Magnus Popp results 13
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Genetic Diversity Is Not Correlated With Species Diversity: A Multispecies Study in a Continental Habitat Island SystemNARA Subscribed
Aim It has been proposed that species diversity (SD) and genetic diversity (GD) co‐vary across natural communities because both are shaped by processes such as immigration and drift. However, empirical reports are contradictory, and multispecies studies are rare. Here we test the hypothesis that the two diversity measures do not correlate in systems with high levels of immigration stochasticity and little GD caused by strong g...
Prolonging survival in good health is a fundamental societal goal. However, the leading determinants of disability-free survival in healthy older people have not been well established. Data from ASPREE, a bi-national placebo-controlled trial of aspirin with 4.7 years median follow-up, was analysed. At enrolment, participants were healthy and without prior cardiovascular events, dementia or persistent physical disability. Disab...
The monumental work of Olov Hedberg provided deep insights into the spectacular and fragmented tropical alpine flora of the African sky islands. Here we review recent molecular and niche modelling studies and re-examine Hedberg’s hypotheses and conclusions. Colonisation started when mountain uplift established the harsh diurnal climate with nightly frosts, accelerated throughout the last 5 Myr (Plio-Pleistocene), and resulted...
High tropical mountains harbour remarkable and fragmented biodiversity thought to a large degree to have been shaped by multiple dispersals of cold‐adapted lineages from remote areas. Few dated phylogenetic/phylogeographic analyses are however available. Here, we address the hypotheses that the sub‐Saharan African sweet vernal grasses have a dual colonization history and that lineages of independent origins have established se...
Aim Many arctic species are believed to be descendants from ancestors that migrated northwards from high mountains during the formation of the modern arctic biome 2–3 million years ago (Ma). Here, we test whether this hypothesis is consistent with the biogeographical history of the arctic‐alpine genus Diapensia , which shows a disjunction between the Arctic and the Himalayan–Hengduan Mountains ( HHM ). Location The Arctic/sub‐...
A common challenge in phylogenetic reconstruction is to find enough suitable genomic markers to reliably trace splitting events with short internodes. Here, we present phylogenetic analyses based on genomewide single‐nucleotide polymorphisms ( SNP s) of an enigmatic avian radiation, the subspecies complex of Afrocanarian blue tits ( Cyanistes teneriffae ). The two sister species, the Eurasian blue tit ( Cyanistes caeruleus ) a...
Use of Ancient Sedimentary DNA as a Novel Conservation Tool for High‐Altitude Tropical BiodiversityNARA Subscribed
Conservation of biodiversity may in the future increasingly depend upon the availability of scientific information to set suitable restoration targets. In traditional paleoecology, sediment‐based pollen provides a means to define preanthropogenic impact conditions, but problems in establishing the exact provenance and ecologically meaningful levels of taxonomic resolution of the evidence are limiting. We explored the extent to...
Circumarctic dispersal and long‐distance colonization of South America: the moss genus CinclidiumNARA Subscribed
Aim Arctic plant phylogeography has largely focused on seed plants, and studies on other plant groups are necessary for comparison. Bryophytes have a unique life cycle and can be resistant to extreme conditions, suggesting that their phylogeographic patterns may differ from those of vascular plants. We address the history of the bryophyte genus Cinclidium in order to assess: (1) interspecific relationships, (2) whether its cur...
ORIGINAL ARTICLE: Colonization and diversification in the African ‘sky islands’ by Eurasian Lychnis L. (Caryophyllaceae)NARA Subscribed
Aim Many plants occurring on the isolated mountain peaks of Africa have their closest relatives in very remote areas, even in temperate Europe and Asia. Their biogeographical history is poorly understood. The Afro‐montane element of the primarily Eurasian genus Lychnis is a typical example of such a disjunction. Here, we aim to reconstruct the phylogeny of the Afro‐montane endemics of Lychnis and to infer the history of immigr...
Aim Carex atrofusca has an arctic–alpine distribution in the Northern Hemisphere, with only a few, disjunct localities known in the European Alps. These alpine populations are declining in number and size. In contrast, C. atrofusca has a wide circumpolar distribution range and is abundant in large parts of the Arctic. The degree of genetic differentiation of the alpine populations and their importance for the conservation of t...
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