Tree Conservation

Botanic gardens are ideally placed to lead innovative conservation initiatives for threatened trees around the world.

Why Trees?

Trees are essential to life on Earth. They play important ecological, cultural and economic roles. Trees support; species diversity, food webs, habitats and numerous ecological processes such as water and air purification. The importance of trees to regulating climate and soil fertility is essential for the planet. Humans are also dependent on trees for food, fuel, timber, medicine and much more giving trees huge economic and livelihood value.

Despite the global importance of trees, many species are under significant threat in the wild. Currently, it is estimated that at least 11,000 tree species are threatened with extinction in the wild. This means at least 19% of tree species are at risk of being lost forever and with them the services they provide people and the planet. Over exploitation is a major threat to the species, with some trees being over harvested for their timber or medicinal values. Others are experiencing population decline due to habitat loss and deforestation driven by human development and land use change in dominated landscapes. Climate change drives a number of threats to tree species such as increased occurrence of fire or cyclones. Globalisation has driven the transfer of exotic pests and diseases across the world, and many common tree species are now threatened due to susceptibility to these invasive species.

BGCI’s Work with Trees

Trees need our protection. To maintain the variety of services trees provide, an equivalent diversity of tree species needs to be conserved. Botanic gardens are ideally placed to lead innovative conservation initiatives to save trees at the species level. They have extensive horticultural and scientific expertise, maintain conservation collections of living trees and seeds and are experienced in implementing recovery and restoration programmes for threatened species. They also have considerable outreach potential to raise awareness of the importance of tree conservation and to increase the capacity and skills of local communities to take action for the conservation of threatened trees of local or national importance.

BGCI works with botanic gardens and partners in a variety of ways to pursue tree conservation. We currently work with partners in China, Nepal, Taiwan, Argentina, Georgia, Mexico, Cuba, Fiji, Kenya, Tanzania and Zimbabwe to protect the world’s most threatened tree species.

Tree Conservation Activities

To save trees in the wild BGCI partnered with Fauna and Flora International (FFI) to establish and lead the Global Trees Campaign (GTC). This joint initiative works with partners across the world to protect the world’s most threatened tree species through direct, practical and innovative interventions. To date, GTC has safeguarded 180 tree species in 29 countries worldwide. It is the only global conservation programme dedicated to saving all of the world’s threatened tree species.

The Global Trees Campaign pursues a variety of in situ and ex situ conservation efforts to protect trees in the wild. A tailored approach is taken by in-country partners who are best placed to guide conservation of individual tree species using their local knowledge and expertise. This can involve seed collection, establishing nurseries, protecting remaining individuals, restoration planting and much more. GTC leads training to support local conservationists to develop skills for effective tree species conservation, and to become champions for threatened trees in their region.

Projects on Tree Conservation


Global Tree Assessment

The Global Tree Assessment (GTA) aims to assess the conservation status of every known tree species by the year 2020.
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Assessing Timber Species

Over five years (2016-2021), BGCI will produce IUCN Red List assessments for over 1,500 timber tree species. This work also contributes to BGCI’s Global Tree Assessment.
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Global Trees Campaign

The only global conservation programme dedicated to saving all of the world's threatened tree species.
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BGCI also hosts the IUCN Species Survival Commission Global Tree Specialist Group (GTSG). This group of taxonomic and regional tree experts assist BGCI and GTC conservation efforts. With the GTSG, BGCI also collaborate on the Global Tree Assessment, an initiative to produce conservation assessments for all the world’s tree species by 2020. The production of conservation assessments enables the identification of the globally most threatened tree species (Critically Endangered, Endangered, Vulnerable), prioritising them for conservation action by BGCI and partners. BGCI also produces ex situ surveys for different tree groups, to determine which threatened trees species are secure in botanic garden and arboreta and which species need prioritisation for ex situ collection.

BGCI is establishing a series of consortia with specialist knowledge of particular genera that are technically challenging to conserve and manage. Working with four different gardens, consortia have been set up for Acer, Rhododendron, Oak and Magnolia. The goals of the consortia align with the GSPC, prioritising species of greatest concern for action including conserving Endangered and Critically Endangered species in their natural habitats and in a network of ex situ collections. The consortia will also undertake research on a variety of issues affecting threatened taxa within the groups.

News on Tree Conservation

Introductory Meetings for the Global Conservation Consortium for Magnolia

BGCI and Atlanta Botanical Garden are pleased to have hosted introductory meetings for the Global Conservation Consortium for Magnolia (GCCM).
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Maples Turning Red

The Red List of Acer: revised and extended, published in September 2020 by Botanic Gardens Conservation International (BGCI), gives the conservation status of all 158 maple or Acer species.
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Tree collections turnover: one-minute survey

Tree collections turnover: one minute survey
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Resources on Tree Conservation

  • Integrated Conservation of Tree Species by Botanic Gardens: a reference manual

    Tree Conservation, Conservation Prioritisation / Publication / English, Spanish