Center for Computational and Theoretical Biology

Molecular Biodiversity (moved to LMU)

Molecular Biodiversity Research

We recently moved to the LMU in München!
Until we have a new homepage there, please check the lab website here: https://www.molecular.eco

Our research projects focus on a combination of field ecology with bioinformatics and new sequencing technologies. Conceptually, we are interested in patterns and structuring forces of communities, where organisms are not easily identifiable or distinguishable from each other. This interest applies to various levels, starting with abundance and diversity of taxa, over phylogenetic reconstructions, towards environmental and spatial influences and lastly regarding organisms' molecular interactions with each other on a genomic level. Methodologically, the workgroup is developing computational workflows and databases as well as laboratory protocols to analyse ecological samples with next-generation sequencing technologies. 

Biologically, the focus of current projects is the dynamics of bacteria-host associations in changing environments. Regarding this, we currently consider changes in microbiota induced by 

  • symbiotic host-host interactions,
  • the host's development,
  • geographic intra-specific variability,
  • climatic changes,
  • prey capturing,
  • as well as general variation between tissues and species of hosts. 

To answer these questions, we conduct field work, analyse samples in our molecular laboratory and apply computational approaches. We have successfully developed methods to simultaneously assess biodiversity of bacteria and plants (here: mixed pollen samples) through next-generation sequencing allowing a very fine scaled interpretation of plant-bee-microbe interactions. Usually we start with descriptive studies, investigating the status-quo, which are followed by experimental designs manipulating the associations by (e.g. antibiotic) exclusion and bioassays. Lastly, for prospective bacteria with interesting distributions and activity, we are also engaged into genomics, studying the genetic possibilities that bacteria bring into the associations with their respective hosts.

  • The Plant-Pollinator-Microbe Triangle

    Despite the major ecological and agricultural importance of plant-pollinator associations, the microbiota of the anthosphere and of wild pollinators are not well understood. I started to work on this line of research during the final phase of my doctoral studies with first floral microbiome assessments, and now supplement this as a young investigator groupleader with the bee-microbiota association perspective. I adress fundamental questions about diversity and community structure, but also aim to understand the ecological functions and the molecular mechanisms.

  • Carnivorous Plants: Co-Evolution of Traps and Microbiota

    Carnivorous plants are marvelous research objects and have been studied for over a century. In most cases they grow in nutrient-depleted, acidic soils with centres of diversity in the tropics. They derive nutrients usually from arthropod prey, which they catch and digest with adapted morphological capturing-structures, and likely with microbial help. Surprisingly little is however known about such associations with microorganisms.

  • Eco-Evo Molecular Tool Development

    Biodiversity research on a molecular level has reached a new height with the advent of affordable sequencing methods, especially with next-generation devices. Sequencing data provides information about the evolutionary history, allows identification of all organisms within a community through meta-barcoding and uncovers not only species but also genetic diversity through genomics. Furthermore, such data is of high taxonomic resolution, independent of previous knowledge of taxa, well-comparable between workgroups, long-term achievable and re-usable in meta-analyses. Yet, currently molecular and bioinformatic tools are missing to generate and process such data in the ecological context. We thus engage into the method development of tool in this area.


2023[ to top ]
  • Ten (mostly) simple rules to future-proof trait data in ecological and evolutionary sciences Keller, Alexander; Ankenbrand, Markus J.; Bruelheide, Helge; Dekeyzer, Stefanie; Enquist, Brian J.; Erfanian, Mohammad Bagher; Falster, Daniel S.; Gallagher, Rachael V.; Hammock, Jennifer; Kattge, Jens; Leonhardt, Sara D.; Madin, Joshua S.; Maitner, Brian; Neyret, Margot; Onstein, Renske E.; Pearse, William D.; Poelen, Jorrit H.; Salguero-Gomez, Roberto; Schneider, Florian D.; Tóth, Anikó B.; Penone, Caterina in Methods in Ecology and Evolution, (K. Bacon, red.) (2023). 14(2) 444–458.
  • Inter- and intraspecific phytochemical variation correlate with epiphytic flower and leaf bacterial communities Gaube, Paul; Marchenko, Polina; Müller, Caroline; Schweiger, Rabea; Tenhaken, Raimund; Keller, Alexander; Junker, Robert R. in Environmental Microbiology (2023).
2022[ to top ]
  • Wild bee larval food composition in five European cities Casanelles Abella, Joan; Keller, Alexander; Müller, Stefanie; Aleixo, Cristiana; Alós Orti, Marta; {Chiron, François andand Laanisto}; Pinho, Pedro; Samson, Roeland; Tryjanowski, Piotr; Van Mensel, Anskje; Villarroya-Villalba, Lucia; Pellissier, Loic; Moretti, Marco in Ecology (2022). in press.
  • Pollinator-flower interactions in gardens during the COVID-19 pandemic lockdown of 2020 Ollerton, Jeff; Trunschke, Judith; Havens, Kayri; Landaverde-González, Patricia; Keller, Alexander; Gilpin, Amy-Marie; Rech, André Rodrigo; Baronio, Gudryan J.; Phillips, Ben; Mackin, Chris; Stanley, Dara A.; Treanore, Erin; Baker, Ellen; Rotheray, Ellen L.; Erickson, Emily; Fornoff, Felix; Brearley, Francis Q.; Ballantyne, Gavin; Iossa, Graziella; Stone, Graham N.; Bartomeus, Ignasi; Stockan, Jenni A.; Leguizamón, Johana; Prendergast, Kit; Rowley, Lisa; Giovanetti, Manuela; de Oliveira Bueno, Raquel; Wesselingh, Renate A.; Mallinger, Rachel; Edmondson, Sally; Howard, Scarlett R.; Leonhardt, Sara D.; Rojas-Nossa, Sandra V.; Brett, Maisie; Joaqui, Tatiana; Antoniazzi, Reuber; Burton, Victoria J.; Feng, Hui-Hui; Tian, Zhi-Xi; Xu, Qi; Zhang, Chuan; Shi, Chang-Li; Huang, Shuang-Quan; Cole, Lorna J.; Bendifallah, Leila; Ellis, Emilie E.; Hegland, Stein Joar; Díaz, Sara Straffon; Lander, Tonya; Mayr, Antonia V.; Katzer, Sophie; Dawson, Richard; Eeraerts, Maxime; Armbruster, W. Scott; Walton, Becky; Adjlane, Noureddine; Falk, Steven; Mata, Luis; Geiger, Anya Goncalves; Carvell, Claire; Wallace, Claire; Ratto, Fabrizia; Barberis, Marta; Kahane, Fay; Connop, Stuart; Stip, Anthonie; Sigrist, Maria Rosangela; Vereecken, Nicolas J.; Klein, Alexandra-Maria; Baldock, Katherine C.R.; Arnold, Sarah E. J. in Journal of Pollination Ecology (2022). in press.
  • Plants, pollinators and their interactions under global ecological change: The role of pollen DNA metabarcoding Bell, Karen L.; Turo, Katherine J.; Lowe, Abigail; Nota, Kevin; Keller, Alexander; Encinas-Viso, Francisco; Parducci, Laura; Richardson, Rodney T.; Leggett, Richard M.; Brosi, Berry J.; Burgess, Kevin S.; Suyama, Yoshihisa; de Vere, Natasha in Molecular Ecology (2022). n/a(n/a)
  • Phylogenetic relatedness of food plants reveals highest insect herbivore specialisation at intermediate temperatures along a broad climatic gradient König, Sebastian; Krauss, Jochen; Keller, Alexander; Bofinger, Lukas; Steffan-Dewenter, Ingolf in Global Change Biology (2022). in press.
  • Forest landscapes increase diversity of honeybee diets in the tropics Cannizzaro, Chris; Keller, Alexander; Wilson, Rachele S.; Elliott, Brittany; Newis, Ryan; Ovah, Raywin; Inae, Kelly; Kerlin, Douglas H.; Bar, Ido; Kämper, Wiebke; Shapcott, Alison; Wallace, Helen M. in Forest Ecology and Management (2022). in press.
  • Do amino and fatty acid profiles of pollen provisions correlate with bacterial microbiomes in the mason bee Osmia bicornis? Leonhardt, Sara D.; Peters, Birte; Keller, Alexander in Philosophical Transactions of the Royal Society B (2022). in press.
  • Diets maintained in a changing world: Does land-use intensification alter wild bee communities by selecting for flexible generalists? Peters, Birte; Keller, Alexander; Leonhardt, Sara D. in Ecology and Evolution (2022). in press.
  • Decreased efficiency of pollen collection due to Sulfoxaflor exposure leads to a reduction in the size of bumble bee workers in late European summer Boff, Samuel; Keller, Alexander; Raizer, Josué; Lupi, Daniela in Frontiers in Ecology and Evolution (2022). 10
  • Critical links between biodiversity, nutrition and health in wild bee conservation Parreno, M.A.; Alaux, C.; Brunet, J.-L.; Butschkau, S.; Buydens, L.; Filipiak, M.; Henry, M.; Keller, Alexander; Klein, A.-M.; Kuhlmann, M; Leroy, C.; Meeus, I; Palmer-Young, E; Piot, N.; Requier, F.; Ruedenauer, F.; Smagghe, G.; Stevenson, P.C; Leonhardt, S.D. in Trends in Ecology and Evolution (2022). in press.
2021[ to top ]
  • Transmission of Bacterial Symbionts With and Without Genome Erosion Between a Beetle Host and the Plant Environment Wierz, Jürgen C.; Gaube, Paul; Klebsch, Dagmar; Kaltenpoth, Martin; Flórez, Laura V. in Frontiers in Microbiology (2021). 12
  • Standard methods for pollen research Campos, Maria G.; Anjos, Ofélia; Chica, Manuel; Campoy, Pascual; Nozkova, Janka; Almaraz-Abarca, Norma; Barreto, Lidia M. R. C.; Nordi, João Carlos; Estevinho, Leticia M.; Pascoal, Ananias; Paula, Vanessa Branco; Chopina, Altino; Dias, Luis G.; j. Tešić, Živoslav L.; Mosić, Mirjana D.; Kostić, Aleksandar Ž.; Pešić, Mirjana B.; Milojković-Opsenica, Dušanka M.; Sickel, Wiebke; Ankenbrand, Markus J.; Grimmer, Gudrun; Steffan-Dewenter, Ingolf; Keller, Alexander; Förster, Frank; Tananaki, Chrysoula H.; Liolios, Vasilios; Kanelis, Dimitrios; Rodopoulou, Maria-Anna; Thrasyvoulou, Andreas; Paulo, Luísa; Kast, Christina; Lucchetti, Matteo A.; Glauser, Gaëtan; Lokutova, Olena; de Almeida-Muradian, Ligia Bicudo; Szczęsna, Teresa; Carreck, Norman L. in Journal of Apicultural Research (2021). 60(4) 1–109.
  • Species richness is more important for ecosystem functioning than species turnover along an elevational gradient Albrecht, Joerg; Peters, Marcell K.; Classen, Alice; Becker, Joscha N.; Behler, Christina; Ensslin, Andreas; Ferger, Stefan W.; Gebert, Friederike; Helbig-Bonitz, Maria; Kindeketa, William J.; Mayr, Antonia V.; {Njovu, Henry K. Pabst}; Pommer, Ulf; Röder, Juliane; Rutten, Gemma; Schellenberger Costa, David; Sierra-Cornejo, Natalia; Vogeler, Anna; Vollstädt, Maximilian G. R.; Dulle, Hamadi I.; Eardley, Connal D.; Howell, Kim M.; Keller, Alexander; Peters, Ralph S.; Kakengi, Victor; Hemp, Claudia; Zhang, Jie; Manning, Peter; Müller, Thomas; Böhning-Gaese, Katrin; Brandl, Roland; Hertel, Dietrich; Kiese, Ralf; Kleyer, Michael; Kuzyakov, Yakov; Nauss, Thomas; Tschapka, Marco; Fischer, Markus; Hemp, Andreas; Steffan-Dewenter, Ingolf; Schleuning, Matthias in Nature Ecology and Evolution (2021). in press.
  • Putative roles of bacteria in the carbon and nitrogen cycles in a tropical peat swamp forest Too, Chin Chin; Ong, Kuan Shion; Lee, Sui Mae; Yule, Catherine M.; Keller, Alexander in Basic and Applied Ecology (2021). Special issue: Predictors of microbiomes
  • Preservation methods of honey-bee collected pollen are not a source of bias in ITS2 metabarcoding Quaresma, Andreia; Brodschneider, Robert; Gratzer, Kristina; Gray, Alison; Keller, Alexander; Kilpinen, Ole; Rufino, Jose; van der Steen, Jozef; Vejsnaes, Flemming; Pinto, Maria Alice in Environmental Monitoring and Assessment (2021). in press.
  • Pollen diets and niche overlap of honey bees and native bees in protected areas Elliott, Brittany; Wilson, Rachele; Shapcott, Alison; Keller, Alexander; Newis, Ryan; Cannizzaro, Chris; Burwell, Chris; Smith, Tobias; Leonhardt, Sara D.; Kämper, Wiebke; Wallace, Helen in Basic and Applied Ecology (2021). Special issue: Sequence based molecular ecology
  • Osmotic adaptation and compatible solute biosynthesis of phototrophic bacteria as revealed from genome analyses Imhoff, Johannes F.; Rahn, Tanja; Künzel, Sven; Keller, Alexander; Neulinger, Sven C. in Microorganisms (2021). 9(1) 46.
  • Open Science principles for accelerating trait-based science across the Tree of Life Gallagher, Rachael; Falster, Daniel S.; Maitner, Brian; Enquist, Brian; Ankenbrand, Markus; Balk, Meghan; Bland, Lucie; Boyle, Brad; Bravo, Catherine; Cavazos, Brittany; Fadrique, Belen; Feng, Xiao; Halbritter, Aud; Hammock, Jennifer; Hogan, James Aaron; Iversen, Colleen; Jochum, Malte; Kattge, Jens; Keller, Alexander; Madin, Joshua; Manning, Peter; McCormack, Luke; Michaletz, Sean; Park, Daniel; Pearse, William; Penone, Caterina; Perez, Timothy; Pineda-Munoz, Silvia; Poelen, Joritt; Ray, Courtenay; Salguero-Gomez, Roberto; Sauquet, Herve; Schneider, Florian; Spasojevic, Marko J.; Vandvik, Vigdis; Violle, Cyrille; Weiss, Katherine in Nature Ecology & Evolution (2021). 294–303.
  • Many small rather than few large sources identified in long-term bee pollen diets in agroecosystems Wilson, Rachele; Keller, Alexander; Shapcott, Alison; Leonhardt, Sara D.; Sickel, Wiebke; Hardwick, J. L.; Heard, Tim; Kaluza, Benjamin F; and Wallace, Helen in Agriculture, Ecosystems and Environment (2021).
  • Inferring core genome phylogenies for bacteria Keller, Alexander; Ankenbrand, Markus J in Bacterial Pangenomics (in press), A. Mengoni, M. Fondi, G. Bacci (reds.) (2021).
  • How bees find a way in European cities: pollen metabarcoding unravels multiple feeding strategies and their effects on distribution patterns in four wild bee species Casanelles Abella, Joan; Müller, Stefanie; Keller, Alexander; Aleixo, Cristiana; Alós Orti, Marta; Chiron, François; Deguines, Nicolas; Hallikma, Tiit; Laanisto, Lauri; Pinho, Pedro; Samson, Roeland; Tryjanowski, Piotr; Van Mensel, Anskje; Pellissier, Loïc; Moretti, Marco in Journal of Applied Ecology (2021). in press.
  • Functional resin use in solitary bees Chui, Shao Xiong; Keller, Alexander; Leonhardt, Sara in Ecological Entomology (2021). in press.
  • Effects of three flower field types on bumblebees and their pollen diets Piko, Julia; Keller, Alexander; Geppert, Costanza; Batáry, Péter; Tscharntke, Teja; Westphal, Catrin; Hass, Annika L. in Basic and Applied Ecology (2021). 52 95–108.
  • DNA sequence-based biodiversity and interaction ecology Tiede, Julia; Keller, Alexander; Eitzinger, Bernhard in Basic and Applied Ecology (2021).
  • Cryptic species and hidden ecological interactions of halictine bees along an elevational gradient Mayr, Antonia V.; Keller, Alexander; Peters, Marcell K.; Grimmer, Gudrun; Krischke, Beate; Geyer, Mareen; Schmitt, Thomas; Steffan-Dewenter, Ingolf in Ecology and Evolution (2021).
  • Changes amid constancy: flower and leaf microbiomes along land use gradients and between bioregions Gaube, Paul; Junker, Robert R.; Keller, Alexander in Basic and Applied Ecology (2021). 50 1–15.
  • An integrative environmental pollen diversity assessment and its importance for the Sustainable Development Goals Hornick, Thomas; Bastl, M; Bohlmann, S; Bonn, A; Bumberger, J; Dietrich, P; Gemeinholzer, B.; Grote, R; Harpole, W. S.; Heinold, B; Keller, Alexander; Luttkus, M. L.; Mäder, P.; Motivans, E.; Passonneau, S.; Punyasena, S.W.; Rakosy, Demetra; Richter, A.; Richter, R.; Sickel, W.; Steffan-Dewenter, I.; Theodorou, P.; Treudler, R.; Werchan, B.; Werchan, M.; Wolke, R.; Dunker, S. in Plants, People, Planet (2021). in press.
  • (More than) Hitchhikers through the network: The shared microbiome of bees and flowers Keller, Alexander; McFrederick, Quinn S.; Dharampal, Prarthana; Steffan, Shawn; Danforth, Bryan N.; Leonhardt, Sara D. in Current Opinion in Insect Science (2021).
2020[ to top ]
  • Tracking beekeepers in floristic regions of Iran: employing DNA metabarcoding to determine the geographical origin of honey Khansaritoreh, Elmira; Salamaki, Y; Ramezani, E; Akbari-Azirani, T; Keller, Alexander; Neumann, Katrin; Alizadeh, K; Zarre, S; Beckh, G; Behling, H in Heliyon (2020).
  • The genus Micromonospora as a model microorganism for bioactive natural product discovery Hifnawy, Mohamed S.; Fouda, Mohamed M.; Sayed, Ahmed M.; Mohammed, Rabab; Hassan, Hossam M.; AbouZid, Sameh F.; Rateb, Mostafa E.; Keller, Alexander; Adamek, Martina; Ziemert, Nadine; Abdelmohsen, Usama Ramadan in Royal Society of Chemistry Advances (2020). 10(35) 20939–20959.
  • Susceptibility of red mason bee larvae to bacterial threats due to microbiome exchange with imported pollen provisions Voulgari-Kokota, Anna; Steffan-Dewenter, Ingolf; Keller, Alexander in Insects (2020). 11(6)
  • Strong phylogenetic constraint on transition metal incorporation in the mandibles of the hyper-diverse Hymenoptera (Insecta) Polidori, Carlo; Jorge, Alberto; Keller, Alexander; Ornosa, Concepcion; Tormos, Jose; Asis, Josep Daniel; Nieves-Aldrey, Jose Luis in Organisms, Diversity and Evolution (2020). in press.
  • Introduced bees (Osmia cornifrons) collect pollen from both coevolved and novel host-plant species within their family-level phylogenetic preferences Vaudo, Anthony D.; Biddinger, David J.; Sickel, Wiebke; Keller, Alexander; López-Uribe, Margarita M. in Royal Society Open Science (2020). in press.
  • Floral Species Richness Correlates with Changes in the Nutritional Quality of Larval Diets in a Stingless Bee Trinkl, Moritz; Kaluza, Benjamin F.; Wallace, Helen; Heard, Tim A.; Keller, A.; Leonhardt, Sara D. in Insects (2020). 11(2)
  • CRISPR/Cas 9 mediated mutations as a new tool for studying taste in honeybees Degirmenci, Laura; Geiger, Dietmar; Rogé Ferreira, Fábio Luiz; Keller, Alexander; Krischke, Beate; Beye, Martin; Steffan-Dewenter, Ingolf; Scheiner, Ricarda in Chemical Senses (2020). bjaa063.
  • BCdatabaser: on-the-fly reference database creation for DNA (meta-)barcoding Keller, Alexander; Hohlfeld, Sonja; Kolter, Andreas; Schultz, Jörg; Gemeinholzer, Birgit; Ankenbrand, Markus J. in Bioinformatics (2020). in press.
2019[ to top ]
  • Venus flytrap microbiota withstand harsh conditions during prey digestion Sickel, Wiebke; Van der Weyer, Anna-Lena; Bemm, Felix; Schultz, Jörg; Keller, Alexander in FEMS Microbiology Ecology (2019). fiz010.
  • Linking the foraging patterns of megachilid bee species to nest bacteria Voulgari-Kokota, Anna; Ankenbrand, Markus; Grimmer, Gudrun; Steffan-Dewenter, Ingolf; Keller, Alexander in Ecology and Evolution (2019). in press.
  • Honey bee waggle dance communication increases diversity of pollen diets in intensively managed agricultural landscapes Nürnberger, Fabian; Keller, Alexander; Härtel, Stephan; Steffan-Dewenter, Ingolf in Molecular Ecology (2019). in press.
  • Drivers, diversity and functions of solitary bee microbiota Voulgari-Kokota, Anna; McFrederick, Quinn; Steffan-Dewenter, Ingolf; Keller, Alexander in Trends in Microbiology (2019). in press.
  • Cold-adaptation of Subtercola vilae DB165T, an isolate from a high-altitude cold volcano lake, as revealed by its genome analysis Villalobos, Alvaro S; Wiese, Jutta; Imhoff, Johannes F; Dorador, Cristina; Keller, Alexander; Hentschel, Ute (2019).
  • Climate–land-use interactions shape tropical mountain biodiversity and ecosystem functions Peters, Marcell K.; Hemp, Andreas; Appelhans, Tim; Becker, Joscha N.; Behler, Christina; Classen, Alice; Detsch, Florian; Ensslin, Andreas; Ferger, Stefan W.; Frederiksen, Sara B.; Gebert, Friederike; Gerschlauer, Friederike; Gütlein, Adrian; Helbig-Bonitz, Maria; Hemp, Claudia; Kindeketa, William J.; Kühnel, Anna; Mayr, Antonia V.; Mwangomo, Ephraim; Ngereza, Christine; Njovu, Henry K.; Otte, Insa; Pabst, Holger; Renner, Marion; Röder, Juliane; Rutten, Gemma; Schellenberger Costa, David; Sierra-Cornejo, Natalia; Vollstädt, Maximilian G. R.; Dulle, Hamadi I.; Eardley, Connal D.; Howell, Kim M.; Keller, Alexander; Peters, Ralph S.; Ssymank, Axel; Kakengi, Victor; Zhang, Jie; Bogner, Christina; Böhning-Gaese, Katrin; Brandl, Roland; Hertel, Dietrich; Huwe, Bernd; Kiese, Ralf; Kleyer, Michael; Kuzyakov, Yakov; Nauss, Thomas; Schleuning, Matthias; Tschapka, Marco; Fischer, Markus; Steffan-Dewenter, Ingolf in Nature (2019).
  • Bacterial community structure and succession in nests of two megachilid bee genera Voulgari-Kokota, Anna; Grimmer, Gudrun; Steffan-Dewenter, Ingolf; Keller, Alexander in FEMS Microbiology Ecology (2019). 95(1) fiy218.
2018[ to top ]
  • Wild bees and their nests host Paenibacillus bacteria with functional potential of avail Keller, Alexander; Brandel, Annette; Becker, Mira C.; Balles, Rebecca; Abdelmohlsen, Usama R.; Ankenbrand, Markus J.; Sickel, Wiebke in Microbiome (2018). (6) 229.
  • The characterization of the circadian clock in the olive fly Bactrocera oleae (Diptera: Tephritidae) reveals a Drosophila-like organization Bertolini, Enrico; Kistenpfennig, Christa; Menegazzi, Pamela; Keller, Alexander; Koukidou, Martha; Helfrich-F{"o}rster, Charlotte in Scientific Reports (2018). 8(1) 816.
  • Physical contact between mesenchymal stem cells and endothelial precursors induces distinct signatures with relevance to the very early phase of regeneration Hafen, Bettina; Wiesner, Susanne; Schlegelmilch, Katrin; Keller, Alexander; Seefried, Lothar; Ebert, Regina; Walles, Heike; Jakob, Franz; Schütze, Norbert in Journal of Cellular Biochemistry (2018).
  • Microbial community structure in a Malaysian tropical peat swamp forest: the influence of tree species and depth Too, Chin Chin; Keller, Alexander; Sickel, Wiebke; Lee, Sui Mae; Yule, Catherine M. in Frontiers in Microbiology (2018). 9 2859.
  • FENNEC - Functional Exploration of Natural Networks and Ecological Communities Ankenbrand, Markus J.; Hohlfeld, Sonja C. Y.; Foerster, Frank; Keller, Alexander in Methods in Ecology and Evolution (2018). 2028–2033.
  • Draft Genome Sequence of Paraburkholderia sp. Strain C35, Isolated from a Malaysian Tropical Peat Swamp Forest Too, Chin Chin; Ong, Kuan Shion; Ankenbrand, Markus J.; Lee, Sui Mae; Yule, Catherine M.; Keller, Alexander in Genome Announcements (2018). 6(25)
  • Draft Genome Sequence of Klebsiella sp. Strain C31 Isolated from a Malaysian Tropical Peat Swamp Forest Too, Chin Chin; Ong, Kuan Shion; Ankenbrand, Markus J; Lee, Sui Mae; Yule, Catherine M; Keller, Alexander in Genome announcements (2018). 6(25) e00560–18.
  • Draft Genome Sequence of Dyella sp. Strain C9, Isolated from a Malaysian Tropical Peat Swamp Forest Too, Chin Chin; Ong, Kuan Shion; Lee, Sui Mae; Yule, Catherine M; Keller, Alexander in Microbiol Res Announc (2018). 7(12) e01083–18.
  • Draft Genome Sequence of Dyella sp. Strain C11, Isolated from a Malaysian Tropical Peat Swamp Forest Too, Chin Chin; Ong, Kuan Shion; Lee, Sui Mae; Yule, Catherine M; Keller, Alexander in Genome announcements (2018). 6(25) e00459–18.
2017[ to top ]
  • Release from prey preservation behavior via prey switch allowed diversification of cuticular hydrocarbon profiles in digger wasps Wurdack, Mareike; Polidori, Carlo; Keller, Alexander; Feldhaar, Heike; Schmitt, Thomas in Evolution (2017). in press
  • Honey bee foraging ecology: Season but not landscape diversity shapes the amount and diversity of collected pollen Danner, Nadja; Keller, Alexander; H{"a}rtel, Stephan; Steffan-Dewenter, Ingolf in PloS one (2017). 12(8) e0183716.
  • Honey bee foraging ecology: Season but not landscape diversity shapes the amount and diversity of collected pollen Danner, Nadja; Keller, Alexander; Härtel, Stephan; Steffan-Dewenter, Ingolf in PLoS one (2017). in press
  • Generalist social bees maximize diversity intake in plant species-rich and resource-abundant environments Kaluza, Benjamin F.; Wallace, Helen; Keller, Alexander; Heard, Tim A.; Jeffers, Bradley; Drescher, Nora; Blüthgen, Nico; Leonhardt, Sara D. in Ecosphere (2017). 8(3) e01758-n/a.
  • AliTV - interactive visualization of whole genome comparisons. Ankenbrand, Markus J.; Hohlfeld, Sonja; Hackl, Thomas; Förster, Frank in PeerJ Comput. Sci. (2017). 3 e116.
2016[ to top ]
  • TBro: visualization and management of de novo transcriptomes. Ankenbrand, Markus J.; Weber, Lorenz; Becker, Dirk; Förster, Frank; Bemm, Felix in Database (2016). 2016
  • Silent listeners: Can preferences of eavesdropping midges predict the parasitism risk of their host? Meuche, Ivonne; Keller, Alexander; Ahmadsah, Hanyrol; Ahmad, Norhayati; Grafe, T Ulmar in Behavioral Ecology (2016). 27 995–1003.
  • Pollen DNA barcoding: current applications and future prospects Bell, Karen; De Vere, Natasha; Keller, Alexander; Richardson, Rodney; Gous, Annemarie; Burgess, Kevin; Brosi, Berry in Genome (2016). 59 629–640.
  • Laboratory rearing of solitary bees and wasps Becker, Mira; Keller, Alexander in Insect Science (2016). 23 918.
  • Draft genome of the Arabidopsis thaliana phyllosphere bacterium, Williamsia sp. ARP1 Horn, Hannes; Keller, Alexander; Hildebrandt, Ulrich; Kämpfer, Peter; Riederer, Markus; Hentschel, Ute in Standards in Genomic Sciences (2016).
  • DNA-Metabarcoding – ein neuer Blick auf organismische Diversität Keller, Alexander; Grimmer, Gudrun; Sickel, Wiebke; Ankenbrand, Markus J in BioSpektrum (2016). 22 147–150.
  • Crown galls of grapevine (Vitis vinifera) host distinct microbiota Faist, Hanna; Keller, Alexander; Hentschel, Ute; Deeken, Rosalia in Applied and Environmental Microbiology (2016). 82 5542–5552.
  • Contact of myeloma cells induces a characteristic transcriptome signature in skeletal precursor cells--Implications for myeloma bone disease Dotterweich, Julia; Schlegelmilch, Katrin; Keller, Alexander; Geyer, Beate; Schneider, Doris; Zeck, Sabine; Tower, Robert JJ; Ebert, Regina; Jakob, Franz; Sch{"u}tze, Norbert in Bone (2016). 93 155–166.
  • biojs-io-biom, a {BioJS} component for handling data in Biological Observation Matrix ({BIOM}) format Ankenbrand, Markus J.; Terhoeven, Niklas; Hohlfeld, Sonja; Förster, Frank; Keller, Alexander in F1000Research (2016). 5 2348.
  • bcgTree: automatized phylogenetic tree building from bacterial core genomes Ankenbrand, Markus J; Keller, Alexander in Genome (2016). 59 783–791.
  • Bacterial Diversity and Community Structure in Two Bornean Nepenthes Species with Differences in Nitrogen Acquisition Strategies Sickel, Wiebke; Grafe, T. Ulmar; Meuche, Ivonne; Steffan-Dewenter, Ingolf; Keller, Alexander in Microbial Ecology (2016). 71 938–953.
2015[ to top ]
  • Reptiles as reservoirs of bacterial infections: real threat or methodological bias? Zancolli, Giulia; Mahsberg, Dieter; Sickel, Wiebke; Keller, Alexander in Microbial Ecology (2015). 70(3) 579–84.
  • Monophyletic clades of Macaranga pollinating thrips with high specificity to host plant taxonomic sections Fiala, Brigitte; Wells, Konstans; Haubenreisser, Julia; Pittroff, Andreas; Kaya-Zeeb, Sinan; Chung, Arthur Y.C.; bin Hashim, Rosli; Keller, Alexander in Biological Journal of the Linnean Society (2015). 116(3) 558–570.
  • Microhabitat heterogeneity across leaves and flower organs promotes bacterial diversity Junker, Robert R; Keller, Alexander in FEMS Microbiology Ecology (2015). 91(1) fiv09.
  • ITS2 Database V: Twice as Much Ankenbrand, Markus J.; Keller, Alexander; Wolf, Matthias; Schultz, Jörg; Förster, Frank in Molecular Biology and Evolution (2015). 32(11) 3030–3032.
  • Increased efficiency in identifying mixed pollen samples by meta-barcoding with a dual-indexing approach Sickel, Wiebke; Ankenbrand, Markus; Grimmer, Gudrun; Holzschuh, Andrea; Härtel, Stephan; Lanzen, Jonathan; Steffan-Dewenter, Ingolf; Keller, Alexander in BMC Ecology (2015). 15 20.
  • Functional and phylogenetic diversities of plant communities differently affect the structure of flower-visitor interactions and reveal convergences in floral traits Junker, Robert R.; Blüthgen, Nico; Keller, Alexander in Evolutionary Ecology (2015). 29 437–450.
  • Evaluating multiplexed next-generation sequencing as a method in palynology for mixed pollen samples Keller, Alexander; Danner, Nadja; Grimmer, Gudrun; Ankenbrand, Markus; {von der Ohe}, Katharina; {von der Ohe}, Werner; Rost, Simone; Härtel, Stephan; Steffan-Dewenter, Ingolf in Plant Biology (2015). 17 558–566.
  • DNA-analyses of Venerupis philippinarum (Adams and Reeve, 1850) with a new and constant shell-pattern from Italy, Emilia Romagna Wölfling, Mirko; Rohrhirsch, Manuela; Uhl, Britta; Keller, Alexander in Malacologia (2015). 86(1) 30–32.
2014[ to top ]
  • Pollen DNA barcoding using next-generation sequencing Keller, Alexander; Härtel, Stephan; Steffan-Dewenter, Ingolf in Barcode Bulletin (2014). 5(3) 8.
  • Novel form of X-linked nonsyndromic hearing loss with cochlear malformation caused by a mutation in the type IV collagen gene COL4A6 Rost, Simone; Bach, Elisa; Neuner, Cordula; Nanda, Indrajit; Dysek, Sandra; Bittner, Reginald E; Keller, Alexander; Bartsch, Oliver; Mlynski, Robert; Haaf, Thomas in European Journal of Human Genetics (2014). (22) 208–215.
  • Identification of WISP1 as an important survival factor in human mesenchymal stem cells Schlegelmilch, Katrin; Keller, Alexander; Zehe, Viola; Hondke, Silvia; Klein-Hitpass, Ludger; Schütze, Norbert in Gene (2014). 551(2) 243–54.
  • Density-dependent responses by bumblebees to flower dwelling bacteria Junker, Robert R; Romeike, Tanja; Keller, Alexander; Langen, Daniela in Apidologie (2014). 45 467–477.
  • Confirmation of warfarin resistance of naturally occurring VKORC1 variants by coexpression with coagulation factor IX and in silico protein modelling M{"u}ller, Elisabeth; Keller, Alexander; Fregin, Andreas; M{"u}ller, Clemens R; Rost, Simone in BMC Genetics (2014). 15 17.
2013[ to top ]
  • Only distance matters--non-choosy females in a poison frog population Meuche, Ivonne; Brusa, Oscar; Linsenmair, K Eduard; Keller, Alexander; Pr{"o}hl, Heike in Frontiers in Zoology (2013). 10(1) 29.
  • Diverse microbiota identified in whole intact nest chambers of the red mason bee Osmia bicornis (Linnaeus 1758) Keller, Alexander; Grimmer, Gudrun; Steffan-Dewenter, Ingolf in PloS one (2013). 8(10) e78296.
2012[ to top ]
  • Common ancestry or environmental trait filters: cross-continental comparisons of trait--habitat relationships in tropical anuran amphibian assemblages Ernst, Raffael; Keller, Alexander; Landburg, Gwendolyn; Grafe, T Ulmar; Linsenmair, K Eduard; R{"o}del, Mark-Oliver; Dziock, Frank in Global Ecology and Biogeography (2012). 21(7) 704–715.
2011[ to top ]
  • Internal transcribed spacer 2 (nu ITS2 rRNA) sequence-structure phylogenetics: towards an automated reconstruction of the green algal tree of life Buchheim, Mark A; Keller, Alexander; Koetschan, Christian; F{"o}rster, Frank; Merget, Benjamin; Wolf, Matthias in PLoS One (2011). 6(2) e16931.
  • Composition of epiphytic bacterial communities differs on petals and leaves Junker, Robert R; Loewel, Christina; Gross, Roy; D{"o}tterl, Stefan; Keller, Alexander; Bl{"u}thgen, Nico in Plant Biology (2011). 13(6) 918–924.
2010[ to top ]
  • The ITS2 Database III—sequences and structures for phylogeny Koetschan, Christian; F{"o}rster, Frank; Keller, Alexander; Schleicher, Tina; Ruderisch, Benjamin; Schwarz, Roland; M{"u}ller, Tobias; Wolf, Matthias; Schultz, J{"o}rg in Nucleic Acids Research (2010). 38(Suppl 1) D275-D279.
  • Ribosomal RNA phylogenetics: the third dimension Keller, Alexander; Wolf, Matthias; Dandekar, Thomas in Biologia (2010). 65(3) 388–391.
  • ITS2 sequence-structure phylogeny in the Scenedesmaceae with special reference to em Coelastrum em (Chlorophyta, Chlorophyceae), including the new genera em Comasiella em and em Pectinodesmusem Hegewald, Eberhard; Wolf, Matthias; Keller, Alexander; Friedl, Thomas; Krienitz, Lothar in Phycologia (2010). 49(4) 325–335.
  • Including RNA secondary structures improves accuracy and robustness in reconstruction of phylogenetic trees Keller, Alexander; F{"o}rster, Frank; M{"u}ller, Tobias; Dandekar, Thomas; Schultz, J{"o}rg; Wolf, Matthias; others in Biology Direct (2010). 5 4.
2009[ to top ]
  • The importance of environmental heterogeneity for species diversity and assemblage structure in Bornean stream frogs Keller, Alexander; R{"o}del, Mark-Oliver; Linsenmair, K Eduard; Grafe, T Ulmar in Journal of Animal Ecology (2009). 78(2) 305–314.
  • ITS2 secondary structure improves phylogeny estimation in a radiation of blue butterflies of the subgenus em Agrodiaetus em (Lepidoptera: Lycaenidae: \em Polyommatus\em ) Wiemers, Martin; Keller, Alexander; Wolf, Matthias in BMC Evolutionary Biology (2009). 9(1) 300.
  • Die Artenvielfalt der Amphibien in einem Tieflandregenwald auf Borneo Keller, Alexander (2009). 80–83.
  • A Bornean amphibian hotspot: the lowland mixed dipterocarp rainforest at Ulu Temburong National Park, Brunei Darussalam Grafe, T Ulmar; Keller, Alexander in Salamandra (2009). 45 16–25.
  • 5.8S-28S rRNA interaction and HMM-based ITS2 annotation Keller, Alexander; Schleicher, Tina; Schultz, J{"o}rg; M{"u}ller, Tobias; Dandekar, Thomas; Wolf, Matthias in Gene (2009). 430(1) 50–57.
2008[ to top ]
  • ITS2 data corroborate a monophyletic chlorophycean DO-group (Sphaeropleales) Keller, Alexander; Schleicher, Tina; F{"o}rster, Frank; Ruderisch, Benjamin; Dandekar, Thomas; M{"u}ller, Tobias; Wolf, Matthias in BMC Evolutionary Biology (2008). 8(1) 218.
  • Geographic distribution: Xenodermus javanicus (Short Note) Keller, Alexander; Siegle, Matthias; Grafe, T Ulmar in Herpetological Review (2008). 39 373.
  • Geographic distribution: Parias sumatranus (Short Note) Keller, Alexander; Siegle, Matthias; Grafe, T Ulmar in Herpetological Review (2008). 39 373.