Search Results - "Töpfer, Till"

Functional and phylogenetic diversity and assemblage structure of frugivorous birds along an elevational gradient in the tropical Andes by Dehling, D. Matthias, Fritz, Susanne A., Töpfer, Till, Päckert, Martin, Estler, Patrizia, Böhning-Gaese, Katrin, Schleuning, Matthias

“…Tropical mountains are hotspots of biodiversity, but the factors that generate this high diversity remain poorly understood. To identify possible mechanisms…”
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Occupancy of the Ethiopian endemic Moorland Francolin in pristine and degraded Afroalpine biome using a camera trap approach by Abrha, Abadi Mehari, Gedeon, Kai, Podsiadlowski, Lars, Weldesilasie, Demis Mamo, Töpfer, Till

“…Occupancy modeling is an essential tool for understanding species‐habitat associations, thereby helping to plan the conservation of rare and threatened…”
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Asymmetric allelic introgression across a hybrid zone of the coal tit (Periparus ater) in the central Himalayas by Wolfgramm, Hannes, Martens, Jochen, Töpfer, Till, Vamberger, Melita, Pathak, Abhinaya, Stuckas, Heiko, Päckert, Martin

“…In the Himalayas, a number of secondary contact zones have been described for vicariant vertebrate taxa. However, analyses of genetic divergence and admixture…”
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The Occurrence of Quill Mites (Arachnida: Acariformes: Syringophilidae) on Bee-Eaters (Aves: Coraciiformes: Meropidae: Merops ) of Two Sister Clades by Skoracki, Maciej, Kosicki, Jakub Z, Sikora, Bozena, Töpfer, Till, Hušek, Jan, Unsöld, Markus, Hromada, Martin

“…We studied the quill mite fauna of the family Syringophilidae, associated with bee-eaters. We examined 273 bird specimens belonging to nine closely related…”
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Morphology and morphometry of two hybridizing buntings at their hybrid zone in northern Iran reveal intermediate and transgressive morphotypes by Gholamhosseini, Ali, Aliabadian, Mansour, Töpfer, Till, Sætre, Glenn-Peter

“…The closely related Black-headed Bunting (Emberiza melanocephala, a western Palearctic lineage) and Red-headed Bunting (Emberiza bruniceps, an eastern…”
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Speciation and population divergence in a mutualistic seed dispersing bird by de Raad, Jordi, Päckert, Martin, Irestedt, Martin, Janke, Axel, Kryukov, Alexey P., Martens, Jochen, Red’kin, Yaroslav A., Sun, Yuehua, Töpfer, Till, Schleuning, Matthias, Neuschulz, Eike Lena, Nilsson, Maria A.

“…Bird-mediated seed dispersal is crucial for the regeneration and viability of ecosystems, often resulting in complex mutualistic species networks. Yet, how…”
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A molecular analysis of the mysterious Vaurie’s Nightjar Caprimulgus centralasicus yields fresh insight into its taxonomic status by Schweizer, Manuel, Etzbauer, Claudia, Shirihai, Hadoram, Töpfer, Till, Kirwan, Guy M.

“…One of the last remaining enigmas among Palearctic bird species is Vaurie’s Nightjar Caprimulgus centralasicus . It is known from a single specimen, said to be…”
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The birds (Aves) of Oromia, Ethiopia – an annotated checklist by Gedeon, Kai, Zewedie, Chemere, Töpfer, Till

“…Oromia is the largest National Regional State of Ethiopia. Here we present the first comprehensive checklist of its birds. A total of 804 bird species has been…”
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Direct and plant‐mediated effects of climate on bird diversity in tropical mountains by Vollstädt, Maximilian G. R., Albrecht, Jörg, Böhning‐Gaese, Katrin, Hemp, Andreas, Howell, Kim M., Kettering, Laura, Neu, Alexander, Neuschulz, Eike Lena, Quitián, Marta, Santillán, Vinicio E., Töpfer, Till, Schleuning, Matthias, Fritz, Susanne A.

“…Aim Although patterns of biodiversity across the globe are well studied, there is still a controversial debate about the underlying mechanisms and their…”
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Utility of arsenic-treated bird skins for DNA extraction by Töpfer, Till, Gamauf, Anita, Haring, Elisabeth

“…Natural history museums receive a rapidly growing number of requests for tissue samples from preserved specimens for DNA-based studies. Traditionally, dried…”
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Functional relationships beyond species richness patterns: trait matching in plant–bird mutualisms across scales by Dehling, D. Matthias, Töpfer, Till, Schaefer, H. Martin, Jordano, Pedro, Böhning‐Gaese, Katrin, Schleuning, Matthias

“…AIM: Functional relationships between species groups on macroecological scales have often been inferred from comparisons of species numbers across space. On…”
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Horizontal and elevational phylogeographic patterns of Himalayan and Southeast Asian forest passerines (Aves: Passeriformes) by Päckert, Martin, Martens, Jochen, Sun, Yue-Hua, Severinghaus, Lucia Liu, Nazarenko, Alexander A., Ting, Ji, Töpfer, Till, Tietze, Dieter Thomas

“…Aim: Zoogeographie patterns in the Himalayas and their neighbouring Southeast Asian mountain ranges include elevational parapatry and ecological segregation,…”
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Dynamic occupancy modeling of a cryptic ground-dwelling pheasant species in the Upper Blue Nile Basin in Ethiopia by Abrha, Abadi Mehari, Gedeon, Kai, Podsiadlowski, Lars, Töpfer, Till

“…Modeling the occupancy of species in the context of habitat components is a crucial step to deliver an appropriate conservation strategy. Accounting for…”
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Direct and indirect effects of climate, human disturbance and plant traits on avian functional diversity by Vollstädt, Maximilian G. R., Ferger, Stefan W., Hemp, Andreas, Howell, Kim M., Töpfer, Till, Böhning-Gaese, Katrin, Schleuning, Matthias

“…Aim: Climate change and an increase in human disturbance are major drivers of global biodiversity loss. Yet it is not clear to what extent their effects on…”
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Genetic Diversity of the Ankober Serin (Crithagra ankoberensis) at Simien Mountains National Park and Guassa Community Conservation Area, Ethiopia by Dessalegn, Abebayehu, Balakrishnan, Mundanthra, Töpfer, Till, Podsiadlowski, Lars, Wube, Tilaye

“…The genetic diversity of the Ethiopian endemic Ankober Serin Crithagra ankoberensis was studied in two populations at Simien Mountains National Park and Guassa…”
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Functional importance of avian seed dispersers changes in response to human-induced forest edges in tropical seed-dispersal networks by Saavedra, Francisco, Hensen, Isabell, Beck, Stephan G., Böhning-Gaese, Katrin, Lippok, Denis, Töpfer, Till, Schleuning, Matthias

“…Although seed-dispersal networks are increasingly used to infer the functioning of ecosystems, few studies have investigated the link between the properties of…”
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Constant properties of plant-frugivore networks despite fluctuations in fruit and bird communities in space and time by Plein, Michaela, Längsfeld, Laura, Neuschulz, Eike Lena, Schultheiß, Christina, Ingmann, Lili, Töpfer, Till, Böhning-Gaese, Katrin, Schleuning, Matthias

“…Human-induced changes in anthropogenic landscapes are a predominant threat to biodiversity and have been documented to affect mutualistic interactions between…”
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Isotope record tracks changes in historical wintering ranges of a passerine in sub‐Saharan Africa by Milano, Stefania, Frahnert, Sylke, Hallau, André, Töpfer, Till, Woog, Friederike, Voigt, Christian Claus

“…Billions of birds migrate from the Palaearctic to sub‐Saharan Africa, yet we are unaware about where exactly they stay over winter and how consistent they have…”
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Revising the phylogenetic position of the extinct Mascarene Parrot Mascarinus mascarin (Linnaeus 1771) (Aves: Psittaciformes: Psittacidae) by Podsiadlowski, Lars, Gamauf, Anita, Töpfer, Till

“…[Display omitted] •Cytb was sequenced from one of only two museum specimens of the extinct Mascarin parrot.•A formerly published sequence from this species is…”
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Functional and phylogenetic diversity of bird assemblages are filtered by different biotic factors on tropical mountains by Hanz, Dagmar M., Böhning‐Gaese, Katrin, Ferger, Stefan W., Fritz, Susanne A., Neuschulz, Eike Lena, Quitián, Marta, Santillán, Vinicio, Töpfer, Till, Schleuning, Matthias

“…Aim It is not yet clear whether similar mechanisms influence the assembly of ecological communities across different continents. Here, we investigated the…”
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