Markolf, Matthias

[["dc.bibliographiccitation.journal","International Journal of Primatology"],["dc.contributor.author","Markolf, Matthias"],["dc.contributor.author","Zinowsky, Max"],["dc.contributor.author","Keller, Judith Katharina"],["dc.contributor.author","Borys, Johannes"],["dc.contributor.author","Cillov, Ali"],["dc.contributor.author","Schülke, Oliver"],["dc.date.accessioned","2022-04-01T10:01:05Z"],["dc.date.available","2022-04-01T10:01:05Z"],["dc.date.issued","2022"],["dc.description.abstract","Abstract Developing new cost-effective methods for monitoring the distribution and abundance of species is essential for conservation biology. Passive acoustic monitoring (PAM) has long been used in marine mammals and has recently been postulated to be a promising method to improve monitoring of terrestrial wildlife as well. Because Madagascar’s lemurs are among the globally most threatened taxa, this study was designed to assess the applicability of an affordable and open-source PAM device to estimate the density of pale fork-marked lemurs ( Phaner pallescens ). Using 12 playback experiments and one fixed transect of four automated acoustic recorders during one night of the dry season in Kirindy Forest, we experimentally estimated the detection space for Phaner and other lemur vocalizations. Furthermore, we manually annotated more than 10,000 vocalizations of Phaner from a single location and used bout rates from previous studies to estimate density within the detection space. To truncate detections beyond 150 m, we applied a sound pressure level (SPL) threshold filtering out vocalizations below SPL 50 (dB re 20 μPa). During the dry season, vocalizations of Phaner can be detected with confidence beyond 150 m by a human listener. Within our fixed truncated detection area corresponding to an area of 0.07 km 2 (detection radius of 150 m), we estimated 10.5 bouts per hour corresponding to a density of Phaner of 38.6 individuals/km 2 . Our density estimates are in line with previous estimates based on individually marked animals conducted in the same area. Our findings suggest that PAM also could be combined with distance sampling methods to estimate densities. We conclude that PAM is a promising method to improve the monitoring and conservation of Phaner and many other vocally active primates."],["dc.identifier.doi","10.1007/s10764-022-00285-z"],["dc.identifier.pii","285"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/105596"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-530"],["dc.relation.eissn","1573-8604"],["dc.relation.issn","0164-0291"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Toward Passive Acoustic Monitoring of Lemurs: Using an Affordable Open-Source System to Monitor Phaner Vocal Activity and Density"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["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.journal","Conservation Science and Practice"],["dc.contributor.author","Kappeler, Peter M."],["dc.contributor.author","Markolf, Matthias"],["dc.contributor.author","Rasoloarison, Rodin M."],["dc.contributor.author","Fichtel, Claudia"],["dc.contributor.author","Durbin, Joanna"],["dc.date.accessioned","2022-09-01T09:50:40Z"],["dc.date.available","2022-09-01T09:50:40Z"],["dc.date.issued","2022"],["dc.identifier.doi","10.1111/csp2.12776"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/113772"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-597"],["dc.relation.eissn","2578-4854"],["dc.relation.issn","2578-4854"],["dc.rights.uri","http://creativecommons.org/licenses/by/4.0/"],["dc.title","Complex social and political factors threaten the world's smallest primate with extinction"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","37"],["dc.bibliographiccitation.journal","Lemur News"],["dc.bibliographiccitation.lastpage","40"],["dc.bibliographiccitation.volume","134"],["dc.contributor.author","Markolf, Matthias"],["dc.contributor.author","Kappeler, Peter"],["dc.contributor.author","Rasoloarison, Rodin M."],["dc.date.accessioned","2017-11-15T12:09:21Z"],["dc.date.available","2017-11-15T12:09:21Z"],["dc.date.issued","2008"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/10020"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","1608-1439"],["dc.title","Distribution and conservation status of Mirza zaza"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","233"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","BMC Evolutionary Biology"],["dc.bibliographiccitation.volume","13"],["dc.contributor.author","Markolf, Matthias"],["dc.contributor.author","Rakotonirina, Hanitriniaina"],["dc.contributor.author","Fichtel, Claudia"],["dc.contributor.author","von Grumbkow, Phillip"],["dc.contributor.author","Brameier, Markus"],["dc.contributor.author","Kappeler, Peter"],["dc.date.accessioned","2017-09-07T11:48:20Z"],["dc.date.available","2017-09-07T11:48:20Z"],["dc.date.issued","2013"],["dc.description.abstract","Background: Species are the fundamental units in evolutionary biology. However, defining them as evolutionaryindependent lineages requires integration of several independent sources of information in order to develop robusthypotheses for taxonomic classification. Here, we exemplarily propose an integrative framework for speciesdelimitation in the “brown lemur complex” (BLC) of Madagascar, which consists of seven allopatric populations ofthe genus Eulemur (Primates: Lemuridae), which were sampled extensively across northern, eastern and westernMadagascar to collect fecal samples for DNA extraction as well as recordings of vocalizations. Our data base wasextended by including museum specimens with reliable identification and locality information for skull shape andpelage color analysis.Results: Between-group analyses of principal components revealed significant heterogeneity in skull shape, pelagecolor variation and loud calls across all seven populations. Furthermore, post-hoc statistical tests between pairs ofpopulations revealed considerable discordance among different data sets for different dyads. Despite a high degreeof incomplete lineage sorting among nuclear loci, significant exclusive ancestry was found for all populations,except for E. cinereiceps, based on one mitochondrial and three nuclear genetic loci.Conclusions: Using several independent lines of evidence, our results confirm the species status of the members ofthe BLC under the general lineage concept of species. More generally, the present analyses demonstrate theimportance and value of integrating different kinds of data in delimiting recently evolved radiations."],["dc.identifier.doi","10.1186/1471-2148-13-233"],["dc.identifier.gro","3150784"],["dc.identifier.pmid","24159931"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7574"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","1471-2148"],["dc.subject","Species delimitation; Eulemur; Madagascar; Taxonomic inflation; Integrative taxonomy"],["dc.title","True lemurs…true species - species delimitation using multiple data sources in the brown lemur complex"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["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","259"],["dc.bibliographiccitation.lastpage","270"],["dc.contributor.author","Dammhahn, Melanie"],["dc.contributor.author","Markolf, Matthias"],["dc.contributor.author","Lührs, Mia-Lana"],["dc.contributor.author","Thalmann, Urs"],["dc.contributor.author","Kappeler, Peter"],["dc.contributor.editor","Goodman, S. M."],["dc.contributor.editor","Gautier, L."],["dc.contributor.editor","Raherilalao, M. J."],["dc.date.accessioned","2017-11-15T12:24:30Z"],["dc.date.available","2017-11-15T12:24:30Z"],["dc.date.issued","2013"],["dc.description.abstract","Explaining the biodiversity and, in particular, the high levels of microendemism of primates in Madagascar has been a scientific challenge for many decades. A prerequisite to our understanding of lemur biogeography is high-resolution spatial data based on homogenous sampling effort across the island. Although the distribution of lemurs is comparatively well documented, some areas of Madagascar have been poorly surveyed. Among these zones is the large zone of microendemism between the Tsiribihina and the Betsiboka Rivers in western Madagascar. Here, we add new data on the distribution of several less known lemur species in this area. Two rapid lemur surveys in combination with hitherto unpublished information confirms the presence of at least 11 primate species from all five lemur families in the Beanka Forest - an isolated fragment of dry deciduous forest on limestone close to Maintirano. This level of species diversity is considerable and exceeds most other dry deciduous forests on the island. The specific determinations of Cheirogaleus sp. indet., Lepilemur cf. randrianasoli, Hapalemur cf. griseus ranomafanensis, and Mirza sp. in the Beanka Forest need to be supported by morphological and genetic data. Overall, lemur distribution in the surveyed zone of microendemism only partly supports the centers-of-endemism hypothesis. Given its extraordinarily high lemur diversity, the Beanka Forest deserves more attention from researchers studying lemur ecology and behavior. Current programs of Biodiversity Conservation Madagascar are important for the conservation of this forest area."],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/10024"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.ispartof","The Beanka Forest, Melaky Region, western Madagascar"],["dc.title","Lemurs of the Beanka Forest, Melaky Region, western Madagascar"],["dc.type","book_chapter"],["dc.type.internalPublication","unknown"],["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"]]

[["dc.bibliographiccitation.firstpage","113"],["dc.bibliographiccitation.lastpage","115"],["dc.contributor.author","Markolf, Matthias"],["dc.contributor.author","Kappeler, Peter"],["dc.contributor.author","Lewis, Rebecca"],["dc.contributor.author","Jacky, Ibrahim Antho Youssouf"],["dc.contributor.editor","Schwitzer, C."],["dc.contributor.editor","Mittermeier, R. A."],["dc.contributor.editor","Davies, N."],["dc.contributor.editor","Johnson, S."],["dc.contributor.editor","Ratsimbazafy, J."],["dc.contributor.editor","Razafindramanana, Louis E."],["dc.contributor.editor","Rajoebelina, S."],["dc.date.accessioned","2018-03-28T12:41:24Z"],["dc.date.available","2018-03-28T12:41:24Z"],["dc.date.issued","2013"],["dc.description.abstract","It is undeniable that Madagascar is a very special island for its exceptional wealth of biodiversity, its unique flora and fauna, which make our country one of the world’s foremost nature sanctuaries. Unfortunately, particularly over the last two decades, anthropogenic change has drastically affected Madagascar’s natural treasures. Every year, thousands of hectares of forest disappear due to logging and slash-and-burn agriculture. Most of the endemic fauna of Madagascar is forest-dependent, which means that once the forest becomes degraded or vanishes, the animals also disappear. Many species of endemic Malagasy reptiles, birds and mammals are currently on the verge of extinction due mainly to habitat loss and illegal exploitation. But I am happy to say that there are committed NGOs, institutions and individuals who are aware of the urgent need to set up strategies for environmental protection before it is too late. This is particularly true for these unique creatures, the lemurs, which symbolise the uniqueness of Madagascar’s biodiversity. During the past twenty years, almost every year, new species of these “denizens of the forest” have been discovered because of the fruitful collaboration of Malagasy and foreign primatologists, and there are probably still some hidden treasures in our forests. Almost 20% of the world’s primates are found in Madagascar. The loss of lemurs has implications for the entire country, and without efforts to better safeguard this precious national resource, all of Madagascar’s residents will ultimately suffer. I would like to take this opportunity to thank the Primate Specialist Group of the IUCN SSC for organising the Lemur Red- Listing and Conservation-Planning Workshop in July 2012 in Antananarivo. This meeting of 60 hard-working national and international primatologists agreed on a common strategy for the conservation of lemurs. The wide variety of both conservation and development projects in the different priority sites for lemur conservation is a key feature of this new strategy. Without doubt, using lemurs as “flagships” for public awareness and education campaigns will be crucial to stimulate general interest in conservation within Madagascar and to draw even more international attention to the importance of this country for conserving global biological diversity. In this regard, I do believe that the lemurs will continue to exercise their attractive powers over tourists: seeing lemurs in their natural habitats once in a lifetime is a dream for nature lovers and naturalists around the world. Notably, tourism contributes a substantial amount of foreign exchange to Madagascar’s economy. Conservation is a collective task that demands the involvement of all of us. Implementing this lemur conservation strategy will thus only be successful if we work together to face the challenges ahead. We will not let the lemurs vanish from our forests because we are not alone in our battle. Lemurs are a world heritage for future generations."],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/13188"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.publisher","IUCN SSC Primate Specialist Group, Bristol Conservation and Science Foundation, and Conservation International"],["dc.relation.isbn","978-1-934151-62-4"],["dc.relation.ispartof","Lemurs of Madagascar- A Strategy for their Conservation 2013-2016"],["dc.title","Kirindy- Ambadira (Central Menabe)"],["dc.type","book_chapter"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]