Markolf, Matthias

[["dc.bibliographiccitation.artnumber","216"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","BMC Evolutionary Biology"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Markolf, Matthias"],["dc.contributor.author","Brameier, Markus"],["dc.contributor.author","Kappeler, Peter"],["dc.date.accessioned","2017-09-07T11:48:53Z"],["dc.date.available","2017-09-07T11:48:53Z"],["dc.date.issued","2011"],["dc.description.abstract","BACKGROUND:Although most taxonomists agree that species are independently evolving metapopulation lineages that should be delimited with several kinds of data, the taxonomic practice in Malagasy primates (Lemuriformes) looks quite different. Several recently described lemur species are based solely on evidence of genetic distance and diagnostic characters of mitochondrial DNA sequences sampled from a few individuals per location. Here we explore the validity of this procedure for species delimitation in lemurs using published sequence data.RESULTS:We show that genetic distance estimates and Population Aggregation Analysis (PAA) are inappropriate for species delimitation in this group of primates. Intra- and interspecific genetic distances overlapped in 14 of 17 cases independent of the genetic marker used. A simulation of a fictive taxonomic study indicated that for the mitochondrial D-loop the minimum required number of individuals sampled per location is 10 in order to avoid false positives via PAA.CONCLUSIONS:Genetic distances estimates and PAA alone should not be used for species delimitation in lemurs. Instead, several nuclear and sex-specific loci should be considered and combined with other data sets from morphology, ecology or behavior. Independent of the data source, sampling should be done in a way to ensure a quantitative comparison of intra- and interspecific variation of the taxa in question. The results of our study also indicate that several of the recently described lemur species should be reevaluated with additional data and that the number of good species among the currently known taxa is probably lower than currently assumed."],["dc.identifier.doi","10.1186/1471-2148-11-216"],["dc.identifier.gro","3150897"],["dc.identifier.pmid","21777472"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/6852"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7695"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","1471-2148"],["dc.rights","CC BY 2.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/2.0"],["dc.title","On species delimitation: Yet another lemur species or just genetic variation?"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","70"],["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Frontiers in Zoology"],["dc.bibliographiccitation.lastpage","16"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Markolf, Matthias"],["dc.contributor.author","Kappeler, Peter"],["dc.date.accessioned","2017-09-07T11:48:37Z"],["dc.date.available","2017-09-07T11:48:37Z"],["dc.date.issued","2013"],["dc.description.abstract","IntroductionDue to its remarkable species diversity and micro-endemism, Madagascar has recently been suggested to serve as a biogeographic model region. However, hypothesis-based tests of various diversification mechanisms that have been proposed for the evolution of the island’s micro-endemic lineages are still limited. Here, we test the fit of several diversification hypotheses with new data on the broadly distributed genus Eulemur using coalescent-based phylogeographic analyses.ResultsTime-calibrated species tree analyses and population genetic clustering resolved the previously polytomic species relationships among eulemurs. The most recent common ancestor of eulemurs was estimated to have lived about 4.45 million years ago (mya). Divergence date estimates furthermore suggested a very recent diversification among the members of the “brown lemur complex”, i.e. former subspecies of E. fulvus, during the Pleistocene (0.33-1.43 mya). Phylogeographic model comparisons of past migration rates showed significant levels of gene flow between lineages of neighboring river catchments as well as between eastern and western populations of the redfronted lemur (E. rufifrons).ConclusionsTogether, our results are concordant with the centers of endemism hypothesis (Wilmé et al. 2006, Science 312:1063–1065), highlight the importance of river catchments for the evolution of Madagascar’s micro-endemic biota, and they underline the usefulness of testing diversification mechanisms using coalescent-based phylogeographic methods."],["dc.identifier.doi","10.1186/1742-9994-10-70"],["dc.identifier.gro","3150867"],["dc.identifier.pmid","24228694"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10050"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7661"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","1742-9994"],["dc.rights","CC BY 2.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/2.0"],["dc.title","Phylogeographic analysis of the true lemurs (genus Eulemur) underlines the role of river catchments for the evolution of micro-endemism in Madagascar"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","21"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","The Open Conservation Biology Journal"],["dc.bibliographiccitation.lastpage","29"],["dc.bibliographiccitation.volume","2"],["dc.contributor.author","Markolf, Matthias"],["dc.contributor.author","Roos, Christian"],["dc.contributor.author","Kappeler, Peter"],["dc.date.accessioned","2017-09-07T11:48:52Z"],["dc.date.available","2017-09-07T11:48:52Z"],["dc.date.issued","2008"],["dc.description.abstract","Population bottlenecks as a result of habitat fragmentation or other anthropogenic disturbances are increasingly common, but their consequences remain poorly studied. We studied the genetic population structure of a solitary nocturnal primate, Mirza coquereli, to investigate the demographic history of a local subpopulation in Kirindy Forest, western Madagascar, which showed recent dramatic fluctuations in population size. Additionally, we sampled the surrounding forest area to assess the genetic structure of the local population on a broader geographical scale. Analyses of mitochondrial DNA (mtDNA) and microsatellites of 53 individuals revealed that a recent reduction and subsequent recovery in population size (demographic bottleneck) in the local subpopulation did not result in a genetic bottleneck. Moreover, predicted matrilineal clusters and male-biased dispersal could be confirmed on a broader geographical scale by mtDNA analysis, but not by microsatellite analyses. These results suggest that a re-colonization of the demographic bottlenecked area took place. This study contributes to our knowledge of the genetic structure of solitary mammals and primates in particular and illuminates behavioral mechanisms, such as sex-specific dispersal, that influence the genetic structure of populations. Furthermore, we showed that populations of solitary mammals are able to compensate drastic local demographic changes via migration if habitat continuity at an appropriate scale is given."],["dc.identifier.doi","10.2174/1874839200802010021"],["dc.identifier.gro","3150886"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/6975"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7683"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","1874-8392"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Genetic and Demographic Consequences of a Rapid Reduction in Population Size in a Solitary Lemur (Mirza coquereli)"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]