16 Conservation News


Ex situ planting movement for Indonesia’s threatened trees


A recent IUCN press release (bit.ly/4ioZaJr) revealed that 16,425 of 47,282 assessed tree species are now categorized as threatened, comprising .25% of species assessed on the IUCN Red List. The number of threatened trees sur- passes that of all threatened birds, mammals, reptiles and amphibians, and spans 192 countries. Indonesia is home to c. 5,918 tree species (BGCI, 2024,


bit.ly/3D41zcz). A total of 5,261 (.88%) of Indonesia’s tree species have been assessed for the IUCN Red List, with 1,178 (22%) categorized as threatened. Based on the ex situ collection database of botanic gardens in Indonesia, managed by the National Research and Innovation Agency (makoyana.brin.go.id), only 180 (c. 15%) of threatened Indonesian tree species are represented in these ex situ collections. To support the ex situ conservation of threatened


Indonesian trees, Forum Pohon Langka Indonesia has de- veloped the Ex-Situ Network Program, which is dedicated solely to providing seedlings of threatened tree species. The network currently consists of 15 local nurseries across nine provinces. Utilizing the seedlings available in these nurseries, we organized a simultaneous tree-planting movement on Indonesia’s National Tree Planting Day, 28 November 2024. We successfully planted 402 individuals of 41 species, including eight Critically Endangered, seven Endangered and 17 Vulnerable species. A total of 21 institu- tions participated, representing 11 provinces from Sumatra to Papua. We hope this movement, to be repeated annually, will


Ulmus elongata: (a) inflorescence, (b) seeds, (c) seed collection in its natural habitat, (d) germinated seedlings, (e) planting stock, (f) planting activities, and (g) following reintroduction. Photos: Yali Li.


to the species’ natural range (an orchard at Bapi Mountain in Zhenping County, near the former primary school in Hongxing Village, Niutoudian Town, the Qinling National Botanical Garden, and Zhashui County in Shangluo City, Shaanxi Province), establishing new pop- ulations of U. elongata. Monitoring of seedling survival is ongoing.


DI CHEN1 ,YALI LI1 (chairsh@126.com) and


XIANGYING WEN2,3 1Qinling National Botanical Garden, Xi’an, China. 2South


China National Botanical Garden, Guangzhou, China. 3Botanic Gardens Conservation International China Office, Guangzhou, China


This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence CC BY 4.0.


ensure greater representation of threatened tree species in ex situ collections. We will coordinate with all participants to ensure proper maintenance of the seedlings planted in their institutions, and work to expand the ex situ network to guarantee the availability of threatened Indonesian trees seedlings for future planting initiatives.


MOKHAMAD NUR ZAMAN1 ,ARIEF HAMIDI1 and IYAN ROBIANSYAH1,2


(iyan.robiansyah@brin.go.id)


1Forum Pohon Langka Indonesia, Bogor, Indonesia. 2Research Center for Ecology and Ethnobiology, National Research and Innovation Agency, Cibinong, Indonesia


This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence CC BY 4.0.


The last remaining southern muriquis Brachyteles arachnoidesfrom the interior of São Paulo state, Brazil


The southern muriqui Brachyteles arachnoides, one of the largest primates in the Americas, is categorized as Critically Endangered on the IUCN Red List. It is endemic


Oryx, 2025, 59(1), 10–18 © The Author(s), 2025. Published by Cambridge University Press on behalf of Fauna & Flora International doi:10.1017/S0030605324001807


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