IUCN SSC Global Tree Specialist Group

About our work

The Global Tree Specialist Group (GTSG) focuses on tree conservation at a global level. In 2021, it contributed to the publication of the State of the World’s Trees report, the first-ever global assessment of all known tree species. Over 80% of the world’s trees (more than 47,000 species) have now been evaluated for the IUCN Red List, making trees one of the most comprehensively assessed groups on the IUCN Red List.

The GTSG comprises over 130 expert members from diverse ...

Mission statement

To halt declines, restore populations, and prevent extinctions of the world’s most threatened trees.

Supporting the Species Conservation Cycle

The Global Tree Specialist Group (GTSG) supports the conservation of tree species through a science-based approach aligned with the IUCN Species Conservation Cycle: Assess, Plan and Act. GTSG contributes to understanding the global status and trends of tree species, developing inclusive, evidence-based conservation strategies, and catalysing targeted action to improve their status. The group involves experts worldwide to inform, prevent extinctions and support the recovery of threatened trees.

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Understand and inform about status of tree species
The GTSG supports maintaining trees as a comprehensively assessed group on the IUCN Red List by conducting and updating over 2,000 assessments annually. We prioritise species for conservation action through targeted priority lists and improve spatial conservation planning by mapping habitats and identifying Key Biodiversity Areas (KBAs) for threatened trees. We also train experts to strengthen the tree assessment capacity.

                                                              
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Develop conservation strategies, plans & policies
The GTSG strengthens global tree conservation by training experts in planning facilitation, mentoring plant conservation planners, and establishing partnerships. We publish conservation action plans, provide case studies and guidance, and develop tools to track progress. Through collaboration, we ensure strategies are science-based, inclusive, practical, and drive effective conservation outcomes.

                                                              
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Mobilize actions to improve the status of trees
The GTSG drives conservation action for threatened trees by catalysing urgent interventions, supporting in situ and ex situ efforts, and integrating tree conservation into protected area management. We share best practices, publish case studies, host webinars, and track conservation actions through the Conservation Action Tracker, ensuring that knowledge is shared and impact is monitored globally.

                                                              