ORCID Profile
0000-0002-1832-5597
Current Organisation
US Geological Survey
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Publisher: Elsevier BV
Date: 07-2008
DOI: 10.1016/J.YMPEV.2008.03.030
Abstract: Climatic fluctuations during the Quaternary resulted in a dynamic history of species' range shifts, fragmentations and expansions. Some of these events left traces in the genetic structures of plants and animals. Recent avian phylogeographic studies demonstrated that Holarctic birds responded idiosyncratically to Pleistocene climate fluctuations. We present phylogeographic analyses of the Holarctic collared sand martin (Riparia riparia) and the Asian pale sand martin (Riparia diluta), which were considered conspecific until recently. Mitochondrial and nuclear sequences confirm species status of the pale sand martin the two species erged sometime between late Pliocene and middle Pleistocene, but precise dates could not be provided without calibration of the substitution rate. Within the pale sand martin, we found two mitochondrial clades that are likely to have erged in the Pleistocene, one from Central Siberia, and the other restricted to Mongolia. The two clades were sympatric with the collared sand martin in Buryatiya and Mongolia, respectively. The mitochondrial gene genealogy and phi(st) analysis of the collared sand martin haplotypes indicate recent, but not ongoing, gene exchange between North America and Eurasia, and restricted gene flow between western and eastern Siberia that likely resulted from historic fragmentation of the species' range during the last glacial maximum.
Publisher: Oxford University Press (OUP)
Date: 22-06-2006
Abstract: Previous phylogeographic studies of the great tit (Parus major) and the willow tit (Parus montanus) found a general absence of phylogeographic structure for both species and suggested that each species underwent range contraction during the last Ice Age and survived in relatively low numbers, P. major in southern Europe and P. montanus in southeastern Asia. However, prior studies did not s le the entire range of either species. We analyzed sequence data for the complete mitochondrial ND2 gene from 87 P. major and 139 P. montanus from 15 new Eurasian localities, both to test prior conclusions and to provide better coverage of each species' range. Our analyses confirmed the absence of phylogeographic structure in P. major and P. montanus and supported the prior refuge hypothesis for P. major. For P. montanus, we concluded that besides surviving the Ice Age in southeastern Asia, as previously hypothesized, it apparently sustained a relatively large population in northern Eurasian riverine thickets and then expanded eastward. Genetic ersity was low in P. major (pi = 0.0012, h = 0.64) and moderate in P. montanus (pi = 0.0021, h = 0.88), suggesting higher long-term effective population sizes and the older ages of populations in P. montanus. If molecular substitution rates are similar, P. montanus colonized its current Eurasian range earlier than P. major. Differences between prior studies and ours likely result from s ling gaps in earlier studies.
Publisher: Springer Science and Business Media LLC
Date: 23-02-2008
Publisher: Elsevier BV
Date: 09-2009
DOI: 10.1016/J.YMPEV.2009.05.016
Abstract: We explored variation in mitochondrial ND2 gene sequences from 171 stonechats (Saxicola torquata complex) collected from 27 Eurasian and 3 African localities. We found that two widespread neighboring Eurasian subspecies of Siberian stonechat, Saxicola maura maura and S. m. stejnegeri, although very similar in appearance, are not each other's closest relatives. Eastern Asian S. m. stejnegeri appears to have split from other Palearctic, African, and island stonechats well before differentiation occurred among the latter taxa. Our data indicate that European (S. t. rubicola), central Palearctic (S. m. maura) and eastern Palearctic (S. m. stejnegeri) are independently evolving, and could each warrant separate species status, as assumed earlier for S. rubicola, S. maura and S. torquata. However, we found three localities at which in iduals from different major groups occurred. Thus, although these are likely phylogenetic species it is unclear whether they are biological species. There was little phylogeographic structure within the three major Palearctic clades, although s les from Spain might be showing incipient ergence. We maintain that the topology of a mtDNA gene tree is a valid means to discern taxonomic limits.
Publisher: Wiley
Date: 08-2020
DOI: 10.1111/MEC.15545
Publisher: Wiley
Date: 07-09-2021
DOI: 10.1111/GEB.13390
Abstract: Macroecological analyses provide valuable insights into factors that influence how parasites are distributed across space and among hosts. Amid large uncertainties that arise when generalizing from local and regional findings, hierarchical approaches applied to global datasets are required to determine whether drivers of parasite infection patterns vary across scales. We assessed global patterns of haemosporidian infections across a broad ersity of avian host clades and zoogeographical realms to depict hotspots of prevalence and to identify possible underlying drivers. Global. 1994–2019. Avian haemosporidian parasites (genera Plasmodium , Haemoproteus , Leucocytozoon and Parahaemoproteus ). We amalgamated infection data from 53,669 in idual birds representing 2,445 species world‐wide. Spatio‐phylogenetic hierarchical Bayesian models were built to disentangle potential landscape, climatic and biotic drivers of infection probability while accounting for spatial context and avian host phylogenetic relationships. Idiosyncratic responses of the three most common haemosporidian genera to climate, habitat, host relatedness and host ecological traits indicated marked variation in host infection rates from local to global scales. Notably, host ecological drivers, such as migration distance for Plasmodium and Parahaemoproteus , exhibited predominantly varying or even opposite effects on infection rates across regions, whereas climatic effects on infection rates were more consistent across realms. Moreover, infections in some low‐prevalence realms were disproportionately concentrated in a few local hotspots, suggesting that regional‐scale variation in habitat and microclimate might influence transmission, in addition to global drivers. Our hierarchical global analysis supports regional‐scale findings showing the synergistic effects of landscape, climate and host ecological traits on parasite transmission for a cosmopolitan and erse group of avian parasites. Our results underscore the need to account for such interactions, in addition to possible variation in drivers across regions, to produce the robust inference required to predict changes in infection risk under future scenarios.
Publisher: Elsevier BV
Date: 10-2010
Publisher: The Royal Society
Date: 07-03-2006
Abstract: The barn swallow ( Hirundo rustica ) is one of most widely distributed swallows, owing in part to its recent switch from natural nest sites to human structures. We conducted phylogenetic analysis of mitochondrial (mt) and nuclear DNA to explore the recent evolutionary history of this species. Strongly supported mtDNA clades corresponded to Europe, Asia and North America plus the Baikal region of Asia. Analysis of sequence data from a sex-linked nuclear gene was unable to recover the phylogenetic splits in the mtDNA tree, confirming that the main clades evolved recently. The phylogenetic pattern suggests that the ancestral area of the barn swallow was the holarctic most ergence events are consistent with vicariance. Most unexpectedly, analyses show that barn swallows from North America colonized the Baikal region in the recent past (one fixed substitution). This dispersal direction is opposite of that for most nearctic–palearctic taxon exchanges. Although this invasion was envisioned to coincide with the appearance of new types of human dwelling in the Baikal region, calibration of molecular ergence suggests an older dispersal event. A recent history of gene flow within the main palearctic clades is consistent with range and population expansion owing to new nesting opportunities provided by human settlements. Contrary to expectation, populations in North America appear historically larger and more stable than those in the palearctic. The Baikal population apparently has not increased greatly since colonization.
Location: United States of America
No related grants have been discovered for Serguei Drovetski.