RT Journal Article
T1 A tale of two forests: ongoing aridification drives population decline and genetic diversity loss at continental scale in Afro-Macaronesian evergreen-forest archipelago endemics
A1 Mairal Pisa, Mario José
A1 Caujapé-Castells, Juli
A1 Pellissier, Loïc
A1 Jaén-Molina, Ruth
A1 Álvarez, Nadir
A1 Heuertz, Miriam
A1 Sanmartín, Isabel
AB Background and Aims Various studies and conservationist reports have warned about the contraction of the last subtropical Afro-Macaronesian forests. These relict vegetation zones have been restricted to a few oceanic and continental islands around the edges of Africa, due to aridification. Previous studies on relict species have generally focused on glacial effects on narrow endemics; however, little is known about the effects of aridification on the fates of previously widespread subtropical lineages.• Methods Nuclear microsatellites and ecological niche modelling were used to understand observed patterns of genetic diversity in two emblematic species, widely distributed in these ecosystems: Canarina eminii (a palaeoendemic of the eastern Afromontane forests) and Canarina canariensis (a palaeoendemic of the Canarian laurel forests). The software DIYABC was used to test alternative demographic scenarios and an ensemble method was employed to model potential distributions of the selected plants from the end of the deglaciation to the present.• Key Results All the populations assessed experienced a strong and recent population decline, revealing that locally widespread endemisms may also be alarmingly threatened.• Conclusions The detected extinction debt, as well as the extinction spiral to which these populations are subjected, demands urgent conservation measures for the unique, biodiversity-rich ecosystems that they inhabit.
PB Oxford Academic
SN 0305-7364
SN 1095-8290
YR 2018
FD 2018
LK https://hdl.handle.net/20.500.14352/97519
UL https://hdl.handle.net/20.500.14352/97519
LA eng
NO Mario Mairal, Juli Caujapé-Castells, Loïc Pellissier, Ruth Jaén-Molina, Nadir Álvarez, Myriam Heuertz, Isabel Sanmartín, A tale of two forests: ongoing aridification drives population decline and genetic diversity loss at continental scale in Afro-Macaronesian evergreen-forest archipelago endemics, Annals of Botany, Volume 122, Issue 6, 2 November 2018, Pages 1005–1017, https://doi.org/10.1093/aob/mcy107
DS Docta Complutense
RD 22 jul 2024