Université de Fribourg

The woody planet : from past triumph to manmade decline

Fazan, Laurence ; Song, Yi-Gang ; Kozlowski, Gregor

In: Plants, 2020, vol. 9, no. 11, p. 1593

Woodiness evolved in land plants approximately 400 Mya, and very soon after this evolutionary invention, enormous terrestrial surfaces on Earth were covered by dense and luxurious forests. Forests store close to 80% of the biosphere’s biomass, and more than 60% of the global biomass is made of wood (trunks, branches and roots). Among the total number of ca. 374,000 plant species worldwide,...

Université de Fribourg

Phylogeny, taxonomy, and biogeography of Pterocarya (Juglandaceae)

Song, Yi-Gang ; Li, Ying ; Meng, Hong-Hu ; Fragnière, Yann ; Ge, Bin-Jie ; Sakio, Hitoshi ; Yousefzadeh, Hamed ; Bétrisey, Sébastien ; Kozlowski, Gregor

In: Plants, 2020, vol. 9, no. 11, p. 1524

Relict species play an important role in understanding the biogeography of intercontinental disjunctions. Pterocarya (a relict genus) is the valuable model taxon for studying the biogeography of East Asian versus southern European/West Asian disjunct patterns. This disjunction has not been as well studied as others (e.g., between Eastern Asia and North America). Several phylogenetic studies...

Université de Fribourg

Shining a light on species delimitation in the tree genus Engelhardia Leschenault ex Blume (Juglandaceae)

Zhang, Can-Yu ; Low, Shook Ling ; Song, Yi-Gang ; Nuraina ; Kozlowski, Gregor ; Do, Truong Van ; Li, Lang ; Zhou, Shi-Shun ; Tan, Yun-Hong ; Cao, Guan-Long ; Zhou, Zhuo ; Meng, Hong-Hu ; Li, Jie

In: Molecular Phylogenetics and Evolution, 2020, vol. 152, p. 106918

Enhanced efficacy in species delimitation is critically important in biology given the pending biodiversity crisis under global warming and anthropogenic activity. In particular, delineation of traditional classifications in view of the complexity of species requires an integrative approach to effectively define species boundaries, and this is a major focus of systematic biology. Here, we...

Université de Fribourg

Predicting climate change impacts on the threatened Quercus arbutifolia in montane cloud forests in southern China and Vietnam: Conservation implications

Song, Yi-Gang ; Petitpierre, Blaise ; Denga, Min ; Wu, Jin-Ping ; Kozlowski, Gregor

In: Forest Ecology and Management, 2019, vol. 444, p. 269–279

Trees of montane cloud forests (MCFs) often have small and isolated populations and face numerous threats. Due to limited conservation resources, management decisions are often based on scarce biological information. This study investigated the current status of populations of the critically endangered oak species Quercus arbutifolia in southern China, including its distribution, threats,...

Université de Fribourg

Species delimitation in the East Asian species of the relict tree genus Zelkova (Ulmaceae): A complex history of diversification and admixture among species

Naciri, Yamama ; Christe, Camille ; Bétrisey, Sébastien ; Song, Yi-Gang ; Deng, Min ; Garfì, Giuseppe ; Kozlowski, Gregor

In: Molecular Phylogenetics and Evolution, 2019, vol. 134, p. 172–185

Zelkova species, trees of the elm family (Ulmaceae), are part of the Cenozoic relict flora. In western Eurasia, the genus comprises three species that are restricted to disjunct areas (Z. sicula on Sicily, Z. abelicea on Crete and Z. carpinifolia in Transcaucasia). The situation is different in East Asia, where three species (Z. serrata, Z. schneideriana and Z. sinica) have at least partly...