which houses the largest known population of Tsenden in Bhutan, has been frequently targeted by both legal and illegal loggers. Most recently Dangchu valley Tsenden is being harvested to rebuild the Wangduephodrang Dzong, which was destroyed by fire. The local people of Dangchu valley are concerned about the sustainability of these actions and fear that this culturally important tree is at risk of disappearing. This has led the present Mayor of the Dangchu valley, with the help of local people and the Forestry Department, to establish a nursery to grow Tsenden seedlings.

The spectacular Dangchu valley. Photo credit: Neil McCheyne/ Benmore Botanical Garden

What are we doing?

GTC is working with Royal Botanic Garden Serbithang (RBGS), Royal Botanic Garden Edinburgh (RBGE) and the people of Dangchu village to put Tsenden back on the road to recovery, protecting mature individuals and substantially boosting the number of seedlings planted out. This project will generate new knowledge about Bhutan’s national tree, for example by identifying optimum growing conditions which will allow villagers to plant the trees out in greater numbers. In the long-term, restoration of populations of Tsenden in the Dangchu valley, will create revenue for local people and provide a sustainable source of Tsenden timber. However, it is estimated that the trees take around 70 years to reach a harvestable size, so the Dangchu valley residents are carrying out this project with future generations in mind.

Key project activities include:

  • Identifying suitable mother trees for seed collection
  • Protecting mother trees (important seed sources) from illegal logging through the construction of stone walls and fencing
  • Expanding the community nursery to one hectare, with a production capacity of 20,000 Tsenden per year
  • Using seedlings produced in the nursery to restore sites where trees have been felled

Tsenden seedlings growing from seed collected in 2016 by Royal Botanic Garden Edinburgh Photo credit: Neil McCheyne/ Benmore Botanical Garden

Key achievements

Vital steps have so far been taken to secure this sacred tree. With RGBE, seed has been collected for the past two years from as many mother trees as possible to increase the stock and genetic diversity of the Dangchu valley nursery.

At RBGS special exhibition about Bhutan’s native flora such as Tsenden and the need for its conservation is being developed. BGCI’s education team kick-started this process in November 2016 by running an interpretation design workshop at RBGS.

Exhibition Design Team at Royal Botanic Garden Serbithang. Photo credit: Liliana Derewnicka/BGCI

Contact details

For more information on this project, please contact globaltrees@bgci.org

 

Did you know?

The Vietnamese golden cypress was discovered as a new species to science in 1999.